feat(writer): 🎉 Add filename sanitization for DBML identifiers

* Implement SanitizeFilename function to clean identifiers
* Remove quotes, comments, and invalid characters from filenames
* Update filename generation in writers to use sanitized names

.claude/settings.json

@@ -4,10 +4,7 @@
     "description": "Database Relations Specification Tool for Go",
     "language": "go"
   },
-  "agent": {
+
-    "preferred": "Explore",
-    "description": "Use Explore agent for fast codebase navigation and Go project exploration"
-  },
   "codeStyle": {
     "useGofmt": true,
     "lineLength": 100,

.github/workflows/integration-tests.yml

@@ -46,6 +46,11 @@ jobs:
     - name: Download dependencies
       run: go mod download
 
+    - name: Install PostgreSQL client
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y postgresql-client
+
     - name: Initialize test database
       env:
         PGPASSWORD: relspec_test_password

README.md

@@ -85,6 +85,29 @@ RelSpec includes a powerful schema validation and linting tool:
 ## Use of AI
 [Rules and use of AI](./AI_USE.md)
 
+## User Interface
+
+RelSpec provides an interactive terminal-based user interface for managing and editing database schemas. The UI allows you to:
+
+- **Browse Databases** - Navigate through your database structure with an intuitive menu system
+- **Edit Schemas** - Create, modify, and organize database schemas
+- **Manage Tables** - Add, update, or delete tables with full control over structure
+- **Configure Columns** - Define column properties, data types, constraints, and relationships
+- **Interactive Editing** - Real-time validation and feedback as you make changes
+
+The interface supports multiple input formats, making it easy to load, edit, and save your database definitions in various formats.
+
+<p align="center" width="100%">
+<img  src="./assets/image/screenshots/main_screen.jpg"> 
+</p>
+<p align="center" width="100%">
+<img  src="./assets/image/screenshots/table_view.jpg"> 
+</p>
+<p align="center" width="100%">
+<img src="./assets/image/screenshots/edit_column.jpg"> 
+</p>
+
+
 ## Installation
 
 ```bash
@@ -95,6 +118,55 @@ go install -v git.warky.dev/wdevs/relspecgo/cmd/relspec@latest
 
 ## Usage
 
+### Interactive Schema Editor
+
+```bash
+# Launch interactive editor with a DBML schema
+relspec edit --from dbml --from-path schema.dbml --to dbml --to-path schema.dbml
+
+# Edit PostgreSQL database in place
+relspec edit --from pgsql --from-conn "postgres://user:pass@localhost/mydb" \
+             --to pgsql --to-conn "postgres://user:pass@localhost/mydb"
+
+# Edit JSON schema and save as GORM models
+relspec edit --from json --from-path db.json --to gorm --to-path models/
+```
+
+The `edit` command launches an interactive terminal user interface where you can:
+- Browse and navigate your database structure
+- Create, modify, and delete schemas, tables, and columns
+- Configure column properties, constraints, and relationships
+- Save changes to various formats
+- Import and merge schemas from other databases
+
+### Schema Merging
+
+```bash
+# Merge two JSON schemas (additive merge - adds missing items only)
+relspec merge --target json --target-path base.json \
+              --source json --source-path additions.json \
+              --output json --output-path merged.json
+
+# Merge PostgreSQL database into JSON, skipping specific tables
+relspec merge --target json --target-path current.json \
+              --source pgsql --source-conn "postgres://user:pass@localhost/source_db" \
+              --output json --output-path updated.json \
+              --skip-tables "audit_log,temp_tables"
+
+# Cross-format merge (DBML + YAML → JSON)
+relspec merge --target dbml --target-path base.dbml \
+              --source yaml --source-path additions.yaml \
+              --output json --output-path result.json \
+              --skip-relations --skip-views
+```
+
+The `merge` command combines two database schemas additively:
+- Adds missing schemas, tables, columns, and other objects
+- Never modifies or deletes existing items (safe operation)
+- Supports selective merging with skip options (domains, relations, enums, views, sequences, specific tables)
+- Works across any combination of supported formats
+- Perfect for integrating multiple schema definitions or applying patches
+
 ### Schema Conversion
 
 ```bash

TODO.md

@@ -22,6 +22,17 @@
 - [✔️] GraphQL schema generation
 
 
+## UI 
+- [✔️] Basic UI (I went with tview)
+- [✔️] Save / Load Database
+- [✔️] Schemas / Domains / Tables
+- [  ] Add Relations
+- [  ] Add Indexes
+- [  ] Add Views
+- [  ] Add Sequences
+- [  ] Add Scripts
+- [  ] Domain / Table Assignment
+
 ## Documentation
 - [ ] API documentation (godoc)
 - [ ] Usage examples for each format combination

cmd/relspec/edit.go

@@ -0,0 +1,334 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/bun"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/dbml"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/dctx"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/drawdb"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/drizzle"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/gorm"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/graphql"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/json"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/pgsql"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/prisma"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/typeorm"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/yaml"
+	"git.warky.dev/wdevs/relspecgo/pkg/ui"
+	"git.warky.dev/wdevs/relspecgo/pkg/writers"
+	wbun "git.warky.dev/wdevs/relspecgo/pkg/writers/bun"
+	wdbml "git.warky.dev/wdevs/relspecgo/pkg/writers/dbml"
+	wdctx "git.warky.dev/wdevs/relspecgo/pkg/writers/dctx"
+	wdrawdb "git.warky.dev/wdevs/relspecgo/pkg/writers/drawdb"
+	wdrizzle "git.warky.dev/wdevs/relspecgo/pkg/writers/drizzle"
+	wgorm "git.warky.dev/wdevs/relspecgo/pkg/writers/gorm"
+	wgraphql "git.warky.dev/wdevs/relspecgo/pkg/writers/graphql"
+	wjson "git.warky.dev/wdevs/relspecgo/pkg/writers/json"
+	wpgsql "git.warky.dev/wdevs/relspecgo/pkg/writers/pgsql"
+	wprisma "git.warky.dev/wdevs/relspecgo/pkg/writers/prisma"
+	wtypeorm "git.warky.dev/wdevs/relspecgo/pkg/writers/typeorm"
+	wyaml "git.warky.dev/wdevs/relspecgo/pkg/writers/yaml"
+)
+
+var (
+	editSourceType   string
+	editSourcePath   string
+	editSourceConn   string
+	editTargetType   string
+	editTargetPath   string
+	editSchemaFilter string
+)
+
+var editCmd = &cobra.Command{
+	Use:   "edit",
+	Short: "Edit database schema interactively with TUI",
+	Long: `Edit database schemas from various formats using an interactive terminal UI.
+
+Allows you to:
+  - List and navigate schemas and tables
+  - Create, edit, and delete schemas
+  - Create, edit, and delete tables
+  - Add, edit, and delete columns
+  - Set table and column properties
+  - Add constraints, indexes, and relationships
+
+Supports reading from and writing to all supported formats:
+  Input formats:
+    - dbml: DBML schema files
+    - dctx: DCTX schema files
+    - drawdb: DrawDB JSON files
+    - graphql: GraphQL schema files (.graphql, SDL)
+    - json: JSON database schema
+    - yaml: YAML database schema
+    - gorm: GORM model files (Go, file or directory)
+    - bun: Bun model files (Go, file or directory)
+    - drizzle: Drizzle ORM schema files (TypeScript, file or directory)
+    - prisma: Prisma schema files (.prisma)
+    - typeorm: TypeORM entity files (TypeScript)
+    - pgsql: PostgreSQL database (live connection)
+
+  Output formats:
+    - dbml: DBML schema files
+    - dctx: DCTX schema files
+    - drawdb: DrawDB JSON files
+    - graphql: GraphQL schema files (.graphql, SDL)
+    - json: JSON database schema
+    - yaml: YAML database schema
+    - gorm: GORM model files (Go)
+    - bun: Bun model files (Go)
+    - drizzle: Drizzle ORM schema files (TypeScript)
+    - prisma: Prisma schema files (.prisma)
+    - typeorm: TypeORM entity files (TypeScript)
+    - pgsql: PostgreSQL SQL schema
+
+PostgreSQL Connection String Examples:
+  postgres://username:password@localhost:5432/database_name
+  postgres://username:password@localhost/database_name
+  postgresql://user:pass@host:5432/dbname?sslmode=disable
+  postgresql://user:pass@host/dbname?sslmode=require
+  host=localhost port=5432 user=username password=pass dbname=mydb sslmode=disable
+
+Examples:
+  # Edit a DBML schema file
+  relspec edit --from dbml --from-path schema.dbml --to dbml --to-path schema.dbml
+
+  # Edit a PostgreSQL database
+  relspec edit --from pgsql --from-conn "postgres://user:pass@localhost/mydb" \
+               --to pgsql --to-conn "postgres://user:pass@localhost/mydb"
+
+  # Edit JSON schema and output to GORM
+  relspec edit --from json --from-path db.json --to gorm --to-path models/
+
+  # Edit GORM models in place
+  relspec edit --from gorm --from-path ./models --to gorm --to-path ./models`,
+	RunE: runEdit,
+}
+
+func init() {
+	editCmd.Flags().StringVar(&editSourceType, "from", "", "Source format (dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql)")
+	editCmd.Flags().StringVar(&editSourcePath, "from-path", "", "Source file path (for file-based formats)")
+	editCmd.Flags().StringVar(&editSourceConn, "from-conn", "", "Source connection string (for database formats)")
+	editCmd.Flags().StringVar(&editTargetType, "to", "", "Target format (dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql)")
+	editCmd.Flags().StringVar(&editTargetPath, "to-path", "", "Target file path (for file-based formats)")
+	editCmd.Flags().StringVar(&editSchemaFilter, "schema", "", "Filter to a specific schema by name")
+
+	// Flags are now optional - if not provided, UI will prompt for load/save options
+}
+
+func runEdit(cmd *cobra.Command, args []string) error {
+	fmt.Fprintf(os.Stderr, "\n=== RelSpec Schema Editor ===\n")
+	fmt.Fprintf(os.Stderr, "Started at: %s\n\n", getCurrentTimestamp())
+
+	var db *models.Database
+	var loadConfig *ui.LoadConfig
+	var saveConfig *ui.SaveConfig
+	var err error
+
+	// Check if source parameters are provided
+	if editSourceType != "" {
+		// Read source database
+		fmt.Fprintf(os.Stderr, "[1/3] Reading source schema...\n")
+		fmt.Fprintf(os.Stderr, "      Format: %s\n", editSourceType)
+		if editSourcePath != "" {
+			fmt.Fprintf(os.Stderr, "      Path:   %s\n", editSourcePath)
+		}
+		if editSourceConn != "" {
+			fmt.Fprintf(os.Stderr, "      Conn:   %s\n", maskPassword(editSourceConn))
+		}
+
+		db, err = readDatabaseForEdit(editSourceType, editSourcePath, editSourceConn, "Source")
+		if err != nil {
+			return fmt.Errorf("failed to read source: %w", err)
+		}
+
+		// Apply schema filter if specified
+		if editSchemaFilter != "" {
+			db = filterDatabaseBySchema(db, editSchemaFilter)
+		}
+
+		fmt.Fprintf(os.Stderr, "      ✓ Successfully read database '%s'\n", db.Name)
+		fmt.Fprintf(os.Stderr, "      Found: %d schema(s)\n", len(db.Schemas))
+
+		totalTables := 0
+		for _, schema := range db.Schemas {
+			totalTables += len(schema.Tables)
+		}
+		fmt.Fprintf(os.Stderr, "      Found: %d table(s)\n\n", totalTables)
+
+		// Store load config
+		loadConfig = &ui.LoadConfig{
+			SourceType: editSourceType,
+			FilePath:   editSourcePath,
+			ConnString: editSourceConn,
+		}
+	} else {
+		// No source parameters provided, UI will show load screen
+		fmt.Fprintf(os.Stderr, "[1/2] No source specified, editor will prompt for database\n\n")
+	}
+
+	// Store save config if target parameters are provided
+	if editTargetType != "" {
+		saveConfig = &ui.SaveConfig{
+			TargetType: editTargetType,
+			FilePath:   editTargetPath,
+		}
+	}
+
+	// Launch interactive TUI
+	if editSourceType != "" {
+		fmt.Fprintf(os.Stderr, "[2/3] Launching interactive editor...\n")
+	} else {
+		fmt.Fprintf(os.Stderr, "[2/2] Launching interactive editor...\n")
+	}
+	fmt.Fprintf(os.Stderr, "      Use arrow keys and shortcuts to navigate\n")
+	fmt.Fprintf(os.Stderr, "      Press ? for help\n\n")
+
+	editor := ui.NewSchemaEditorWithConfigs(db, loadConfig, saveConfig)
+	if err := editor.Run(); err != nil {
+		return fmt.Errorf("editor failed: %w", err)
+	}
+
+	// Only write to output if target parameters were provided and database was loaded from command line
+	if editTargetType != "" && editSourceType != "" && db != nil {
+		fmt.Fprintf(os.Stderr, "[3/3] Writing changes to output...\n")
+		fmt.Fprintf(os.Stderr, "      Format: %s\n", editTargetType)
+		if editTargetPath != "" {
+			fmt.Fprintf(os.Stderr, "      Path:   %s\n", editTargetPath)
+		}
+
+		// Get the potentially modified database from the editor
+		err = writeDatabaseForEdit(editTargetType, editTargetPath, "", editor.GetDatabase(), "Target")
+		if err != nil {
+			return fmt.Errorf("failed to write output: %w", err)
+		}
+
+		fmt.Fprintf(os.Stderr, "      ✓ Successfully written database\n")
+	}
+
+	fmt.Fprintf(os.Stderr, "\n=== Edit complete ===\n")
+
+	return nil
+}
+
+func readDatabaseForEdit(dbType, filePath, connString, label string) (*models.Database, error) {
+	var reader readers.Reader
+
+	switch strings.ToLower(dbType) {
+	case "dbml":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for DBML format", label)
+		}
+		reader = dbml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "dctx":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for DCTX format", label)
+		}
+		reader = dctx.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drawdb":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for DrawDB format", label)
+		}
+		reader = drawdb.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "graphql":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for GraphQL format", label)
+		}
+		reader = graphql.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "json":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for JSON format", label)
+		}
+		reader = json.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "yaml":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for YAML format", label)
+		}
+		reader = yaml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "gorm":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for GORM format", label)
+		}
+		reader = gorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "bun":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for Bun format", label)
+		}
+		reader = bun.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drizzle":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for Drizzle format", label)
+		}
+		reader = drizzle.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "prisma":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for Prisma format", label)
+		}
+		reader = prisma.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "typeorm":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for TypeORM format", label)
+		}
+		reader = typeorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "pgsql":
+		if connString == "" {
+			return nil, fmt.Errorf("%s: connection string is required for PostgreSQL format", label)
+		}
+		reader = pgsql.NewReader(&readers.ReaderOptions{ConnectionString: connString})
+	default:
+		return nil, fmt.Errorf("%s: unsupported format: %s", label, dbType)
+	}
+
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		return nil, fmt.Errorf("%s: %w", label, err)
+	}
+
+	return db, nil
+}
+
+func writeDatabaseForEdit(dbType, filePath, connString string, db *models.Database, label string) error {
+	var writer writers.Writer
+
+	switch strings.ToLower(dbType) {
+	case "dbml":
+		writer = wdbml.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "dctx":
+		writer = wdctx.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "drawdb":
+		writer = wdrawdb.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "graphql":
+		writer = wgraphql.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "json":
+		writer = wjson.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "yaml":
+		writer = wyaml.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "gorm":
+		writer = wgorm.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "bun":
+		writer = wbun.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "drizzle":
+		writer = wdrizzle.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "prisma":
+		writer = wprisma.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "typeorm":
+		writer = wtypeorm.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "pgsql":
+		writer = wpgsql.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	default:
+		return fmt.Errorf("%s: unsupported format: %s", label, dbType)
+	}
+
+	err := writer.WriteDatabase(db)
+	if err != nil {
+		return fmt.Errorf("%s: %w", label, err)
+	}
+
+	return nil
+}

cmd/relspec/merge.go

@@ -0,0 +1,433 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/merge"
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/bun"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/dbml"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/dctx"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/drawdb"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/drizzle"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/gorm"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/graphql"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/json"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/pgsql"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/prisma"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/typeorm"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers/yaml"
+	"git.warky.dev/wdevs/relspecgo/pkg/writers"
+	wbun "git.warky.dev/wdevs/relspecgo/pkg/writers/bun"
+	wdbml "git.warky.dev/wdevs/relspecgo/pkg/writers/dbml"
+	wdctx "git.warky.dev/wdevs/relspecgo/pkg/writers/dctx"
+	wdrawdb "git.warky.dev/wdevs/relspecgo/pkg/writers/drawdb"
+	wdrizzle "git.warky.dev/wdevs/relspecgo/pkg/writers/drizzle"
+	wgorm "git.warky.dev/wdevs/relspecgo/pkg/writers/gorm"
+	wgraphql "git.warky.dev/wdevs/relspecgo/pkg/writers/graphql"
+	wjson "git.warky.dev/wdevs/relspecgo/pkg/writers/json"
+	wpgsql "git.warky.dev/wdevs/relspecgo/pkg/writers/pgsql"
+	wprisma "git.warky.dev/wdevs/relspecgo/pkg/writers/prisma"
+	wtypeorm "git.warky.dev/wdevs/relspecgo/pkg/writers/typeorm"
+	wyaml "git.warky.dev/wdevs/relspecgo/pkg/writers/yaml"
+)
+
+var (
+	mergeTargetType    string
+	mergeTargetPath    string
+	mergeTargetConn    string
+	mergeSourceType    string
+	mergeSourcePath    string
+	mergeSourceConn    string
+	mergeOutputType    string
+	mergeOutputPath    string
+	mergeOutputConn    string
+	mergeSkipDomains   bool
+	mergeSkipRelations bool
+	mergeSkipEnums     bool
+	mergeSkipViews     bool
+	mergeSkipSequences bool
+	mergeSkipTables    string // Comma-separated table names to skip
+	mergeVerbose       bool
+)
+
+var mergeCmd = &cobra.Command{
+	Use:   "merge",
+	Short: "Merge database schemas (additive only - adds missing items)",
+	Long: `Merge one database schema into another. Performs additive merging only:
+adds missing schemas, tables, columns, and other objects without modifying
+or deleting existing items.
+
+The target database is loaded first, then the source database is merged into it.
+The result can be saved to a new format or updated in place.
+
+Examples:
+  # Merge two JSON schemas
+  relspec merge --target json --target-path base.json \
+                --source json --source-path additional.json \
+                --output json --output-path merged.json
+
+  # Merge from PostgreSQL into JSON
+  relspec merge --target json --target-path mydb.json \
+                --source pgsql --source-conn "postgres://user:pass@localhost/source_db" \
+                --output json --output-path combined.json
+
+  # Merge DBML and YAML, skip relations
+  relspec merge --target dbml --target-path schema.dbml \
+                --source yaml --source-path tables.yaml \
+                --output dbml --output-path merged.dbml \
+                --skip-relations
+
+  # Merge and save back to target format
+  relspec merge --target json --target-path base.json \
+                --source json --source-path patch.json \
+                --output json --output-path base.json`,
+	RunE: runMerge,
+}
+
+func init() {
+	// Target database flags
+	mergeCmd.Flags().StringVar(&mergeTargetType, "target", "", "Target format (required): dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql")
+	mergeCmd.Flags().StringVar(&mergeTargetPath, "target-path", "", "Target file path (required for file-based formats)")
+	mergeCmd.Flags().StringVar(&mergeTargetConn, "target-conn", "", "Target connection string (required for pgsql)")
+
+	// Source database flags
+	mergeCmd.Flags().StringVar(&mergeSourceType, "source", "", "Source format (required): dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql")
+	mergeCmd.Flags().StringVar(&mergeSourcePath, "source-path", "", "Source file path (required for file-based formats)")
+	mergeCmd.Flags().StringVar(&mergeSourceConn, "source-conn", "", "Source connection string (required for pgsql)")
+
+	// Output flags
+	mergeCmd.Flags().StringVar(&mergeOutputType, "output", "", "Output format (required): dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql")
+	mergeCmd.Flags().StringVar(&mergeOutputPath, "output-path", "", "Output file path (required for file-based formats)")
+	mergeCmd.Flags().StringVar(&mergeOutputConn, "output-conn", "", "Output connection string (for pgsql)")
+
+	// Merge options
+	mergeCmd.Flags().BoolVar(&mergeSkipDomains, "skip-domains", false, "Skip domains during merge")
+	mergeCmd.Flags().BoolVar(&mergeSkipRelations, "skip-relations", false, "Skip relations during merge")
+	mergeCmd.Flags().BoolVar(&mergeSkipEnums, "skip-enums", false, "Skip enums during merge")
+	mergeCmd.Flags().BoolVar(&mergeSkipViews, "skip-views", false, "Skip views during merge")
+	mergeCmd.Flags().BoolVar(&mergeSkipSequences, "skip-sequences", false, "Skip sequences during merge")
+	mergeCmd.Flags().StringVar(&mergeSkipTables, "skip-tables", "", "Comma-separated list of table names to skip during merge")
+	mergeCmd.Flags().BoolVar(&mergeVerbose, "verbose", false, "Show verbose output")
+}
+
+func runMerge(cmd *cobra.Command, args []string) error {
+	fmt.Fprintf(os.Stderr, "\n=== RelSpec Merge ===\n")
+	fmt.Fprintf(os.Stderr, "Started at: %s\n\n", getCurrentTimestamp())
+
+	// Validate required flags
+	if mergeTargetType == "" {
+		return fmt.Errorf("--target format is required")
+	}
+	if mergeSourceType == "" {
+		return fmt.Errorf("--source format is required")
+	}
+	if mergeOutputType == "" {
+		return fmt.Errorf("--output format is required")
+	}
+
+	// Validate and expand file paths
+	if mergeTargetType != "pgsql" {
+		if mergeTargetPath == "" {
+			return fmt.Errorf("--target-path is required for %s format", mergeTargetType)
+		}
+		mergeTargetPath = expandPath(mergeTargetPath)
+	} else if mergeTargetConn == "" {
+
+		return fmt.Errorf("--target-conn is required for pgsql format")
+
+	}
+
+	if mergeSourceType != "pgsql" {
+		if mergeSourcePath == "" {
+			return fmt.Errorf("--source-path is required for %s format", mergeSourceType)
+		}
+		mergeSourcePath = expandPath(mergeSourcePath)
+	} else if mergeSourceConn == "" {
+		return fmt.Errorf("--source-conn is required for pgsql format")
+	}
+
+	if mergeOutputType != "pgsql" {
+		if mergeOutputPath == "" {
+			return fmt.Errorf("--output-path is required for %s format", mergeOutputType)
+		}
+		mergeOutputPath = expandPath(mergeOutputPath)
+	}
+
+	// Step 1: Read target database
+	fmt.Fprintf(os.Stderr, "[1/3] Reading target database...\n")
+	fmt.Fprintf(os.Stderr, "      Format: %s\n", mergeTargetType)
+	if mergeTargetPath != "" {
+		fmt.Fprintf(os.Stderr, "      Path:   %s\n", mergeTargetPath)
+	}
+	if mergeTargetConn != "" {
+		fmt.Fprintf(os.Stderr, "      Conn:   %s\n", maskPassword(mergeTargetConn))
+	}
+
+	targetDB, err := readDatabaseForMerge(mergeTargetType, mergeTargetPath, mergeTargetConn, "Target")
+	if err != nil {
+		return fmt.Errorf("failed to read target database: %w", err)
+	}
+	fmt.Fprintf(os.Stderr, "      ✓ Successfully read target database '%s'\n", targetDB.Name)
+	printDatabaseStats(targetDB)
+
+	// Step 2: Read source database
+	fmt.Fprintf(os.Stderr, "\n[2/3] Reading source database...\n")
+	fmt.Fprintf(os.Stderr, "      Format: %s\n", mergeSourceType)
+	if mergeSourcePath != "" {
+		fmt.Fprintf(os.Stderr, "      Path:   %s\n", mergeSourcePath)
+	}
+	if mergeSourceConn != "" {
+		fmt.Fprintf(os.Stderr, "      Conn:   %s\n", maskPassword(mergeSourceConn))
+	}
+
+	sourceDB, err := readDatabaseForMerge(mergeSourceType, mergeSourcePath, mergeSourceConn, "Source")
+	if err != nil {
+		return fmt.Errorf("failed to read source database: %w", err)
+	}
+	fmt.Fprintf(os.Stderr, "      ✓ Successfully read source database '%s'\n", sourceDB.Name)
+	printDatabaseStats(sourceDB)
+
+	// Step 3: Merge databases
+	fmt.Fprintf(os.Stderr, "\n[3/3] Merging databases...\n")
+
+	opts := &merge.MergeOptions{
+		SkipDomains:   mergeSkipDomains,
+		SkipRelations: mergeSkipRelations,
+		SkipEnums:     mergeSkipEnums,
+		SkipViews:     mergeSkipViews,
+		SkipSequences: mergeSkipSequences,
+	}
+
+	// Parse skip-tables flag
+	if mergeSkipTables != "" {
+		opts.SkipTableNames = parseSkipTables(mergeSkipTables)
+		if len(opts.SkipTableNames) > 0 {
+			fmt.Fprintf(os.Stderr, "      Skipping tables: %s\n", mergeSkipTables)
+		}
+	}
+
+	result := merge.MergeDatabases(targetDB, sourceDB, opts)
+
+	// Update timestamp
+	targetDB.UpdateDate()
+
+	// Print merge summary
+	fmt.Fprintf(os.Stderr, "      ✓ Merge complete\n\n")
+	fmt.Fprintf(os.Stderr, "%s\n", merge.GetMergeSummary(result))
+
+	// Step 4: Write output
+	fmt.Fprintf(os.Stderr, "\n[4/4] Writing output...\n")
+	fmt.Fprintf(os.Stderr, "      Format: %s\n", mergeOutputType)
+	if mergeOutputPath != "" {
+		fmt.Fprintf(os.Stderr, "      Path:   %s\n", mergeOutputPath)
+	}
+
+	err = writeDatabaseForMerge(mergeOutputType, mergeOutputPath, "", targetDB, "Output")
+	if err != nil {
+		return fmt.Errorf("failed to write output: %w", err)
+	}
+
+	fmt.Fprintf(os.Stderr, "      ✓ Successfully written merged database\n")
+	fmt.Fprintf(os.Stderr, "\n=== Merge complete ===\n")
+
+	return nil
+}
+
+func readDatabaseForMerge(dbType, filePath, connString, label string) (*models.Database, error) {
+	var reader readers.Reader
+
+	switch strings.ToLower(dbType) {
+	case "dbml":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for DBML format", label)
+		}
+		reader = dbml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "dctx":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for DCTX format", label)
+		}
+		reader = dctx.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drawdb":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for DrawDB format", label)
+		}
+		reader = drawdb.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "graphql":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for GraphQL format", label)
+		}
+		reader = graphql.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "json":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for JSON format", label)
+		}
+		reader = json.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "yaml":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for YAML format", label)
+		}
+		reader = yaml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "gorm":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for GORM format", label)
+		}
+		reader = gorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "bun":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for Bun format", label)
+		}
+		reader = bun.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drizzle":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for Drizzle format", label)
+		}
+		reader = drizzle.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "prisma":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for Prisma format", label)
+		}
+		reader = prisma.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "typeorm":
+		if filePath == "" {
+			return nil, fmt.Errorf("%s: file path is required for TypeORM format", label)
+		}
+		reader = typeorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "pgsql":
+		if connString == "" {
+			return nil, fmt.Errorf("%s: connection string is required for PostgreSQL format", label)
+		}
+		reader = pgsql.NewReader(&readers.ReaderOptions{ConnectionString: connString})
+	default:
+		return nil, fmt.Errorf("%s: unsupported format '%s'", label, dbType)
+	}
+
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		return nil, err
+	}
+
+	return db, nil
+}
+
+func writeDatabaseForMerge(dbType, filePath, connString string, db *models.Database, label string) error {
+	var writer writers.Writer
+
+	switch strings.ToLower(dbType) {
+	case "dbml":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for DBML format", label)
+		}
+		writer = wdbml.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "dctx":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for DCTX format", label)
+		}
+		writer = wdctx.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "drawdb":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for DrawDB format", label)
+		}
+		writer = wdrawdb.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "graphql":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for GraphQL format", label)
+		}
+		writer = wgraphql.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "json":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for JSON format", label)
+		}
+		writer = wjson.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "yaml":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for YAML format", label)
+		}
+		writer = wyaml.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "gorm":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for GORM format", label)
+		}
+		writer = wgorm.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "bun":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for Bun format", label)
+		}
+		writer = wbun.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "drizzle":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for Drizzle format", label)
+		}
+		writer = wdrizzle.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "prisma":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for Prisma format", label)
+		}
+		writer = wprisma.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "typeorm":
+		if filePath == "" {
+			return fmt.Errorf("%s: file path is required for TypeORM format", label)
+		}
+		writer = wtypeorm.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "pgsql":
+		writer = wpgsql.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	default:
+		return fmt.Errorf("%s: unsupported format '%s'", label, dbType)
+	}
+
+	return writer.WriteDatabase(db)
+}
+
+func expandPath(path string) string {
+	if len(path) > 0 && path[0] == '~' {
+		home, err := os.UserHomeDir()
+		if err == nil {
+			return filepath.Join(home, path[1:])
+		}
+	}
+	return path
+}
+
+func printDatabaseStats(db *models.Database) {
+	totalTables := 0
+	totalColumns := 0
+	totalConstraints := 0
+	totalIndexes := 0
+
+	for _, schema := range db.Schemas {
+		totalTables += len(schema.Tables)
+		for _, table := range schema.Tables {
+			totalColumns += len(table.Columns)
+			totalConstraints += len(table.Constraints)
+			totalIndexes += len(table.Indexes)
+		}
+	}
+
+	fmt.Fprintf(os.Stderr, "      Schemas: %d, Tables: %d, Columns: %d, Constraints: %d, Indexes: %d\n",
+		len(db.Schemas), totalTables, totalColumns, totalConstraints, totalIndexes)
+}
+
+func parseSkipTables(skipTablesStr string) map[string]bool {
+	skipTables := make(map[string]bool)
+	if skipTablesStr == "" {
+		return skipTables
+	}
+
+	// Split by comma and trim whitespace
+	parts := strings.Split(skipTablesStr, ",")
+	for _, part := range parts {
+		trimmed := strings.TrimSpace(part)
+		if trimmed != "" {
+			// Store in lowercase for case-insensitive matching
+			skipTables[strings.ToLower(trimmed)] = true
+		}
+	}
+
+	return skipTables
+}

cmd/relspec/root.go

@@ -21,4 +21,7 @@ func init() {
 	rootCmd.AddCommand(inspectCmd)
 	rootCmd.AddCommand(scriptsCmd)
 	rootCmd.AddCommand(templCmd)
+	rootCmd.AddCommand(editCmd)
+	rootCmd.AddCommand(mergeCmd)
+	rootCmd.AddCommand(splitCmd)
 }

cmd/relspec/split.go

@@ -0,0 +1,318 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+var (
+	splitSourceType    string
+	splitSourcePath    string
+	splitSourceConn    string
+	splitTargetType    string
+	splitTargetPath    string
+	splitSchemas       string
+	splitTables        string
+	splitPackageName   string
+	splitDatabaseName  string
+	splitExcludeSchema string
+	splitExcludeTables string
+)
+
+var splitCmd = &cobra.Command{
+	Use:   "split",
+	Short: "Split database schemas to extract selected tables into a separate database",
+	Long: `Extract selected schemas and tables from a database and write them to a separate output.
+
+The split command allows you to:
+- Select specific schemas to include in the output
+- Select specific tables within schemas
+- Exclude specific schemas or tables if preferred
+- Export the selected subset to any supported format
+
+Input formats:
+  - dbml: DBML schema files
+  - dctx: DCTX schema files
+  - drawdb: DrawDB JSON files
+  - graphql: GraphQL schema files (.graphql, SDL)
+  - json: JSON database schema
+  - yaml: YAML database schema
+  - gorm: GORM model files (Go, file or directory)
+  - bun: Bun model files (Go, file or directory)
+  - drizzle: Drizzle ORM schema files (TypeScript, file or directory)
+  - prisma: Prisma schema files (.prisma)
+  - typeorm: TypeORM entity files (TypeScript)
+  - pgsql: PostgreSQL database (live connection)
+
+Output formats:
+  - dbml: DBML schema files
+  - dctx: DCTX schema files
+  - drawdb: DrawDB JSON files
+  - graphql: GraphQL schema files (.graphql, SDL)
+  - json: JSON database schema
+  - yaml: YAML database schema
+  - gorm: GORM model files (Go)
+  - bun: Bun model files (Go)
+  - drizzle: Drizzle ORM schema files (TypeScript)
+  - prisma: Prisma schema files (.prisma)
+  - typeorm: TypeORM entity files (TypeScript)
+  - pgsql: PostgreSQL SQL schema
+
+Examples:
+  # Split specific schemas from DBML
+  relspec split --from dbml --from-path schema.dbml \
+                --schemas public,auth \
+                --to json --to-path subset.json
+
+  # Extract specific tables from PostgreSQL
+  relspec split --from pgsql \
+                --from-conn "postgres://user:pass@localhost:5432/mydb" \
+                --schemas public \
+                --tables users,orders,products \
+                --to dbml --to-path subset.dbml
+
+  # Exclude specific tables
+  relspec split --from json --from-path schema.json \
+                --exclude-tables "audit_log,system_config,temp_data" \
+                --to json --to-path public_schema.json
+
+  # Split and convert to GORM
+  relspec split --from json --from-path schema.json \
+                --tables "users,posts,comments" \
+                --to gorm --to-path models/ --package models \
+                --database-name MyAppDB
+
+  # Exclude specific schema and tables
+  relspec split --from pgsql \
+                --from-conn "postgres://user:pass@localhost/db" \
+                --exclude-schema pg_catalog,information_schema \
+                --exclude-tables "temp_users,debug_logs" \
+                --to json --to-path public_schema.json`,
+	RunE: runSplit,
+}
+
+func init() {
+	splitCmd.Flags().StringVar(&splitSourceType, "from", "", "Source format (dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql)")
+	splitCmd.Flags().StringVar(&splitSourcePath, "from-path", "", "Source file path (for file-based formats)")
+	splitCmd.Flags().StringVar(&splitSourceConn, "from-conn", "", "Source connection string (for database formats)")
+
+	splitCmd.Flags().StringVar(&splitTargetType, "to", "", "Target format (dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql)")
+	splitCmd.Flags().StringVar(&splitTargetPath, "to-path", "", "Target output path (file or directory)")
+	splitCmd.Flags().StringVar(&splitPackageName, "package", "", "Package name (for code generation formats like gorm/bun)")
+	splitCmd.Flags().StringVar(&splitDatabaseName, "database-name", "", "Override database name in output")
+
+	splitCmd.Flags().StringVar(&splitSchemas, "schemas", "", "Comma-separated list of schema names to include")
+	splitCmd.Flags().StringVar(&splitTables, "tables", "", "Comma-separated list of table names to include (case-insensitive)")
+	splitCmd.Flags().StringVar(&splitExcludeSchema, "exclude-schema", "", "Comma-separated list of schema names to exclude")
+	splitCmd.Flags().StringVar(&splitExcludeTables, "exclude-tables", "", "Comma-separated list of table names to exclude (case-insensitive)")
+
+	err := splitCmd.MarkFlagRequired("from")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error marking from flag as required: %v\n", err)
+	}
+	err = splitCmd.MarkFlagRequired("to")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error marking to flag as required: %v\n", err)
+	}
+	err = splitCmd.MarkFlagRequired("to-path")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Error marking to-path flag as required: %v\n", err)
+	}
+}
+
+func runSplit(cmd *cobra.Command, args []string) error {
+	fmt.Fprintf(os.Stderr, "\n=== RelSpec Schema Split ===\n")
+	fmt.Fprintf(os.Stderr, "Started at: %s\n\n", getCurrentTimestamp())
+
+	// Read source database
+	fmt.Fprintf(os.Stderr, "[1/3] Reading source schema...\n")
+	fmt.Fprintf(os.Stderr, "      Format: %s\n", splitSourceType)
+	if splitSourcePath != "" {
+		fmt.Fprintf(os.Stderr, "      Path:   %s\n", splitSourcePath)
+	}
+	if splitSourceConn != "" {
+		fmt.Fprintf(os.Stderr, "      Conn:   %s\n", maskPassword(splitSourceConn))
+	}
+
+	db, err := readDatabaseForConvert(splitSourceType, splitSourcePath, splitSourceConn)
+	if err != nil {
+		return fmt.Errorf("failed to read source: %w", err)
+	}
+
+	fmt.Fprintf(os.Stderr, "      ✓ Successfully read database '%s'\n", db.Name)
+	fmt.Fprintf(os.Stderr, "      Found: %d schema(s)\n", len(db.Schemas))
+
+	totalTables := 0
+	for _, schema := range db.Schemas {
+		totalTables += len(schema.Tables)
+	}
+	fmt.Fprintf(os.Stderr, "      Found: %d table(s)\n\n", totalTables)
+
+	// Filter the database
+	fmt.Fprintf(os.Stderr, "[2/3] Filtering schemas and tables...\n")
+	filteredDB, err := filterDatabase(db)
+	if err != nil {
+		return fmt.Errorf("failed to filter database: %w", err)
+	}
+
+	if splitDatabaseName != "" {
+		filteredDB.Name = splitDatabaseName
+	}
+
+	filteredTables := 0
+	for _, schema := range filteredDB.Schemas {
+		filteredTables += len(schema.Tables)
+	}
+	fmt.Fprintf(os.Stderr, "      ✓ Filtered to: %d schema(s), %d table(s)\n\n", len(filteredDB.Schemas), filteredTables)
+
+	// Write to target format
+	fmt.Fprintf(os.Stderr, "[3/3] Writing to target format...\n")
+	fmt.Fprintf(os.Stderr, "      Format: %s\n", splitTargetType)
+	fmt.Fprintf(os.Stderr, "      Output: %s\n", splitTargetPath)
+	if splitPackageName != "" {
+		fmt.Fprintf(os.Stderr, "      Package: %s\n", splitPackageName)
+	}
+
+	err = writeDatabase(
+		filteredDB,
+		splitTargetType,
+		splitTargetPath,
+		splitPackageName,
+		"", // no schema filter for split
+	)
+	if err != nil {
+		return fmt.Errorf("failed to write output: %w", err)
+	}
+
+	fmt.Fprintf(os.Stderr, "      ✓ Successfully written to '%s'\n\n", splitTargetPath)
+	fmt.Fprintf(os.Stderr, "=== Split Completed Successfully ===\n")
+	fmt.Fprintf(os.Stderr, "Completed at: %s\n\n", getCurrentTimestamp())
+
+	return nil
+}
+
+// filterDatabase filters the database based on provided criteria
+func filterDatabase(db *models.Database) (*models.Database, error) {
+	filteredDB := &models.Database{
+		Name:            db.Name,
+		Description:     db.Description,
+		Comment:         db.Comment,
+		DatabaseType:    db.DatabaseType,
+		DatabaseVersion: db.DatabaseVersion,
+		SourceFormat:    db.SourceFormat,
+		UpdatedAt:       db.UpdatedAt,
+		GUID:            db.GUID,
+		Schemas:         []*models.Schema{},
+		Domains:         db.Domains, // Keep domains for now
+	}
+
+	// Parse filter flags
+	includeSchemas := parseCommaSeparated(splitSchemas)
+	includeTables := parseCommaSeparated(splitTables)
+	excludeSchemas := parseCommaSeparated(splitExcludeSchema)
+	excludeTables := parseCommaSeparated(splitExcludeTables)
+
+	// Convert table names to lowercase for case-insensitive matching
+	includeTablesLower := make(map[string]bool)
+	for _, t := range includeTables {
+		includeTablesLower[strings.ToLower(t)] = true
+	}
+
+	excludeTablesLower := make(map[string]bool)
+	for _, t := range excludeTables {
+		excludeTablesLower[strings.ToLower(t)] = true
+	}
+
+	// Iterate through schemas
+	for _, schema := range db.Schemas {
+		// Check if schema should be excluded
+		if contains(excludeSchemas, schema.Name) {
+			continue
+		}
+
+		// Check if schema should be included
+		if len(includeSchemas) > 0 && !contains(includeSchemas, schema.Name) {
+			continue
+		}
+
+		// Create a copy of the schema with filtered tables
+		filteredSchema := &models.Schema{
+			Name:        schema.Name,
+			Description: schema.Description,
+			Owner:       schema.Owner,
+			Permissions: schema.Permissions,
+			Comment:     schema.Comment,
+			Metadata:    schema.Metadata,
+			Scripts:     schema.Scripts,
+			Sequence:    schema.Sequence,
+			Relations:   schema.Relations,
+			Enums:       schema.Enums,
+			UpdatedAt:   schema.UpdatedAt,
+			GUID:        schema.GUID,
+			Tables:      []*models.Table{},
+			Views:       schema.Views,
+			Sequences:   schema.Sequences,
+		}
+
+		// Filter tables within the schema
+		for _, table := range schema.Tables {
+			tableLower := strings.ToLower(table.Name)
+
+			// Check if table should be excluded
+			if excludeTablesLower[tableLower] {
+				continue
+			}
+
+			// If specific tables are requested, only include those
+			if len(includeTablesLower) > 0 {
+				if !includeTablesLower[tableLower] {
+					continue
+				}
+			}
+			filteredSchema.Tables = append(filteredSchema.Tables, table)
+		}
+
+		// Only add schema if it has tables (unless no table filter was specified)
+		if len(filteredSchema.Tables) > 0 || (len(includeTablesLower) == 0 && len(excludeTablesLower) == 0) {
+			filteredDB.Schemas = append(filteredDB.Schemas, filteredSchema)
+		}
+	}
+
+	if len(filteredDB.Schemas) == 0 {
+		return nil, fmt.Errorf("no schemas matched the filter criteria")
+	}
+
+	return filteredDB, nil
+}
+
+// parseCommaSeparated parses a comma-separated string into a slice, trimming whitespace
+func parseCommaSeparated(s string) []string {
+	if s == "" {
+		return []string{}
+	}
+
+	parts := strings.Split(s, ",")
+	result := make([]string, 0, len(parts))
+	for _, p := range parts {
+		trimmed := strings.TrimSpace(p)
+		if trimmed != "" {
+			result = append(result, trimmed)
+		}
+	}
+	return result
+}
+
+// contains checks if a string is in a slice
+func contains(slice []string, item string) bool {
+	for _, s := range slice {
+		if s == item {
+			return true
+		}
+	}
+	return false
+}

docs/DOMAINS_DRAWDB.md

@@ -0,0 +1,149 @@
+# Domains and DrawDB Areas Integration
+
+## Overview
+
+Domains provide a way to organize tables from potentially multiple schemas into logical business groupings. When working with DrawDB format, domains are automatically imported/exported as **Subject Areas** - a native DrawDB feature for visually grouping tables.
+
+## How It Works
+
+### Writing Domains to DrawDB (Export)
+
+When you export a database with domains to DrawDB format:
+
+1. **Schema Areas** are created automatically for each schema (existing behavior)
+2. **Domain Areas** are created for each domain, calculated based on the positions of the tables they contain
+3. The domain area bounds are automatically calculated to encompass all its tables with a small padding
+
+```go
+// Example: Creating a domain and exporting to DrawDB
+db := models.InitDatabase("mydb")
+
+// Create an "authentication" domain
+authDomain := models.InitDomain("authentication")
+authDomain.Tables = append(authDomain.Tables,
+    models.InitDomainTable("users", "public"),
+    models.InitDomainTable("roles", "public"),
+    models.InitDomainTable("permissions", "public"),
+)
+db.Domains = append(db.Domains, authDomain)
+
+// Create a "financial" domain spanning multiple schemas
+finDomain := models.InitDomain("financial")
+finDomain.Tables = append(finDomain.Tables,
+    models.InitDomainTable("accounts", "public"),
+    models.InitDomainTable("transactions", "public"),
+    models.InitDomainTable("ledger", "finance"),  // Different schema!
+)
+db.Domains = append(db.Domains, finDomain)
+
+// Write to DrawDB - domains become subject areas
+writer := drawdb.NewWriter(&writers.WriterOptions{
+    OutputPath: "schema.json",
+})
+writer.WriteDatabase(db)
+```
+
+The resulting DrawDB JSON will have Subject Areas for both:
+- "authentication" area containing the auth tables
+- "financial" area containing the financial tables from both schemas
+
+### Reading Domains from DrawDB (Import)
+
+When you import a DrawDB file with Subject Areas:
+
+1. **Subject Areas** are automatically converted to **Domains**
+2. Tables are assigned to a domain if they fall within the area's visual bounds
+3. Table references include both the table name and schema name
+
+```go
+// Example: Reading DrawDB with areas
+reader := drawdb.NewReader(&readers.ReaderOptions{
+    FilePath: "schema.json",
+})
+
+db, err := reader.ReadDatabase()
+if err != nil {
+    log.Fatal(err)
+}
+
+// Access domains
+for _, domain := range db.Domains {
+    fmt.Printf("Domain: %s\n", domain.Name)
+    for _, domainTable := range domain.Tables {
+        fmt.Printf("  - %s.%s\n", domainTable.SchemaName, domainTable.TableName)
+        
+        // Access the actual table reference if loaded
+        if domainTable.RefTable != nil {
+            fmt.Printf("    Description: %s\n", domainTable.RefTable.Description)
+        }
+    }
+}
+```
+
+## Domain Structure
+
+```go
+type Domain struct {
+    Name        string         // Domain name (e.g., "authentication", "user_data")
+    Description string         // Optional human-readable description
+    Tables      []*DomainTable // Tables belonging to this domain
+    Comment     string         // Optional comment
+    Metadata    map[string]any // Extensible metadata
+    Sequence    uint           // Ordering hint
+}
+
+type DomainTable struct {
+    TableName  string // Table name
+    SchemaName string // Schema containing the table
+    Sequence   uint   // Ordering hint
+    RefTable   *Table // Pointer to actual table (in-memory only, not serialized)
+}
+```
+
+## Multi-Schema Domains
+
+One of the key features of domains is that they can span multiple schemas:
+
+```
+Domain: "user_data"
+├── public.users
+├── public.profiles
+├── public.user_preferences
+├── auth.user_sessions
+└── auth.mfa_devices
+```
+
+This allows you to organize related tables even when they're stored in different schemas.
+
+## Visual Organization in DrawDB
+
+When viewing the exported DrawDB file in DrawDB Editor:
+
+1. **Schema areas** appear in one color (original behavior)
+2. **Domain areas** appear in a different color
+3. Domain area bounds are calculated to fit all contained tables
+4. Areas can overlap - a table can visually belong to multiple areas
+
+## Integration with Other Formats
+
+Currently, domain/area integration is implemented for DrawDB format. 
+
+To implement similar functionality for other formats:
+
+1. Identify if the format has a native grouping/area feature
+2. Add conversion logic in the reader to map format areas → Domain model
+3. Add conversion logic in the writer to map Domain model → format areas
+
+Example formats that could support domains:
+- **DBML**: Could use DBML's `TableGroup` feature
+- **DrawDB**: ✅ Already implemented (Subject Areas)
+- **GraphQL**: Could use schema directives
+- **Custom formats**: Implement as needed
+
+## Tips and Best Practices
+
+1. **Keep domains focused**: Each domain should represent a distinct business area
+2. **Document purposes**: Use Description and Comment fields to explain each domain
+3. **Use meaningful names**: Domain names should clearly reflect their purpose
+4. **Maintain schema consistency**: Keep related tables together in the same schema when possible
+5. **Use metadata**: Store tool-specific information in the Metadata field

docs/TEMPLATE_MODE.md

@@ -44,12 +44,13 @@ The `--mode` flag controls how the template is executed:
 |------|-------------|--------|-------------|
 | `database` | Execute once for entire database | Single file | Documentation, reports, overview files |
 | `schema` | Execute once per schema | One file per schema | Schema-specific documentation |
+| `domain` | Execute once per domain | One file per domain | Domain-based documentation, domain exports |
 | `script` | Execute once per script | One file per script | Script processing |
 | `table` | Execute once per table | One file per table | Model generation, table docs |
 
 ### Filename Patterns
 
-For multi-file modes (`schema`, `script`, `table`), use `--filename-pattern` to control output filenames:
+For multi-file modes (`schema`, `domain`, `script`, `table`), use `--filename-pattern` to control output filenames:
 
 ```bash
 # Default pattern
@@ -296,6 +297,13 @@ The data available in templates depends on the execution mode:
 .Metadata          // map[string]interface{} - User metadata
 ```
 
+### Domain Mode
+```go
+.Domain            // *models.Domain - Current domain
+.ParentDatabase    // *models.Database - Parent database context
+.Metadata          // map[string]interface{} - User metadata
+```
+
 ### Table Mode
 ```go
 .Table             // *models.Table - Current table
@@ -317,6 +325,7 @@ The data available in templates depends on the execution mode:
 **Database:**
 - `.Name` - Database name
 - `.Schemas` - List of schemas
+- `.Domains` - List of domains (business domain groupings)
 - `.Description`, `.Comment` - Documentation
 
 **Schema:**
@@ -325,6 +334,17 @@ The data available in templates depends on the execution mode:
 - `.Views`, `.Sequences`, `.Scripts` - Other objects
 - `.Enums` - Enum types
 
+**Domain:**
+- `.Name` - Domain name
+- `.Tables` - List of DomainTable references
+- `.Description`, `.Comment` - Documentation
+- `.Metadata` - Custom metadata map
+
+**DomainTable:**
+- `.TableName` - Name of the table
+- `.SchemaName` - Schema containing the table
+- `.RefTable` - Pointer to actual Table object (if loaded)
+
 **Table:**
 - `.Name` - Table name
 - `.Schema` - Schema name

go.mod

@@ -3,8 +3,10 @@ module git.warky.dev/wdevs/relspecgo
 go 1.24.0
 
 require (
+	github.com/gdamore/tcell/v2 v2.8.1
 	github.com/google/uuid v1.6.0
 	github.com/jackc/pgx/v5 v5.7.6
+	github.com/rivo/tview v0.42.0
 	github.com/spf13/cobra v1.10.2
 	github.com/stretchr/testify v1.11.1
 	github.com/uptrace/bun v1.2.16
@@ -14,13 +16,17 @@ require (
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/gdamore/encoding v1.0.1 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
 	github.com/jinzhu/inflection v1.0.0 // indirect
 	github.com/kr/pretty v0.3.1 // indirect
+	github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
+	github.com/mattn/go-runewidth v0.0.16 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/puzpuzpuz/xsync/v3 v3.5.1 // indirect
+	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/rogpeppe/go-internal v1.14.1 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 	github.com/tmthrgd/go-hex v0.0.0-20190904060850-447a3041c3bc // indirect
@@ -28,4 +34,5 @@ require (
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
 	golang.org/x/crypto v0.41.0 // indirect
 	golang.org/x/sys v0.38.0 // indirect
+	golang.org/x/term v0.34.0 // indirect
 )

go.sum

@@ -3,6 +3,11 @@ github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ3
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/gdamore/encoding v1.0.1 h1:YzKZckdBL6jVt2Gc+5p82qhrGiqMdG/eNs6Wy0u3Uhw=
+github.com/gdamore/encoding v1.0.1/go.mod h1:0Z0cMFinngz9kS1QfMjCP8TY7em3bZYeeklsSDPivEo=
+github.com/gdamore/tcell/v2 v2.8.1 h1:KPNxyqclpWpWQlPLx6Xui1pMk8S+7+R37h3g07997NU=
+github.com/gdamore/tcell/v2 v2.8.1/go.mod h1:bj8ori1BG3OYMjmb3IklZVWfZUJ1UBQt9JXrOCOhGWw=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
@@ -21,11 +26,21 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
+github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
+github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
+github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
+github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
 github.com/pkg/diff v0.0.0-20210226163009-20ebb0f2a09e/go.mod h1:pJLUxLENpZxwdsKMEsNbx1VGcRFpLqf3715MtcvvzbA=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/puzpuzpuz/xsync/v3 v3.5.1 h1:GJYJZwO6IdxN/IKbneznS6yPkVC+c3zyY/j19c++5Fg=
 github.com/puzpuzpuz/xsync/v3 v3.5.1/go.mod h1:VjzYrABPabuM4KyBh1Ftq6u8nhwY5tBPKP9jpmh0nnA=
+github.com/rivo/tview v0.42.0 h1:b/ftp+RxtDsHSaynXTbJb+/n/BxDEi+W3UfF5jILK6c=
+github.com/rivo/tview v0.42.0/go.mod h1:cSfIYfhpSGCjp3r/ECJb+GKS7cGJnqV8vfjQPwoXyfY=
+github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
+github.com/rivo/uniseg v0.4.3/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
+github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
+github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/rogpeppe/go-internal v1.14.1 h1:UQB4HGPB6osV0SQTLymcB4TgvyWu6ZyliaW0tI/otEQ=
 github.com/rogpeppe/go-internal v1.14.1/go.mod h1:MaRKkUm5W0goXpeCfT7UZI6fk/L7L7so1lCWt35ZSgc=
@@ -48,15 +63,79 @@ github.com/vmihailenco/msgpack/v5 v5.4.1 h1:cQriyiUvjTwOHg8QZaPihLWeRAAVoCpE00IU
 github.com/vmihailenco/msgpack/v5 v5.4.1/go.mod h1:GaZTsDaehaPpQVyxrf5mtQlH+pc21PIudVV/E3rRQok=
 github.com/vmihailenco/tagparser/v2 v2.0.0 h1:y09buUbR+b5aycVFQs/g70pqKVZNBmxwAhO7/IwNM9g=
 github.com/vmihailenco/tagparser/v2 v2.0.0/go.mod h1:Wri+At7QHww0WTrCBeu4J6bNtoV6mEfg5OIWRZA9qds=
+github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
 go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
+golang.org/x/crypto v0.13.0/go.mod h1:y6Z2r+Rw4iayiXXAIxJIDAJ1zMW4yaTpebo8fPOliYc=
+golang.org/x/crypto v0.19.0/go.mod h1:Iy9bg/ha4yyC70EfRS8jz+B6ybOBKMaSxLj6P6oBDfU=
+golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
 golang.org/x/crypto v0.41.0 h1:WKYxWedPGCTVVl5+WHSSrOBT0O8lx32+zxmHxijgXp4=
 golang.org/x/crypto v0.41.0/go.mod h1:pO5AFd7FA68rFak7rOAGVuygIISepHftHnr8dr6+sUc=
+golang.org/x/mod v0.6.0-dev.0.20220419223038-86c51ed26bb4/go.mod h1:jJ57K6gSWd91VN4djpZkiMVwK6gcyfeH4XE8wZrZaV4=
+golang.org/x/mod v0.8.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.12.0/go.mod h1:iBbtSCu2XBx23ZKBPSOrRkjjQPZFPuis4dIYUhu/chs=
+golang.org/x/mod v0.15.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/mod v0.17.0/go.mod h1:hTbmBsO62+eylJbnUtE2MGJUyE7QWk4xUqPFrRgJ+7c=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
+golang.org/x/net v0.0.0-20220722155237-a158d28d115b/go.mod h1:XRhObCWvk6IyKnWLug+ECip1KBveYUHfp+8e9klMJ9c=
+golang.org/x/net v0.6.0/go.mod h1:2Tu9+aMcznHK/AK1HMvgo6xiTLG5rD5rZLDS+rp2Bjs=
+golang.org/x/net v0.10.0/go.mod h1:0qNGK6F8kojg2nk9dLZ2mShWaEBan6FAoqfSigmmuDg=
+golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
+golang.org/x/net v0.21.0/go.mod h1:bIjVDfnllIU7BJ2DNgfnXvpSvtn8VRwhlsaeUTyUS44=
+golang.org/x/net v0.25.0/go.mod h1:JkAGAh7GEvH74S6FOH42FLoXpXbE/aqXSrIQjXgsiwM=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.1.0/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.7.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
 golang.org/x/sync v0.16.0 h1:ycBJEhp9p4vXvUZNszeOq0kGTPghopOL8q0fq3vstxw=
 golang.org/x/sync v0.16.0/go.mod h1:1dzgHSNfp02xaA81J2MS99Qcpr2w7fw1gpm99rleRqA=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
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pkg/merge/merge.go

@@ -0,0 +1,574 @@
+// Package merge provides utilities for merging database schemas.
+// It allows combining schemas from multiple sources while avoiding duplicates,
+// supporting only additive operations (no deletion or modification of existing items).
+package merge
+
+import (
+	"fmt"
+	"strings"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// MergeResult represents the result of a merge operation
+type MergeResult struct {
+	SchemasAdded   int
+	TablesAdded    int
+	ColumnsAdded   int
+	RelationsAdded int
+	DomainsAdded   int
+	EnumsAdded     int
+	ViewsAdded     int
+	SequencesAdded int
+}
+
+// MergeOptions contains options for merge operations
+type MergeOptions struct {
+	SkipDomains    bool
+	SkipRelations  bool
+	SkipEnums      bool
+	SkipViews      bool
+	SkipSequences  bool
+	SkipTableNames map[string]bool // Tables to skip during merge (keyed by table name)
+}
+
+// MergeDatabases merges the source database into the target database.
+// Only adds missing items; existing items are not modified.
+func MergeDatabases(target, source *models.Database, opts *MergeOptions) *MergeResult {
+	if opts == nil {
+		opts = &MergeOptions{}
+	}
+
+	result := &MergeResult{}
+
+	if target == nil || source == nil {
+		return result
+	}
+
+	// Merge schemas and their contents
+	result.merge(target, source, opts)
+
+	return result
+}
+
+func (r *MergeResult) merge(target, source *models.Database, opts *MergeOptions) {
+	// Create maps of existing schemas for quick lookup
+	existingSchemas := make(map[string]*models.Schema)
+	for _, schema := range target.Schemas {
+		existingSchemas[schema.SQLName()] = schema
+	}
+
+	// Merge schemas
+	for _, srcSchema := range source.Schemas {
+		schemaName := srcSchema.SQLName()
+		if tgtSchema, exists := existingSchemas[schemaName]; exists {
+			// Schema exists, merge its contents
+			r.mergeSchemaContents(tgtSchema, srcSchema, opts)
+		} else {
+			// Schema doesn't exist, add it
+			newSchema := cloneSchema(srcSchema)
+			target.Schemas = append(target.Schemas, newSchema)
+			r.SchemasAdded++
+		}
+	}
+
+	// Merge domains if not skipped
+	if !opts.SkipDomains {
+		r.mergeDomains(target, source)
+	}
+}
+
+func (r *MergeResult) mergeSchemaContents(target, source *models.Schema, opts *MergeOptions) {
+	// Merge tables
+	r.mergeTables(target, source, opts)
+
+	// Merge views if not skipped
+	if !opts.SkipViews {
+		r.mergeViews(target, source)
+	}
+
+	// Merge sequences if not skipped
+	if !opts.SkipSequences {
+		r.mergeSequences(target, source)
+	}
+
+	// Merge enums if not skipped
+	if !opts.SkipEnums {
+		r.mergeEnums(target, source)
+	}
+
+	// Merge relations if not skipped
+	if !opts.SkipRelations {
+		r.mergeRelations(target, source)
+	}
+}
+
+func (r *MergeResult) mergeTables(schema *models.Schema, source *models.Schema, opts *MergeOptions) {
+	// Create map of existing tables
+	existingTables := make(map[string]*models.Table)
+	for _, table := range schema.Tables {
+		existingTables[table.SQLName()] = table
+	}
+
+	// Merge tables
+	for _, srcTable := range source.Tables {
+		tableName := srcTable.SQLName()
+
+		// Skip if table is in the skip list (case-insensitive)
+		if opts != nil && opts.SkipTableNames != nil && opts.SkipTableNames[strings.ToLower(tableName)] {
+			continue
+		}
+
+		if tgtTable, exists := existingTables[tableName]; exists {
+			// Table exists, merge its columns
+			r.mergeColumns(tgtTable, srcTable)
+		} else {
+			// Table doesn't exist, add it
+			newTable := cloneTable(srcTable)
+			schema.Tables = append(schema.Tables, newTable)
+			r.TablesAdded++
+			// Count columns in the newly added table
+			r.ColumnsAdded += len(newTable.Columns)
+		}
+	}
+}
+
+func (r *MergeResult) mergeColumns(table *models.Table, srcTable *models.Table) {
+	// Create map of existing columns
+	existingColumns := make(map[string]*models.Column)
+	for colName := range table.Columns {
+		existingColumns[colName] = table.Columns[colName]
+	}
+
+	// Merge columns
+	for colName, srcCol := range srcTable.Columns {
+		if _, exists := existingColumns[colName]; !exists {
+			// Column doesn't exist, add it
+			newCol := cloneColumn(srcCol)
+			table.Columns[colName] = newCol
+			r.ColumnsAdded++
+		}
+	}
+}
+
+func (r *MergeResult) mergeViews(schema *models.Schema, source *models.Schema) {
+	// Create map of existing views
+	existingViews := make(map[string]*models.View)
+	for _, view := range schema.Views {
+		existingViews[view.SQLName()] = view
+	}
+
+	// Merge views
+	for _, srcView := range source.Views {
+		viewName := srcView.SQLName()
+		if _, exists := existingViews[viewName]; !exists {
+			// View doesn't exist, add it
+			newView := cloneView(srcView)
+			schema.Views = append(schema.Views, newView)
+			r.ViewsAdded++
+		}
+	}
+}
+
+func (r *MergeResult) mergeSequences(schema *models.Schema, source *models.Schema) {
+	// Create map of existing sequences
+	existingSequences := make(map[string]*models.Sequence)
+	for _, seq := range schema.Sequences {
+		existingSequences[seq.SQLName()] = seq
+	}
+
+	// Merge sequences
+	for _, srcSeq := range source.Sequences {
+		seqName := srcSeq.SQLName()
+		if _, exists := existingSequences[seqName]; !exists {
+			// Sequence doesn't exist, add it
+			newSeq := cloneSequence(srcSeq)
+			schema.Sequences = append(schema.Sequences, newSeq)
+			r.SequencesAdded++
+		}
+	}
+}
+
+func (r *MergeResult) mergeEnums(schema *models.Schema, source *models.Schema) {
+	// Create map of existing enums
+	existingEnums := make(map[string]*models.Enum)
+	for _, enum := range schema.Enums {
+		existingEnums[enum.SQLName()] = enum
+	}
+
+	// Merge enums
+	for _, srcEnum := range source.Enums {
+		enumName := srcEnum.SQLName()
+		if _, exists := existingEnums[enumName]; !exists {
+			// Enum doesn't exist, add it
+			newEnum := cloneEnum(srcEnum)
+			schema.Enums = append(schema.Enums, newEnum)
+			r.EnumsAdded++
+		}
+	}
+}
+
+func (r *MergeResult) mergeRelations(schema *models.Schema, source *models.Schema) {
+	// Create map of existing relations
+	existingRelations := make(map[string]*models.Relationship)
+	for _, rel := range schema.Relations {
+		existingRelations[rel.SQLName()] = rel
+	}
+
+	// Merge relations
+	for _, srcRel := range source.Relations {
+		if _, exists := existingRelations[srcRel.SQLName()]; !exists {
+			// Relation doesn't exist, add it
+			newRel := cloneRelation(srcRel)
+			schema.Relations = append(schema.Relations, newRel)
+			r.RelationsAdded++
+		}
+	}
+}
+
+func (r *MergeResult) mergeDomains(target *models.Database, source *models.Database) {
+	// Create map of existing domains
+	existingDomains := make(map[string]*models.Domain)
+	for _, domain := range target.Domains {
+		existingDomains[domain.SQLName()] = domain
+	}
+
+	// Merge domains
+	for _, srcDomain := range source.Domains {
+		domainName := srcDomain.SQLName()
+		if _, exists := existingDomains[domainName]; !exists {
+			// Domain doesn't exist, add it
+			newDomain := cloneDomain(srcDomain)
+			target.Domains = append(target.Domains, newDomain)
+			r.DomainsAdded++
+		}
+	}
+}
+
+// Clone functions to create deep copies of models
+
+func cloneSchema(schema *models.Schema) *models.Schema {
+	if schema == nil {
+		return nil
+	}
+	newSchema := &models.Schema{
+		Name:        schema.Name,
+		Description: schema.Description,
+		Owner:       schema.Owner,
+		Comment:     schema.Comment,
+		Sequence:    schema.Sequence,
+		UpdatedAt:   schema.UpdatedAt,
+		Tables:      make([]*models.Table, 0),
+		Views:       make([]*models.View, 0),
+		Sequences:   make([]*models.Sequence, 0),
+		Enums:       make([]*models.Enum, 0),
+		Relations:   make([]*models.Relationship, 0),
+	}
+
+	if schema.Permissions != nil {
+		newSchema.Permissions = make(map[string]string)
+		for k, v := range schema.Permissions {
+			newSchema.Permissions[k] = v
+		}
+	}
+
+	if schema.Metadata != nil {
+		newSchema.Metadata = make(map[string]interface{})
+		for k, v := range schema.Metadata {
+			newSchema.Metadata[k] = v
+		}
+	}
+
+	if schema.Scripts != nil {
+		newSchema.Scripts = make([]*models.Script, len(schema.Scripts))
+		copy(newSchema.Scripts, schema.Scripts)
+	}
+
+	// Clone tables
+	for _, table := range schema.Tables {
+		newSchema.Tables = append(newSchema.Tables, cloneTable(table))
+	}
+
+	// Clone views
+	for _, view := range schema.Views {
+		newSchema.Views = append(newSchema.Views, cloneView(view))
+	}
+
+	// Clone sequences
+	for _, seq := range schema.Sequences {
+		newSchema.Sequences = append(newSchema.Sequences, cloneSequence(seq))
+	}
+
+	// Clone enums
+	for _, enum := range schema.Enums {
+		newSchema.Enums = append(newSchema.Enums, cloneEnum(enum))
+	}
+
+	// Clone relations
+	for _, rel := range schema.Relations {
+		newSchema.Relations = append(newSchema.Relations, cloneRelation(rel))
+	}
+
+	return newSchema
+}
+
+func cloneTable(table *models.Table) *models.Table {
+	if table == nil {
+		return nil
+	}
+	newTable := &models.Table{
+		Name:        table.Name,
+		Description: table.Description,
+		Schema:      table.Schema,
+		Comment:     table.Comment,
+		Sequence:    table.Sequence,
+		UpdatedAt:   table.UpdatedAt,
+		Columns:     make(map[string]*models.Column),
+		Constraints: make(map[string]*models.Constraint),
+		Indexes:     make(map[string]*models.Index),
+	}
+
+	if table.Metadata != nil {
+		newTable.Metadata = make(map[string]interface{})
+		for k, v := range table.Metadata {
+			newTable.Metadata[k] = v
+		}
+	}
+
+	// Clone columns
+	for colName, col := range table.Columns {
+		newTable.Columns[colName] = cloneColumn(col)
+	}
+
+	// Clone constraints
+	for constName, constraint := range table.Constraints {
+		newTable.Constraints[constName] = cloneConstraint(constraint)
+	}
+
+	// Clone indexes
+	for idxName, index := range table.Indexes {
+		newTable.Indexes[idxName] = cloneIndex(index)
+	}
+
+	return newTable
+}
+
+func cloneColumn(col *models.Column) *models.Column {
+	if col == nil {
+		return nil
+	}
+	newCol := &models.Column{
+		Name:          col.Name,
+		Type:          col.Type,
+		Description:   col.Description,
+		Comment:       col.Comment,
+		IsPrimaryKey:  col.IsPrimaryKey,
+		NotNull:       col.NotNull,
+		Default:       col.Default,
+		Precision:     col.Precision,
+		Scale:         col.Scale,
+		Length:        col.Length,
+		Sequence:      col.Sequence,
+		AutoIncrement: col.AutoIncrement,
+		Collation:     col.Collation,
+	}
+
+	return newCol
+}
+
+func cloneConstraint(constraint *models.Constraint) *models.Constraint {
+	if constraint == nil {
+		return nil
+	}
+	newConstraint := &models.Constraint{
+		Type:              constraint.Type,
+		Columns:           make([]string, len(constraint.Columns)),
+		ReferencedTable:   constraint.ReferencedTable,
+		ReferencedSchema:  constraint.ReferencedSchema,
+		ReferencedColumns: make([]string, len(constraint.ReferencedColumns)),
+		OnUpdate:          constraint.OnUpdate,
+		OnDelete:          constraint.OnDelete,
+		Expression:        constraint.Expression,
+		Name:              constraint.Name,
+		Deferrable:        constraint.Deferrable,
+		InitiallyDeferred: constraint.InitiallyDeferred,
+		Sequence:          constraint.Sequence,
+	}
+	copy(newConstraint.Columns, constraint.Columns)
+	copy(newConstraint.ReferencedColumns, constraint.ReferencedColumns)
+	return newConstraint
+}
+
+func cloneIndex(index *models.Index) *models.Index {
+	if index == nil {
+		return nil
+	}
+	newIndex := &models.Index{
+		Name:        index.Name,
+		Description: index.Description,
+		Table:       index.Table,
+		Schema:      index.Schema,
+		Columns:     make([]string, len(index.Columns)),
+		Unique:      index.Unique,
+		Type:        index.Type,
+		Where:       index.Where,
+		Concurrent:  index.Concurrent,
+		Include:     make([]string, len(index.Include)),
+		Comment:     index.Comment,
+		Sequence:    index.Sequence,
+	}
+	copy(newIndex.Columns, index.Columns)
+	copy(newIndex.Include, index.Include)
+	return newIndex
+}
+
+func cloneView(view *models.View) *models.View {
+	if view == nil {
+		return nil
+	}
+	newView := &models.View{
+		Name:        view.Name,
+		Description: view.Description,
+		Schema:      view.Schema,
+		Definition:  view.Definition,
+		Comment:     view.Comment,
+		Sequence:    view.Sequence,
+		Columns:     make(map[string]*models.Column),
+	}
+
+	if view.Metadata != nil {
+		newView.Metadata = make(map[string]interface{})
+		for k, v := range view.Metadata {
+			newView.Metadata[k] = v
+		}
+	}
+
+	// Clone columns
+	for colName, col := range view.Columns {
+		newView.Columns[colName] = cloneColumn(col)
+	}
+
+	return newView
+}
+
+func cloneSequence(seq *models.Sequence) *models.Sequence {
+	if seq == nil {
+		return nil
+	}
+	newSeq := &models.Sequence{
+		Name:          seq.Name,
+		Description:   seq.Description,
+		Schema:        seq.Schema,
+		StartValue:    seq.StartValue,
+		MinValue:      seq.MinValue,
+		MaxValue:      seq.MaxValue,
+		IncrementBy:   seq.IncrementBy,
+		CacheSize:     seq.CacheSize,
+		Cycle:         seq.Cycle,
+		OwnedByTable:  seq.OwnedByTable,
+		OwnedByColumn: seq.OwnedByColumn,
+		Comment:       seq.Comment,
+		Sequence:      seq.Sequence,
+	}
+	return newSeq
+}
+
+func cloneEnum(enum *models.Enum) *models.Enum {
+	if enum == nil {
+		return nil
+	}
+	newEnum := &models.Enum{
+		Name:   enum.Name,
+		Values: make([]string, len(enum.Values)),
+		Schema: enum.Schema,
+	}
+	copy(newEnum.Values, enum.Values)
+	return newEnum
+}
+
+func cloneRelation(rel *models.Relationship) *models.Relationship {
+	if rel == nil {
+		return nil
+	}
+	newRel := &models.Relationship{
+		Name:          rel.Name,
+		Type:          rel.Type,
+		FromTable:     rel.FromTable,
+		FromSchema:    rel.FromSchema,
+		FromColumns:   make([]string, len(rel.FromColumns)),
+		ToTable:       rel.ToTable,
+		ToSchema:      rel.ToSchema,
+		ToColumns:     make([]string, len(rel.ToColumns)),
+		ForeignKey:    rel.ForeignKey,
+		ThroughTable:  rel.ThroughTable,
+		ThroughSchema: rel.ThroughSchema,
+		Description:   rel.Description,
+		Sequence:      rel.Sequence,
+	}
+
+	if rel.Properties != nil {
+		newRel.Properties = make(map[string]string)
+		for k, v := range rel.Properties {
+			newRel.Properties[k] = v
+		}
+	}
+
+	copy(newRel.FromColumns, rel.FromColumns)
+	copy(newRel.ToColumns, rel.ToColumns)
+	return newRel
+}
+
+func cloneDomain(domain *models.Domain) *models.Domain {
+	if domain == nil {
+		return nil
+	}
+	newDomain := &models.Domain{
+		Name:        domain.Name,
+		Description: domain.Description,
+		Comment:     domain.Comment,
+		Sequence:    domain.Sequence,
+		Tables:      make([]*models.DomainTable, len(domain.Tables)),
+	}
+
+	if domain.Metadata != nil {
+		newDomain.Metadata = make(map[string]interface{})
+		for k, v := range domain.Metadata {
+			newDomain.Metadata[k] = v
+		}
+	}
+
+	copy(newDomain.Tables, domain.Tables)
+	return newDomain
+}
+
+// GetMergeSummary returns a human-readable summary of the merge result
+func GetMergeSummary(result *MergeResult) string {
+	if result == nil {
+		return "No merge result available"
+	}
+
+	lines := []string{
+		"=== Merge Summary ===",
+		fmt.Sprintf("Schemas added:     %d", result.SchemasAdded),
+		fmt.Sprintf("Tables added:      %d", result.TablesAdded),
+		fmt.Sprintf("Columns added:     %d", result.ColumnsAdded),
+		fmt.Sprintf("Views added:       %d", result.ViewsAdded),
+		fmt.Sprintf("Sequences added:   %d", result.SequencesAdded),
+		fmt.Sprintf("Enums added:       %d", result.EnumsAdded),
+		fmt.Sprintf("Relations added:   %d", result.RelationsAdded),
+		fmt.Sprintf("Domains added:     %d", result.DomainsAdded),
+	}
+
+	totalAdded := result.SchemasAdded + result.TablesAdded + result.ColumnsAdded +
+		result.ViewsAdded + result.SequencesAdded + result.EnumsAdded +
+		result.RelationsAdded + result.DomainsAdded
+
+	lines = append(lines, fmt.Sprintf("Total items added: %d", totalAdded))
+
+	summary := ""
+	for _, line := range lines {
+		summary += line + "\n"
+	}
+
+	return summary
+}

pkg/models/models.go

@@ -4,7 +4,12 @@
 // intermediate representation for converting between various database schema formats.
 package models
 
-import "strings"
+import (
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+)
 
 // DatabaseType represents the type of database system.
 type DatabaseType string
@@ -21,10 +26,13 @@ type Database struct {
 	Name            string       `json:"name" yaml:"name"`
 	Description     string       `json:"description,omitempty" yaml:"description,omitempty" xml:"description,omitempty"`
 	Schemas         []*Schema    `json:"schemas" yaml:"schemas" xml:"schemas"`
+	Domains         []*Domain    `json:"domains,omitempty" yaml:"domains,omitempty" xml:"domains,omitempty"`
 	Comment         string       `json:"comment,omitempty" yaml:"comment,omitempty" xml:"comment,omitempty"`
 	DatabaseType    DatabaseType `json:"database_type,omitempty" yaml:"database_type,omitempty" xml:"database_type,omitempty"`
 	DatabaseVersion string       `json:"database_version,omitempty" yaml:"database_version,omitempty" xml:"database_version,omitempty"`
 	SourceFormat    string       `json:"source_format,omitempty" yaml:"source_format,omitempty" xml:"source_format,omitempty"` // Source Format of the database.
+	UpdatedAt       string       `json:"updatedat,omitempty" yaml:"updatedat,omitempty" xml:"updatedat,omitempty"`
+	GUID            string       `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the database name in lowercase for SQL compatibility.
@@ -32,6 +40,39 @@ func (d *Database) SQLName() string {
 	return strings.ToLower(d.Name)
 }
 
+// UpdateDate sets the UpdatedAt field to the current time in RFC3339 format.
+func (d *Database) UpdateDate() {
+	d.UpdatedAt = time.Now().Format(time.RFC3339)
+}
+
+// Domain represents a logical business domain grouping multiple tables from potentially different schemas.
+// Domains allow for organizing database tables by functional areas (e.g., authentication, user data, financial).
+type Domain struct {
+	Name        string         `json:"name" yaml:"name" xml:"name"`
+	Description string         `json:"description,omitempty" yaml:"description,omitempty" xml:"description,omitempty"`
+	Tables      []*DomainTable `json:"tables" yaml:"tables" xml:"tables"`
+	Comment     string         `json:"comment,omitempty" yaml:"comment,omitempty" xml:"comment,omitempty"`
+	Metadata    map[string]any `json:"metadata,omitempty" yaml:"metadata,omitempty" xml:"-"`
+	Sequence    uint           `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	GUID        string         `json:"guid" yaml:"guid" xml:"guid"`
+}
+
+// SQLName returns the domain name in lowercase for SQL compatibility.
+func (d *Domain) SQLName() string {
+	return strings.ToLower(d.Name)
+}
+
+// DomainTable represents a reference to a specific table within a domain.
+// It identifies the table by name and schema, allowing a single domain to include
+// tables from multiple schemas.
+type DomainTable struct {
+	TableName  string `json:"table_name" yaml:"table_name" xml:"table_name"`
+	SchemaName string `json:"schema_name" yaml:"schema_name" xml:"schema_name"`
+	Sequence   uint   `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	RefTable   *Table `json:"-" yaml:"-" xml:"-"` // Excluded to prevent circular references
+	GUID       string `json:"guid" yaml:"guid" xml:"guid"`
+}
+
 // Schema represents a database schema, which is a logical grouping of database objects
 // such as tables, views, sequences, and relationships within a database.
 type Schema struct {
@@ -49,6 +90,16 @@ type Schema struct {
 	RefDatabase *Database         `json:"-" yaml:"-" xml:"-"` // Excluded to prevent circular references
 	Relations   []*Relationship   `json:"relations,omitempty" yaml:"relations,omitempty" xml:"-"`
 	Enums       []*Enum           `json:"enums,omitempty" yaml:"enums,omitempty" xml:"enums"`
+	UpdatedAt   string            `json:"updatedat,omitempty" yaml:"updatedat,omitempty" xml:"updatedat,omitempty"`
+	GUID        string            `json:"guid" yaml:"guid" xml:"guid"`
+}
+
+// UpdaUpdateDateted sets the UpdatedAt field to the current time in RFC3339 format.
+func (d *Schema) UpdateDate() {
+	d.UpdatedAt = time.Now().Format(time.RFC3339)
+	if d.RefDatabase != nil {
+		d.RefDatabase.UpdateDate()
+	}
 }
 
 // SQLName returns the schema name in lowercase for SQL compatibility.
@@ -71,6 +122,16 @@ type Table struct {
 	Metadata      map[string]any           `json:"metadata,omitempty" yaml:"metadata,omitempty" xml:"-"`
 	Sequence      uint                     `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
 	RefSchema     *Schema                  `json:"-" yaml:"-" xml:"-"` // Excluded to prevent circular references
+	UpdatedAt     string                   `json:"updatedat,omitempty" yaml:"updatedat,omitempty" xml:"updatedat,omitempty"`
+	GUID          string                   `json:"guid" yaml:"guid" xml:"guid"`
+}
+
+// UpdateDate sets the UpdatedAt field to the current time in RFC3339 format.
+func (d *Table) UpdateDate() {
+	d.UpdatedAt = time.Now().Format(time.RFC3339)
+	if d.RefSchema != nil {
+		d.RefSchema.UpdateDate()
+	}
 }
 
 // SQLName returns the table name in lowercase for SQL compatibility.
@@ -111,6 +172,7 @@ type View struct {
 	Metadata    map[string]any     `json:"metadata,omitempty" yaml:"metadata,omitempty" xml:"-"`
 	Sequence    uint               `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
 	RefSchema   *Schema            `json:"-" yaml:"-" xml:"-"` // Excluded to prevent circular references
+	GUID        string             `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the view name in lowercase for SQL compatibility.
@@ -134,6 +196,7 @@ type Sequence struct {
 	Comment       string  `json:"comment,omitempty" yaml:"comment,omitempty" xml:"comment,omitempty"`
 	Sequence      uint    `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
 	RefSchema     *Schema `json:"-" yaml:"-" xml:"-"` // Excluded to prevent circular references
+	GUID          string  `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the sequence name in lowercase for SQL compatibility.
@@ -158,6 +221,7 @@ type Column struct {
 	Comment       string `json:"comment,omitempty" yaml:"comment,omitempty" xml:"comment,omitempty"`
 	Collation     string `json:"collation,omitempty" yaml:"collation,omitempty" xml:"collation,omitempty"`
 	Sequence      uint   `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	GUID          string `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the column name in lowercase for SQL compatibility.
@@ -180,6 +244,7 @@ type Index struct {
 	Include     []string `json:"include,omitempty" yaml:"include,omitempty" xml:"include,omitempty"` // INCLUDE columns
 	Comment     string   `json:"comment,omitempty" yaml:"comment,omitempty" xml:"comment,omitempty"`
 	Sequence    uint     `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	GUID        string   `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the index name in lowercase for SQL compatibility.
@@ -214,6 +279,7 @@ type Relationship struct {
 	ThroughSchema string            `json:"through_schema,omitempty" yaml:"through_schema,omitempty" xml:"through_schema,omitempty"`
 	Description   string            `json:"description,omitempty" yaml:"description,omitempty" xml:"description,omitempty"`
 	Sequence      uint              `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	GUID          string            `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the relationship name in lowercase for SQL compatibility.
@@ -238,6 +304,7 @@ type Constraint struct {
 	Deferrable        bool           `json:"deferrable,omitempty" yaml:"deferrable,omitempty" xml:"deferrable,omitempty"`
 	InitiallyDeferred bool           `json:"initially_deferred,omitempty" yaml:"initially_deferred,omitempty" xml:"initially_deferred,omitempty"`
 	Sequence          uint           `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	GUID              string         `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the constraint name in lowercase for SQL compatibility.
@@ -253,6 +320,7 @@ type Enum struct {
 	Name   string   `json:"name" yaml:"name" xml:"name"`
 	Values []string `json:"values" yaml:"values" xml:"values"`
 	Schema string   `json:"schema,omitempty" yaml:"schema,omitempty" xml:"schema,omitempty"`
+	GUID   string   `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the enum name in lowercase for SQL compatibility.
@@ -260,6 +328,16 @@ func (d *Enum) SQLName() string {
 	return strings.ToLower(d.Name)
 }
 
+// InitEnum initializes a new Enum with empty values slice
+func InitEnum(name, schema string) *Enum {
+	return &Enum{
+		Name:   name,
+		Schema: schema,
+		Values: make([]string, 0),
+		GUID:   uuid.New().String(),
+	}
+}
+
 // Supported constraint types.
 const (
 	PrimaryKeyConstraint ConstraintType = "primary_key" // Primary key uniquely identifies each record
@@ -281,6 +359,7 @@ type Script struct {
 	Version     string   `json:"version,omitempty" yaml:"version,omitempty" xml:"version,omitempty"`
 	Priority    int      `json:"priority,omitempty" yaml:"priority,omitempty" xml:"priority,omitempty"`
 	Sequence    uint     `json:"sequence,omitempty" yaml:"sequence,omitempty" xml:"sequence,omitempty"`
+	GUID        string   `json:"guid" yaml:"guid" xml:"guid"`
 }
 
 // SQLName returns the script name in lowercase for SQL compatibility.
@@ -295,6 +374,8 @@ func InitDatabase(name string) *Database {
 	return &Database{
 		Name:    name,
 		Schemas: make([]*Schema, 0),
+		Domains: make([]*Domain, 0),
+		GUID:    uuid.New().String(),
 	}
 }
 
@@ -308,6 +389,7 @@ func InitSchema(name string) *Schema {
 		Permissions: make(map[string]string),
 		Metadata:    make(map[string]any),
 		Scripts:     make([]*Script, 0),
+		GUID:        uuid.New().String(),
 	}
 }
 
@@ -321,6 +403,7 @@ func InitTable(name, schema string) *Table {
 		Indexes:       make(map[string]*Index),
 		Relationships: make(map[string]*Relationship),
 		Metadata:      make(map[string]any),
+		GUID:          uuid.New().String(),
 	}
 }
 
@@ -330,6 +413,7 @@ func InitColumn(name, table, schema string) *Column {
 		Name:   name,
 		Table:  table,
 		Schema: schema,
+		GUID:   uuid.New().String(),
 	}
 }
 
@@ -341,6 +425,7 @@ func InitIndex(name, table, schema string) *Index {
 		Schema:  schema,
 		Columns: make([]string, 0),
 		Include: make([]string, 0),
+		GUID:    uuid.New().String(),
 	}
 }
 
@@ -353,6 +438,7 @@ func InitRelation(name, schema string) *Relationship {
 		Properties:  make(map[string]string),
 		FromColumns: make([]string, 0),
 		ToColumns:   make([]string, 0),
+		GUID:        uuid.New().String(),
 	}
 }
 
@@ -362,6 +448,7 @@ func InitRelationship(name string, relType RelationType) *Relationship {
 		Name:       name,
 		Type:       relType,
 		Properties: make(map[string]string),
+		GUID:       uuid.New().String(),
 	}
 }
 
@@ -372,6 +459,7 @@ func InitConstraint(name string, constraintType ConstraintType) *Constraint {
 		Type:              constraintType,
 		Columns:           make([]string, 0),
 		ReferencedColumns: make([]string, 0),
+		GUID:              uuid.New().String(),
 	}
 }
 
@@ -380,6 +468,7 @@ func InitScript(name string) *Script {
 	return &Script{
 		Name:     name,
 		RunAfter: make([]string, 0),
+		GUID:     uuid.New().String(),
 	}
 }
 
@@ -390,6 +479,7 @@ func InitView(name, schema string) *View {
 		Schema:   schema,
 		Columns:  make(map[string]*Column),
 		Metadata: make(map[string]any),
+		GUID:     uuid.New().String(),
 	}
 }
 
@@ -400,5 +490,25 @@ func InitSequence(name, schema string) *Sequence {
 		Schema:      schema,
 		IncrementBy: 1,
 		StartValue:  1,
+		GUID:        uuid.New().String(),
+	}
+}
+
+// InitDomain initializes a new Domain with empty slices and maps
+func InitDomain(name string) *Domain {
+	return &Domain{
+		Name:     name,
+		Tables:   make([]*DomainTable, 0),
+		Metadata: make(map[string]any),
+		GUID:     uuid.New().String(),
+	}
+}
+
+// InitDomainTable initializes a new DomainTable reference
+func InitDomainTable(tableName, schemaName string) *DomainTable {
+	return &DomainTable{
+		TableName:  tableName,
+		SchemaName: schemaName,
+		GUID:       uuid.New().String(),
 	}
 }

pkg/readers/bun/reader.go

@@ -632,6 +632,9 @@ func (r *Reader) parseColumn(fieldName string, fieldType ast.Expr, tag string, s
 		column.Name = parts[0]
 	}
 
+	// Track if we found explicit nullability markers
+	hasExplicitNullableMarker := false
+
 	// Parse tag attributes
 	for _, part := range parts[1:] {
 		kv := strings.SplitN(part, ":", 2)
@@ -649,6 +652,10 @@ func (r *Reader) parseColumn(fieldName string, fieldType ast.Expr, tag string, s
 			column.IsPrimaryKey = true
 		case "notnull":
 			column.NotNull = true
+			hasExplicitNullableMarker = true
+		case "nullzero":
+			column.NotNull = false
+			hasExplicitNullableMarker = true
 		case "autoincrement":
 			column.AutoIncrement = true
 		case "default":
@@ -664,17 +671,15 @@ func (r *Reader) parseColumn(fieldName string, fieldType ast.Expr, tag string, s
 
 	// Determine if nullable based on Go type and bun tags
 	// In Bun:
-	// - nullzero tag means the field is nullable (can be NULL in DB)
+	// - explicit "notnull" tag means NOT NULL
-	// - absence of nullzero means the field is NOT NULL
+	// - explicit "nullzero" tag means nullable
-	// - primitive types (int64, bool, string) are NOT NULL by default
+	// - absence of explicit markers: infer from Go type
-	column.NotNull = true
+	if !hasExplicitNullableMarker {
-	// Primary keys are always NOT NULL
+		// Infer from Go type if no explicit marker found
-
-	if strings.Contains(bunTag, "nullzero") {
-		column.NotNull = false
-	} else {
 		column.NotNull = !r.isNullableGoType(fieldType)
 	}
+
+	// Primary keys are always NOT NULL
 	if column.IsPrimaryKey {
 		column.NotNull = true
 	}

pkg/readers/dbml/reader.go

@@ -4,7 +4,9 @@ import (
 	"bufio"
 	"fmt"
 	"os"
+	"path/filepath"
 	"regexp"
+	"sort"
 	"strings"
 
 	"git.warky.dev/wdevs/relspecgo/pkg/models"
@@ -24,11 +26,23 @@ func NewReader(options *readers.ReaderOptions) *Reader {
 }
 
 // ReadDatabase reads and parses DBML input, returning a Database model
+// If FilePath points to a directory, all .dbml files are loaded and merged
 func (r *Reader) ReadDatabase() (*models.Database, error) {
 	if r.options.FilePath == "" {
 		return nil, fmt.Errorf("file path is required for DBML reader")
 	}
 
+	// Check if path is a directory
+	info, err := os.Stat(r.options.FilePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to stat path: %w", err)
+	}
+
+	if info.IsDir() {
+		return r.readDirectoryDBML(r.options.FilePath)
+	}
+
+	// Single file - existing logic
 	content, err := os.ReadFile(r.options.FilePath)
 	if err != nil {
 		return nil, fmt.Errorf("failed to read file: %w", err)
@@ -67,15 +81,301 @@ func (r *Reader) ReadTable() (*models.Table, error) {
 	return schema.Tables[0], nil
 }
 
-// stripQuotes removes surrounding quotes from an identifier
+// readDirectoryDBML processes all .dbml files in directory
+// Returns merged Database model
+func (r *Reader) readDirectoryDBML(dirPath string) (*models.Database, error) {
+	// Discover and sort DBML files
+	files, err := r.discoverDBMLFiles(dirPath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to discover DBML files: %w", err)
+	}
+
+	// If no files found, return empty database
+	if len(files) == 0 {
+		db := models.InitDatabase("database")
+		if r.options.Metadata != nil {
+			if name, ok := r.options.Metadata["name"].(string); ok {
+				db.Name = name
+			}
+		}
+		return db, nil
+	}
+
+	// Initialize database (will be merged with files)
+	var db *models.Database
+
+	// Process each file in sorted order
+	for _, filePath := range files {
+		content, err := os.ReadFile(filePath)
+		if err != nil {
+			return nil, fmt.Errorf("failed to read file %s: %w", filePath, err)
+		}
+
+		fileDB, err := r.parseDBML(string(content))
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse file %s: %w", filePath, err)
+		}
+
+		// First file initializes the database
+		if db == nil {
+			db = fileDB
+		} else {
+			// Subsequent files are merged
+			mergeDatabase(db, fileDB)
+		}
+	}
+
+	return db, nil
+}
+
+// stripQuotes removes surrounding quotes and comments from an identifier
 func stripQuotes(s string) string {
 	s = strings.TrimSpace(s)
+
+	// Remove DBML comments in brackets (e.g., [note: 'description'])
+	// This handles inline comments like: "table_name" [note: 'comment']
+	commentRegex := regexp.MustCompile(`\s*\[.*?\]\s*`)
+	s = commentRegex.ReplaceAllString(s, "")
+
+	// Trim again after removing comments
+	s = strings.TrimSpace(s)
+
+	// Remove surrounding quotes (double or single)
 	if len(s) >= 2 && ((s[0] == '"' && s[len(s)-1] == '"') || (s[0] == '\'' && s[len(s)-1] == '\'')) {
 		return s[1 : len(s)-1]
 	}
 	return s
 }
 
+// parseFilePrefix extracts numeric prefix from filename
+// Examples: "1_schema.dbml" -> (1, true), "tables.dbml" -> (0, false)
+func parseFilePrefix(filename string) (int, bool) {
+	base := filepath.Base(filename)
+	re := regexp.MustCompile(`^(\d+)[_-]`)
+	matches := re.FindStringSubmatch(base)
+	if len(matches) > 1 {
+		var prefix int
+		_, err := fmt.Sscanf(matches[1], "%d", &prefix)
+		if err == nil {
+			return prefix, true
+		}
+	}
+	return 0, false
+}
+
+// hasCommentedRefs scans file content for commented-out Ref statements
+// Returns true if file contains lines like: // Ref: table.col > other.col
+func hasCommentedRefs(filePath string) (bool, error) {
+	content, err := os.ReadFile(filePath)
+	if err != nil {
+		return false, err
+	}
+
+	scanner := bufio.NewScanner(strings.NewReader(string(content)))
+	commentedRefRegex := regexp.MustCompile(`^\s*//.*Ref:\s+`)
+
+	for scanner.Scan() {
+		line := scanner.Text()
+		if commentedRefRegex.MatchString(line) {
+			return true, nil
+		}
+	}
+
+	return false, nil
+}
+
+// discoverDBMLFiles finds all .dbml files in directory and returns them sorted
+func (r *Reader) discoverDBMLFiles(dirPath string) ([]string, error) {
+	pattern := filepath.Join(dirPath, "*.dbml")
+	files, err := filepath.Glob(pattern)
+	if err != nil {
+		return nil, fmt.Errorf("failed to glob .dbml files: %w", err)
+	}
+
+	return sortDBMLFiles(files), nil
+}
+
+// sortDBMLFiles sorts files by:
+// 1. Files without commented refs (by numeric prefix, then alphabetically)
+// 2. Files with commented refs (by numeric prefix, then alphabetically)
+func sortDBMLFiles(files []string) []string {
+	// Create a slice to hold file info for sorting
+	type fileInfo struct {
+		path         string
+		hasCommented bool
+		prefix       int
+		hasPrefix    bool
+		basename     string
+	}
+
+	fileInfos := make([]fileInfo, 0, len(files))
+
+	for _, file := range files {
+		hasCommented, err := hasCommentedRefs(file)
+		if err != nil {
+			// If we can't read the file, treat it as not having commented refs
+			hasCommented = false
+		}
+
+		prefix, hasPrefix := parseFilePrefix(file)
+		basename := filepath.Base(file)
+
+		fileInfos = append(fileInfos, fileInfo{
+			path:         file,
+			hasCommented: hasCommented,
+			prefix:       prefix,
+			hasPrefix:    hasPrefix,
+			basename:     basename,
+		})
+	}
+
+	// Sort by: hasCommented (false first), hasPrefix (true first), prefix, basename
+	sort.Slice(fileInfos, func(i, j int) bool {
+		// First, sort by commented refs (files without commented refs come first)
+		if fileInfos[i].hasCommented != fileInfos[j].hasCommented {
+			return !fileInfos[i].hasCommented
+		}
+
+		// Then by presence of prefix (files with prefix come first)
+		if fileInfos[i].hasPrefix != fileInfos[j].hasPrefix {
+			return fileInfos[i].hasPrefix
+		}
+
+		// If both have prefix, sort by prefix value
+		if fileInfos[i].hasPrefix && fileInfos[j].hasPrefix {
+			if fileInfos[i].prefix != fileInfos[j].prefix {
+				return fileInfos[i].prefix < fileInfos[j].prefix
+			}
+		}
+
+		// Finally, sort alphabetically by basename
+		return fileInfos[i].basename < fileInfos[j].basename
+	})
+
+	// Extract sorted paths
+	sortedFiles := make([]string, len(fileInfos))
+	for i, info := range fileInfos {
+		sortedFiles[i] = info.path
+	}
+
+	return sortedFiles
+}
+
+// mergeTable combines two table definitions
+// Merges: Columns (map), Constraints (map), Indexes (map), Relationships (map)
+// Uses first non-empty Description
+func mergeTable(baseTable, fileTable *models.Table) {
+	// Merge columns (map naturally merges - later keys overwrite)
+	for key, col := range fileTable.Columns {
+		baseTable.Columns[key] = col
+	}
+
+	// Merge constraints
+	for key, constraint := range fileTable.Constraints {
+		baseTable.Constraints[key] = constraint
+	}
+
+	// Merge indexes
+	for key, index := range fileTable.Indexes {
+		baseTable.Indexes[key] = index
+	}
+
+	// Merge relationships
+	for key, rel := range fileTable.Relationships {
+		baseTable.Relationships[key] = rel
+	}
+
+	// Use first non-empty description
+	if baseTable.Description == "" && fileTable.Description != "" {
+		baseTable.Description = fileTable.Description
+	}
+
+	// Merge metadata maps
+	if baseTable.Metadata == nil {
+		baseTable.Metadata = make(map[string]any)
+	}
+	for key, val := range fileTable.Metadata {
+		baseTable.Metadata[key] = val
+	}
+}
+
+// mergeSchema finds or creates schema and merges tables
+func mergeSchema(baseDB *models.Database, fileSchema *models.Schema) {
+	// Find existing schema by name (normalize names by stripping quotes)
+	var existingSchema *models.Schema
+	fileSchemaName := stripQuotes(fileSchema.Name)
+	for _, schema := range baseDB.Schemas {
+		if stripQuotes(schema.Name) == fileSchemaName {
+			existingSchema = schema
+			break
+		}
+	}
+
+	// If schema doesn't exist, add it and return
+	if existingSchema == nil {
+		baseDB.Schemas = append(baseDB.Schemas, fileSchema)
+		return
+	}
+
+	// Merge tables from fileSchema into existingSchema
+	for _, fileTable := range fileSchema.Tables {
+		// Find existing table by name (normalize names by stripping quotes)
+		var existingTable *models.Table
+		fileTableName := stripQuotes(fileTable.Name)
+		for _, table := range existingSchema.Tables {
+			if stripQuotes(table.Name) == fileTableName {
+				existingTable = table
+				break
+			}
+		}
+
+		// If table doesn't exist, add it
+		if existingTable == nil {
+			existingSchema.Tables = append(existingSchema.Tables, fileTable)
+		} else {
+			// Merge table properties - tables are identical, skip
+			mergeTable(existingTable, fileTable)
+		}
+	}
+
+	// Merge other schema properties
+	existingSchema.Views = append(existingSchema.Views, fileSchema.Views...)
+	existingSchema.Sequences = append(existingSchema.Sequences, fileSchema.Sequences...)
+	existingSchema.Scripts = append(existingSchema.Scripts, fileSchema.Scripts...)
+
+	// Merge permissions
+	if existingSchema.Permissions == nil {
+		existingSchema.Permissions = make(map[string]string)
+	}
+	for key, val := range fileSchema.Permissions {
+		existingSchema.Permissions[key] = val
+	}
+
+	// Merge metadata
+	if existingSchema.Metadata == nil {
+		existingSchema.Metadata = make(map[string]any)
+	}
+	for key, val := range fileSchema.Metadata {
+		existingSchema.Metadata[key] = val
+	}
+}
+
+// mergeDatabase merges schemas from fileDB into baseDB
+func mergeDatabase(baseDB, fileDB *models.Database) {
+	// Merge each schema from fileDB
+	for _, fileSchema := range fileDB.Schemas {
+		mergeSchema(baseDB, fileSchema)
+	}
+
+	// Merge domains
+	baseDB.Domains = append(baseDB.Domains, fileDB.Domains...)
+
+	// Use first non-empty description
+	if baseDB.Description == "" && fileDB.Description != "" {
+		baseDB.Description = fileDB.Description
+	}
+}
+
 // parseDBML parses DBML content and returns a Database model
 func (r *Reader) parseDBML(content string) (*models.Database, error) {
 	db := models.InitDatabase("database")
@@ -332,27 +632,31 @@ func (r *Reader) parseIndex(line, tableName, schemaName string) *models.Index {
 	// Format: (columns) [attributes] OR columnname [attributes]
 	var columns []string
 
-	if strings.Contains(line, "(") && strings.Contains(line, ")") {
+	// Find the attributes section to avoid parsing parentheses in notes/attributes
+	attrStart := strings.Index(line, "[")
+	columnPart := line
+	if attrStart > 0 {
+		columnPart = line[:attrStart]
+	}
+
+	if strings.Contains(columnPart, "(") && strings.Contains(columnPart, ")") {
 		// Multi-column format: (col1, col2) [attributes]
-		colStart := strings.Index(line, "(")
+		colStart := strings.Index(columnPart, "(")
-		colEnd := strings.Index(line, ")")
+		colEnd := strings.Index(columnPart, ")")
 		if colStart >= colEnd {
 			return nil
 		}
 
-		columnsStr := line[colStart+1 : colEnd]
+		columnsStr := columnPart[colStart+1 : colEnd]
 		for _, col := range strings.Split(columnsStr, ",") {
 			columns = append(columns, stripQuotes(strings.TrimSpace(col)))
 		}
-	} else if strings.Contains(line, "[") {
+	} else if attrStart > 0 {
 		// Single column format: columnname [attributes]
 		// Extract column name before the bracket
-		idx := strings.Index(line, "[")
+		colName := strings.TrimSpace(columnPart)
-		if idx > 0 {
+		if colName != "" {
-			colName := strings.TrimSpace(line[:idx])
+			columns = []string{stripQuotes(colName)}
-			if colName != "" {
-				columns = []string{stripQuotes(colName)}
-			}
 		}
 	}
 

pkg/readers/dbml/reader_test.go

@@ -1,6 +1,7 @@
 package dbml
 
 import (
+	"os"
 	"path/filepath"
 	"testing"
 
@@ -517,3 +518,286 @@ func TestGetForeignKeys(t *testing.T) {
 		t.Error("Expected foreign key constraint type")
 	}
 }
+
+// Tests for multi-file directory loading
+
+func TestReadDirectory_MultipleFiles(t *testing.T) {
+	opts := &readers.ReaderOptions{
+		FilePath: filepath.Join("..", "..", "..", "tests", "assets", "dbml", "multifile"),
+	}
+
+	reader := NewReader(opts)
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		t.Fatalf("ReadDatabase() error = %v", err)
+	}
+
+	if db == nil {
+		t.Fatal("ReadDatabase() returned nil database")
+	}
+
+	// Should have public schema
+	if len(db.Schemas) == 0 {
+		t.Fatal("Expected at least one schema")
+	}
+
+	var publicSchema *models.Schema
+	for _, schema := range db.Schemas {
+		if schema.Name == "public" {
+			publicSchema = schema
+			break
+		}
+	}
+
+	if publicSchema == nil {
+		t.Fatal("Public schema not found")
+	}
+
+	// Should have 3 tables: users, posts, comments
+	if len(publicSchema.Tables) != 3 {
+		t.Fatalf("Expected 3 tables, got %d", len(publicSchema.Tables))
+	}
+
+	// Find tables
+	var usersTable, postsTable, commentsTable *models.Table
+	for _, table := range publicSchema.Tables {
+		switch table.Name {
+		case "users":
+			usersTable = table
+		case "posts":
+			postsTable = table
+		case "comments":
+			commentsTable = table
+		}
+	}
+
+	if usersTable == nil {
+		t.Fatal("Users table not found")
+	}
+	if postsTable == nil {
+		t.Fatal("Posts table not found")
+	}
+	if commentsTable == nil {
+		t.Fatal("Comments table not found")
+	}
+
+	// Verify users table has merged columns from 1_users.dbml and 3_add_columns.dbml
+	expectedUserColumns := []string{"id", "email", "name", "created_at"}
+	if len(usersTable.Columns) != len(expectedUserColumns) {
+		t.Errorf("Expected %d columns in users table, got %d", len(expectedUserColumns), len(usersTable.Columns))
+	}
+
+	for _, colName := range expectedUserColumns {
+		if _, exists := usersTable.Columns[colName]; !exists {
+			t.Errorf("Expected column '%s' in users table", colName)
+		}
+	}
+
+	// Verify posts table columns
+	expectedPostColumns := []string{"id", "user_id", "title", "content", "created_at"}
+	for _, colName := range expectedPostColumns {
+		if _, exists := postsTable.Columns[colName]; !exists {
+			t.Errorf("Expected column '%s' in posts table", colName)
+		}
+	}
+}
+
+func TestReadDirectory_TableMerging(t *testing.T) {
+	opts := &readers.ReaderOptions{
+		FilePath: filepath.Join("..", "..", "..", "tests", "assets", "dbml", "multifile"),
+	}
+
+	reader := NewReader(opts)
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		t.Fatalf("ReadDatabase() error = %v", err)
+	}
+
+	// Find users table
+	var usersTable *models.Table
+	for _, schema := range db.Schemas {
+		for _, table := range schema.Tables {
+			if table.Name == "users" && schema.Name == "public" {
+				usersTable = table
+				break
+			}
+		}
+	}
+
+	if usersTable == nil {
+		t.Fatal("Users table not found")
+	}
+
+	// Verify columns from file 1 (id, email)
+	if _, exists := usersTable.Columns["id"]; !exists {
+		t.Error("Column 'id' from 1_users.dbml not found")
+	}
+	if _, exists := usersTable.Columns["email"]; !exists {
+		t.Error("Column 'email' from 1_users.dbml not found")
+	}
+
+	// Verify columns from file 3 (name, created_at)
+	if _, exists := usersTable.Columns["name"]; !exists {
+		t.Error("Column 'name' from 3_add_columns.dbml not found")
+	}
+	if _, exists := usersTable.Columns["created_at"]; !exists {
+		t.Error("Column 'created_at' from 3_add_columns.dbml not found")
+	}
+
+	// Verify column properties from file 1
+	emailCol := usersTable.Columns["email"]
+	if !emailCol.NotNull {
+		t.Error("Email column should be not null (from 1_users.dbml)")
+	}
+	if emailCol.Type != "varchar(255)" {
+		t.Errorf("Expected email type 'varchar(255)', got '%s'", emailCol.Type)
+	}
+}
+
+func TestReadDirectory_CommentedRefsLast(t *testing.T) {
+	// This test verifies that files with commented refs are processed last
+	// by checking that the file discovery returns them in the correct order
+	dirPath := filepath.Join("..", "..", "..", "tests", "assets", "dbml", "multifile")
+
+	opts := &readers.ReaderOptions{
+		FilePath: dirPath,
+	}
+
+	reader := NewReader(opts)
+	files, err := reader.discoverDBMLFiles(dirPath)
+	if err != nil {
+		t.Fatalf("discoverDBMLFiles() error = %v", err)
+	}
+
+	if len(files) < 2 {
+		t.Skip("Not enough files to test ordering")
+	}
+
+	// Check that 9_refs.dbml (which has commented refs) comes last
+	lastFile := filepath.Base(files[len(files)-1])
+	if lastFile != "9_refs.dbml" {
+		t.Errorf("Expected last file to be '9_refs.dbml' (has commented refs), got '%s'", lastFile)
+	}
+
+	// Check that numbered files without commented refs come first
+	firstFile := filepath.Base(files[0])
+	if firstFile != "1_users.dbml" {
+		t.Errorf("Expected first file to be '1_users.dbml', got '%s'", firstFile)
+	}
+}
+
+func TestReadDirectory_EmptyDirectory(t *testing.T) {
+	// Create a temporary empty directory
+	tmpDir := filepath.Join("..", "..", "..", "tests", "assets", "dbml", "empty_test_dir")
+	err := os.MkdirAll(tmpDir, 0755)
+	if err != nil {
+		t.Fatalf("Failed to create temp directory: %v", err)
+	}
+	defer os.RemoveAll(tmpDir)
+
+	opts := &readers.ReaderOptions{
+		FilePath: tmpDir,
+	}
+
+	reader := NewReader(opts)
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		t.Fatalf("ReadDatabase() should not error on empty directory, got: %v", err)
+	}
+
+	if db == nil {
+		t.Fatal("ReadDatabase() returned nil database")
+	}
+
+	// Empty directory should return empty database
+	if len(db.Schemas) != 0 {
+		t.Errorf("Expected 0 schemas for empty directory, got %d", len(db.Schemas))
+	}
+}
+
+func TestReadDatabase_BackwardCompat(t *testing.T) {
+	// Test that single file loading still works
+	opts := &readers.ReaderOptions{
+		FilePath: filepath.Join("..", "..", "..", "tests", "assets", "dbml", "simple.dbml"),
+	}
+
+	reader := NewReader(opts)
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		t.Fatalf("ReadDatabase() error = %v", err)
+	}
+
+	if db == nil {
+		t.Fatal("ReadDatabase() returned nil database")
+	}
+
+	if len(db.Schemas) == 0 {
+		t.Fatal("Expected at least one schema")
+	}
+
+	schema := db.Schemas[0]
+	if len(schema.Tables) != 1 {
+		t.Fatalf("Expected 1 table, got %d", len(schema.Tables))
+	}
+
+	table := schema.Tables[0]
+	if table.Name != "users" {
+		t.Errorf("Expected table name 'users', got '%s'", table.Name)
+	}
+}
+
+func TestParseFilePrefix(t *testing.T) {
+	tests := []struct {
+		filename   string
+		wantPrefix int
+		wantHas    bool
+	}{
+		{"1_schema.dbml", 1, true},
+		{"2_tables.dbml", 2, true},
+		{"10_relationships.dbml", 10, true},
+		{"99_data.dbml", 99, true},
+		{"schema.dbml", 0, false},
+		{"tables_no_prefix.dbml", 0, false},
+		{"/path/to/1_file.dbml", 1, true},
+		{"/path/to/file.dbml", 0, false},
+		{"1-file.dbml", 1, true},
+		{"2-another.dbml", 2, true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.filename, func(t *testing.T) {
+			gotPrefix, gotHas := parseFilePrefix(tt.filename)
+			if gotPrefix != tt.wantPrefix {
+				t.Errorf("parseFilePrefix(%s) prefix = %d, want %d", tt.filename, gotPrefix, tt.wantPrefix)
+			}
+			if gotHas != tt.wantHas {
+				t.Errorf("parseFilePrefix(%s) hasPrefix = %v, want %v", tt.filename, gotHas, tt.wantHas)
+			}
+		})
+	}
+}
+
+func TestHasCommentedRefs(t *testing.T) {
+	// Test with the actual multifile test fixtures
+	tests := []struct {
+		filename string
+		wantHas  bool
+	}{
+		{filepath.Join("..", "..", "..", "tests", "assets", "dbml", "multifile", "1_users.dbml"), false},
+		{filepath.Join("..", "..", "..", "tests", "assets", "dbml", "multifile", "2_posts.dbml"), false},
+		{filepath.Join("..", "..", "..", "tests", "assets", "dbml", "multifile", "3_add_columns.dbml"), false},
+		{filepath.Join("..", "..", "..", "tests", "assets", "dbml", "multifile", "9_refs.dbml"), true},
+	}
+
+	for _, tt := range tests {
+		t.Run(filepath.Base(tt.filename), func(t *testing.T) {
+			gotHas, err := hasCommentedRefs(tt.filename)
+			if err != nil {
+				t.Fatalf("hasCommentedRefs() error = %v", err)
+			}
+			if gotHas != tt.wantHas {
+				t.Errorf("hasCommentedRefs(%s) = %v, want %v", filepath.Base(tt.filename), gotHas, tt.wantHas)
+			}
+		})
+	}
+}

pkg/readers/dctx/reader.go

@@ -79,6 +79,8 @@ func (r *Reader) convertToDatabase(dctx *models.DCTXDictionary) (*models.Databas
 	db := models.InitDatabase(dbName)
 	schema := models.InitSchema("public")
 
+	// Note: DCTX doesn't have database GUID, but schema can use dictionary name if available
+
 	// Create GUID mappings for tables and keys
 	tableGuidMap := make(map[string]string)             // GUID -> table name
 	keyGuidMap := make(map[string]*models.DCTXKey)      // GUID -> key definition
@@ -162,6 +164,10 @@ func (r *Reader) convertTable(dctxTable *models.DCTXTable) (*models.Table, map[s
 	tableName := r.sanitizeName(dctxTable.Name)
 	table := models.InitTable(tableName, "public")
 	table.Description = dctxTable.Description
+	// Assign GUID from DCTX table
+	if dctxTable.Guid != "" {
+		table.GUID = dctxTable.Guid
+	}
 
 	fieldGuidMap := make(map[string]string)
 
@@ -202,6 +208,10 @@ func (r *Reader) convertField(dctxField *models.DCTXField, tableName string) ([]
 
 	// Convert single field
 	column := models.InitColumn(r.sanitizeName(dctxField.Name), tableName, "public")
+	// Assign GUID from DCTX field
+	if dctxField.Guid != "" {
+		column.GUID = dctxField.Guid
+	}
 
 	// Map Clarion data types
 	dataType, length := r.mapDataType(dctxField.DataType, dctxField.Size)
@@ -346,6 +356,10 @@ func (r *Reader) convertKey(dctxKey *models.DCTXKey, table *models.Table, fieldG
 		constraint.Table = table.Name
 		constraint.Schema = table.Schema
 		constraint.Columns = columns
+		// Assign GUID from DCTX key
+		if dctxKey.Guid != "" {
+			constraint.GUID = dctxKey.Guid
+		}
 
 		table.Constraints[constraint.Name] = constraint
 
@@ -366,6 +380,10 @@ func (r *Reader) convertKey(dctxKey *models.DCTXKey, table *models.Table, fieldG
 	index.Columns = columns
 	index.Unique = dctxKey.Unique
 	index.Type = "btree"
+	// Assign GUID from DCTX key
+	if dctxKey.Guid != "" {
+		index.GUID = dctxKey.Guid
+	}
 
 	table.Indexes[index.Name] = index
 	return nil
@@ -460,6 +478,10 @@ func (r *Reader) processRelations(dctx *models.DCTXDictionary, schema *models.Sc
 		constraint.ReferencedColumns = pkColumns
 		constraint.OnDelete = r.mapReferentialAction(relation.Delete)
 		constraint.OnUpdate = r.mapReferentialAction(relation.Update)
+		// Assign GUID from DCTX relation
+		if relation.Guid != "" {
+			constraint.GUID = relation.Guid
+		}
 
 		foreignTable.Constraints[fkName] = constraint
 
@@ -473,6 +495,10 @@ func (r *Reader) processRelations(dctx *models.DCTXDictionary, schema *models.Sc
 		relationship.ForeignKey = fkName
 		relationship.Properties["on_delete"] = constraint.OnDelete
 		relationship.Properties["on_update"] = constraint.OnUpdate
+		// Assign GUID from DCTX relation
+		if relation.Guid != "" {
+			relationship.GUID = relation.Guid
+		}
 
 		foreignTable.Relationships[relationshipName] = relationship
 	}

pkg/readers/drawdb/reader.go

@@ -140,6 +140,32 @@ func (r *Reader) convertToDatabase(drawSchema *drawdb.DrawDBSchema) (*models.Dat
 		db.Schemas = append(db.Schemas, schema)
 	}
 
+	// Convert DrawDB subject areas to domains
+	for _, area := range drawSchema.SubjectAreas {
+		domain := models.InitDomain(area.Name)
+
+		// Find all tables that visually belong to this area
+		// A table belongs to an area if its position is within the area bounds
+		for _, drawTable := range drawSchema.Tables {
+			if drawTable.X >= area.X && drawTable.X <= (area.X+area.Width) &&
+				drawTable.Y >= area.Y && drawTable.Y <= (area.Y+area.Height) {
+
+				schemaName := drawTable.Schema
+				if schemaName == "" {
+					schemaName = "public"
+				}
+
+				domainTable := models.InitDomainTable(drawTable.Name, schemaName)
+				domain.Tables = append(domain.Tables, domainTable)
+			}
+		}
+
+		// Only add domain if it has tables
+		if len(domain.Tables) > 0 {
+			db.Domains = append(db.Domains, domain)
+		}
+	}
+
 	return db, nil
 }
 

pkg/readers/drizzle/reader.go

@@ -241,11 +241,9 @@ func (r *Reader) parsePgEnum(line string, matches []string) *models.Enum {
 		}
 	}
 
-	return &models.Enum{
+	enum := models.InitEnum(enumName, "public")
-		Name:   enumName,
+	enum.Values = values
-		Values: values,
+	return enum
-		Schema: "public",
-	}
 }
 
 // parseTableBlock parses a complete pgTable definition block

pkg/readers/graphql/reader.go

@@ -260,11 +260,7 @@ func (r *Reader) parseType(typeName string, lines []string, schema *models.Schem
 }
 
 func (r *Reader) parseEnum(enumName string, lines []string, schema *models.Schema) {
-	enum := &models.Enum{
+	enum := models.InitEnum(enumName, schema.Name)
-		Name:   enumName,
-		Schema: schema.Name,
-		Values: make([]string, 0),
-	}
 
 	for _, line := range lines {
 		trimmed := strings.TrimSpace(line)

pkg/readers/prisma/reader.go

@@ -128,11 +128,7 @@ func (r *Reader) parsePrisma(content string) (*models.Database, error) {
 		if matches := enumRegex.FindStringSubmatch(trimmed); matches != nil {
 			currentBlock = "enum"
 			enumName := matches[1]
-			currentEnum = &models.Enum{
+			currentEnum = models.InitEnum(enumName, "public")
-				Name:   enumName,
-				Schema: "public",
-				Values: make([]string, 0),
-			}
 			blockContent = []string{}
 			continue
 		}

pkg/readers/sqldir/reader.go

@@ -150,13 +150,11 @@ func (r *Reader) readScripts() ([]*models.Script, error) {
 		}
 
 		// Create Script model
-		script := &models.Script{
+		script := models.InitScript(name)
-			Name:        name,
+		script.Description = fmt.Sprintf("SQL script from %s", relPath)
-			Description: fmt.Sprintf("SQL script from %s", relPath),
+		script.SQL = string(content)
-			SQL:         string(content),
+		script.Priority = priority
-			Priority:    priority,
+		script.Sequence = uint(sequence)
-			Sequence:    uint(sequence),
-		}
 
 		scripts = append(scripts, script)
 

pkg/ui/column_dataops.go

@@ -0,0 +1,95 @@
+package ui
+
+import "git.warky.dev/wdevs/relspecgo/pkg/models"
+
+// Column data operations - business logic for column management
+
+// CreateColumn creates a new column and adds it to a table
+func (se *SchemaEditor) CreateColumn(schemaIndex, tableIndex int, name, dataType string, isPrimaryKey, isNotNull bool) *models.Column {
+	table := se.GetTable(schemaIndex, tableIndex)
+	if table == nil {
+		return nil
+	}
+
+	if table.Columns == nil {
+		table.Columns = make(map[string]*models.Column)
+	}
+
+	newColumn := &models.Column{
+		Name:         name,
+		Type:         dataType,
+		IsPrimaryKey: isPrimaryKey,
+		NotNull:      isNotNull,
+	}
+	table.UpdateDate()
+	table.Columns[name] = newColumn
+	return newColumn
+}
+
+// UpdateColumn updates an existing column's properties
+func (se *SchemaEditor) UpdateColumn(schemaIndex, tableIndex int, oldName, newName, dataType string, isPrimaryKey, isNotNull bool, defaultValue interface{}, description string) bool {
+	table := se.GetTable(schemaIndex, tableIndex)
+	if table == nil {
+		return false
+	}
+
+	column, exists := table.Columns[oldName]
+	if !exists {
+		return false
+	}
+
+	table.UpdateDate()
+
+	// If name changed, remove old entry and create new one
+	if oldName != newName {
+		delete(table.Columns, oldName)
+		column.Name = newName
+		table.Columns[newName] = column
+	}
+
+	// Update properties
+	column.Type = dataType
+	column.IsPrimaryKey = isPrimaryKey
+	column.NotNull = isNotNull
+	column.Default = defaultValue
+	column.Description = description
+
+	return true
+}
+
+// DeleteColumn removes a column from a table
+func (se *SchemaEditor) DeleteColumn(schemaIndex, tableIndex int, columnName string) bool {
+	table := se.GetTable(schemaIndex, tableIndex)
+	if table == nil {
+		return false
+	}
+
+	if _, exists := table.Columns[columnName]; !exists {
+		return false
+	}
+
+	table.UpdateDate()
+
+	delete(table.Columns, columnName)
+	return true
+}
+
+// GetColumn returns a column by name
+func (se *SchemaEditor) GetColumn(schemaIndex, tableIndex int, columnName string) *models.Column {
+	table := se.GetTable(schemaIndex, tableIndex)
+	if table == nil {
+		return nil
+	}
+
+	return table.Columns[columnName]
+}
+
+// GetAllColumns returns all columns in a table
+func (se *SchemaEditor) GetAllColumns(schemaIndex, tableIndex int) map[string]*models.Column {
+	table := se.GetTable(schemaIndex, tableIndex)
+	if table == nil {
+		return nil
+	}
+
+	return table.Columns
+}

pkg/ui/column_screens.go

@@ -0,0 +1,214 @@
+package ui
+
+import (
+	"fmt"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// showColumnEditor shows editor for a specific column
+func (se *SchemaEditor) showColumnEditor(schemaIndex, tableIndex, colIndex int, column *models.Column) {
+	form := tview.NewForm()
+
+	// Store original name to handle renames
+	originalName := column.Name
+
+	// Local variables to collect changes
+	newName := column.Name
+	newType := column.Type
+	newIsPK := column.IsPrimaryKey
+	newIsNotNull := column.NotNull
+	newDefault := column.Default
+	newDescription := column.Description
+	newGUID := column.GUID
+
+	// Column type options: PostgreSQL, MySQL, SQL Server, and common SQL types
+	columnTypes := []string{
+		// Numeric Types
+		"SMALLINT", "INTEGER", "BIGINT", "INT", "TINYINT", "FLOAT", "REAL", "DOUBLE PRECISION",
+		"DECIMAL(10,2)", "NUMERIC", "DECIMAL", "NUMERIC(10,2)",
+		// Character Types
+		"CHAR", "VARCHAR", "VARCHAR(255)", "TEXT", "NCHAR", "NVARCHAR", "NVARCHAR(255)",
+		// Boolean
+		"BOOLEAN", "BOOL", "BIT",
+		// Date/Time Types
+		"DATE", "TIME", "TIMESTAMP", "TIMESTAMP WITH TIME ZONE", "INTERVAL",
+		"DATETIME", "DATETIME2", "DATEFIRST",
+		// UUID and JSON
+		"UUID", "GUID", "JSON", "JSONB",
+		// Binary Types
+		"BYTEA", "BLOB", "IMAGE", "VARBINARY", "VARBINARY(MAX)", "BINARY",
+		// PostgreSQL Special Types
+		"int4range", "int8range", "numrange", "tsrange", "tstzrange", "daterange",
+		"HSTORE", "CITEXT", "INET", "MACADDR", "POINT", "LINE", "LSEG", "BOX", "PATH", "POLYGON", "CIRCLE",
+		// Array Types
+		"INTEGER ARRAY", "VARCHAR ARRAY", "TEXT ARRAY", "BIGINT ARRAY",
+		// MySQL Specific
+		"MEDIUMINT", "DOUBLE", "FLOAT(10,2)",
+		// SQL Server Specific
+		"MONEY", "SMALLMONEY", "SQL_VARIANT",
+	}
+	selectedTypeIndex := 0
+
+	// Add existing type if not already in the list
+	typeExists := false
+	for i, opt := range columnTypes {
+		if opt == column.Type {
+			selectedTypeIndex = i
+			typeExists = true
+			break
+		}
+	}
+	if !typeExists && column.Type != "" {
+		columnTypes = append(columnTypes, column.Type)
+		selectedTypeIndex = len(columnTypes) - 1
+	}
+
+	form.AddInputField("Column Name", column.Name, 40, nil, func(value string) {
+		newName = value
+	})
+
+	form.AddDropDown("Type", columnTypes, selectedTypeIndex, func(option string, index int) {
+		newType = option
+	})
+
+	form.AddCheckbox("Primary Key", column.IsPrimaryKey, func(checked bool) {
+		newIsPK = checked
+	})
+
+	form.AddCheckbox("Not Null", column.NotNull, func(checked bool) {
+		newIsNotNull = checked
+	})
+
+	defaultStr := ""
+	if column.Default != nil {
+		defaultStr = fmt.Sprintf("%v", column.Default)
+	}
+	form.AddInputField("Default Value", defaultStr, 40, nil, func(value string) {
+		newDefault = value
+	})
+
+	form.AddTextArea("Description", column.Description, 40, 5, 0, func(value string) {
+		newDescription = value
+	})
+
+	form.AddInputField("GUID", column.GUID, 40, nil, func(value string) {
+		newGUID = value
+	})
+
+	form.AddButton("Save", func() {
+		// Apply changes using dataops
+		se.UpdateColumn(schemaIndex, tableIndex, originalName, newName, newType, newIsPK, newIsNotNull, newDefault, newDescription)
+		se.db.Schemas[schemaIndex].Tables[tableIndex].Columns[newName].GUID = newGUID
+
+		se.pages.RemovePage("column-editor")
+		se.pages.SwitchToPage("table-editor")
+	})
+
+	form.AddButton("Delete", func() {
+		se.showDeleteColumnConfirm(schemaIndex, tableIndex, originalName)
+	})
+
+	form.AddButton("Back", func() {
+		// Discard changes - don't apply them
+		se.pages.RemovePage("column-editor")
+		se.pages.SwitchToPage("table-editor")
+	})
+
+	form.SetBorder(true).SetTitle(" Edit Column ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("column-editor", "table-editor")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("column-editor", form, true, true)
+}
+
+// showNewColumnDialog shows dialog to create a new column
+func (se *SchemaEditor) showNewColumnDialog(schemaIndex, tableIndex int) {
+	form := tview.NewForm()
+
+	columnName := ""
+	dataType := "VARCHAR(255)"
+
+	// Column type options: PostgreSQL, MySQL, SQL Server, and common SQL types
+	columnTypes := []string{
+		// Numeric Types
+		"SMALLINT", "INTEGER", "BIGINT", "INT", "TINYINT", "FLOAT", "REAL", "DOUBLE PRECISION",
+		"DECIMAL(10,2)", "NUMERIC", "DECIMAL", "NUMERIC(10,2)",
+		// Character Types
+		"CHAR", "VARCHAR", "VARCHAR(255)", "TEXT", "NCHAR", "NVARCHAR", "NVARCHAR(255)",
+		// Boolean
+		"BOOLEAN", "BOOL", "BIT",
+		// Date/Time Types
+		"DATE", "TIME", "TIMESTAMP", "TIMESTAMP WITH TIME ZONE", "INTERVAL",
+		"DATETIME", "DATETIME2", "DATEFIRST",
+		// UUID and JSON
+		"UUID", "GUID", "JSON", "JSONB",
+		// Binary Types
+		"BYTEA", "BLOB", "IMAGE", "VARBINARY", "VARBINARY(MAX)", "BINARY",
+		// PostgreSQL Special Types
+		"int4range", "int8range", "numrange", "tsrange", "tstzrange", "daterange",
+		"HSTORE", "CITEXT", "INET", "MACADDR", "POINT", "LINE", "LSEG", "BOX", "PATH", "POLYGON", "CIRCLE",
+		// Array Types
+		"INTEGER ARRAY", "VARCHAR ARRAY", "TEXT ARRAY", "BIGINT ARRAY",
+		// MySQL Specific
+		"MEDIUMINT", "DOUBLE", "FLOAT(10,2)",
+		// SQL Server Specific
+		"MONEY", "SMALLMONEY", "SQL_VARIANT",
+	}
+	selectedTypeIndex := 0
+
+	form.AddInputField("Column Name", "", 40, nil, func(value string) {
+		columnName = value
+	})
+
+	form.AddDropDown("Data Type", columnTypes, selectedTypeIndex, func(option string, index int) {
+		dataType = option
+	})
+
+	form.AddCheckbox("Primary Key", false, nil)
+	form.AddCheckbox("Not Null", false, nil)
+	form.AddCheckbox("Unique", false, nil)
+
+	form.AddButton("Save", func() {
+		if columnName == "" {
+			return
+		}
+
+		// Get form values
+		isPK := form.GetFormItemByLabel("Primary Key").(*tview.Checkbox).IsChecked()
+		isNotNull := form.GetFormItemByLabel("Not Null").(*tview.Checkbox).IsChecked()
+
+		se.CreateColumn(schemaIndex, tableIndex, columnName, dataType, isPK, isNotNull)
+
+		table := se.db.Schemas[schemaIndex].Tables[tableIndex]
+		se.pages.RemovePage("new-column")
+		se.pages.RemovePage("table-editor")
+		se.showTableEditor(schemaIndex, tableIndex, table)
+	})
+
+	form.AddButton("Back", func() {
+		table := se.db.Schemas[schemaIndex].Tables[tableIndex]
+		se.pages.RemovePage("new-column")
+		se.pages.RemovePage("table-editor")
+		se.showTableEditor(schemaIndex, tableIndex, table)
+	})
+
+	form.SetBorder(true).SetTitle(" New Column ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("new-column", "table-editor")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("new-column", form, true, true)
+}

pkg/ui/database_dataops.go

@@ -0,0 +1,15 @@
+package ui
+
+import (
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// updateDatabase updates database properties
+func (se *SchemaEditor) updateDatabase(name, description, comment, dbType, dbVersion string) {
+	se.db.Name = name
+	se.db.Description = description
+	se.db.Comment = comment
+	se.db.DatabaseType = models.DatabaseType(dbType)
+	se.db.DatabaseVersion = dbVersion
+	se.db.UpdateDate()
+}

pkg/ui/database_screens.go

@@ -0,0 +1,78 @@
+package ui
+
+import (
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+// showEditDatabaseForm displays a dialog to edit database properties
+func (se *SchemaEditor) showEditDatabaseForm() {
+	form := tview.NewForm()
+
+	dbName := se.db.Name
+	dbDescription := se.db.Description
+	dbComment := se.db.Comment
+	dbType := string(se.db.DatabaseType)
+	dbVersion := se.db.DatabaseVersion
+	dbGUID := se.db.GUID
+
+	// Database type options
+	dbTypeOptions := []string{"pgsql", "mssql", "sqlite"}
+	selectedTypeIndex := 0
+	for i, opt := range dbTypeOptions {
+		if opt == dbType {
+			selectedTypeIndex = i
+			break
+		}
+	}
+
+	form.AddInputField("Database Name", dbName, 40, nil, func(value string) {
+		dbName = value
+	})
+
+	form.AddInputField("Description", dbDescription, 50, nil, func(value string) {
+		dbDescription = value
+	})
+
+	form.AddInputField("Comment", dbComment, 50, nil, func(value string) {
+		dbComment = value
+	})
+
+	form.AddDropDown("Database Type", dbTypeOptions, selectedTypeIndex, func(option string, index int) {
+		dbType = option
+	})
+
+	form.AddInputField("Database Version", dbVersion, 20, nil, func(value string) {
+		dbVersion = value
+	})
+
+	form.AddInputField("GUID", dbGUID, 40, nil, func(value string) {
+		dbGUID = value
+	})
+
+	form.AddButton("Save", func() {
+		if dbName == "" {
+			return
+		}
+		se.updateDatabase(dbName, dbDescription, dbComment, dbType, dbVersion)
+		se.db.GUID = dbGUID
+		se.pages.RemovePage("edit-database")
+		se.pages.RemovePage("main")
+		se.pages.AddPage("main", se.createMainMenu(), true, true)
+	})
+
+	form.AddButton("Back", func() {
+		se.pages.RemovePage("edit-database")
+	})
+
+	form.SetBorder(true).SetTitle(" Edit Database ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("edit-database", "main")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("edit-database", form, true, true)
+}

pkg/ui/dialogs.go

@@ -0,0 +1,139 @@
+package ui
+
+import (
+	"fmt"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+// showExitConfirmation shows a confirmation dialog when trying to exit without saving
+func (se *SchemaEditor) showExitConfirmation(pageToRemove, pageToSwitchTo string) {
+	modal := tview.NewModal().
+		SetText("Exit without saving changes?").
+		AddButtons([]string{"Cancel", "No, exit without saving"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			if buttonLabel == "No, exit without saving" {
+				se.pages.RemovePage(pageToRemove)
+				se.pages.SwitchToPage(pageToSwitchTo)
+			}
+			se.pages.RemovePage("exit-confirm")
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("exit-confirm")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("exit-confirm", modal, true, true)
+}
+
+// showExitEditorConfirm shows confirmation dialog when trying to exit the entire editor
+func (se *SchemaEditor) showExitEditorConfirm() {
+	modal := tview.NewModal().
+		SetText("Exit RelSpec Editor? Press ESC again to confirm.").
+		AddButtons([]string{"Cancel", "Exit"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			if buttonLabel == "Exit" {
+				se.app.Stop()
+			}
+			se.pages.RemovePage("exit-editor-confirm")
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.app.Stop()
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("exit-editor-confirm", modal, true, true)
+}
+
+// showDeleteSchemaConfirm shows confirmation dialog for schema deletion
+func (se *SchemaEditor) showDeleteSchemaConfirm(schemaIndex int) {
+	modal := tview.NewModal().
+		SetText(fmt.Sprintf("Delete schema '%s'? This will delete all tables in this schema.",
+			se.db.Schemas[schemaIndex].Name)).
+		AddButtons([]string{"Cancel", "Delete"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			if buttonLabel == "Delete" {
+				se.DeleteSchema(schemaIndex)
+				se.pages.RemovePage("schema-editor")
+				se.pages.RemovePage("schemas")
+				se.showSchemaList()
+			}
+			se.pages.RemovePage("confirm-delete-schema")
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("confirm-delete-schema")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("confirm-delete-schema", modal, true, true)
+}
+
+// showDeleteTableConfirm shows confirmation dialog for table deletion
+func (se *SchemaEditor) showDeleteTableConfirm(schemaIndex, tableIndex int) {
+	table := se.db.Schemas[schemaIndex].Tables[tableIndex]
+	modal := tview.NewModal().
+		SetText(fmt.Sprintf("Delete table '%s'? This action cannot be undone.",
+			table.Name)).
+		AddButtons([]string{"Cancel", "Delete"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			if buttonLabel == "Delete" {
+				se.DeleteTable(schemaIndex, tableIndex)
+				schema := se.db.Schemas[schemaIndex]
+				se.pages.RemovePage("table-editor")
+				se.pages.RemovePage("schema-editor")
+				se.showSchemaEditor(schemaIndex, schema)
+			}
+			se.pages.RemovePage("confirm-delete-table")
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("confirm-delete-table")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("confirm-delete-table", modal, true, true)
+}
+
+// showDeleteColumnConfirm shows confirmation dialog for column deletion
+func (se *SchemaEditor) showDeleteColumnConfirm(schemaIndex, tableIndex int, columnName string) {
+	modal := tview.NewModal().
+		SetText(fmt.Sprintf("Delete column '%s'? This action cannot be undone.",
+			columnName)).
+		AddButtons([]string{"Cancel", "Delete"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			if buttonLabel == "Delete" {
+				se.DeleteColumn(schemaIndex, tableIndex, columnName)
+				se.pages.RemovePage("column-editor")
+				se.pages.RemovePage("confirm-delete-column")
+				se.pages.SwitchToPage("table-editor")
+			} else {
+				se.pages.RemovePage("confirm-delete-column")
+			}
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("confirm-delete-column")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("confirm-delete-column", modal, true, true)
+}

pkg/ui/domain_dataops.go

@@ -0,0 +1,35 @@
+package ui
+
+import (
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// createDomain creates a new domain
+func (se *SchemaEditor) createDomain(name, description string) {
+	domain := &models.Domain{
+		Name:        name,
+		Description: description,
+		Tables:      make([]*models.DomainTable, 0),
+		Sequence:    uint(len(se.db.Domains)),
+	}
+
+	se.db.Domains = append(se.db.Domains, domain)
+	se.showDomainList()
+}
+
+// updateDomain updates an existing domain
+func (se *SchemaEditor) updateDomain(index int, name, description string) {
+	if index >= 0 && index < len(se.db.Domains) {
+		se.db.Domains[index].Name = name
+		se.db.Domains[index].Description = description
+		se.showDomainList()
+	}
+}
+
+// deleteDomain deletes a domain by index
+func (se *SchemaEditor) deleteDomain(index int) {
+	if index >= 0 && index < len(se.db.Domains) {
+		se.db.Domains = append(se.db.Domains[:index], se.db.Domains[index+1:]...)
+		se.showDomainList()
+	}
+}

pkg/ui/domain_screens.go

@@ -0,0 +1,258 @@
+package ui
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// showDomainList displays the domain management screen
+func (se *SchemaEditor) showDomainList() {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText("[::b]Manage Domains").
+		SetDynamicColors(true).
+		SetTextAlign(tview.AlignCenter)
+
+	// Create domains table
+	domainTable := tview.NewTable().SetBorders(true).SetSelectable(true, false).SetFixed(1, 0)
+
+	// Add header row
+	headers := []string{"Name", "Sequence", "Total Tables", "Description"}
+	headerWidths := []int{20, 15, 20}
+	for i, header := range headers {
+		padding := ""
+		if i < len(headerWidths) {
+			padding = strings.Repeat(" ", headerWidths[i]-len(header))
+		}
+		cell := tview.NewTableCell(header + padding).
+			SetTextColor(tcell.ColorYellow).
+			SetSelectable(false).
+			SetAlign(tview.AlignLeft)
+		domainTable.SetCell(0, i, cell)
+	}
+
+	// Add existing domains
+	for row, domain := range se.db.Domains {
+		domain := domain // capture for closure
+
+		// Name - pad to 20 chars
+		nameStr := fmt.Sprintf("%-20s", domain.Name)
+		nameCell := tview.NewTableCell(nameStr).SetSelectable(true)
+		domainTable.SetCell(row+1, 0, nameCell)
+
+		// Sequence - pad to 15 chars
+		seqStr := fmt.Sprintf("%-15s", fmt.Sprintf("%d", domain.Sequence))
+		seqCell := tview.NewTableCell(seqStr).SetSelectable(true)
+		domainTable.SetCell(row+1, 1, seqCell)
+
+		// Total Tables - pad to 20 chars
+		tablesStr := fmt.Sprintf("%-20s", fmt.Sprintf("%d", len(domain.Tables)))
+		tablesCell := tview.NewTableCell(tablesStr).SetSelectable(true)
+		domainTable.SetCell(row+1, 2, tablesCell)
+
+		// Description - no padding, takes remaining space
+		descCell := tview.NewTableCell(domain.Description).SetSelectable(true)
+		domainTable.SetCell(row+1, 3, descCell)
+	}
+
+	domainTable.SetTitle(" Domains ").SetBorder(true).SetTitleAlign(tview.AlignLeft)
+
+	// Action buttons flex
+	btnFlex := tview.NewFlex()
+	btnNewDomain := tview.NewButton("New Domain [n]").SetSelectedFunc(func() {
+		se.showNewDomainDialog()
+	})
+	btnBack := tview.NewButton("Back [b]").SetSelectedFunc(func() {
+		se.pages.SwitchToPage("main")
+		se.pages.RemovePage("domains")
+	})
+
+	// Set up button input captures for Tab/Shift+Tab navigation
+	btnNewDomain.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(domainTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnBack)
+			return nil
+		}
+		return event
+	})
+
+	btnBack.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnNewDomain)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(domainTable)
+			return nil
+		}
+		return event
+	})
+
+	btnFlex.AddItem(btnNewDomain, 0, 1, true).
+		AddItem(btnBack, 0, 1, false)
+
+	domainTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.SwitchToPage("main")
+			se.pages.RemovePage("domains")
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnNewDomain)
+			return nil
+		}
+		if event.Key() == tcell.KeyEnter {
+			row, _ := domainTable.GetSelection()
+			if row > 0 && row <= len(se.db.Domains) { // Skip header row
+				domainIndex := row - 1
+				se.showDomainEditor(domainIndex, se.db.Domains[domainIndex])
+				return nil
+			}
+		}
+		if event.Rune() == 'n' {
+			se.showNewDomainDialog()
+			return nil
+		}
+		if event.Rune() == 'b' {
+			se.pages.SwitchToPage("main")
+			se.pages.RemovePage("domains")
+			return nil
+		}
+		return event
+	})
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(domainTable, 0, 1, true).
+		AddItem(btnFlex, 1, 0, false)
+
+	se.pages.AddPage("domains", flex, true, true)
+}
+
+// showNewDomainDialog displays a dialog to create a new domain
+func (se *SchemaEditor) showNewDomainDialog() {
+	form := tview.NewForm()
+
+	domainName := ""
+	domainDesc := ""
+
+	form.AddInputField("Name", "", 40, nil, func(value string) {
+		domainName = value
+	})
+
+	form.AddInputField("Description", "", 50, nil, func(value string) {
+		domainDesc = value
+	})
+
+	form.AddButton("Save", func() {
+		if domainName == "" {
+			return
+		}
+		se.createDomain(domainName, domainDesc)
+		se.pages.RemovePage("new-domain")
+		se.pages.RemovePage("domains")
+		se.showDomainList()
+	})
+
+	form.AddButton("Back", func() {
+		se.pages.RemovePage("new-domain")
+		se.pages.RemovePage("domains")
+		se.showDomainList()
+	})
+
+	form.SetBorder(true).SetTitle(" New Domain ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("new-domain", "domains")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("new-domain", form, true, true)
+}
+
+// showDomainEditor displays a dialog to edit an existing domain
+func (se *SchemaEditor) showDomainEditor(index int, domain *models.Domain) {
+	form := tview.NewForm()
+
+	domainName := domain.Name
+	domainDesc := domain.Description
+
+	form.AddInputField("Name", domainName, 40, nil, func(value string) {
+		domainName = value
+	})
+
+	form.AddInputField("Description", domainDesc, 50, nil, func(value string) {
+		domainDesc = value
+	})
+
+	form.AddButton("Save", func() {
+		if domainName == "" {
+			return
+		}
+		se.updateDomain(index, domainName, domainDesc)
+		se.pages.RemovePage("edit-domain")
+		se.pages.RemovePage("domains")
+		se.showDomainList()
+	})
+
+	form.AddButton("Delete", func() {
+		se.showDeleteDomainConfirm(index)
+	})
+
+	form.AddButton("Back", func() {
+		se.pages.RemovePage("edit-domain")
+		se.pages.RemovePage("domains")
+		se.showDomainList()
+	})
+
+	form.SetBorder(true).SetTitle(" Edit Domain ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("edit-domain", "domains")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("edit-domain", form, true, true)
+}
+
+// showDeleteDomainConfirm shows a confirmation dialog before deleting a domain
+func (se *SchemaEditor) showDeleteDomainConfirm(index int) {
+	modal := tview.NewModal().
+		SetText(fmt.Sprintf("Delete domain '%s'? This action cannot be undone.", se.db.Domains[index].Name)).
+		AddButtons([]string{"Cancel", "Delete"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			if buttonLabel == "Delete" {
+				se.deleteDomain(index)
+				se.pages.RemovePage("delete-domain-confirm")
+				se.pages.RemovePage("edit-domain")
+				se.pages.RemovePage("domains")
+				se.showDomainList()
+			} else {
+				se.pages.RemovePage("delete-domain-confirm")
+			}
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("delete-domain-confirm")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddAndSwitchToPage("delete-domain-confirm", modal, true)
+}

pkg/ui/editor.go

@@ -0,0 +1,73 @@
+package ui
+
+import (
+	"fmt"
+
+	"github.com/rivo/tview"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// SchemaEditor represents the interactive schema editor
+type SchemaEditor struct {
+	db         *models.Database
+	app        *tview.Application
+	pages      *tview.Pages
+	loadConfig *LoadConfig
+	saveConfig *SaveConfig
+}
+
+// NewSchemaEditor creates a new schema editor
+func NewSchemaEditor(db *models.Database) *SchemaEditor {
+	return &SchemaEditor{
+		db:         db,
+		app:        tview.NewApplication(),
+		pages:      tview.NewPages(),
+		loadConfig: nil,
+		saveConfig: nil,
+	}
+}
+
+// NewSchemaEditorWithConfigs creates a new schema editor with load/save configurations
+func NewSchemaEditorWithConfigs(db *models.Database, loadConfig *LoadConfig, saveConfig *SaveConfig) *SchemaEditor {
+	return &SchemaEditor{
+		db:         db,
+		app:        tview.NewApplication(),
+		pages:      tview.NewPages(),
+		loadConfig: loadConfig,
+		saveConfig: saveConfig,
+	}
+}
+
+// Run starts the interactive editor
+func (se *SchemaEditor) Run() error {
+	// If no database is loaded, show load screen
+	if se.db == nil {
+		se.showLoadScreen()
+	} else {
+		// Create main menu view
+		mainMenu := se.createMainMenu()
+		se.pages.AddPage("main", mainMenu, true, true)
+	}
+
+	// Run the application
+	if err := se.app.SetRoot(se.pages, true).Run(); err != nil {
+		return fmt.Errorf("application error: %w", err)
+	}
+
+	return nil
+}
+
+// GetDatabase returns the current database
+func (se *SchemaEditor) GetDatabase() *models.Database {
+	return se.db
+}
+
+// Helper function to get sorted column names
+func getColumnNames(table *models.Table) []string {
+	names := make([]string, 0, len(table.Columns))
+	for name := range table.Columns {
+		names = append(names, name)
+	}
+	return names
+}

pkg/ui/load_save_screens.go

@@ -0,0 +1,791 @@
+package ui
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/merge"
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+	"git.warky.dev/wdevs/relspecgo/pkg/readers"
+	rbun "git.warky.dev/wdevs/relspecgo/pkg/readers/bun"
+	rdbml "git.warky.dev/wdevs/relspecgo/pkg/readers/dbml"
+	rdctx "git.warky.dev/wdevs/relspecgo/pkg/readers/dctx"
+	rdrawdb "git.warky.dev/wdevs/relspecgo/pkg/readers/drawdb"
+	rdrizzle "git.warky.dev/wdevs/relspecgo/pkg/readers/drizzle"
+	rgorm "git.warky.dev/wdevs/relspecgo/pkg/readers/gorm"
+	rgraphql "git.warky.dev/wdevs/relspecgo/pkg/readers/graphql"
+	rjson "git.warky.dev/wdevs/relspecgo/pkg/readers/json"
+	rpgsql "git.warky.dev/wdevs/relspecgo/pkg/readers/pgsql"
+	rprisma "git.warky.dev/wdevs/relspecgo/pkg/readers/prisma"
+	rtypeorm "git.warky.dev/wdevs/relspecgo/pkg/readers/typeorm"
+	ryaml "git.warky.dev/wdevs/relspecgo/pkg/readers/yaml"
+	"git.warky.dev/wdevs/relspecgo/pkg/writers"
+	wbun "git.warky.dev/wdevs/relspecgo/pkg/writers/bun"
+	wdbml "git.warky.dev/wdevs/relspecgo/pkg/writers/dbml"
+	wdctx "git.warky.dev/wdevs/relspecgo/pkg/writers/dctx"
+	wdrawdb "git.warky.dev/wdevs/relspecgo/pkg/writers/drawdb"
+	wdrizzle "git.warky.dev/wdevs/relspecgo/pkg/writers/drizzle"
+	wgorm "git.warky.dev/wdevs/relspecgo/pkg/writers/gorm"
+	wgraphql "git.warky.dev/wdevs/relspecgo/pkg/writers/graphql"
+	wjson "git.warky.dev/wdevs/relspecgo/pkg/writers/json"
+	wpgsql "git.warky.dev/wdevs/relspecgo/pkg/writers/pgsql"
+	wprisma "git.warky.dev/wdevs/relspecgo/pkg/writers/prisma"
+	wtypeorm "git.warky.dev/wdevs/relspecgo/pkg/writers/typeorm"
+	wyaml "git.warky.dev/wdevs/relspecgo/pkg/writers/yaml"
+)
+
+// LoadConfig holds the configuration for loading a database
+type LoadConfig struct {
+	SourceType string
+	FilePath   string
+	ConnString string
+}
+
+// SaveConfig holds the configuration for saving a database
+type SaveConfig struct {
+	TargetType string
+	FilePath   string
+	ConnString string
+}
+
+// showLoadScreen displays the database load screen
+func (se *SchemaEditor) showLoadScreen() {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText("[::b]Load Database Schema").
+		SetTextAlign(tview.AlignCenter).
+		SetDynamicColors(true)
+
+	// Form
+	form := tview.NewForm()
+	form.SetBorder(true).SetTitle(" Load Configuration ").SetTitleAlign(tview.AlignLeft)
+
+	// Format selection
+	formatOptions := []string{
+		"dbml", "dctx", "drawdb", "graphql", "json", "yaml",
+		"gorm", "bun", "drizzle", "prisma", "typeorm", "pgsql",
+	}
+	selectedFormat := 0
+	currentFormat := formatOptions[selectedFormat]
+
+	// File path input
+	filePath := ""
+	connString := ""
+
+	form.AddDropDown("Format", formatOptions, 0, func(option string, index int) {
+		selectedFormat = index
+		currentFormat = option
+	})
+
+	form.AddInputField("File Path", "", 50, nil, func(value string) {
+		filePath = value
+	})
+
+	form.AddInputField("Connection String", "", 50, nil, func(value string) {
+		connString = value
+	})
+
+	form.AddTextView("Help", getLoadHelpText(), 0, 5, true, false)
+
+	// Buttons
+	form.AddButton("Load [l]", func() {
+		se.loadDatabase(currentFormat, filePath, connString)
+	})
+
+	form.AddButton("Create New [n]", func() {
+		se.createNewDatabase()
+	})
+
+	form.AddButton("Exit [q]", func() {
+		se.app.Stop()
+	})
+
+	// Keyboard shortcuts
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.app.Stop()
+			return nil
+		}
+		switch event.Rune() {
+		case 'l':
+			se.loadDatabase(currentFormat, filePath, connString)
+			return nil
+		case 'n':
+			se.createNewDatabase()
+			return nil
+		case 'q':
+			se.app.Stop()
+			return nil
+		}
+		return event
+	})
+
+	// Tab navigation
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.app.Stop()
+			return nil
+		}
+		if event.Rune() == 'l' || event.Rune() == 'n' || event.Rune() == 'q' {
+			return event
+		}
+		return event
+	})
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(form, 0, 1, true)
+
+	se.pages.AddAndSwitchToPage("load-database", flex, true)
+}
+
+// showSaveScreen displays the save database screen
+func (se *SchemaEditor) showSaveScreen() {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText("[::b]Save Database Schema").
+		SetTextAlign(tview.AlignCenter).
+		SetDynamicColors(true)
+
+	// Form
+	form := tview.NewForm()
+	form.SetBorder(true).SetTitle(" Save Configuration ").SetTitleAlign(tview.AlignLeft)
+
+	// Format selection
+	formatOptions := []string{
+		"dbml", "dctx", "drawdb", "graphql", "json", "yaml",
+		"gorm", "bun", "drizzle", "prisma", "typeorm", "pgsql",
+	}
+	selectedFormat := 0
+	currentFormat := formatOptions[selectedFormat]
+
+	// File path input
+	filePath := ""
+	if se.saveConfig != nil {
+		// Pre-populate with existing save config
+		for i, format := range formatOptions {
+			if format == se.saveConfig.TargetType {
+				selectedFormat = i
+				currentFormat = format
+				break
+			}
+		}
+		filePath = se.saveConfig.FilePath
+	}
+
+	form.AddDropDown("Format", formatOptions, selectedFormat, func(option string, index int) {
+		selectedFormat = index
+		currentFormat = option
+	})
+
+	form.AddInputField("File Path", filePath, 50, nil, func(value string) {
+		filePath = value
+	})
+
+	form.AddTextView("Help", getSaveHelpText(), 0, 5, true, false)
+
+	// Buttons
+	form.AddButton("Save [s]", func() {
+		se.saveDatabase(currentFormat, filePath)
+	})
+
+	form.AddButton("Update Existing Database [u]", func() {
+		// Use saveConfig if available, otherwise use loadConfig
+		if se.saveConfig != nil {
+			se.showUpdateExistingDatabaseConfirm()
+		} else if se.loadConfig != nil {
+			se.showUpdateExistingDatabaseConfirm()
+		} else {
+			se.showErrorDialog("Error", "No database source found. Use Save instead.")
+		}
+	})
+
+	form.AddButton("Back [b]", func() {
+		se.pages.RemovePage("save-database")
+		se.pages.SwitchToPage("main")
+	})
+
+	// Keyboard shortcuts
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("save-database")
+			se.pages.SwitchToPage("main")
+			return nil
+		}
+		switch event.Rune() {
+		case 's':
+			se.saveDatabase(currentFormat, filePath)
+			return nil
+		case 'u':
+			// Use saveConfig if available, otherwise use loadConfig
+			if se.saveConfig != nil {
+				se.showUpdateExistingDatabaseConfirm()
+			} else if se.loadConfig != nil {
+				se.showUpdateExistingDatabaseConfirm()
+			} else {
+				se.showErrorDialog("Error", "No database source found. Use Save instead.")
+			}
+			return nil
+		case 'b':
+			se.pages.RemovePage("save-database")
+			se.pages.SwitchToPage("main")
+			return nil
+		}
+		return event
+	})
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(form, 0, 1, true)
+
+	se.pages.AddAndSwitchToPage("save-database", flex, true)
+}
+
+// loadDatabase loads a database from the specified configuration
+func (se *SchemaEditor) loadDatabase(format, filePath, connString string) {
+	// Validate input
+	if format == "pgsql" {
+		if connString == "" {
+			se.showErrorDialog("Error", "Connection string is required for PostgreSQL")
+			return
+		}
+	} else {
+		if filePath == "" {
+			se.showErrorDialog("Error", "File path is required for "+format)
+			return
+		}
+		// Expand home directory
+		if len(filePath) > 0 && filePath[0] == '~' {
+			home, err := os.UserHomeDir()
+			if err == nil {
+				filePath = filepath.Join(home, filePath[1:])
+			}
+		}
+	}
+
+	// Create reader
+	var reader readers.Reader
+	switch format {
+	case "dbml":
+		reader = rdbml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "dctx":
+		reader = rdctx.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drawdb":
+		reader = rdrawdb.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "graphql":
+		reader = rgraphql.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "json":
+		reader = rjson.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "yaml":
+		reader = ryaml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "gorm":
+		reader = rgorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "bun":
+		reader = rbun.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drizzle":
+		reader = rdrizzle.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "prisma":
+		reader = rprisma.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "typeorm":
+		reader = rtypeorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "pgsql":
+		reader = rpgsql.NewReader(&readers.ReaderOptions{ConnectionString: connString})
+	default:
+		se.showErrorDialog("Error", "Unsupported format: "+format)
+		return
+	}
+
+	// Read database
+	db, err := reader.ReadDatabase()
+	if err != nil {
+		se.showErrorDialog("Load Error", fmt.Sprintf("Failed to load database: %v", err))
+		return
+	}
+
+	// Store load config
+	se.loadConfig = &LoadConfig{
+		SourceType: format,
+		FilePath:   filePath,
+		ConnString: connString,
+	}
+
+	// Update database
+	se.db = db
+
+	// Show success and switch to main menu
+	se.showSuccessDialog("Load Complete", fmt.Sprintf("Successfully loaded database '%s'", db.Name), func() {
+		se.pages.RemovePage("load-database")
+		se.pages.RemovePage("main")
+		se.pages.AddPage("main", se.createMainMenu(), true, true)
+	})
+}
+
+// saveDatabase saves the database to the specified configuration
+func (se *SchemaEditor) saveDatabase(format, filePath string) {
+	// Validate input
+	if format == "pgsql" {
+		se.showErrorDialog("Error", "Direct PostgreSQL save is not supported from the UI. Use --to pgsql --to-path output.sql")
+		return
+	}
+
+	if filePath == "" {
+		se.showErrorDialog("Error", "File path is required")
+		return
+	}
+
+	// Expand home directory
+	if len(filePath) > 0 && filePath[0] == '~' {
+		home, err := os.UserHomeDir()
+		if err == nil {
+			filePath = filepath.Join(home, filePath[1:])
+		}
+	}
+
+	// Create writer
+	var writer writers.Writer
+	switch format {
+	case "dbml":
+		writer = wdbml.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "dctx":
+		writer = wdctx.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "drawdb":
+		writer = wdrawdb.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "graphql":
+		writer = wgraphql.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "json":
+		writer = wjson.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "yaml":
+		writer = wyaml.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "gorm":
+		writer = wgorm.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "bun":
+		writer = wbun.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "drizzle":
+		writer = wdrizzle.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "prisma":
+		writer = wprisma.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "typeorm":
+		writer = wtypeorm.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	case "pgsql":
+		writer = wpgsql.NewWriter(&writers.WriterOptions{OutputPath: filePath})
+	default:
+		se.showErrorDialog("Error", "Unsupported format: "+format)
+		return
+	}
+
+	// Write database
+	err := writer.WriteDatabase(se.db)
+	if err != nil {
+		se.showErrorDialog("Save Error", fmt.Sprintf("Failed to save database: %v", err))
+		return
+	}
+
+	// Store save config
+	se.saveConfig = &SaveConfig{
+		TargetType: format,
+		FilePath:   filePath,
+	}
+
+	// Show success
+	se.showSuccessDialog("Save Complete", fmt.Sprintf("Successfully saved database to %s", filePath), func() {
+		se.pages.RemovePage("save-database")
+		se.pages.SwitchToPage("main")
+	})
+}
+
+// createNewDatabase creates a new empty database
+func (se *SchemaEditor) createNewDatabase() {
+	// Create a new empty database
+	se.db = &models.Database{
+		Name:    "New Database",
+		Schemas: []*models.Schema{},
+	}
+
+	// Clear load config
+	se.loadConfig = nil
+
+	// Show success and switch to main menu
+	se.showSuccessDialog("New Database", "Created new empty database", func() {
+		se.pages.RemovePage("load-database")
+		se.pages.AddPage("main", se.createMainMenu(), true, true)
+	})
+}
+
+// showErrorDialog displays an error dialog
+func (se *SchemaEditor) showErrorDialog(_title, message string) {
+	modal := tview.NewModal().
+		SetText(message).
+		AddButtons([]string{"OK"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			se.pages.RemovePage("error-dialog")
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("error-dialog")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("error-dialog", modal, true, true)
+}
+
+// showSuccessDialog displays a success dialog
+func (se *SchemaEditor) showSuccessDialog(_title, message string, onClose func()) {
+	modal := tview.NewModal().
+		SetText(message).
+		AddButtons([]string{"OK"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			se.pages.RemovePage("success-dialog")
+			if onClose != nil {
+				onClose()
+			}
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("success-dialog")
+			if onClose != nil {
+				onClose()
+			}
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("success-dialog", modal, true, true)
+}
+
+// getLoadHelpText returns the help text for the load screen
+func getLoadHelpText() string {
+	return `File-based formats: dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm
+Database formats: pgsql (requires connection string)
+
+Examples:
+  - File path: ~/schemas/mydb.dbml or /path/to/schema.json
+  - Connection: postgres://user:pass@localhost/dbname`
+}
+
+// showUpdateExistingDatabaseConfirm displays a confirmation dialog before updating existing database
+func (se *SchemaEditor) showUpdateExistingDatabaseConfirm() {
+	// Use saveConfig if available, otherwise use loadConfig
+	var targetType, targetPath string
+	if se.saveConfig != nil {
+		targetType = se.saveConfig.TargetType
+		targetPath = se.saveConfig.FilePath
+	} else if se.loadConfig != nil {
+		targetType = se.loadConfig.SourceType
+		targetPath = se.loadConfig.FilePath
+	} else {
+		return
+	}
+
+	confirmText := fmt.Sprintf("Update existing database?\n\nFormat: %s\nPath: %s\n\nThis will overwrite the source.",
+		targetType, targetPath)
+
+	modal := tview.NewModal().
+		SetText(confirmText).
+		AddButtons([]string{"Cancel", "Update"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			if buttonLabel == "Update" {
+				se.pages.RemovePage("update-confirm")
+				se.pages.RemovePage("save-database")
+				se.saveDatabase(targetType, targetPath)
+				se.pages.SwitchToPage("main")
+			} else {
+				se.pages.RemovePage("update-confirm")
+			}
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("update-confirm")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddAndSwitchToPage("update-confirm", modal, true)
+}
+
+// getSaveHelpText returns the help text for the save screen
+func getSaveHelpText() string {
+	return `File-based formats: dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql (SQL export)
+
+Examples:
+  - File: ~/schemas/mydb.dbml
+  - Directory (for code formats): ./models/`
+}
+
+// showImportScreen displays the import/merge database screen
+func (se *SchemaEditor) showImportScreen() {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText("[::b]Import & Merge Database Schema").
+		SetTextAlign(tview.AlignCenter).
+		SetDynamicColors(true)
+
+	// Form
+	form := tview.NewForm()
+	form.SetBorder(true).SetTitle(" Import Configuration ").SetTitleAlign(tview.AlignLeft)
+
+	// Format selection
+	formatOptions := []string{
+		"dbml", "dctx", "drawdb", "graphql", "json", "yaml",
+		"gorm", "bun", "drizzle", "prisma", "typeorm", "pgsql",
+	}
+	selectedFormat := 0
+	currentFormat := formatOptions[selectedFormat]
+
+	// File path input
+	filePath := ""
+	connString := ""
+	skipDomains := false
+	skipRelations := false
+	skipEnums := false
+	skipViews := false
+	skipSequences := false
+	skipTables := ""
+
+	form.AddDropDown("Format", formatOptions, 0, func(option string, index int) {
+		selectedFormat = index
+		currentFormat = option
+	})
+
+	form.AddInputField("File Path", "", 50, nil, func(value string) {
+		filePath = value
+	})
+
+	form.AddInputField("Connection String", "", 50, nil, func(value string) {
+		connString = value
+	})
+
+	form.AddInputField("Skip Tables (comma-separated)", "", 50, nil, func(value string) {
+		skipTables = value
+	})
+
+	form.AddCheckbox("Skip Domains", false, func(checked bool) {
+		skipDomains = checked
+	})
+
+	form.AddCheckbox("Skip Relations", false, func(checked bool) {
+		skipRelations = checked
+	})
+
+	form.AddCheckbox("Skip Enums", false, func(checked bool) {
+		skipEnums = checked
+	})
+
+	form.AddCheckbox("Skip Views", false, func(checked bool) {
+		skipViews = checked
+	})
+
+	form.AddCheckbox("Skip Sequences", false, func(checked bool) {
+		skipSequences = checked
+	})
+
+	form.AddTextView("Help", getImportHelpText(), 0, 7, true, false)
+
+	// Buttons
+	form.AddButton("Import & Merge [i]", func() {
+		se.importAndMergeDatabase(currentFormat, filePath, connString, skipDomains, skipRelations, skipEnums, skipViews, skipSequences, skipTables)
+	})
+
+	form.AddButton("Back [b]", func() {
+		se.pages.RemovePage("import-database")
+		se.pages.SwitchToPage("main")
+	})
+
+	form.AddButton("Exit [q]", func() {
+		se.app.Stop()
+	})
+
+	// Keyboard shortcuts
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("import-database")
+			se.pages.SwitchToPage("main")
+			return nil
+		}
+		switch event.Rune() {
+		case 'i':
+			se.importAndMergeDatabase(currentFormat, filePath, connString, skipDomains, skipRelations, skipEnums, skipViews, skipSequences, skipTables)
+			return nil
+		case 'b':
+			se.pages.RemovePage("import-database")
+			se.pages.SwitchToPage("main")
+			return nil
+		case 'q':
+			se.app.Stop()
+			return nil
+		}
+		return event
+	})
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(form, 0, 1, true)
+
+	se.pages.AddAndSwitchToPage("import-database", flex, true)
+}
+
+// importAndMergeDatabase imports and merges a database from the specified configuration
+func (se *SchemaEditor) importAndMergeDatabase(format, filePath, connString string, skipDomains, skipRelations, skipEnums, skipViews, skipSequences bool, skipTables string) {
+	// Validate input
+	if format == "pgsql" {
+		if connString == "" {
+			se.showErrorDialog("Error", "Connection string is required for PostgreSQL")
+			return
+		}
+	} else {
+		if filePath == "" {
+			se.showErrorDialog("Error", "File path is required for "+format)
+			return
+		}
+		// Expand home directory
+		if len(filePath) > 0 && filePath[0] == '~' {
+			home, err := os.UserHomeDir()
+			if err == nil {
+				filePath = filepath.Join(home, filePath[1:])
+			}
+		}
+	}
+
+	// Create reader
+	var reader readers.Reader
+	switch format {
+	case "dbml":
+		reader = rdbml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "dctx":
+		reader = rdctx.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drawdb":
+		reader = rdrawdb.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "graphql":
+		reader = rgraphql.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "json":
+		reader = rjson.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "yaml":
+		reader = ryaml.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "gorm":
+		reader = rgorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "bun":
+		reader = rbun.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "drizzle":
+		reader = rdrizzle.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "prisma":
+		reader = rprisma.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "typeorm":
+		reader = rtypeorm.NewReader(&readers.ReaderOptions{FilePath: filePath})
+	case "pgsql":
+		reader = rpgsql.NewReader(&readers.ReaderOptions{ConnectionString: connString})
+	default:
+		se.showErrorDialog("Error", "Unsupported format: "+format)
+		return
+	}
+
+	// Read the database to import
+	importDb, err := reader.ReadDatabase()
+	if err != nil {
+		se.showErrorDialog("Import Error", fmt.Sprintf("Failed to read database: %v", err))
+		return
+	}
+
+	// Show confirmation dialog
+	se.showImportConfirmation(importDb, skipDomains, skipRelations, skipEnums, skipViews, skipSequences, skipTables)
+}
+
+// showImportConfirmation shows a confirmation dialog before merging
+func (se *SchemaEditor) showImportConfirmation(importDb *models.Database, skipDomains, skipRelations, skipEnums, skipViews, skipSequences bool, skipTables string) {
+	confirmText := fmt.Sprintf("Import & Merge Database?\n\nSource: %s\nTarget: %s\n\nThis will add missing schemas, tables, columns, and other objects from the source to your database.\n\nExisting items will NOT be modified.",
+		importDb.Name, se.db.Name)
+
+	modal := tview.NewModal().
+		SetText(confirmText).
+		AddButtons([]string{"Cancel", "Merge"}).
+		SetDoneFunc(func(buttonIndex int, buttonLabel string) {
+			se.pages.RemovePage("import-confirm")
+			if buttonLabel == "Merge" {
+				se.performMerge(importDb, skipDomains, skipRelations, skipEnums, skipViews, skipSequences, skipTables)
+			}
+		})
+
+	modal.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("import-confirm")
+			se.pages.SwitchToPage("import-database")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddAndSwitchToPage("import-confirm", modal, true)
+}
+
+// performMerge performs the actual merge operation
+func (se *SchemaEditor) performMerge(importDb *models.Database, skipDomains, skipRelations, skipEnums, skipViews, skipSequences bool, skipTables string) {
+	// Create merge options
+	opts := &merge.MergeOptions{
+		SkipDomains:   skipDomains,
+		SkipRelations: skipRelations,
+		SkipEnums:     skipEnums,
+		SkipViews:     skipViews,
+		SkipSequences: skipSequences,
+	}
+
+	// Parse skip tables
+	if skipTables != "" {
+		opts.SkipTableNames = parseSkipTablesUI(skipTables)
+	}
+
+	// Perform the merge
+	result := merge.MergeDatabases(se.db, importDb, opts)
+
+	// Update the database timestamp
+	se.db.UpdateDate()
+
+	// Show success dialog with summary
+	summary := merge.GetMergeSummary(result)
+	se.showSuccessDialog("Import Complete", summary, func() {
+		se.pages.RemovePage("import-database")
+		se.pages.RemovePage("main")
+		se.pages.AddPage("main", se.createMainMenu(), true, true)
+	})
+}
+
+// getImportHelpText returns the help text for the import screen
+func getImportHelpText() string {
+	return `Import & Merge: Adds missing schemas, tables, columns, and other objects to your existing database.
+
+File-based formats: dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm
+Database formats: pgsql (requires connection string)
+
+Skip options: Check to exclude specific object types from the merge.`
+}
+
+func parseSkipTablesUI(skipTablesStr string) map[string]bool {
+	skipTables := make(map[string]bool)
+	if skipTablesStr == "" {
+		return skipTables
+	}
+
+	// Split by comma and trim whitespace
+	parts := strings.Split(skipTablesStr, ",")
+	for _, part := range parts {
+		trimmed := strings.TrimSpace(part)
+		if trimmed != "" {
+			// Store in lowercase for case-insensitive matching
+			skipTables[strings.ToLower(trimmed)] = true
+		}
+	}
+
+	return skipTables
+}

pkg/ui/main_menu.go

@@ -0,0 +1,65 @@
+package ui
+
+import (
+	"fmt"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+)
+
+// createMainMenu creates the main menu screen
+func (se *SchemaEditor) createMainMenu() tview.Primitive {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title with database name
+	dbName := se.db.Name
+	if dbName == "" {
+		dbName = "Untitled"
+	}
+	updateAtStr := ""
+	if se.db.UpdatedAt != "" {
+		updateAtStr = fmt.Sprintf("Updated @ %s", se.db.UpdatedAt)
+	}
+	titleText := fmt.Sprintf("[::b]RelSpec Schema Editor\n[::d]Database: %s %s\n[::d]Press arrow keys to navigate, Enter to select", dbName, updateAtStr)
+	title := tview.NewTextView().
+		SetText(titleText).
+		SetDynamicColors(true)
+
+	// Menu options
+	menu := tview.NewList().
+		AddItem("Edit Database", "Edit database name, description, and properties", 'e', func() {
+			se.showEditDatabaseForm()
+		}).
+		AddItem("Manage Schemas", "View, create, edit, and delete schemas", 's', func() {
+			se.showSchemaList()
+		}).
+		AddItem("Manage Tables", "View and manage tables in schemas", 't', func() {
+			se.showTableList()
+		}).
+		AddItem("Manage Domains", "View, create, edit, and delete domains", 'd', func() {
+			se.showDomainList()
+		}).
+		AddItem("Import & Merge", "Import and merge schema from another database", 'i', func() {
+			se.showImportScreen()
+		}).
+		AddItem("Save Database", "Save database to file or database", 'w', func() {
+			se.showSaveScreen()
+		}).
+		AddItem("Exit Editor", "Exit the editor", 'q', func() {
+			se.app.Stop()
+		})
+
+	menu.SetBorder(true).SetTitle(" Menu ").SetTitleAlign(tview.AlignLeft)
+	menu.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitEditorConfirm()
+			return nil
+		}
+		return event
+	})
+
+	flex.AddItem(title, 5, 0, false).
+		AddItem(menu, 0, 1, true)
+
+	return flex
+}

pkg/ui/schema_dataops.go

@@ -0,0 +1,55 @@
+package ui
+
+import "git.warky.dev/wdevs/relspecgo/pkg/models"
+
+// Schema data operations - business logic for schema management
+
+// CreateSchema creates a new schema and adds it to the database
+func (se *SchemaEditor) CreateSchema(name, description string) *models.Schema {
+	newSchema := &models.Schema{
+		Name:        name,
+		Description: description,
+		Tables:      make([]*models.Table, 0),
+		Sequences:   make([]*models.Sequence, 0),
+		Enums:       make([]*models.Enum, 0),
+	}
+	se.db.UpdateDate()
+	se.db.Schemas = append(se.db.Schemas, newSchema)
+	return newSchema
+}
+
+// UpdateSchema updates an existing schema's properties
+func (se *SchemaEditor) UpdateSchema(schemaIndex int, name, owner, description string) {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return
+	}
+	se.db.UpdateDate()
+	schema := se.db.Schemas[schemaIndex]
+	schema.Name = name
+	schema.Owner = owner
+	schema.Description = description
+	schema.UpdateDate()
+}
+
+// DeleteSchema removes a schema from the database
+func (se *SchemaEditor) DeleteSchema(schemaIndex int) bool {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return false
+	}
+	se.db.UpdateDate()
+	se.db.Schemas = append(se.db.Schemas[:schemaIndex], se.db.Schemas[schemaIndex+1:]...)
+	return true
+}
+
+// GetSchema returns a schema by index
+func (se *SchemaEditor) GetSchema(schemaIndex int) *models.Schema {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return nil
+	}
+	return se.db.Schemas[schemaIndex]
+}
+
+// GetAllSchemas returns all schemas
+func (se *SchemaEditor) GetAllSchemas() []*models.Schema {
+	return se.db.Schemas
+}

pkg/ui/schema_screens.go

@@ -0,0 +1,362 @@
+package ui
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// showSchemaList displays the schema management screen
+func (se *SchemaEditor) showSchemaList() {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText("[::b]Manage Schemas").
+		SetDynamicColors(true).
+		SetTextAlign(tview.AlignCenter)
+
+	// Create schemas table
+	schemaTable := tview.NewTable().SetBorders(true).SetSelectable(true, false).SetFixed(1, 0)
+
+	// Add header row with padding for full width
+	headers := []string{"Name", "Sequence", "Total Tables", "Total Sequences", "Total Views", "GUID", "Description"}
+	headerWidths := []int{20, 15, 20, 20, 15, 36} // Last column takes remaining space
+	for i, header := range headers {
+		padding := ""
+		if i < len(headerWidths) {
+			padding = strings.Repeat(" ", headerWidths[i]-len(header))
+		}
+		cell := tview.NewTableCell(header + padding).
+			SetTextColor(tcell.ColorYellow).
+			SetSelectable(false).
+			SetAlign(tview.AlignLeft)
+		schemaTable.SetCell(0, i, cell)
+	}
+
+	// Add existing schemas
+	for row, schema := range se.db.Schemas {
+		schema := schema // capture for closure
+
+		// Name - pad to 20 chars
+		nameStr := fmt.Sprintf("%-20s", schema.Name)
+		nameCell := tview.NewTableCell(nameStr).SetSelectable(true)
+		schemaTable.SetCell(row+1, 0, nameCell)
+
+		// Sequence - pad to 15 chars
+		seqStr := fmt.Sprintf("%-15s", fmt.Sprintf("%d", schema.Sequence))
+		seqCell := tview.NewTableCell(seqStr).SetSelectable(true)
+		schemaTable.SetCell(row+1, 1, seqCell)
+
+		// Total Tables - pad to 20 chars
+		tablesStr := fmt.Sprintf("%-20s", fmt.Sprintf("%d", len(schema.Tables)))
+		tablesCell := tview.NewTableCell(tablesStr).SetSelectable(true)
+		schemaTable.SetCell(row+1, 2, tablesCell)
+
+		// Total Sequences - pad to 20 chars
+		sequencesStr := fmt.Sprintf("%-20s", fmt.Sprintf("%d", len(schema.Sequences)))
+		sequencesCell := tview.NewTableCell(sequencesStr).SetSelectable(true)
+		schemaTable.SetCell(row+1, 3, sequencesCell)
+
+		// Total Views - pad to 15 chars
+		viewsStr := fmt.Sprintf("%-15s", fmt.Sprintf("%d", len(schema.Views)))
+		viewsCell := tview.NewTableCell(viewsStr).SetSelectable(true)
+		schemaTable.SetCell(row+1, 4, viewsCell)
+
+		// GUID - pad to 36 chars
+		guidStr := fmt.Sprintf("%-36s", schema.GUID)
+		guidCell := tview.NewTableCell(guidStr).SetSelectable(true)
+		schemaTable.SetCell(row+1, 5, guidCell)
+
+		// Description - no padding, takes remaining space
+		descCell := tview.NewTableCell(schema.Description).SetSelectable(true)
+		schemaTable.SetCell(row+1, 6, descCell)
+	}
+
+	schemaTable.SetTitle(" Schemas ").SetBorder(true).SetTitleAlign(tview.AlignLeft)
+
+	// Action buttons flex (define before input capture)
+	btnFlex := tview.NewFlex()
+	btnNewSchema := tview.NewButton("New Schema [n]").SetSelectedFunc(func() {
+		se.showNewSchemaDialog()
+	})
+	btnBack := tview.NewButton("Back [b]").SetSelectedFunc(func() {
+		se.pages.SwitchToPage("main")
+		se.pages.RemovePage("schemas")
+	})
+
+	// Set up button input captures for Tab/Shift+Tab navigation
+	btnNewSchema.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(schemaTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnBack)
+			return nil
+		}
+		return event
+	})
+
+	btnBack.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnNewSchema)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(schemaTable)
+			return nil
+		}
+		return event
+	})
+
+	btnFlex.AddItem(btnNewSchema, 0, 1, true).
+		AddItem(btnBack, 0, 1, false)
+
+	schemaTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.SwitchToPage("main")
+			se.pages.RemovePage("schemas")
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnNewSchema)
+			return nil
+		}
+		if event.Key() == tcell.KeyEnter {
+			row, _ := schemaTable.GetSelection()
+			if row > 0 && row <= len(se.db.Schemas) { // Skip header row
+				schemaIndex := row - 1
+				se.showSchemaEditor(schemaIndex, se.db.Schemas[schemaIndex])
+				return nil
+			}
+		}
+		if event.Rune() == 'n' {
+			se.showNewSchemaDialog()
+			return nil
+		}
+		if event.Rune() == 'b' {
+			se.pages.SwitchToPage("main")
+			se.pages.RemovePage("schemas")
+			return nil
+		}
+		return event
+	})
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(schemaTable, 0, 1, true).
+		AddItem(btnFlex, 1, 0, false)
+
+	se.pages.AddPage("schemas", flex, true, true)
+}
+
+// showSchemaEditor shows the editor for a specific schema
+func (se *SchemaEditor) showSchemaEditor(index int, schema *models.Schema) {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText(fmt.Sprintf("[::b]Schema: %s", schema.Name)).
+		SetDynamicColors(true).
+		SetTextAlign(tview.AlignCenter)
+
+	// Schema info display
+	info := tview.NewTextView().SetDynamicColors(true)
+	info.SetText(fmt.Sprintf("Tables: %d | Description: %s",
+		len(schema.Tables), schema.Description))
+
+	// Table list
+	tableList := tview.NewList().ShowSecondaryText(true)
+
+	for i, table := range schema.Tables {
+		tableIndex := i
+		table := table
+		colCount := len(table.Columns)
+		tableList.AddItem(table.Name, fmt.Sprintf("%d columns", colCount), rune('0'+i), func() {
+			se.showTableEditor(index, tableIndex, table)
+		})
+	}
+
+	tableList.AddItem("[New Table]", "Add a new table to this schema", 'n', func() {
+		se.showNewTableDialog(index)
+	})
+
+	tableList.AddItem("[Edit Schema Info]", "Edit schema properties", 'e', func() {
+		se.showEditSchemaDialog(index)
+	})
+
+	tableList.AddItem("[Delete Schema]", "Delete this schema", 'd', func() {
+		se.showDeleteSchemaConfirm(index)
+	})
+
+	tableList.SetBorder(true).SetTitle(" Tables ").SetTitleAlign(tview.AlignLeft)
+
+	// Action buttons (define before input capture)
+	btnFlex := tview.NewFlex()
+	btnNewTable := tview.NewButton("New Table [n]").SetSelectedFunc(func() {
+		se.showNewTableDialog(index)
+	})
+	btnBack := tview.NewButton("Back to Schemas [b]").SetSelectedFunc(func() {
+		se.pages.RemovePage("schema-editor")
+		se.pages.SwitchToPage("schemas")
+	})
+
+	// Set up button input captures for Tab/Shift+Tab navigation
+	btnNewTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(tableList)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnBack)
+			return nil
+		}
+		return event
+	})
+
+	btnBack.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnNewTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(tableList)
+			return nil
+		}
+		return event
+	})
+
+	tableList.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.RemovePage("schema-editor")
+			se.pages.SwitchToPage("schemas")
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnNewTable)
+			return nil
+		}
+		if event.Rune() == 'b' {
+			se.pages.RemovePage("schema-editor")
+			se.pages.SwitchToPage("schemas")
+		}
+		return event
+	})
+
+	btnFlex.AddItem(btnNewTable, 0, 1, true).
+		AddItem(btnBack, 0, 1, false)
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(info, 2, 0, false).
+		AddItem(tableList, 0, 1, true).
+		AddItem(btnFlex, 1, 0, false)
+
+	se.pages.AddPage("schema-editor", flex, true, true)
+}
+
+// showNewSchemaDialog shows dialog to create a new schema
+func (se *SchemaEditor) showNewSchemaDialog() {
+	form := tview.NewForm()
+
+	schemaName := ""
+	description := ""
+
+	form.AddInputField("Schema Name", "", 40, nil, func(value string) {
+		schemaName = value
+	})
+
+	form.AddInputField("Description", "", 40, nil, func(value string) {
+		description = value
+	})
+
+	form.AddButton("Save", func() {
+		if schemaName == "" {
+			return
+		}
+
+		se.CreateSchema(schemaName, description)
+
+		se.pages.RemovePage("new-schema")
+		se.pages.RemovePage("schemas")
+		se.showSchemaList()
+	})
+
+	form.AddButton("Back", func() {
+		se.pages.RemovePage("new-schema")
+		se.pages.RemovePage("schemas")
+		se.showSchemaList()
+	})
+
+	form.SetBorder(true).SetTitle(" New Schema ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("new-schema", "schemas")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("new-schema", form, true, true)
+}
+
+// showEditSchemaDialog shows dialog to edit schema properties
+func (se *SchemaEditor) showEditSchemaDialog(schemaIndex int) {
+	schema := se.db.Schemas[schemaIndex]
+	form := tview.NewForm()
+
+	// Local variables to collect changes
+	newName := schema.Name
+	newOwner := schema.Owner
+	newDescription := schema.Description
+	newGUID := schema.GUID
+
+	form.AddInputField("Schema Name", schema.Name, 40, nil, func(value string) {
+		newName = value
+	})
+
+	form.AddInputField("Owner", schema.Owner, 40, nil, func(value string) {
+		newOwner = value
+	})
+
+	form.AddTextArea("Description", schema.Description, 40, 5, 0, func(value string) {
+		newDescription = value
+	})
+
+	form.AddInputField("GUID", schema.GUID, 40, nil, func(value string) {
+		newGUID = value
+	})
+
+	form.AddButton("Save", func() {
+		// Apply changes using dataops
+		se.UpdateSchema(schemaIndex, newName, newOwner, newDescription)
+		se.db.Schemas[schemaIndex].GUID = newGUID
+
+		schema := se.db.Schemas[schemaIndex]
+		se.pages.RemovePage("edit-schema")
+		se.pages.RemovePage("schema-editor")
+		se.showSchemaEditor(schemaIndex, schema)
+	})
+
+	form.AddButton("Back", func() {
+		// Discard changes - don't apply them
+		schema := se.db.Schemas[schemaIndex]
+		se.pages.RemovePage("edit-schema")
+		se.pages.RemovePage("schema-editor")
+		se.showSchemaEditor(schemaIndex, schema)
+	})
+
+	form.SetBorder(true).SetTitle(" Edit Schema ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("edit-schema", "schema-editor")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("edit-schema", form, true, true)
+}

pkg/ui/table_dataops.go

@@ -0,0 +1,88 @@
+package ui
+
+import "git.warky.dev/wdevs/relspecgo/pkg/models"
+
+// Table data operations - business logic for table management
+
+// CreateTable creates a new table and adds it to a schema
+func (se *SchemaEditor) CreateTable(schemaIndex int, name, description string) *models.Table {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return nil
+	}
+
+	schema := se.db.Schemas[schemaIndex]
+	newTable := &models.Table{
+		Name:        name,
+		Schema:      schema.Name,
+		Description: description,
+		Columns:     make(map[string]*models.Column),
+		Constraints: make(map[string]*models.Constraint),
+		Indexes:     make(map[string]*models.Index),
+	}
+	schema.UpdateDate()
+	schema.Tables = append(schema.Tables, newTable)
+	return newTable
+}
+
+// UpdateTable updates an existing table's properties
+func (se *SchemaEditor) UpdateTable(schemaIndex, tableIndex int, name, description string) {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return
+	}
+
+	schema := se.db.Schemas[schemaIndex]
+	if tableIndex < 0 || tableIndex >= len(schema.Tables) {
+		return
+	}
+	schema.UpdateDate()
+	table := schema.Tables[tableIndex]
+	table.Name = name
+	table.Description = description
+	table.UpdateDate()
+}
+
+// DeleteTable removes a table from a schema
+func (se *SchemaEditor) DeleteTable(schemaIndex, tableIndex int) bool {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return false
+	}
+
+	schema := se.db.Schemas[schemaIndex]
+	if tableIndex < 0 || tableIndex >= len(schema.Tables) {
+		return false
+	}
+	schema.UpdateDate()
+	schema.Tables = append(schema.Tables[:tableIndex], schema.Tables[tableIndex+1:]...)
+	return true
+}
+
+// GetTable returns a table by schema and table index
+func (se *SchemaEditor) GetTable(schemaIndex, tableIndex int) *models.Table {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return nil
+	}
+
+	schema := se.db.Schemas[schemaIndex]
+	if tableIndex < 0 || tableIndex >= len(schema.Tables) {
+		return nil
+	}
+
+	return schema.Tables[tableIndex]
+}
+
+// GetAllTables returns all tables across all schemas
+func (se *SchemaEditor) GetAllTables() []*models.Table {
+	var tables []*models.Table
+	for _, schema := range se.db.Schemas {
+		tables = append(tables, schema.Tables...)
+	}
+	return tables
+}
+
+// GetTablesInSchema returns all tables in a specific schema
+func (se *SchemaEditor) GetTablesInSchema(schemaIndex int) []*models.Table {
+	if schemaIndex < 0 || schemaIndex >= len(se.db.Schemas) {
+		return nil
+	}
+	return se.db.Schemas[schemaIndex].Tables
+}

pkg/ui/table_screens.go

@@ -0,0 +1,546 @@
+package ui
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/gdamore/tcell/v2"
+	"github.com/rivo/tview"
+
+	"git.warky.dev/wdevs/relspecgo/pkg/models"
+)
+
+// showTableList displays all tables across all schemas
+func (se *SchemaEditor) showTableList() {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText("[::b]All Tables").
+		SetDynamicColors(true).
+		SetTextAlign(tview.AlignCenter)
+
+	// Create tables table
+	tableTable := tview.NewTable().SetBorders(true).SetSelectable(true, false).SetFixed(1, 0)
+
+	// Add header row with padding for full width
+	headers := []string{"Name", "Schema", "Sequence", "Total Columns", "Total Relations", "Total Indexes", "GUID", "Description", "Comment"}
+	headerWidths := []int{18, 15, 12, 14, 15, 14, 36, 0, 12} // Description gets remainder
+	for i, header := range headers {
+		padding := ""
+		if i < len(headerWidths) && headerWidths[i] > 0 {
+			padding = strings.Repeat(" ", headerWidths[i]-len(header))
+		}
+		cell := tview.NewTableCell(header + padding).
+			SetTextColor(tcell.ColorYellow).
+			SetSelectable(false).
+			SetAlign(tview.AlignLeft)
+		tableTable.SetCell(0, i, cell)
+	}
+
+	var tables []*models.Table
+	var tableLocations []struct{ schemaIdx, tableIdx int }
+
+	for si, schema := range se.db.Schemas {
+		for ti, table := range schema.Tables {
+			tables = append(tables, table)
+			tableLocations = append(tableLocations, struct{ schemaIdx, tableIdx int }{si, ti})
+		}
+	}
+
+	for row, table := range tables {
+		tableIdx := tableLocations[row]
+		schema := se.db.Schemas[tableIdx.schemaIdx]
+
+		// Name - pad to 18 chars
+		nameStr := fmt.Sprintf("%-18s", table.Name)
+		nameCell := tview.NewTableCell(nameStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 0, nameCell)
+
+		// Schema - pad to 15 chars
+		schemaStr := fmt.Sprintf("%-15s", schema.Name)
+		schemaCell := tview.NewTableCell(schemaStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 1, schemaCell)
+
+		// Sequence - pad to 12 chars
+		seqStr := fmt.Sprintf("%-12s", fmt.Sprintf("%d", table.Sequence))
+		seqCell := tview.NewTableCell(seqStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 2, seqCell)
+
+		// Total Columns - pad to 14 chars
+		colsStr := fmt.Sprintf("%-14s", fmt.Sprintf("%d", len(table.Columns)))
+		colsCell := tview.NewTableCell(colsStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 3, colsCell)
+
+		// Total Relations - pad to 15 chars
+		relsStr := fmt.Sprintf("%-15s", fmt.Sprintf("%d", len(table.Relationships)))
+		relsCell := tview.NewTableCell(relsStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 4, relsCell)
+
+		// Total Indexes - pad to 14 chars
+		idxStr := fmt.Sprintf("%-14s", fmt.Sprintf("%d", len(table.Indexes)))
+		idxCell := tview.NewTableCell(idxStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 5, idxCell)
+
+		// GUID - pad to 36 chars
+		guidStr := fmt.Sprintf("%-36s", table.GUID)
+		guidCell := tview.NewTableCell(guidStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 6, guidCell)
+
+		// Description - no padding, takes remaining space
+		descCell := tview.NewTableCell(table.Description).SetSelectable(true)
+		tableTable.SetCell(row+1, 7, descCell)
+
+		// Comment - pad to 12 chars
+		commentStr := fmt.Sprintf("%-12s", table.Comment)
+		commentCell := tview.NewTableCell(commentStr).SetSelectable(true)
+		tableTable.SetCell(row+1, 8, commentCell)
+	}
+
+	tableTable.SetTitle(" All Tables ").SetBorder(true).SetTitleAlign(tview.AlignLeft)
+
+	// Action buttons (define before input capture)
+	btnFlex := tview.NewFlex()
+	btnNewTable := tview.NewButton("New Table [n]").SetSelectedFunc(func() {
+		se.showNewTableDialogFromList()
+	})
+	btnBack := tview.NewButton("Back [b]").SetSelectedFunc(func() {
+		se.pages.SwitchToPage("main")
+		se.pages.RemovePage("tables")
+	})
+
+	// Set up button input captures for Tab/Shift+Tab navigation
+	btnNewTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(tableTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnBack)
+			return nil
+		}
+		return event
+	})
+
+	btnBack.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnNewTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(tableTable)
+			return nil
+		}
+		return event
+	})
+
+	btnFlex.AddItem(btnNewTable, 0, 1, true).
+		AddItem(btnBack, 0, 1, false)
+
+	tableTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.SwitchToPage("main")
+			se.pages.RemovePage("tables")
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnNewTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyEnter {
+			row, _ := tableTable.GetSelection()
+			if row > 0 && row <= len(tables) { // Skip header row
+				tableIdx := tableLocations[row-1]
+				se.showTableEditor(tableIdx.schemaIdx, tableIdx.tableIdx, tables[row-1])
+				return nil
+			}
+		}
+		if event.Rune() == 'n' {
+			se.showNewTableDialogFromList()
+			return nil
+		}
+		if event.Rune() == 'b' {
+			se.pages.SwitchToPage("main")
+			se.pages.RemovePage("tables")
+			return nil
+		}
+		return event
+	})
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(tableTable, 0, 1, true).
+		AddItem(btnFlex, 1, 0, false)
+
+	se.pages.AddPage("tables", flex, true, true)
+}
+
+// showTableEditor shows editor for a specific table
+func (se *SchemaEditor) showTableEditor(schemaIndex, tableIndex int, table *models.Table) {
+	flex := tview.NewFlex().SetDirection(tview.FlexRow)
+
+	// Title
+	title := tview.NewTextView().
+		SetText(fmt.Sprintf("[::b]Table: %s", table.Name)).
+		SetDynamicColors(true).
+		SetTextAlign(tview.AlignCenter)
+
+	// Table info
+	info := tview.NewTextView().SetDynamicColors(true)
+	info.SetText(fmt.Sprintf("Schema: %s | Columns: %d | Description: %s",
+		table.Schema, len(table.Columns), table.Description))
+
+	// Create columns table
+	colTable := tview.NewTable().SetBorders(true).SetSelectable(true, false).SetFixed(1, 0)
+
+	// Add header row with padding for full width
+	headers := []string{"Name", "Type", "Default", "KeyType", "GUID", "Description"}
+	headerWidths := []int{20, 18, 15, 15, 36} // Last column takes remaining space
+	for i, header := range headers {
+		padding := ""
+		if i < len(headerWidths) {
+			padding = strings.Repeat(" ", headerWidths[i]-len(header))
+		}
+		cell := tview.NewTableCell(header + padding).
+			SetTextColor(tcell.ColorYellow).
+			SetSelectable(false).
+			SetAlign(tview.AlignLeft)
+		colTable.SetCell(0, i, cell)
+	}
+
+	// Get sorted column names
+	columnNames := getColumnNames(table)
+	for row, colName := range columnNames {
+		column := table.Columns[colName]
+
+		// Name - pad to 20 chars
+		nameStr := fmt.Sprintf("%-20s", colName)
+		nameCell := tview.NewTableCell(nameStr).SetSelectable(true)
+		colTable.SetCell(row+1, 0, nameCell)
+
+		// Type - pad to 18 chars
+		typeStr := fmt.Sprintf("%-18s", column.Type)
+		typeCell := tview.NewTableCell(typeStr).SetSelectable(true)
+		colTable.SetCell(row+1, 1, typeCell)
+
+		// Default - pad to 15 chars
+		defaultStr := ""
+		if column.Default != nil {
+			defaultStr = fmt.Sprintf("%v", column.Default)
+		}
+		defaultStr = fmt.Sprintf("%-15s", defaultStr)
+		defaultCell := tview.NewTableCell(defaultStr).SetSelectable(true)
+		colTable.SetCell(row+1, 2, defaultCell)
+
+		// KeyType - pad to 15 chars
+		keyTypeStr := ""
+		if column.IsPrimaryKey {
+			keyTypeStr = "PRIMARY"
+		} else if column.NotNull {
+			keyTypeStr = "NOT NULL"
+		}
+		keyTypeStr = fmt.Sprintf("%-15s", keyTypeStr)
+		keyTypeCell := tview.NewTableCell(keyTypeStr).SetSelectable(true)
+		colTable.SetCell(row+1, 3, keyTypeCell)
+
+		// GUID - pad to 36 chars
+		guidStr := fmt.Sprintf("%-36s", column.GUID)
+		guidCell := tview.NewTableCell(guidStr).SetSelectable(true)
+		colTable.SetCell(row+1, 4, guidCell)
+
+		// Description
+		descCell := tview.NewTableCell(column.Description).SetSelectable(true)
+		colTable.SetCell(row+1, 5, descCell)
+	}
+
+	colTable.SetTitle(" Columns ").SetBorder(true).SetTitleAlign(tview.AlignLeft)
+
+	// Action buttons flex (define before input capture)
+	btnFlex := tview.NewFlex()
+	btnNewCol := tview.NewButton("Add Column [n]").SetSelectedFunc(func() {
+		se.showNewColumnDialog(schemaIndex, tableIndex)
+	})
+	btnEditTable := tview.NewButton("Edit Table [e]").SetSelectedFunc(func() {
+		se.showEditTableDialog(schemaIndex, tableIndex)
+	})
+	btnEditColumn := tview.NewButton("Edit Column [c]").SetSelectedFunc(func() {
+		row, _ := colTable.GetSelection()
+		if row > 0 && row <= len(columnNames) { // Skip header row
+			colName := columnNames[row-1]
+			column := table.Columns[colName]
+			se.showColumnEditor(schemaIndex, tableIndex, row-1, column)
+		}
+	})
+	btnDelTable := tview.NewButton("Delete Table [d]").SetSelectedFunc(func() {
+		se.showDeleteTableConfirm(schemaIndex, tableIndex)
+	})
+	btnBack := tview.NewButton("Back to Schema [b]").SetSelectedFunc(func() {
+		se.pages.RemovePage("table-editor")
+		se.pages.SwitchToPage("schema-editor")
+	})
+
+	// Set up button input captures for Tab/Shift+Tab navigation
+	btnNewCol.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(colTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnEditColumn)
+			return nil
+		}
+		return event
+	})
+
+	btnEditColumn.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnNewCol)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnEditTable)
+			return nil
+		}
+		return event
+	})
+
+	btnEditTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnEditColumn)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnDelTable)
+			return nil
+		}
+		return event
+	})
+
+	btnDelTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnEditTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnBack)
+			return nil
+		}
+		return event
+	})
+
+	btnBack.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyBacktab {
+			se.app.SetFocus(btnDelTable)
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(colTable)
+			return nil
+		}
+		return event
+	})
+
+	btnFlex.AddItem(btnNewCol, 0, 1, true).
+		AddItem(btnEditColumn, 0, 1, false).
+		AddItem(btnEditTable, 0, 1, false).
+		AddItem(btnDelTable, 0, 1, false).
+		AddItem(btnBack, 0, 1, false)
+
+	colTable.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.pages.SwitchToPage("schema-editor")
+			se.pages.RemovePage("table-editor")
+			return nil
+		}
+		if event.Key() == tcell.KeyTab {
+			se.app.SetFocus(btnNewCol)
+			return nil
+		}
+		if event.Key() == tcell.KeyEnter {
+			row, _ := colTable.GetSelection()
+			if row > 0 { // Skip header row
+				colName := columnNames[row-1]
+				column := table.Columns[colName]
+				se.showColumnEditor(schemaIndex, tableIndex, row-1, column)
+				return nil
+			}
+		}
+		if event.Rune() == 'c' {
+			row, _ := colTable.GetSelection()
+			if row > 0 && row <= len(columnNames) { // Skip header row
+				colName := columnNames[row-1]
+				column := table.Columns[colName]
+				se.showColumnEditor(schemaIndex, tableIndex, row-1, column)
+			}
+			return nil
+		}
+		if event.Rune() == 'b' {
+			se.pages.RemovePage("table-editor")
+			se.pages.SwitchToPage("schema-editor")
+			return nil
+		}
+		return event
+	})
+
+	flex.AddItem(title, 1, 0, false).
+		AddItem(info, 2, 0, false).
+		AddItem(colTable, 0, 1, true).
+		AddItem(btnFlex, 1, 0, false)
+
+	se.pages.AddPage("table-editor", flex, true, true)
+}
+
+// showNewTableDialog shows dialog to create a new table
+func (se *SchemaEditor) showNewTableDialog(schemaIndex int) {
+	form := tview.NewForm()
+
+	tableName := ""
+	description := ""
+
+	form.AddInputField("Table Name", "", 40, nil, func(value string) {
+		tableName = value
+	})
+
+	form.AddInputField("Description", "", 40, nil, func(value string) {
+		description = value
+	})
+
+	form.AddButton("Save", func() {
+		if tableName == "" {
+			return
+		}
+
+		se.CreateTable(schemaIndex, tableName, description)
+
+		schema := se.db.Schemas[schemaIndex]
+		se.pages.RemovePage("new-table")
+		se.pages.RemovePage("schema-editor")
+		se.showSchemaEditor(schemaIndex, schema)
+	})
+
+	form.AddButton("Back", func() {
+		schema := se.db.Schemas[schemaIndex]
+		se.pages.RemovePage("new-table")
+		se.pages.RemovePage("schema-editor")
+		se.showSchemaEditor(schemaIndex, schema)
+	})
+
+	form.SetBorder(true).SetTitle(" New Table ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("new-table", "schema-editor")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("new-table", form, true, true)
+}
+
+// showNewTableDialogFromList shows dialog to create a new table with schema selection
+func (se *SchemaEditor) showNewTableDialogFromList() {
+	form := tview.NewForm()
+
+	tableName := ""
+	description := ""
+	selectedSchemaIdx := 0
+
+	// Create schema dropdown options
+	schemaOptions := make([]string, len(se.db.Schemas))
+	for i, schema := range se.db.Schemas {
+		schemaOptions[i] = schema.Name
+	}
+
+	form.AddInputField("Table Name", "", 40, nil, func(value string) {
+		tableName = value
+	})
+
+	form.AddDropDown("Schema", schemaOptions, 0, func(option string, optionIndex int) {
+		selectedSchemaIdx = optionIndex
+	})
+
+	form.AddInputField("Description", "", 40, nil, func(value string) {
+		description = value
+	})
+
+	form.AddButton("Save", func() {
+		if tableName == "" {
+			return
+		}
+
+		se.CreateTable(selectedSchemaIdx, tableName, description)
+
+		se.pages.RemovePage("new-table-from-list")
+		se.pages.RemovePage("tables")
+		se.showTableList()
+	})
+
+	form.AddButton("Back", func() {
+		se.pages.RemovePage("new-table-from-list")
+		se.pages.RemovePage("tables")
+		se.showTableList()
+	})
+
+	form.SetBorder(true).SetTitle(" New Table ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("new-table-from-list", "tables")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("new-table-from-list", form, true, true)
+}
+
+// showEditTableDialog shows dialog to edit table properties
+func (se *SchemaEditor) showEditTableDialog(schemaIndex, tableIndex int) {
+	table := se.db.Schemas[schemaIndex].Tables[tableIndex]
+	form := tview.NewForm()
+
+	// Local variables to collect changes
+	newName := table.Name
+	newDescription := table.Description
+	newGUID := table.GUID
+
+	form.AddInputField("Table Name", table.Name, 40, nil, func(value string) {
+		newName = value
+	})
+
+	form.AddTextArea("Description", table.Description, 40, 5, 0, func(value string) {
+		newDescription = value
+	})
+
+	form.AddInputField("GUID", table.GUID, 40, nil, func(value string) {
+		newGUID = value
+	})
+
+	form.AddButton("Save", func() {
+		// Apply changes using dataops
+		se.UpdateTable(schemaIndex, tableIndex, newName, newDescription)
+		se.db.Schemas[schemaIndex].Tables[tableIndex].GUID = newGUID
+
+		table := se.db.Schemas[schemaIndex].Tables[tableIndex]
+		se.pages.RemovePage("edit-table")
+		se.pages.RemovePage("table-editor")
+		se.showTableEditor(schemaIndex, tableIndex, table)
+	})
+
+	form.AddButton("Back", func() {
+		// Discard changes - don't apply them
+		table := se.db.Schemas[schemaIndex].Tables[tableIndex]
+		se.pages.RemovePage("edit-table")
+		se.pages.RemovePage("table-editor")
+		se.showTableEditor(schemaIndex, tableIndex, table)
+	})
+
+	form.SetBorder(true).SetTitle(" Edit Table ").SetTitleAlign(tview.AlignLeft)
+	form.SetInputCapture(func(event *tcell.EventKey) *tcell.EventKey {
+		if event.Key() == tcell.KeyEscape {
+			se.showExitConfirmation("edit-table", "table-editor")
+			return nil
+		}
+		return event
+	})
+
+	se.pages.AddPage("edit-table", form, true, true)
+}

pkg/ui/ui_rules.md

@@ -0,0 +1,299 @@
+# UI Rules and Guidelines
+
+## Layout Requirements
+
+All layouts / forms must be in seperate files regarding their domain or entity. 
+
+### Screen Layout Structure
+
+All screens must follow this consistent layout:
+
+1. **Title at the Top** (1 row, fixed height)
+   - Centered bold text: `[::b]Title Text`
+   - Use `tview.NewTextView()` with `SetTextAlign(tview.AlignCenter)`
+   - Enable dynamic colors: `SetDynamicColors(true)`
+
+2. **Content in the Middle** (flexible height)
+   - Tables, lists, forms, or info displays
+   - Uses flex weight of 1 for dynamic sizing
+
+3. **Action Buttons at the Bottom** (1 row, fixed height)
+   - Must be in a horizontal flex container
+   - Action buttons before Back button
+   - Back button is always last
+
+### Form Layout Structure
+
+All forms must follow this button order:
+
+1. **Save Button** (always first)
+   - Label: "Save"
+   - Primary action that commits changes
+
+2. **Delete Button** (optional, only for edit forms)
+   - Label: "Delete"
+   - Only shown when editing existing items (not for new items)
+   - Must show confirmation dialog before deletion
+
+3. **Back Button** (always last)
+   - Label: "Back"
+   - Returns to previous screen without saving
+
+**Button Order Examples:**
+- **New Item Forms:** Save, Back
+- **Edit Item Forms:** Save, Delete, Back
+
+## Tab Navigation
+
+All screens must implement circular tab navigation:
+
+1. **Tab Key** - Moves focus to the next focusable element
+2. **Shift+Tab (BackTab)** - Moves focus to the previous focusable element
+3. **At the End** - Tab cycles back to the first element
+4. **At the Start** - Shift+Tab cycles back to the last element
+
+**Navigation Flow Pattern:**
+- Each widget must handle both Tab and BackTab
+- First widget: BackTab → Last widget, Tab → Second widget
+- Middle widgets: BackTab → Previous widget, Tab → Next widget
+- Last widget: BackTab → Previous widget, Tab → First widget
+
+## Keyboard Shortcuts
+
+### Standard Keys
+
+- **ESC** - Cancel current operation or go back to previous screen
+- **Tab** - Move focus forward (circular)
+- **Shift+Tab** - Move focus backward (circular)
+- **Enter** - Activate/select current item in tables and lists
+
+### Letter Key Shortcuts
+
+- **'n'** - New (create new item)
+- **'b'** - Back (return to previous screen)
+- **'e'** - Edit (edit current item)
+- **'d'** - Delete (delete current item)
+- **'c'** - Edit Column (in table editor)
+- **'s'** - Manage Schemas (in main menu)
+- **'t'** - Manage Tables (in main menu)
+- **'q'** - Quit/Exit (in main menu)
+
+## Consistency Requirements
+
+1. **Layout Structure** - All screens: Title (top) → Content (middle) → Buttons (bottom)
+2. **Title Format** - Bold (`[::b]`), centered, dynamic colors enabled
+3. **Tables** - Fixed headers (row 0), borders enabled, selectable rows
+4. **Buttons** - Include keyboard shortcuts in labels (e.g., "Back [b]")
+5. **Forms** - Button order: Save, Delete (if edit), Back
+6. **Destructive Actions** - Always show confirmation dialogs
+7. **ESC Key** - All screens support ESC to go back
+8. **Action Buttons** - Positioned before Back button, in logical order
+9. **Data Refresh** - Always refresh the previous screen when returning from a form or dialog
+
+## Widget Naming Conventions
+
+- **Tables:** `schemaTable`, `tableTable`, `colTable`
+- **Buttons:** Prefix with `btn` (e.g., `btnBack`, `btnDelete`, `btnNewSchema`)
+- **Flex containers:** `btnFlex` for button containers, `flex` for main layout
+- **Forms:** `form`
+- **Lists:** `list`, `tableList`
+- **Text views:** `title`, `info`
+- Use camelCase for all variable names
+
+## Page Naming Conventions
+
+Use descriptive kebab-case names:
+
+- **Main screens:** `main`, `schemas`, `tables`, `schema-editor`, `table-editor`, `column-editor`
+- **Load/Save screens:** `load-database`, `save-database`
+- **Creation dialogs:** `new-schema`, `new-table`, `new-column`, `new-table-from-list`
+- **Edit dialogs:** `edit-schema`, `edit-table`
+- **Confirmations:** `confirm-delete-schema`, `confirm-delete-table`, `confirm-delete-column`
+- **Exit confirmations:** `exit-confirm`, `exit-editor-confirm`
+- **Status dialogs:** `error-dialog`, `success-dialog`
+
+## Dialog and Confirmation Rules
+
+### Confirmation Dialogs
+
+1. **Delete Confirmations** - Required for all destructive actions
+   - Show item name in confirmation text
+   - Buttons: "Cancel", "Delete"
+   - ESC key dismisses dialog
+
+2. **Exit Confirmations** - Required when exiting forms with potential unsaved changes
+   - Text: "Exit without saving changes?"
+   - Buttons: "Cancel", "No, exit without saving"
+   - ESC key confirms exit
+
+3. **Save Confirmations** - Optional, based on context
+   - Use for critical data changes
+   - Clear description of what will be saved
+
+### Dialog Behavior
+
+- All dialogs must capture ESC key for dismissal
+- Modal dialogs overlay current screen
+- Confirmation dialogs use `tview.NewModal()`
+- Remove dialog page after action completes
+
+## Data Refresh Rules
+
+When returning from any form or dialog, the previous screen must be refreshed to show updated data. If Tables exists in the screen, their data must be updated:
+
+1. **After Save** - Remove and recreate the previous screen to display updated data
+2. **After Delete** - Remove and recreate the previous screen to display remaining data
+3. **After Cancel/Back** - Remove and recreate the previous screen (data may have changed)
+4. **Implementation Pattern** - Remove the current page, remove the previous page, then recreate the previous page with fresh data
+
+**Why This Matters:**
+- Ensures users see their changes immediately
+- Prevents stale data from being displayed
+- Maintains data consistency across the UI
+- Avoids confusion from seeing outdated information
+
+**Example Flow:**
+```
+User on Schema List → Opens Edit Schema Form → Saves Changes →
+Returns to Schema List (refreshed with updated schema data)
+```
+
+## Big Loading/Saving Operations
+
+When loading big changes, files or data, always give a load completed or load error dialog.
+Do the same with saving.
+This informs the user what happens.
+When data is dirty, always ask the user to save when trying to exit.
+
+### Load/Save Screens
+
+- **Load Screen** (`load-database`) - Shown when no source is specified via command line
+  - Format dropdown (dbml, dctx, drawdb, graphql, json, yaml, gorm, bun, drizzle, prisma, typeorm, pgsql)
+  - File path input (for file-based formats)
+  - Connection string input (for database formats like pgsql)
+  - Load button [l] - Loads the database
+  - Create New button [n] - Creates a new empty database
+  - Exit button [q] - Exits the application
+  - ESC key exits the application
+
+- **Save Screen** (`save-database`) - Accessible from main menu with 'w' key
+  - Format dropdown (same as load screen)
+  - File path input
+  - Help text explaining format requirements
+  - Save button [s] - Saves the database
+  - Back button [b] - Returns to main menu
+  - ESC key returns to main menu
+  - Pre-populated with existing save configuration if available
+
+### Status Dialogs
+
+- **Error Dialog** (`error-dialog`) - Shows error messages with OK button and ESC to dismiss
+- **Success Dialog** (`success-dialog`) - Shows success messages with OK button, ESC to dismiss, and optional callback on close
+
+## Screen Organization
+
+Organize UI code into these files:
+
+### UI Files (Screens and Dialogs)
+
+- **editor.go** - Core `SchemaEditor` struct, constructor, `Run()` method, helper functions
+- **main_menu.go** - Main menu screen
+- **load_save_screens.go** - Database load and save screens
+- **database_screens.go** - Database edit form
+- **schema_screens.go** - Schema list, schema editor, new/edit schema dialogs
+- **table_screens.go** - Tables list, table editor, new/edit table dialogs
+- **column_screens.go** - Column editor, new column dialog
+- **domain_screens.go** - Domain list, domain editor, new/edit domain dialogs
+- **dialogs.go** - Confirmation dialogs (exit, delete)
+
+### Data Operations Files (Business Logic)
+
+- **schema_dataops.go** - Schema CRUD operations (Create, Read, Update, Delete)
+- **table_dataops.go** - Table CRUD operations
+- **column_dataops.go** - Column CRUD operations
+
+## Code Separation Rules
+
+### UI vs Business Logic
+
+1. **UI Files** - Handle only presentation and user interaction
+   - Display data in tables, lists, and forms
+   - Capture user input
+   - Navigate between screens
+   - Show/hide dialogs
+   - Call dataops methods for actual data changes
+
+2. **Dataops Files** - Handle only business logic and data manipulation
+   - Create, read, update, delete operations
+   - Data validation
+   - Data structure manipulation
+   - Return created/updated objects or success/failure status
+   - No UI code or tview references
+
+### Implementation Pattern
+
+#### Creating New Items
+
+**Bad (Direct Data Manipulation in UI):**
+```go
+form.AddButton("Save", func() {
+    schema := &models.Schema{Name: name, Description: desc, ...}
+    se.db.Schemas = append(se.db.Schemas, schema)
+})
+```
+
+**Good (Using Dataops Methods):**
+```go
+form.AddButton("Save", func() {
+    se.CreateSchema(name, description)
+})
+```
+
+#### Editing Existing Items
+
+**Bad (Modifying Data in onChange Callbacks):**
+```go
+form.AddInputField("Name", column.Name, 40, nil, func(value string) {
+    column.Name = value  // Changes immediately as user types!
+})
+form.AddButton("Save", func() {
+    // Data already changed, just refresh screen
+})
+```
+
+**Good (Local Variables + Dataops on Save):**
+```go
+// Store original values
+originalName := column.Name
+newName := column.Name
+
+form.AddInputField("Name", column.Name, 40, nil, func(value string) {
+    newName = value  // Store in local variable
+})
+
+form.AddButton("Save", func() {
+    // Apply changes only when Save is clicked
+    se.UpdateColumn(schemaIndex, tableIndex, originalName, newName, ...)
+    // Then refresh screen
+})
+
+form.AddButton("Back", func() {
+    // Discard changes - don't apply local variables
+    // Just refresh screen
+})
+```
+
+### Why This Matters
+
+**Edit Forms Must Use Local Variables:**
+1. **Deferred Changes** - Changes only apply when Save is clicked
+2. **Cancellable** - Back button discards changes without saving
+3. **Handles Renames** - Original name preserved to update map keys correctly
+4. **User Expectations** - Save means "commit changes", Back means "cancel"
+
+This separation ensures:
+- Cleaner, more maintainable code
+- Reusable business logic
+- Easier testing
+- Clear separation of concerns
+- Proper change management (save vs cancel)

pkg/writers/bun/type_mapper.go

@@ -192,8 +192,11 @@ func (tm *TypeMapper) BuildBunTag(column *models.Column, table *models.Table) st
 	}
 
 	// Nullable (Bun uses nullzero for nullable fields)
+	// and notnull tag for explicitly non-nullable fields
 	if !column.NotNull && !column.IsPrimaryKey {
 		parts = append(parts, "nullzero")
+	} else if column.NotNull && !column.IsPrimaryKey {
+		parts = append(parts, "notnull")
 	}
 
 	// Check for indexes (unique indexes should be added to tag)

pkg/writers/bun/writer.go

@@ -207,7 +207,10 @@ func (w *Writer) writeMultiFile(db *models.Database) error {
 			}
 
 			// Generate filename: sql_{schema}_{table}.go
-			filename := fmt.Sprintf("sql_%s_%s.go", schema.Name, table.Name)
+			// Sanitize schema and table names to remove quotes, comments, and invalid characters
+			safeSchemaName := writers.SanitizeFilename(schema.Name)
+			safeTableName := writers.SanitizeFilename(table.Name)
+			filename := fmt.Sprintf("sql_%s_%s.go", safeSchemaName, safeTableName)
 			filepath := filepath.Join(w.options.OutputPath, filename)
 
 			// Write file
@@ -386,6 +389,7 @@ func (w *Writer) createDatabaseRef(db *models.Database) *models.Database {
 		DatabaseVersion: db.DatabaseVersion,
 		SourceFormat:    db.SourceFormat,
 		Schemas:         nil, // Don't include schemas to avoid circular reference
+		GUID:            db.GUID,
 	}
 }
 
@@ -402,5 +406,6 @@ func (w *Writer) createSchemaRef(schema *models.Schema, db *models.Database) *mo
 		Sequence:    schema.Sequence,
 		RefDatabase: w.createDatabaseRef(db), // Include database ref
 		Tables:      nil,                     // Don't include tables to avoid circular reference
+		GUID:        schema.GUID,
 	}
 }

pkg/writers/dbml/writer.go

@@ -126,7 +126,15 @@ func (w *Writer) tableToDBML(t *models.Table) string {
 			attrs = append(attrs, "increment")
 		}
 		if column.Default != nil {
-			attrs = append(attrs, fmt.Sprintf("default: `%v`", column.Default))
+			// Check if default value contains backticks (DBML expressions like `now()`)
+			defaultStr := fmt.Sprintf("%v", column.Default)
+			if strings.HasPrefix(defaultStr, "`") && strings.HasSuffix(defaultStr, "`") {
+				// Already an expression with backticks, use as-is
+				attrs = append(attrs, fmt.Sprintf("default: %s", defaultStr))
+			} else {
+				// Regular value, wrap in single quotes
+				attrs = append(attrs, fmt.Sprintf("default: '%v'", column.Default))
+			}
 		}
 
 		if len(attrs) > 0 {

pkg/writers/dctx/writer.go

@@ -133,7 +133,11 @@ func (w *Writer) mapTableFields(table *models.Table) models.DCTXTable {
 		prefix = table.Name[:3]
 	}
 
-	tableGuid := w.newGUID()
+	// Use GUID from model if available, otherwise generate a new one
+	tableGuid := table.GUID
+	if tableGuid == "" {
+		tableGuid = w.newGUID()
+	}
 	w.tableGuidMap[table.Name] = tableGuid
 
 	dctxTable := models.DCTXTable{
@@ -171,7 +175,11 @@ func (w *Writer) mapTableKeys(table *models.Table) []models.DCTXKey {
 }
 
 func (w *Writer) mapField(column *models.Column) models.DCTXField {
-	guid := w.newGUID()
+	// Use GUID from model if available, otherwise generate a new one
+	guid := column.GUID
+	if guid == "" {
+		guid = w.newGUID()
+	}
 	fieldKey := fmt.Sprintf("%s.%s", column.Table, column.Name)
 	w.fieldGuidMap[fieldKey] = guid
 
@@ -209,7 +217,11 @@ func (w *Writer) mapDataType(dataType string) string {
 }
 
 func (w *Writer) mapKey(index *models.Index, table *models.Table) models.DCTXKey {
-	guid := w.newGUID()
+	// Use GUID from model if available, otherwise generate a new one
+	guid := index.GUID
+	if guid == "" {
+		guid = w.newGUID()
+	}
 	keyKey := fmt.Sprintf("%s.%s", table.Name, index.Name)
 	w.keyGuidMap[keyKey] = guid
 
@@ -344,7 +356,7 @@ func (w *Writer) mapRelation(rel *models.Relationship, schema *models.Schema) mo
 	}
 
 	return models.DCTXRelation{
-		Guid:            w.newGUID(),
+		Guid:            rel.GUID,                      // Use GUID from relationship model
 		PrimaryTable:    w.tableGuidMap[rel.ToTable],   // GUID of the 'to' table (e.g., users)
 		ForeignTable:    w.tableGuidMap[rel.FromTable], // GUID of the 'from' table (e.g., posts)
 		PrimaryKey:      primaryKeyGUID,

pkg/writers/drawdb/writer.go

@@ -127,6 +127,51 @@ func (w *Writer) databaseToDrawDB(d *models.Database) *DrawDBSchema {
 		}
 	}
 
+	// Create subject areas for domains
+	for domainIdx, domainModel := range d.Domains {
+		// Calculate bounds for all tables in this domain
+		minX, minY := 999999, 999999
+		maxX, maxY := 0, 0
+
+		domainTableCount := 0
+		for _, domainTable := range domainModel.Tables {
+			// Find the table in the schema to get its position
+			for _, t := range schema.Tables {
+				if t.Name == domainTable.TableName {
+					if t.X < minX {
+						minX = t.X
+					}
+					if t.Y < minY {
+						minY = t.Y
+					}
+					if t.X+colWidth > maxX {
+						maxX = t.X + colWidth
+					}
+					if t.Y+rowHeight > maxY {
+						maxY = t.Y + rowHeight
+					}
+					domainTableCount++
+					break
+				}
+			}
+		}
+
+		// Only create area if domain has tables in this schema
+		if domainTableCount > 0 {
+			area := &DrawDBArea{
+				ID:     areaID,
+				Name:   domainModel.Name,
+				Color:  getColorForIndex(len(d.Schemas) + domainIdx), // Use different colors than schemas
+				X:      minX - 20,
+				Y:      minY - 20,
+				Width:  maxX - minX + 40,
+				Height: maxY - minY + 40,
+			}
+			schema.SubjectAreas = append(schema.SubjectAreas, area)
+			areaID++
+		}
+	}
+
 	// Add relationships
 	for _, schemaModel := range d.Schemas {
 		for _, table := range schemaModel.Tables {

pkg/writers/drizzle/writer.go

@@ -196,7 +196,9 @@ func (w *Writer) writeTableFile(table *models.Table, schema *models.Schema, db *
 	}
 
 	// Generate filename: {tableName}.ts
-	filename := filepath.Join(w.options.OutputPath, table.Name+".ts")
+	// Sanitize table name to remove quotes, comments, and invalid characters
+	safeTableName := writers.SanitizeFilename(table.Name)
+	filename := filepath.Join(w.options.OutputPath, safeTableName+".ts")
 	return os.WriteFile(filename, []byte(code), 0644)
 }
 

pkg/writers/gorm/writer.go

@@ -201,7 +201,10 @@ func (w *Writer) writeMultiFile(db *models.Database) error {
 			}
 
 			// Generate filename: sql_{schema}_{table}.go
-			filename := fmt.Sprintf("sql_%s_%s.go", schema.Name, table.Name)
+			// Sanitize schema and table names to remove quotes, comments, and invalid characters
+			safeSchemaName := writers.SanitizeFilename(schema.Name)
+			safeTableName := writers.SanitizeFilename(table.Name)
+			filename := fmt.Sprintf("sql_%s_%s.go", safeSchemaName, safeTableName)
 			filepath := filepath.Join(w.options.OutputPath, filename)
 
 			// Write file
@@ -380,6 +383,7 @@ func (w *Writer) createDatabaseRef(db *models.Database) *models.Database {
 		DatabaseVersion: db.DatabaseVersion,
 		SourceFormat:    db.SourceFormat,
 		Schemas:         nil, // Don't include schemas to avoid circular reference
+		GUID:            db.GUID,
 	}
 }
 
@@ -396,5 +400,6 @@ func (w *Writer) createSchemaRef(schema *models.Schema, db *models.Database) *mo
 		Sequence:    schema.Sequence,
 		RefDatabase: w.createDatabaseRef(db), // Include database ref
 		Tables:      nil,                     // Don't include tables to avoid circular reference
+		GUID:        schema.GUID,
 	}
 }

pkg/writers/template/template_data.go

@@ -7,6 +7,7 @@ type TemplateData struct {
 	// One of these will be populated based on execution mode
 	Database *models.Database
 	Schema   *models.Schema
+	Domain   *models.Domain
 	Script   *models.Script
 	Table    *models.Table
 
@@ -57,6 +58,15 @@ func NewSchemaData(schema *models.Schema, metadata map[string]interface{}) *Temp
 	}
 }
 
+// NewDomainData creates template data for domain mode
+func NewDomainData(domain *models.Domain, db *models.Database, metadata map[string]interface{}) *TemplateData {
+	return &TemplateData{
+		Domain:         domain,
+		ParentDatabase: db,
+		Metadata:       metadata,
+	}
+}
+
 // NewScriptData creates template data for script mode
 func NewScriptData(script *models.Script, schema *models.Schema, db *models.Database, metadata map[string]interface{}) *TemplateData {
 	return &TemplateData{
@@ -85,6 +95,9 @@ func (td *TemplateData) Name() string {
 	if td.Schema != nil {
 		return td.Schema.Name
 	}
+	if td.Domain != nil {
+		return td.Domain.Name
+	}
 	if td.Script != nil {
 		return td.Script.Name
 	}

pkg/writers/template/writer.go

@@ -20,6 +20,8 @@ const (
 	DatabaseMode EntrypointMode = "database"
 	// SchemaMode executes the template once per schema (multi-file output)
 	SchemaMode EntrypointMode = "schema"
+	// DomainMode executes the template once per domain (multi-file output)
+	DomainMode EntrypointMode = "domain"
 	// ScriptMode executes the template once per script (multi-file output)
 	ScriptMode EntrypointMode = "script"
 	// TableMode executes the template once per table (multi-file output)
@@ -80,6 +82,8 @@ func (w *Writer) WriteDatabase(db *models.Database) error {
 		return w.executeDatabaseMode(db)
 	case SchemaMode:
 		return w.executeSchemaMode(db)
+	case DomainMode:
+		return w.executeDomainMode(db)
 	case ScriptMode:
 		return w.executeScriptMode(db)
 	case TableMode:
@@ -143,6 +147,28 @@ func (w *Writer) executeSchemaMode(db *models.Database) error {
 	return nil
 }
 
+// executeDomainMode executes the template once per domain
+func (w *Writer) executeDomainMode(db *models.Database) error {
+	for _, domain := range db.Domains {
+		data := NewDomainData(domain, db, w.options.Metadata)
+		output, err := w.executeTemplate(data)
+		if err != nil {
+			return fmt.Errorf("failed to execute template for domain %s: %w", domain.Name, err)
+		}
+
+		filename, err := w.generateFilename(data)
+		if err != nil {
+			return fmt.Errorf("failed to generate filename for domain %s: %w", domain.Name, err)
+		}
+
+		if err := w.writeOutput(output, filename); err != nil {
+			return fmt.Errorf("failed to write output for domain %s: %w", domain.Name, err)
+		}
+	}
+
+	return nil
+}
+
 // executeScriptMode executes the template once per script
 func (w *Writer) executeScriptMode(db *models.Database) error {
 	for _, schema := range db.Schemas {

pkg/writers/writer.go

@@ -1,6 +1,9 @@
 package writers
 
 import (
+	"regexp"
+	"strings"
+
 	"git.warky.dev/wdevs/relspecgo/pkg/models"
 )
 
@@ -28,3 +31,33 @@ type WriterOptions struct {
 	// Additional options can be added here as needed
 	Metadata map[string]interface{}
 }
+
+// SanitizeFilename removes quotes, comments, and invalid characters from identifiers
+// to make them safe for use in filenames. This handles:
+// - Double and single quotes: "table_name" or 'table_name' -> table_name
+// - DBML comments: table [note: 'description'] -> table
+// - Invalid filename characters: replaced with underscores
+func SanitizeFilename(name string) string {
+	// Remove DBML/DCTX style comments in brackets (e.g., [note: 'description'])
+	commentRegex := regexp.MustCompile(`\s*\[.*?\]\s*`)
+	name = commentRegex.ReplaceAllString(name, "")
+
+	// Remove quotes (both single and double)
+	name = strings.ReplaceAll(name, `"`, "")
+	name = strings.ReplaceAll(name, `'`, "")
+
+	// Remove backticks (MySQL style identifiers)
+	name = strings.ReplaceAll(name, "`", "")
+
+	// Replace invalid filename characters with underscores
+	// Invalid chars: / \ : * ? " < > | and control characters
+	invalidChars := regexp.MustCompile(`[/\\:*?"<>|\x00-\x1f\x7f]`)
+	name = invalidChars.ReplaceAllString(name, "_")
+
+	// Trim whitespace and consecutive underscores
+	name = strings.TrimSpace(name)
+	name = regexp.MustCompile(`_+`).ReplaceAllString(name, "_")
+	name = strings.Trim(name, "_")
+
+	return name
+}

tests/assets/dbml/multifile/1_users.dbml

@@ -0,0 +1,5 @@
+// First file - users table basic structure
+Table public.users {
+  id bigint [pk, increment]
+  email varchar(255) [unique, not null]
+}

tests/assets/dbml/multifile/2_posts.dbml

@@ -0,0 +1,8 @@
+// Second file - posts table
+Table public.posts {
+  id bigint [pk, increment]
+  user_id bigint [not null]
+  title varchar(200) [not null]
+  content text
+  created_at timestamp [not null]
+}

tests/assets/dbml/multifile/3_add_columns.dbml

@@ -0,0 +1,5 @@
+// Third file - adds more columns to users table (tests merging)
+Table public.users {
+  name varchar(100)
+  created_at timestamp [not null]
+}

tests/assets/dbml/multifile/9_refs.dbml

@@ -0,0 +1,10 @@
+// File with commented-out refs - should load last
+// Contains relationships that depend on earlier tables
+
+// Ref: public.posts.user_id > public.users.id [ondelete: CASCADE]
+
+Table public.comments {
+  id bigint [pk, increment]
+  post_id bigint [not null]
+  content text [not null]
+}

vendor/github.com/gdamore/encoding/.appveyor.yml

@@ -0,0 +1,13 @@
+version: 1.0.{build}
+clone_folder: c:\gopath\src\github.com\gdamore\encoding
+environment:
+  GOPATH: c:\gopath
+build_script:
+- go version
+- go env
+- SET PATH=%LOCALAPPDATA%\atom\bin;%GOPATH%\bin;%PATH%
+- go get -t ./...
+- go build
+- go install ./...
+test_script:
+- go test ./...

vendor/github.com/gdamore/encoding/CODE_OF_CONDUCT.md

@@ -0,0 +1,73 @@
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at garrett@damore.org. All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+[homepage]: https://www.contributor-covenant.org

vendor/github.com/gdamore/encoding/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
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+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
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+
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+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
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+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
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+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
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+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
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+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
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+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+   3. Grant of Patent License. Subject to the terms and conditions of
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+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+
+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
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+
+      (c) You must retain, in the Source form of any Derivative Works
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+      (d) If the Work includes a "NOTICE" text file as part of its
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+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
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+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
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+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+      file or class name and description of purpose be included on the
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+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/github.com/gdamore/encoding/README.md

@@ -0,0 +1,20 @@
+## encoding
+
+
+[![Linux](https://img.shields.io/github/actions/workflow/status/gdamore/encoding/linux.yml?branch=main&logoColor=grey&logo=linux&label=)](https://github.com/gdamore/encoding/actions/workflows/linux.yml)
+[![Windows](https://img.shields.io/github/actions/workflow/status/gdamore/encoding/windows.yml?branch=main&logoColor=grey&logo=windows&label=)](https://github.com/gdamore/encoding/actions/workflows/windows.yml)
+[![Apache License](https://img.shields.io/github/license/gdamore/encoding.svg?logoColor=silver&logo=opensourceinitiative&color=blue&label=)](https://github.com/gdamore/encoding/blob/master/LICENSE)
+[![Coverage](https://img.shields.io/codecov/c/github/gdamore/encoding?logoColor=grey&logo=codecov&label=)](https://codecov.io/gh/gdamore/encoding)
+[![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg)](https://godoc.org/github.com/gdamore/encoding)
+
+Package encoding provides a number of encodings that are missing from the
+standard Go [encoding]("https://godoc.org/golang.org/x/text/encoding") package.
+
+We hope that we can contribute these to the standard Go library someday.  It
+turns out that some of these are useful for dealing with I/O streams coming
+from non-UTF friendly sources.
+
+The UTF8 Encoder is also useful for situations where valid UTF-8 might be
+carried in streams that contain non-valid UTF; in particular I use it for
+helping me cope with terminals that embed escape sequences in otherwise
+valid UTF-8.

vendor/github.com/gdamore/encoding/SECURITY.md

@@ -0,0 +1,12 @@
+# Security Policy
+
+We take security very seriously in mangos, since you may be using it in
+Internet-facing applications.
+
+## Reporting a Vulnerability
+
+To report a vulnerability, please contact us on our discord.
+You may also send an email to garrett@damore.org, or info@staysail.tech.
+
+We will keep the reporter updated on any status updates on a regular basis,
+and will respond within two business days for any reported security issue.

vendor/github.com/gdamore/encoding/ascii.go

@@ -0,0 +1,36 @@
+// Copyright 2015 Garrett D'Amore
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"golang.org/x/text/encoding"
+)
+
+// ASCII represents the 7-bit US-ASCII scheme.  It decodes directly to
+// UTF-8 without change, as all ASCII values are legal UTF-8.
+// Unicode values less than 128 (i.e. 7 bits) map 1:1 with ASCII.
+// It encodes runes outside of that to 0x1A, the ASCII substitution character.
+var ASCII encoding.Encoding
+
+func init() {
+	amap := make(map[byte]rune)
+	for i := 128; i <= 255; i++ {
+		amap[byte(i)] = RuneError
+	}
+
+	cm := &Charmap{Map: amap}
+	cm.Init()
+	ASCII = cm
+}

vendor/github.com/gdamore/encoding/charmap.go

@@ -0,0 +1,195 @@
+// Copyright 2024 Garrett D'Amore
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"sync"
+	"unicode/utf8"
+
+	"golang.org/x/text/encoding"
+	"golang.org/x/text/transform"
+)
+
+const (
+	// RuneError is an alias for the UTF-8 replacement rune, '\uFFFD'.
+	RuneError = '\uFFFD'
+
+	// RuneSelf is the rune below which UTF-8 and the Unicode values are
+	// identical.  Its also the limit for ASCII.
+	RuneSelf = 0x80
+
+	// ASCIISub is the ASCII substitution character.
+	ASCIISub = '\x1a'
+)
+
+// Charmap is a structure for setting up encodings for 8-bit character sets,
+// for transforming between UTF8 and that other character set.  It has some
+// ideas borrowed from golang.org/x/text/encoding/charmap, but it uses a
+// different implementation.  This implementation uses maps, and supports
+// user-defined maps.
+//
+// We do assume that a character map has a reasonable substitution character,
+// and that valid encodings are stable (exactly a 1:1 map) and stateless
+// (that is there is no shift character or anything like that.)  Hence this
+// approach will not work for many East Asian character sets.
+//
+// Measurement shows little or no measurable difference in the performance of
+// the two approaches.  The difference was down to a couple of nsec/op, and
+// no consistent pattern as to which ran faster.  With the conversion to
+// UTF-8 the code takes about 25 nsec/op.  The conversion in the reverse
+// direction takes about 100 nsec/op.  (The larger cost for conversion
+// from UTF-8 is most likely due to the need to convert the UTF-8 byte stream
+// to a rune before conversion.
+type Charmap struct {
+	transform.NopResetter
+	bytes map[rune]byte
+	runes [256][]byte
+	once  sync.Once
+
+	// The map between bytes and runes.  To indicate that a specific
+	// byte value is invalid for a charcter set, use the rune
+	// utf8.RuneError.  Values that are absent from this map will
+	// be assumed to have the identity mapping -- that is the default
+	// is to assume ISO8859-1, where all 8-bit characters have the same
+	// numeric value as their Unicode runes.  (Not to be confused with
+	// the UTF-8 values, which *will* be different for non-ASCII runes.)
+	//
+	// If no values less than RuneSelf are changed (or have non-identity
+	// mappings), then the character set is assumed to be an ASCII
+	// superset, and certain assumptions and optimizations become
+	// available for ASCII bytes.
+	Map map[byte]rune
+
+	// The ReplacementChar is the byte value to use for substitution.
+	// It should normally be ASCIISub for ASCII encodings.  This may be
+	// unset (left to zero) for mappings that are strictly ASCII supersets.
+	// In that case ASCIISub will be assumed instead.
+	ReplacementChar byte
+}
+
+type cmapDecoder struct {
+	transform.NopResetter
+	runes [256][]byte
+}
+
+type cmapEncoder struct {
+	transform.NopResetter
+	bytes   map[rune]byte
+	replace byte
+}
+
+// Init initializes internal values of a character map.  This should
+// be done early, to minimize the cost of allocation of transforms
+// later.  It is not strictly necessary however, as the allocation
+// functions will arrange to call it if it has not already been done.
+func (c *Charmap) Init() {
+	c.once.Do(c.initialize)
+}
+
+func (c *Charmap) initialize() {
+	c.bytes = make(map[rune]byte)
+	ascii := true
+
+	for i := 0; i < 256; i++ {
+		r, ok := c.Map[byte(i)]
+		if !ok {
+			r = rune(i)
+		}
+		if r < 128 && r != rune(i) {
+			ascii = false
+		}
+		if r != RuneError {
+			c.bytes[r] = byte(i)
+		}
+		utf := make([]byte, utf8.RuneLen(r))
+		utf8.EncodeRune(utf, r)
+		c.runes[i] = utf
+	}
+	if ascii && c.ReplacementChar == '\x00' {
+		c.ReplacementChar = ASCIISub
+	}
+}
+
+// NewDecoder returns a Decoder the converts from the 8-bit
+// character set to UTF-8.  Unknown mappings, if any, are mapped
+// to '\uFFFD'.
+func (c *Charmap) NewDecoder() *encoding.Decoder {
+	c.Init()
+	return &encoding.Decoder{Transformer: &cmapDecoder{runes: c.runes}}
+}
+
+// NewEncoder returns a Transformer that converts from UTF8 to the
+// 8-bit character set.  Unknown mappings are mapped to 0x1A.
+func (c *Charmap) NewEncoder() *encoding.Encoder {
+	c.Init()
+	return &encoding.Encoder{
+		Transformer: &cmapEncoder{
+			bytes:   c.bytes,
+			replace: c.ReplacementChar,
+		},
+	}
+}
+
+func (d *cmapDecoder) Transform(dst, src []byte, atEOF bool) (int, int, error) {
+	var e error
+	var ndst, nsrc int
+
+	for _, c := range src {
+		b := d.runes[c]
+		l := len(b)
+
+		if ndst+l > len(dst) {
+			e = transform.ErrShortDst
+			break
+		}
+		for i := 0; i < l; i++ {
+			dst[ndst] = b[i]
+			ndst++
+		}
+		nsrc++
+	}
+	return ndst, nsrc, e
+}
+
+func (d *cmapEncoder) Transform(dst, src []byte, atEOF bool) (int, int, error) {
+	var e error
+	var ndst, nsrc int
+	for nsrc < len(src) {
+		if ndst >= len(dst) {
+			e = transform.ErrShortDst
+			break
+		}
+
+		r, sz := utf8.DecodeRune(src[nsrc:])
+		if r == utf8.RuneError && sz == 1 {
+			// If its inconclusive due to insufficient data in
+			// in the source, report it
+			if atEOF && !utf8.FullRune(src[nsrc:]) {
+				e = transform.ErrShortSrc
+				break
+			}
+		}
+
+		if c, ok := d.bytes[r]; ok {
+			dst[ndst] = c
+		} else {
+			dst[ndst] = d.replace
+		}
+		nsrc += sz
+		ndst++
+	}
+
+	return ndst, nsrc, e
+}

vendor/github.com/gdamore/encoding/doc.go

@@ -0,0 +1,17 @@
+// Copyright 2015 Garrett D'Amore
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package encoding provides a few of the encoding structures that are
+// missing from the Go x/text/encoding tree.
+package encoding

vendor/github.com/gdamore/encoding/ebcdic.go

@@ -0,0 +1,273 @@
+// Copyright 2015 Garrett D'Amore
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"golang.org/x/text/encoding"
+)
+
+// EBCDIC represents the 8-bit EBCDIC scheme, found in some mainframe
+// environments.  If you don't know what this is, consider yourself lucky.
+var EBCDIC encoding.Encoding
+
+func init() {
+	cm := &Charmap{
+		ReplacementChar: '\x3f',
+		Map: map[byte]rune{
+			// 0x00-0x03 match
+			0x04: RuneError,
+			0x05: '\t',
+			0x06: RuneError,
+			0x07: '\x7f',
+			0x08: RuneError,
+			0x09: RuneError,
+			0x0a: RuneError,
+			// 0x0b-0x13 match
+			0x14: RuneError,
+			0x15: '\x85', // Not in any ISO code
+			0x16: '\x08',
+			0x17: RuneError,
+			// 0x18-0x19 match
+			0x1a: RuneError,
+			0x1b: RuneError,
+			// 0x1c-0x1f match
+			0x20: RuneError,
+			0x21: RuneError,
+			0x22: RuneError,
+			0x23: RuneError,
+			0x24: RuneError,
+			0x25: '\n',
+			0x26: '\x17',
+			0x27: '\x1b',
+			0x28: RuneError,
+			0x29: RuneError,
+			0x2a: RuneError,
+			0x2b: RuneError,
+			0x2c: RuneError,
+			0x2d: '\x05',
+			0x2e: '\x06',
+			0x2f: '\x07',
+			0x30: RuneError,
+			0x31: RuneError,
+			0x32: '\x16',
+			0x33: RuneError,
+			0x34: RuneError,
+			0x35: RuneError,
+			0x36: RuneError,
+			0x37: '\x04',
+			0x38: RuneError,
+			0x39: RuneError,
+			0x3a: RuneError,
+			0x3b: RuneError,
+			0x3c: '\x14',
+			0x3d: '\x15',
+			0x3e: RuneError,
+			0x3f: '\x1a', // also replacement char
+			0x40: ' ',
+			0x41: '\xa0',
+			0x42: RuneError,
+			0x43: RuneError,
+			0x44: RuneError,
+			0x45: RuneError,
+			0x46: RuneError,
+			0x47: RuneError,
+			0x48: RuneError,
+			0x49: RuneError,
+			0x4a: RuneError,
+			0x4b: '.',
+			0x4c: '<',
+			0x4d: '(',
+			0x4e: '+',
+			0x4f: '|',
+			0x50: '&',
+			0x51: RuneError,
+			0x52: RuneError,
+			0x53: RuneError,
+			0x54: RuneError,
+			0x55: RuneError,
+			0x56: RuneError,
+			0x57: RuneError,
+			0x58: RuneError,
+			0x59: RuneError,
+			0x5a: '!',
+			0x5b: '$',
+			0x5c: '*',
+			0x5d: ')',
+			0x5e: ';',
+			0x5f: '¬',
+			0x60: '-',
+			0x61: '/',
+			0x62: RuneError,
+			0x63: RuneError,
+			0x64: RuneError,
+			0x65: RuneError,
+			0x66: RuneError,
+			0x67: RuneError,
+			0x68: RuneError,
+			0x69: RuneError,
+			0x6a: '¦',
+			0x6b: ',',
+			0x6c: '%',
+			0x6d: '_',
+			0x6e: '>',
+			0x6f: '?',
+			0x70: RuneError,
+			0x71: RuneError,
+			0x72: RuneError,
+			0x73: RuneError,
+			0x74: RuneError,
+			0x75: RuneError,
+			0x76: RuneError,
+			0x77: RuneError,
+			0x78: RuneError,
+			0x79: '`',
+			0x7a: ':',
+			0x7b: '#',
+			0x7c: '@',
+			0x7d: '\'',
+			0x7e: '=',
+			0x7f: '"',
+			0x80: RuneError,
+			0x81: 'a',
+			0x82: 'b',
+			0x83: 'c',
+			0x84: 'd',
+			0x85: 'e',
+			0x86: 'f',
+			0x87: 'g',
+			0x88: 'h',
+			0x89: 'i',
+			0x8a: RuneError,
+			0x8b: RuneError,
+			0x8c: RuneError,
+			0x8d: RuneError,
+			0x8e: RuneError,
+			0x8f: '±',
+			0x90: RuneError,
+			0x91: 'j',
+			0x92: 'k',
+			0x93: 'l',
+			0x94: 'm',
+			0x95: 'n',
+			0x96: 'o',
+			0x97: 'p',
+			0x98: 'q',
+			0x99: 'r',
+			0x9a: RuneError,
+			0x9b: RuneError,
+			0x9c: RuneError,
+			0x9d: RuneError,
+			0x9e: RuneError,
+			0x9f: RuneError,
+			0xa0: RuneError,
+			0xa1: '~',
+			0xa2: 's',
+			0xa3: 't',
+			0xa4: 'u',
+			0xa5: 'v',
+			0xa6: 'w',
+			0xa7: 'x',
+			0xa8: 'y',
+			0xa9: 'z',
+			0xaa: RuneError,
+			0xab: RuneError,
+			0xac: RuneError,
+			0xad: RuneError,
+			0xae: RuneError,
+			0xaf: RuneError,
+			0xb0: '^',
+			0xb1: RuneError,
+			0xb2: RuneError,
+			0xb3: RuneError,
+			0xb4: RuneError,
+			0xb5: RuneError,
+			0xb6: RuneError,
+			0xb7: RuneError,
+			0xb8: RuneError,
+			0xb9: RuneError,
+			0xba: '[',
+			0xbb: ']',
+			0xbc: RuneError,
+			0xbd: RuneError,
+			0xbe: RuneError,
+			0xbf: RuneError,
+			0xc0: '{',
+			0xc1: 'A',
+			0xc2: 'B',
+			0xc3: 'C',
+			0xc4: 'D',
+			0xc5: 'E',
+			0xc6: 'F',
+			0xc7: 'G',
+			0xc8: 'H',
+			0xc9: 'I',
+			0xca: '\xad', // NB: soft hyphen
+			0xcb: RuneError,
+			0xcc: RuneError,
+			0xcd: RuneError,
+			0xce: RuneError,
+			0xcf: RuneError,
+			0xd0: '}',
+			0xd1: 'J',
+			0xd2: 'K',
+			0xd3: 'L',
+			0xd4: 'M',
+			0xd5: 'N',
+			0xd6: 'O',
+			0xd7: 'P',
+			0xd8: 'Q',
+			0xd9: 'R',
+			0xda: RuneError,
+			0xdb: RuneError,
+			0xdc: RuneError,
+			0xdd: RuneError,
+			0xde: RuneError,
+			0xdf: RuneError,
+			0xe0: '\\',
+			0xe1: '\u2007', // Non-breaking space
+			0xe2: 'S',
+			0xe3: 'T',
+			0xe4: 'U',
+			0xe5: 'V',
+			0xe6: 'W',
+			0xe7: 'X',
+			0xe8: 'Y',
+			0xe9: 'Z',
+			0xea: RuneError,
+			0xeb: RuneError,
+			0xec: RuneError,
+			0xed: RuneError,
+			0xee: RuneError,
+			0xef: RuneError,
+			0xf0: '0',
+			0xf1: '1',
+			0xf2: '2',
+			0xf3: '3',
+			0xf4: '4',
+			0xf5: '5',
+			0xf6: '6',
+			0xf7: '7',
+			0xf8: '8',
+			0xf9: '9',
+			0xfa: RuneError,
+			0xfb: RuneError,
+			0xfc: RuneError,
+			0xfd: RuneError,
+			0xfe: RuneError,
+			0xff: RuneError,
+		}}
+	cm.Init()
+	EBCDIC = cm
+}

vendor/github.com/gdamore/encoding/latin1.go

@@ -0,0 +1,33 @@
+// Copyright 2015 Garrett D'Amore
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"golang.org/x/text/encoding"
+)
+
+// ISO8859_1 represents the 8-bit ISO8859-1 scheme.  It decodes directly to
+// UTF-8 without change, as all ISO8859-1 values are legal UTF-8.
+// Unicode values less than 256 (i.e. 8 bits) map 1:1 with 8859-1.
+// It encodes runes outside of that to 0x1A, the ASCII substitution character.
+var ISO8859_1 encoding.Encoding
+
+func init() {
+	cm := &Charmap{}
+	cm.Init()
+
+	// 8859-1 is the 8-bit identity map for Unicode.
+	ISO8859_1 = cm
+}

vendor/github.com/gdamore/encoding/latin5.go

@@ -0,0 +1,35 @@
+// Copyright 2015 Garrett D'Amore
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"golang.org/x/text/encoding"
+)
+
+// ISO8859_9 represents the 8-bit ISO8859-9 scheme.
+var ISO8859_9 encoding.Encoding
+
+func init() {
+	cm := &Charmap{Map: map[byte]rune{
+		0xD0: 'Ğ',
+		0xDD: 'İ',
+		0xDE: 'Ş',
+		0xF0: 'ğ',
+		0xFD: 'ı',
+		0xFE: 'ş',
+	}}
+	cm.Init()
+	ISO8859_9 = cm
+}

vendor/github.com/gdamore/encoding/utf8.go

@@ -0,0 +1,35 @@
+// Copyright 2015 Garrett D'Amore
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package encoding
+
+import (
+	"golang.org/x/text/encoding"
+)
+
+type validUtf8 struct{}
+
+// UTF8 is an encoding for UTF-8.  All it does is verify that the UTF-8
+// in is valid.  The main reason for its existence is that it will detect
+// and report ErrSrcShort or ErrDstShort, whereas the Nop encoding just
+// passes every byte, blithely.
+var UTF8 encoding.Encoding = validUtf8{}
+
+func (validUtf8) NewDecoder() *encoding.Decoder {
+	return &encoding.Decoder{Transformer: encoding.UTF8Validator}
+}
+
+func (validUtf8) NewEncoder() *encoding.Encoder {
+	return &encoding.Encoder{Transformer: encoding.UTF8Validator}
+}

vendor/github.com/gdamore/tcell/v2/.appveyor.yml

@@ -0,0 +1,13 @@
+version: 1.0.{build}
+clone_folder: c:\gopath\src\github.com\gdamore\tcell
+environment:
+  GOPATH: c:\gopath
+build_script:
+- go version
+- go env
+- SET PATH=%LOCALAPPDATA%\atom\bin;%GOPATH%\bin;%PATH%
+- go get -t ./...
+- go build
+- go install ./...
+test_script:
+- go test ./...

vendor/github.com/gdamore/tcell/v2/.gitignore

@@ -0,0 +1 @@
+coverage.txt

vendor/github.com/gdamore/tcell/v2/.travis.yml

@@ -0,0 +1,18 @@
+language: go
+
+go:
+  - 1.15.x
+  - master
+
+arch:
+   - amd64
+   - ppc64le
+
+before_install:
+  - go get -t -v ./...
+
+script:
+  - go test -race -coverprofile=coverage.txt -covermode=atomic
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

vendor/github.com/gdamore/tcell/v2/AUTHORS

@@ -0,0 +1,4 @@
+Garrett D'Amore <garrett@damore.org>
+Zachary Yedidia <zyedidia@gmail.com>
+Junegunn Choi <junegunn.c@gmail.com>
+Staysail Systems, Inc. <info@staysail.tech>

vendor/github.com/gdamore/tcell/v2/CHANGESv2.md

@@ -0,0 +1,82 @@
+## Breaking Changes in _Tcell_ v2
+
+A number of changes were made to _Tcell_ for version two, and some of these are breaking.
+
+### Import Path
+
+The import path for tcell has changed to `github.com/gdamore/tcell/v2` to reflect a new major version.
+
+### Style Is Not Numeric
+
+The type `Style` has changed to a structure, to allow us to add additional data such as flags for color setting,
+more attribute bits, and so forth.
+Applications that relied on this being a number will need to be updated to use the accessor methods.
+
+### Mouse Event Changes
+
+The middle mouse button was reported as button 2 on Linux, but as button 3 on Windows,
+and the right mouse button was reported the reverse way.
+_Tcell_ now always reports the right mouse button as button 2, and the middle button as button 3.
+To help make this clearer, new symbols `ButtonPrimary`, `ButtonSecondary`, and
+`ButtonMiddle` are provided.
+(Note that which button is right vs. left may be impacted by user preferences.
+Usually the left button will be considered the Primary, and the right will be the Secondary.)
+Applications may need to adjust their handling of mouse buttons 2 and 3 accordingly.
+
+### Terminals Removed
+
+A number of terminals have been removed.
+These are mostly ancient definitions unlikely to be used by anyone, such as `adm3a`.
+
+### High Number Function Keys
+
+Historically terminfo reported function keys with modifiers set as a different
+function key altogether.  For example, Shift-F1 was reported as F13 on XTerm.
+_Tcell_ now prefers to report these using the base key (such as F1) with modifiers added.
+This works on XTerm and VTE based emulators, but some emulators may not support this.
+The new behavior more closely aligns with behavior on Windows platforms.
+
+## New Features in _Tcell_ v2
+
+These features are not breaking, but are introduced in version 2.
+
+### Improved Modifier Support
+
+For terminals that appear to behave like the venerable XTerm, _tcell_
+automatically adds modifier reporting for ALT, CTRL, SHIFT, and META keys
+when the terminal reports them.
+
+### Better Support for Palettes (Themes)
+
+When using a color by its name or palette entry, _Tcell_ now tries to
+use that palette entry as is; this should avoid some inconsistency and respect
+terminal themes correctly.
+
+When true fidelity to RGB values is needed, the new `TrueColor()` API can be used
+to create a direct color, which bypasses the palette altogether.
+
+### Automatic TrueColor Detection
+
+For some terminals, if the `Tc` or `RGB` properties are present in terminfo,
+_Tcell_ will automatically assume the terminal supports 24-bit color.
+
+### ColorReset
+
+A new color value, `ColorReset` can be used on the foreground or background
+to reset the color the default used by the terminal.
+
+### tmux Support
+
+_Tcell_ now has improved support for tmux, when the `$TERM` variable is set to "tmux".
+
+### Strikethrough Support
+
+_Tcell_ has support for strikethrough when the terminal supports it, using the new `StrikeThrough()` API.
+
+### Bracketed Paste Support
+
+_Tcell_ provides the long requested capability to discriminate paste event by using the
+bracketed-paste capability present in some terminals.  This is automatically available on
+terminals that support XTerm style mouse handling, but applications must opt-in to this
+by using the new `EnablePaste()` function.  A new `EventPaste` type of event will be
+delivered when starting and finishing a paste operation.

vendor/github.com/gdamore/tcell/v2/LICENSE

@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
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+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
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+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+       http://www.apache.org/licenses/LICENSE-2.0
+
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vendor/github.com/gdamore/tcell/v2/README-wasm.md

@@ -0,0 +1,61 @@
+# WASM for _Tcell_
+
+You can build _Tcell_ project into a webpage by compiling it slightly differently. This will result in a _Tcell_ project you can embed into another html page, or use as a standalone page.
+
+## Building your project
+
+WASM needs special build flags in order to work. You can build it by executing
+```sh
+GOOS=js GOARCH=wasm go build -o yourfile.wasm
+```
+
+## Additional files
+
+You also need 5 other files in the same directory as the wasm. Four (`tcell.html`, `tcell.js`, `termstyle.css`, and `beep.wav`) are provided in the `webfiles` directory. The last one, `wasm_exec.js`, can be copied from GOROOT into the current directory by executing
+```sh
+cp "$(go env GOROOT)/misc/wasm/wasm_exec.js" ./
+```
+
+In `tcell.js`, you also need to change the constant
+```js
+const wasmFilePath = "yourfile.wasm"
+```
+to the file you outputted to when building.
+
+## Displaying your project
+
+### Standalone
+
+You can see the project (with an white background around the terminal) by serving the directory. You can do this using any framework, including another golang project:
+
+```golang
+// server.go
+
+package main
+
+import (
+	"log"
+	"net/http"
+)
+
+func main() {
+	log.Fatal(http.ListenAndServe(":8080",
+		http.FileServer(http.Dir("/path/to/dir/to/serve")),
+	))
+}
+
+```
+
+To see the webpage with this example, you can type in `localhost:8080/tcell.html` into your browser while `server.go` is running.
+
+### Embedding
+It is recommended to use an iframe if you want to embed the app into a webpage:
+```html
+<iframe src="tcell.html" title="Tcell app"></iframe>
+```
+
+## Other considerations
+
+### Accessing files
+
+`io.Open(filename)` and other related functions for reading file systems do not work; use `http.Get(filename)` instead.

vendor/github.com/gdamore/tcell/v2/README.md

@@ -0,0 +1,290 @@
+<img src="logos/tcell.png" style="float: right"/>
+
+# Tcell
+
+_Tcell_ is a _Go_ package that provides a cell based view for text terminals, like _XTerm_.
+It was inspired by _termbox_, but includes many additional improvements.
+
+[![Stand With Ukraine](https://raw.githubusercontent.com/vshymanskyy/StandWithUkraine/main/badges/StandWithUkraine.svg)](https://stand-with-ukraine.pp.ua)
+[![Linux](https://img.shields.io/github/actions/workflow/status/gdamore/tcell/linux.yml?branch=main&logoColor=grey&logo=linux&label=)](https://github.com/gdamore/tcell/actions/workflows/linux.yml)
+[![Windows](https://img.shields.io/github/actions/workflow/status/gdamore/tcell/windows.yml?branch=main&logoColor=grey&logo=windows&label=)](https://github.com/gdamore/tcell/actions/workflows/windows.yml)
+[![Apache License](https://img.shields.io/github/license/gdamore/tcell.svg?logoColor=silver&logo=opensourceinitiative&color=blue&label=)](https://github.com/gdamore/tcell/blob/master/LICENSE)
+[![Docs](https://img.shields.io/badge/godoc-reference-blue.svg?label=&logo=go)](https://pkg.go.dev/github.com/gdamore/tcell/v2)
+[![Discord](https://img.shields.io/discord/639503822733180969?label=&logo=discord)](https://discord.gg/urTTxDN)
+[![Coverage](https://img.shields.io/codecov/c/github/gdamore/tcell?logoColor=grey&logo=codecov&label=)](https://codecov.io/gh/gdamore/tcell)
+[![Go Report Card](https://goreportcard.com/badge/github.com/gdamore/tcell/v2)](https://goreportcard.com/report/github.com/gdamore/tcell/v2)
+
+Please see [here](UKRAINE.md) for an important message for the people of Russia.
+
+NOTE: This is version 2 of _Tcell_. There are breaking changes relative to version 1.
+Version 1.x remains available using the import `github.com/gdamore/tcell`.
+
+## Tutorial
+
+A brief, and still somewhat rough, [tutorial](TUTORIAL.md) is available.
+
+## Examples
+
+- [proxima5](https://github.com/gdamore/proxima5) - space shooter ([video](https://youtu.be/jNxKTCmY_bQ))
+- [govisor](https://github.com/gdamore/govisor) - service management UI ([screenshot](http://2.bp.blogspot.com/--OsvnfzSNow/Vf7aqMw3zXI/AAAAAAAAARo/uOMtOvw4Sbg/s1600/Screen%2BShot%2B2015-09-20%2Bat%2B9.08.41%2BAM.png))
+- mouse demo - included mouse test ([screenshot](http://2.bp.blogspot.com/-fWvW5opT0es/VhIdItdKqJI/AAAAAAAAATE/7Ojc0L1SpB0/s1600/Screen%2BShot%2B2015-10-04%2Bat%2B11.47.13%2BPM.png))
+- [gomatrix](https://github.com/gdamore/gomatrix) - converted from Termbox
+- [micro](https://github.com/zyedidia/micro/) - lightweight text editor with syntax-highlighting and themes
+- [godu](https://github.com/viktomas/godu) - utility to discover large files/folders
+- [tview](https://github.com/rivo/tview/) - rich interactive widgets
+- [cview](https://code.rocketnine.space/tslocum/cview) - user interface toolkit (fork of _tview_)
+- [awesome gocui](https://github.com/awesome-gocui/gocui) - Go Console User Interface
+- [gomandelbrot](https://github.com/rgm3/gomandelbrot) - Mandelbrot!
+- [WTF](https://github.com/senorprogrammer/wtf) - personal information dashboard
+- [browsh](https://github.com/browsh-org/browsh) - modern web browser ([video](https://www.youtube.com/watch?v=HZq86XfBoRo))
+- [go-life](https://github.com/sachaos/go-life) - Conway's Game of Life
+- [gowid](https://github.com/gcla/gowid) - compositional widgets for terminal UIs, inspired by _urwid_
+- [termshark](https://termshark.io) - interface for _tshark_, inspired by Wireshark, built on _gowid_
+- [go-tetris](https://github.com/MichaelS11/go-tetris) - Go Tetris with AI option
+- [fzf](https://github.com/junegunn/fzf) - command-line fuzzy finder
+- [ascii-fluid](https://github.com/esimov/ascii-fluid) - fluid simulation controlled by webcam
+- [cbind](https://code.rocketnine.space/tslocum/cbind) - key event encoding, decoding and handling
+- [tpong](https://github.com/spinzed/tpong) - old-school Pong
+- [aerc](https://git.sr.ht/~sircmpwn/aerc) - email client
+- [tblogs](https://github.com/ezeoleaf/tblogs) - development blogs reader
+- [spinc](https://github.com/lallassu/spinc) - _irssi_ inspired chat application for Cisco Spark/WebEx
+- [gorss](https://github.com/lallassu/gorss) - RSS/Atom feed reader
+- [memoryalike](https://github.com/Bios-Marcel/memoryalike) - memorization game
+- [lf](https://github.com/gokcehan/lf) - file manager
+- [goful](https://github.com/anmitsu/goful) - CUI file manager
+- [gokeybr](https://github.com/bunyk/gokeybr) - deliberately practice your typing
+- [gonano](https://github.com/jbaramidze/gonano) - editor, mimics _nano_
+- [uchess](https://github.com/tmountain/uchess) - UCI chess client
+- [min](https://github.com/a-h/min) - Gemini browser
+- [ov](https://github.com/noborus/ov) - file pager
+- [tmux-wormhole](https://github.com/gcla/tmux-wormhole) - _tmux_ plugin to transfer files
+- [gruid-tcell](https://github.com/anaseto/gruid-tcell) - driver for the grid based UI and game framework
+- [aretext](https://github.com/aretext/aretext) - minimalist text editor with _vim_ key bindings
+- [sync](https://github.com/kyprifog/sync) - GitHub repo synchronization tool
+- [statusbar](https://github.com/kyprifog/statusbar) - statusbar motivation tool for tracking periodic tasks/goals
+- [todo](https://github.com/kyprifog/todo) - simple todo app
+- [gosnakego](https://github.com/liweiyi88/gosnakego) - a snake game
+- [gbb](https://github.com/sdemingo/gbb) - A classical bulletin board app for tildes or public unix servers
+- [lil](https://github.com/andrievsky/lil) - A simple and flexible interface for any service by implementing only list and get operations
+- [hero.go](https://github.com/barisbll/hero.go) - 2d monster shooter ([video](https://user-images.githubusercontent.com/40062673/277157369-240d7606-b471-4aa1-8c54-4379a513122b.mp4))
+- [go-tetris](https://github.com/aaronriekenberg/go-tetris) - simple tetris game for native terminal and WASM using github actions+pages
+- [oddshub](https://github.com/dos-2/oddshub) - A TUI designed for analyzing sports betting odds
+
+## Pure Go Terminfo Database
+
+_Tcell_ includes a full parser and expander for terminfo capability strings,
+so that it can avoid hard coding escape strings for formatting. It also favors
+portability, and includes support for all POSIX systems.
+
+The database is also flexible & extensible, and can be modified by either running
+a program to build the entire database, or an entry for just a single terminal.
+
+## More Portable
+
+_Tcell_ is portable to a wide variety of systems, and is pure Go, without
+any need for CGO.
+_Tcell_ is believed to work with mainstream systems officially supported by golang.
+
+## No Async IO
+
+_Tcell_ is able to operate without requiring `SIGIO` signals (unlike _termbox_),
+or asynchronous I/O, and can instead use standard Go file objects and Go routines.
+This means it should be safe, especially for
+use with programs that use exec, or otherwise need to manipulate the tty streams.
+This model is also much closer to idiomatic Go, leading to fewer surprises.
+
+## Rich Unicode & non-Unicode support
+
+_Tcell_ includes enhanced support for Unicode, including wide characters and
+combining characters, provided your terminal can support them.
+Note that
+Windows terminals generally don't support the full Unicode repertoire.
+
+It will also convert to and from Unicode locales, so that the program
+can work with UTF-8 internally, and get reasonable output in other locales.
+_Tcell_ tries hard to convert to native characters on both input and output.
+On output _Tcell_ even makes use of the alternate character set to facilitate
+drawing certain characters.
+
+## More Function Keys
+
+_Tcell_ also has richer support for a larger number of special keys that some
+terminals can send.
+
+## Better Color Handling
+
+_Tcell_ will respect your terminal's color space as specified within your terminfo entries.
+For example attempts to emit color sequences on VT100 terminals
+won't result in unintended consequences.
+
+In legacy Windows mode, _Tcell_ supports 16 colors, bold, dim, and reverse,
+instead of just termbox's 8 colors with reverse. (Note that there is some
+conflation with bold/dim and colors.)
+Modern Windows 10 can benefit from much richer colors however.
+
+_Tcell_ maps 16 colors down to 8, for terminals that need it.
+(The upper 8 colors are just brighter versions of the lower 8.)
+
+## Better Mouse Support
+
+_Tcell_ supports enhanced mouse tracking mode, so your application can receive
+regular mouse motion events, and wheel events, if your terminal supports it.
+
+(Note: The Windows 10 Terminal application suffers from a flaw in this regard,
+and does not support mouse interaction. The stock Windows 10 console host
+fired up with cmd.exe or PowerShell works fine however.)
+
+## _Termbox_ Compatibility
+
+A compatibility layer for _termbox_ is provided in the `compat` directory.
+To use it, try importing `github.com/gdamore/tcell/termbox` instead.
+Most _termbox-go_ programs will probably work without further modification.
+
+## Working With Unicode
+
+Internally _Tcell_ uses UTF-8, just like Go.
+However, _Tcell_ understands how to
+convert to and from other character sets, using the capabilities of
+the `golang.org/x/text/encoding` packages.
+Your application must supply
+them, as the full set of the most common ones bloats the program by about 2 MB.
+If you're lazy, and want them all anyway, see the `encoding` sub-directory.
+
+## Wide & Combining Characters
+
+The `SetContent()` API takes a primary rune, and an optional list of combining runes.
+If any of the runes is a wide (East Asian) rune occupying two cells,
+then the library will skip output from the following cell. Care must be
+taken in the application to avoid explicitly attempting to set content in the
+next cell, otherwise the results are undefined. (Normally the wide character
+is displayed, and the other character is not; do not depend on that behavior.)
+
+Older terminal applications (especially on systems like Windows 8) lack support
+for advanced Unicode, and thus may not fare well.
+
+## Colors
+
+_Tcell_ assumes the ANSI/XTerm color model, including the 256 color map that
+XTerm uses when it supports 256 colors. The terminfo guidance will be
+honored, with respect to the number of colors supported. Also, only
+terminals which expose ANSI style `setaf` and `setab` will support color;
+if you have a color terminal that only has `setf` and `setb`, please submit
+a ticket.
+
+## 24-bit Color
+
+_Tcell_ _supports 24-bit color!_ (That is, if your terminal can support it.)
+
+NOTE: Technically the approach of using 24-bit RGB values for color is more
+accurately described as "direct color", but most people use the term "true color".
+We follow the (inaccurate) common convention.
+
+There are a few ways you can enable (or disable) true color.
+
+- For many terminals, we can detect it automatically if your terminal
+  includes the `RGB` or `Tc` capabilities (or rather it did when the database
+  was updated.)
+
+- You can force this one by setting the `COLORTERM` environment variable to
+  `24-bit`, `truecolor` or `24bit`. This is the same method used
+  by most other terminal applications that support 24-bit color.
+
+- If you set your `TERM` environment variable to a value with the suffix `-truecolor`
+  then 24-bit color compatible with XTerm and ECMA-48 will be assumed.
+  (This feature is deprecated.
+  It is recommended to use one of other methods listed above.)
+
+- You can disable 24-bit color by setting `TCELL_TRUECOLOR=disable` in your
+  environment.
+
+When using TrueColor, programs will display the colors that the programmer
+intended, overriding any "`themes`" you may have set in your terminal
+emulator. (For some cases, accurate color fidelity is more important
+than respecting themes. For other cases, such as typical text apps that
+only use a few colors, its more desirable to respect the themes that
+the user has established.)
+
+## Performance
+
+Reasonable attempts have been made to minimize sending data to terminals,
+avoiding repeated sequences or drawing the same cell on refresh updates.
+
+## Terminfo
+
+(Not relevant for Windows users.)
+
+The Terminfo implementation operates with a built-in database.
+This should satisfy most users. However, it can also (on systems
+with ncurses installed), dynamically parse the output from `infocmp`
+for terminals it does not already know about.
+
+See the `terminfo/` directory for more information about generating
+new entries for the built-in database.
+
+_Tcell_ requires that the terminal support the `cup` mode of cursor addressing.
+Ancient terminals without the ability to position the cursor directly
+are not supported.
+This is unlikely to be a problem; such terminals have not been mass-produced
+since the early 1970s.
+
+## Mouse Support
+
+Mouse support is detected via the `kmous` terminfo variable, however,
+enablement/disablement and decoding mouse events is done using hard coded
+sequences based on the XTerm X11 model. All popular
+terminals with mouse tracking support this model. (Full terminfo support
+is not possible as terminfo sequences are not defined.)
+
+On Windows, the mouse works normally.
+
+Mouse wheel buttons on various terminals are known to work, but the support
+in terminal emulators, as well as support for various buttons and
+live mouse tracking, varies widely.
+Modern _xterm_, macOS _Terminal_, and _iTerm_ all work well.
+
+## Bracketed Paste
+
+Terminals that appear to support the XTerm mouse model also can support
+bracketed paste, for applications that opt-in. See `EnablePaste()` for details.
+
+## Testability
+
+There is a `SimulationScreen`, that can be used to simulate a real screen
+for automated testing. The supplied tests do this. The simulation contains
+event delivery, screen resizing support, and capabilities to inject events
+and examine "`physical`" screen contents.
+
+## Platforms
+
+### POSIX (Linux, FreeBSD, macOS, Solaris, etc.)
+
+Everything works using pure Go on mainstream platforms. Some more esoteric
+platforms (e.g., AIX) may need to be added. Pull requests are welcome!
+
+### Windows
+
+Windows console mode applications are supported.
+
+Modern console applications like ConEmu and the Windows 10 terminal,
+support all the good features (resize, mouse tracking, etc.)
+
+### WASM
+
+WASM is supported, but needs additional setup detailed in [README-wasm](README-wasm.md).
+
+### Plan9 and others
+
+These platforms won't work, but compilation stubs are supplied
+for folks that want to include parts of this in software for those
+platforms. The Simulation screen works, but as _Tcell_ doesn't know how to
+allocate a real screen object on those platforms, `NewScreen()` will fail.
+
+If anyone has wisdom about how to improve support for these,
+please let me know. PRs are especially welcome.
+
+### Commercial Support
+
+_Tcell_ is absolutely free, but if you want to obtain commercial, professional support, there are options.
+
+- [TideLift](https://tidelift.com/) subscriptions include support for _Tcell_, as well as many other open source packages.
+- [Staysail Systems Inc.](mailto:info@staysail.tech) offers direct support, and custom development around _Tcell_ on an hourly basis.

vendor/github.com/gdamore/tcell/v2/SECURITY.md

@@ -0,0 +1,15 @@
+# SECURITY
+
+It's somewhat unlikely that tcell is in a security sensitive path,
+but we do take security seriously.
+
+## Vulnerabilityu Response
+
+If you report a vulnerability, we will respond within 2 business days.
+
+## Report a Vulnerability
+
+If you wish to report a vulnerability found in tcell, simply send a message
+to garrett@damore.org.  You may also reach us on our discord channel -
+https://discord.gg/urTTxDN - a private message to `gdamore` on that channel
+may be submitted instead of mail.

vendor/github.com/gdamore/tcell/v2/TUTORIAL.md

@@ -0,0 +1,313 @@
+# _Tcell_ Tutorial
+
+_Tcell_ provides a low-level, portable API for building terminal-based programs.
+A [terminal emulator](https://en.wikipedia.org/wiki/Terminal_emulator)
+(or a real terminal such as a DEC VT-220) is used to interact with such a program.
+
+_Tcell_'s interface is fairly low-level.
+While it provides a reasonably portable way of dealing with all the usual terminal
+features, it may be easier to utilize a higher level framework.
+A number of such frameworks are listed on the _Tcell_ main [README](README.md).
+
+This tutorial provides the details of _Tcell_, and is appropriate for developers
+wishing to create their own application frameworks or needing more direct access
+to the terminal capabilities.
+
+## Resize events
+
+Applications receive an event of type `EventResize` when they are first initialized and each time the terminal is resized.
+The new size is available as `Size`.
+
+```go
+switch ev := ev.(type) {
+case *tcell.EventResize:
+	w, h := ev.Size()
+	logMessage(fmt.Sprintf("Resized to %dx%d", w, h))
+}
+```
+
+## Key events
+
+When a key is pressed, applications receive an event of type `EventKey`.
+This event describes the modifier keys pressed (if any) and the pressed key or rune.
+
+When a rune key is pressed, an event with its `Key` set to `KeyRune` is dispatched.
+
+When a non-rune key is pressed, it is available as the `Key` of the event.
+
+```go
+switch ev := ev.(type) {
+case *tcell.EventKey:
+    mod, key, ch := ev.Mod(), ev.Key(), ev.Rune()
+    logMessage(fmt.Sprintf("EventKey Modifiers: %d Key: %d Rune: %d", mod, key, ch))
+}
+```
+
+### Key event restrictions
+
+Terminal-based programs have less visibility into keyboard activity than graphical applications.
+
+When a key is pressed and held, additional key press events are sent by the terminal emulator.
+The rate of these repeated events depends on the emulator's configuration.
+Key release events are not available.
+
+It is not possible to distinguish runes typed while holding shift and runes typed using caps lock.
+Capital letters are reported without the Shift modifier.
+
+## Mouse events
+
+Applications receive an event of type `EventMouse` when the mouse moves, or a mouse button is pressed or released.
+Mouse events are only delivered if
+`EnableMouse` has been called.
+
+The mouse buttons being pressed (if any) are available as `Buttons`, and the position of the mouse is available as `Position`.
+
+```go
+switch ev := ev.(type) {
+case *tcell.EventMouse:
+	mod := ev.Modifiers()
+	btns := ev.Buttons()
+	x, y := ev.Position()
+	logMessage(fmt.Sprintf("EventMouse Modifiers: %d Buttons: %d Position: %d,%d", mod, btns, x, y))
+}
+```
+
+### Mouse buttons
+
+Identifier | Alias           | Description
+-----------|-----------------|-----------
+Button1    | ButtonPrimary   | Left button
+Button2    | ButtonSecondary | Right button
+Button3    | ButtonMiddle    | Middle button
+Button4    |                 | Side button (thumb/next)
+Button5    |                 | Side button (thumb/prev)
+WheelUp    |                 | Scroll wheel up
+WheelDown  |                 | Scroll wheel down
+WheelLeft  |                 | Horizontal wheel left
+WheelRight |                 | Horizontal wheel right
+
+## Usage
+
+To create a _Tcell_ application, first initialize a screen to hold it.
+
+```go
+s, err := tcell.NewScreen()
+if err != nil {
+	log.Fatalf("%+v", err)
+}
+if err := s.Init(); err != nil {
+	log.Fatalf("%+v", err)
+}
+
+// Set default text style
+defStyle := tcell.StyleDefault.Background(tcell.ColorReset).Foreground(tcell.ColorReset)
+s.SetStyle(defStyle)
+
+// Clear screen
+s.Clear()
+```
+
+Text may be drawn on the screen using `SetContent`.
+
+```go
+s.SetContent(0, 0, 'H', nil, defStyle)
+s.SetContent(1, 0, 'i', nil, defStyle)
+s.SetContent(2, 0, '!', nil, defStyle)
+```
+
+To draw text more easily, define a render function.
+
+```go
+func drawText(s tcell.Screen, x1, y1, x2, y2 int, style tcell.Style, text string) {
+	row := y1
+	col := x1
+	for _, r := range []rune(text) {
+		s.SetContent(col, row, r, nil, style)
+		col++
+		if col >= x2 {
+			row++
+			col = x1
+		}
+		if row > y2 {
+			break
+		}
+	}
+}
+```
+
+Lastly, define an event loop to handle user input and update application state.
+
+```go
+quit := func() {
+    s.Fini()
+    os.Exit(0)
+}
+for {
+    // Update screen
+    s.Show()
+
+    // Poll event
+    ev := s.PollEvent()
+
+    // Process event
+    switch ev := ev.(type) {
+    case *tcell.EventResize:
+        s.Sync()
+    case *tcell.EventKey:
+        if ev.Key() == tcell.KeyEscape || ev.Key() == tcell.KeyCtrlC {
+            quit()
+        }
+    }
+}
+```
+
+## Demo application
+
+The following demonstrates how to initialize a screen, draw text/graphics and handle user input.
+
+```go
+package main
+
+import (
+	"fmt"
+	"log"
+
+	"github.com/gdamore/tcell/v2"
+)
+
+func drawText(s tcell.Screen, x1, y1, x2, y2 int, style tcell.Style, text string) {
+	row := y1
+	col := x1
+	for _, r := range []rune(text) {
+		s.SetContent(col, row, r, nil, style)
+		col++
+		if col >= x2 {
+			row++
+			col = x1
+		}
+		if row > y2 {
+			break
+		}
+	}
+}
+
+func drawBox(s tcell.Screen, x1, y1, x2, y2 int, style tcell.Style, text string) {
+	if y2 < y1 {
+		y1, y2 = y2, y1
+	}
+	if x2 < x1 {
+		x1, x2 = x2, x1
+	}
+
+	// Fill background
+	for row := y1; row <= y2; row++ {
+		for col := x1; col <= x2; col++ {
+			s.SetContent(col, row, ' ', nil, style)
+		}
+	}
+
+	// Draw borders
+	for col := x1; col <= x2; col++ {
+		s.SetContent(col, y1, tcell.RuneHLine, nil, style)
+		s.SetContent(col, y2, tcell.RuneHLine, nil, style)
+	}
+	for row := y1 + 1; row < y2; row++ {
+		s.SetContent(x1, row, tcell.RuneVLine, nil, style)
+		s.SetContent(x2, row, tcell.RuneVLine, nil, style)
+	}
+
+	// Only draw corners if necessary
+	if y1 != y2 && x1 != x2 {
+		s.SetContent(x1, y1, tcell.RuneULCorner, nil, style)
+		s.SetContent(x2, y1, tcell.RuneURCorner, nil, style)
+		s.SetContent(x1, y2, tcell.RuneLLCorner, nil, style)
+		s.SetContent(x2, y2, tcell.RuneLRCorner, nil, style)
+	}
+
+	drawText(s, x1+1, y1+1, x2-1, y2-1, style, text)
+}
+
+func main() {
+	defStyle := tcell.StyleDefault.Background(tcell.ColorReset).Foreground(tcell.ColorReset)
+	boxStyle := tcell.StyleDefault.Foreground(tcell.ColorWhite).Background(tcell.ColorPurple)
+
+	// Initialize screen
+	s, err := tcell.NewScreen()
+	if err != nil {
+		log.Fatalf("%+v", err)
+	}
+	if err := s.Init(); err != nil {
+		log.Fatalf("%+v", err)
+	}
+	s.SetStyle(defStyle)
+	s.EnableMouse()
+	s.EnablePaste()
+	s.Clear()
+
+	// Draw initial boxes
+	drawBox(s, 1, 1, 42, 7, boxStyle, "Click and drag to draw a box")
+	drawBox(s, 5, 9, 32, 14, boxStyle, "Press C to reset")
+
+	quit := func() {
+		// You have to catch panics in a defer, clean up, and
+		// re-raise them - otherwise your application can
+		// die without leaving any diagnostic trace.
+		maybePanic := recover()
+		s.Fini()
+		if maybePanic != nil {
+			panic(maybePanic)
+		}
+	}
+	defer quit()
+
+	// Here's how to get the screen size when you need it.
+	// xmax, ymax := s.Size()
+
+	// Here's an example of how to inject a keystroke where it will
+	// be picked up by the next PollEvent call.  Note that the
+	// queue is LIFO, it has a limited length, and PostEvent() can
+	// return an error.
+	// s.PostEvent(tcell.NewEventKey(tcell.KeyRune, rune('a'), 0))
+
+	// Event loop
+	ox, oy := -1, -1
+	for {
+		// Update screen
+		s.Show()
+
+		// Poll event
+		ev := s.PollEvent()
+
+		// Process event
+		switch ev := ev.(type) {
+		case *tcell.EventResize:
+			s.Sync()
+		case *tcell.EventKey:
+			if ev.Key() == tcell.KeyEscape || ev.Key() == tcell.KeyCtrlC {
+				return
+			} else if ev.Key() == tcell.KeyCtrlL {
+				s.Sync()
+			} else if ev.Rune() == 'C' || ev.Rune() == 'c' {
+				s.Clear()
+			}
+		case *tcell.EventMouse:
+			x, y := ev.Position()
+
+			switch ev.Buttons() {
+			case tcell.Button1, tcell.Button2:
+				if ox < 0 {
+					ox, oy = x, y // record location when click started
+				}
+
+			case tcell.ButtonNone:
+				if ox >= 0 {
+					label := fmt.Sprintf("%d,%d to %d,%d", ox, oy, x, y)
+					drawBox(s, ox, oy, x, y, boxStyle, label)
+					ox, oy = -1, -1
+				}
+			}
+		}
+	}
+}
+```
+

vendor/github.com/gdamore/tcell/v2/UKRAINE.md

@@ -0,0 +1,77 @@
+# Ukraine, Russia, and a World Tragedy
+
+## A message to those inside Russia
+
+### Written March 4, 2022.
+
+It is with a very heavy heart that I write this.  I am normally opposed to the use of open source
+projects to communicate political positions or advocate for things outside the immediate relevancy
+to that project.
+
+However, the events occurring in Ukraine, and specifically the unprecedented invasion of Ukraine by
+Russian forces operating under orders from Russian President Vladimir Putin compel me to speak out.
+
+Those who know me, know that I have family, friends, and colleagues in Russia, and Ukraine both.  My closest friends
+have historically been Russian friends my wife's hometown of Chelyabinsk.  I myself have in the past
+frequently traveled to Russia, and indeed operated a software development firm with offices in St. Petersburg.
+I had a special kinship with Russia and its people.
+
+I say "had", because I fear that the actions of Putin, and the massive disinformation campaign that his regime
+has waged inside Russia, mean that it's likely that I won't see those friends again.  At present, I'm not sure
+my wife will see her own mother again.  We no longer feel it's safe for either of us to return Russia given
+actions taken by the regime to crack down on those who express disagreement.
+
+Russian citizens are being led to believe it is acting purely defensively, and that only legitimate military
+targets are being targeted, and that all the information we have received in the West are fakes.
+
+I am confident that nothing could be further from the truth.
+
+This has caused many in Russia, including people whom I respect and believe to be smarter than this, to
+stand by Putin, and endorse his actions. The claim is that the entirety of NATO is operating at the behest
+of the USA, and that the entirety of Europe was poised to attack Russia. While this is clearly absurd to those
+of us with any understanding of western politics, Russian citizens are being fed this lie, and believing it.
+
+If you're reading this from inside Russia -- YOU are the person that I hope this message reaches.  Your
+government is LYING to you.  Of course, all governments lie all the time.  But consider this.  Almost the
+entire world has condemned the invasion of Ukraine as criminal, and has applied sanctions.  Even countries
+which have poor relations with the US sanctioning Russia, as well as nations which historically have remained
+neutral.  (Famously neutral -- even during World War II, Switzerland has acted to apply sanctions in
+concert with the rest of the world.)
+
+Ask yourself, why does Putin fear a free press so much, if what he says is true?  Why the crack-downs on
+children expressing only a desire for peace with Ukraine?  Why would the entire world unified against him,
+if Putin was in the right?  Why would the only countries that stood with Russia against
+the UN resolution to condemn these acts as crimes be Belarus, North Korea, and Syria?  Even countries normally
+allied to Russia could not bring themselves to do more than abstain from the vote to condemn it.
+
+To be clear, I do not claim that the actions taken by the West or by the Ukrainian government were completely
+blameless.  On the contrary, I understand that Western media is biased, and the truth is rarely exactly
+as reported.  I believe that there is a kernel of truth in the claims of fascists and ultra-nationalist
+militias operating in Ukraine and specifically Donbas.  However, I am also equally certain that Putin's
+response is out of proportion, and that concerns about such militias are principally just a pretext to justify
+an invasion.
+
+Europe is at war, unlike we've seen in my lifetime.  The world is more divided, and closer to nuclear holocaust
+than it has been since the Cold War. And that is 100% the fault of Putin.
+
+While Putin remains in power, there cannot really be any way for Russian international relations to return
+to normal. Putin has set your country on a path to return to the Cold War, likely because he fancies himself
+to be a new Stalin.  However, unlike the Soviet Union, the Russian economy does not have the wherewithal to
+stand on its own, and the invasion of Ukraine has fully ensured that Russia will not find any friends anywhere
+else in Europe, and probably few places in Asia.
+
+The *only* paths forward for Russia are either a Russia without Putin (and those who would support his agenda),
+or a complete breakdown of Russian prosperity, likely followed by the increasing international conflict that will
+be the natural escalation from a country that is isolated and impoverished. Those of us observing from the West are
+gravely concerned, because we cannot see any end to this madness that does not result in nuclear conflict,
+unless from within.
+
+In the meantime, the worst prices will be paid for by innocents in Ukraine, and by young Russian mean
+forced to carry out the orders of Putin's corrupt regime.
+
+And *that* is why I write this -- to appeal to those within Russia to open your eyes, and think with
+your minds.  It is right and proper to be proud of your country and its rich heritage.  But it is also
+right and proper to look for ways to save it from the ruinous path that its current leadership has set it upon,
+and to recognize when that leadership is no longer acting in interest of the country or its people.
+
+  - Garrett D'Amore, March 4, 2022

vendor/github.com/gdamore/tcell/v2/attr.go

@@ -0,0 +1,34 @@
+// Copyright 2024 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+// AttrMask represents a mask of text attributes, apart from color.
+// Note that support for attributes may vary widely across terminals.
+type AttrMask uint
+
+// Attributes are not colors, but affect the display of text.  They can
+// be combined, in some cases, but not others. (E.g. you can have Dim Italic,
+// but only CurlyUnderline cannot be mixed with DottedUnderline.)
+const (
+	AttrBold AttrMask = 1 << iota
+	AttrBlink
+	AttrReverse
+	AttrUnderline // Deprecated: Use UnderlineStyle
+	AttrDim
+	AttrItalic
+	AttrStrikeThrough
+	AttrInvalid AttrMask = 1 << 31 // Mark the style or attributes invalid
+	AttrNone    AttrMask = 0       // Just normal text.
+)

vendor/github.com/gdamore/tcell/v2/cell.go

@@ -0,0 +1,249 @@
+// Copyright 2024 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"os"
+	"reflect"
+
+	runewidth "github.com/mattn/go-runewidth"
+)
+
+type cell struct {
+	currMain  rune
+	currComb  []rune
+	currStyle Style
+	lastMain  rune
+	lastStyle Style
+	lastComb  []rune
+	width     int
+	lock      bool
+}
+
+// CellBuffer represents a two-dimensional array of character cells.
+// This is primarily intended for use by Screen implementors; it
+// contains much of the common code they need.  To create one, just
+// declare a variable of its type; no explicit initialization is necessary.
+//
+// CellBuffer is not thread safe.
+type CellBuffer struct {
+	w     int
+	h     int
+	cells []cell
+}
+
+// SetContent sets the contents (primary rune, combining runes,
+// and style) for a cell at a given location.  If the background or
+// foreground of the style is set to ColorNone, then the respective
+// color is left un changed.
+func (cb *CellBuffer) SetContent(x int, y int,
+	mainc rune, combc []rune, style Style,
+) {
+	if x >= 0 && y >= 0 && x < cb.w && y < cb.h {
+		c := &cb.cells[(y*cb.w)+x]
+
+		// Wide characters: we want to mark the "wide" cells
+		// dirty as well as the base cell, to make sure we consider
+		// both cells as dirty together.  We only need to do this
+		// if we're changing content
+		if (c.width > 0) && (mainc != c.currMain || len(combc) != len(c.currComb) || (len(combc) > 0 && !reflect.DeepEqual(combc, c.currComb))) {
+			for i := 0; i < c.width; i++ {
+				cb.SetDirty(x+i, y, true)
+			}
+		}
+
+		c.currComb = append([]rune{}, combc...)
+
+		if c.currMain != mainc {
+			c.width = runewidth.RuneWidth(mainc)
+		}
+		c.currMain = mainc
+		if style.fg == ColorNone {
+			style.fg = c.currStyle.fg
+		}
+		if style.bg == ColorNone {
+			style.bg = c.currStyle.bg
+		}
+		c.currStyle = style
+	}
+}
+
+// GetContent returns the contents of a character cell, including the
+// primary rune, any combining character runes (which will usually be
+// nil), the style, and the display width in cells.  (The width can be
+// either 1, normally, or 2 for East Asian full-width characters.)
+func (cb *CellBuffer) GetContent(x, y int) (rune, []rune, Style, int) {
+	var mainc rune
+	var combc []rune
+	var style Style
+	var width int
+	if x >= 0 && y >= 0 && x < cb.w && y < cb.h {
+		c := &cb.cells[(y*cb.w)+x]
+		mainc, combc, style = c.currMain, c.currComb, c.currStyle
+		if width = c.width; width == 0 || mainc < ' ' {
+			width = 1
+			mainc = ' '
+		}
+	}
+	return mainc, combc, style, width
+}
+
+// Size returns the (width, height) in cells of the buffer.
+func (cb *CellBuffer) Size() (int, int) {
+	return cb.w, cb.h
+}
+
+// Invalidate marks all characters within the buffer as dirty.
+func (cb *CellBuffer) Invalidate() {
+	for i := range cb.cells {
+		cb.cells[i].lastMain = rune(0)
+	}
+}
+
+// Dirty checks if a character at the given location needs to be
+// refreshed on the physical display.  This returns true if the cell
+// content is different since the last time it was marked clean.
+func (cb *CellBuffer) Dirty(x, y int) bool {
+	if x >= 0 && y >= 0 && x < cb.w && y < cb.h {
+		c := &cb.cells[(y*cb.w)+x]
+		if c.lock {
+			return false
+		}
+		if c.lastMain == rune(0) {
+			return true
+		}
+		if c.lastMain != c.currMain {
+			return true
+		}
+		if c.lastStyle != c.currStyle {
+			return true
+		}
+		if len(c.lastComb) != len(c.currComb) {
+			return true
+		}
+		for i := range c.lastComb {
+			if c.lastComb[i] != c.currComb[i] {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// SetDirty is normally used to indicate that a cell has
+// been displayed (in which case dirty is false), or to manually
+// force a cell to be marked dirty.
+func (cb *CellBuffer) SetDirty(x, y int, dirty bool) {
+	if x >= 0 && y >= 0 && x < cb.w && y < cb.h {
+		c := &cb.cells[(y*cb.w)+x]
+		if dirty {
+			c.lastMain = rune(0)
+		} else {
+			if c.currMain == rune(0) {
+				c.currMain = ' '
+			}
+			c.lastMain = c.currMain
+			c.lastComb = c.currComb
+			c.lastStyle = c.currStyle
+		}
+	}
+}
+
+// LockCell locks a cell from being drawn, effectively marking it "clean" until
+// the lock is removed. This can be used to prevent tcell from drawing a given
+// cell, even if the underlying content has changed. For example, when drawing a
+// sixel graphic directly to a TTY screen an implementer must lock the region
+// underneath the graphic to prevent tcell from drawing on top of the graphic.
+func (cb *CellBuffer) LockCell(x, y int) {
+	if x < 0 || y < 0 {
+		return
+	}
+	if x >= cb.w || y >= cb.h {
+		return
+	}
+	c := &cb.cells[(y*cb.w)+x]
+	c.lock = true
+}
+
+// UnlockCell removes a lock from the cell and marks it as dirty
+func (cb *CellBuffer) UnlockCell(x, y int) {
+	if x < 0 || y < 0 {
+		return
+	}
+	if x >= cb.w || y >= cb.h {
+		return
+	}
+	c := &cb.cells[(y*cb.w)+x]
+	c.lock = false
+	cb.SetDirty(x, y, true)
+}
+
+// Resize is used to resize the cells array, with different dimensions,
+// while preserving the original contents.  The cells will be invalidated
+// so that they can be redrawn.
+func (cb *CellBuffer) Resize(w, h int) {
+	if cb.h == h && cb.w == w {
+		return
+	}
+
+	newc := make([]cell, w*h)
+	for y := 0; y < h && y < cb.h; y++ {
+		for x := 0; x < w && x < cb.w; x++ {
+			oc := &cb.cells[(y*cb.w)+x]
+			nc := &newc[(y*w)+x]
+			nc.currMain = oc.currMain
+			nc.currComb = oc.currComb
+			nc.currStyle = oc.currStyle
+			nc.width = oc.width
+			nc.lastMain = rune(0)
+		}
+	}
+	cb.cells = newc
+	cb.h = h
+	cb.w = w
+}
+
+// Fill fills the entire cell buffer array with the specified character
+// and style.  Normally choose ' ' to clear the screen.  This API doesn't
+// support combining characters, or characters with a width larger than one.
+// If either the foreground or background are ColorNone, then the respective
+// color is unchanged.
+func (cb *CellBuffer) Fill(r rune, style Style) {
+	for i := range cb.cells {
+		c := &cb.cells[i]
+		c.currMain = r
+		c.currComb = nil
+		cs := style
+		if cs.fg == ColorNone {
+			cs.fg = c.currStyle.fg
+		}
+		if cs.bg == ColorNone {
+			cs.bg = c.currStyle.bg
+		}
+		c.currStyle = cs
+		c.width = 1
+	}
+}
+
+var runeConfig *runewidth.Condition
+
+func init() {
+	// The defaults for the runewidth package are poorly chosen for terminal
+	// applications.  We however will honor the setting in the environment if
+	// it is set.
+	if os.Getenv("RUNEWIDTH_EASTASIAN") == "" {
+		runewidth.DefaultCondition.EastAsianWidth = false
+	}
+}

vendor/github.com/gdamore/tcell/v2/charset_stub.go

@@ -0,0 +1,22 @@
+//go:build plan9 || nacl
+// +build plan9 nacl
+
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+func getCharset() string {
+	return ""
+}

vendor/github.com/gdamore/tcell/v2/charset_unix.go

@@ -0,0 +1,50 @@
+//go:build !windows && !nacl && !plan9
+// +build !windows,!nacl,!plan9
+
+// Copyright 2016 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"os"
+	"strings"
+)
+
+func getCharset() string {
+	// Determine the character set.  This can help us later.
+	// Per POSIX, we search for LC_ALL first, then LC_CTYPE, and
+	// finally LANG.  First one set wins.
+	locale := ""
+	if locale = os.Getenv("LC_ALL"); locale == "" {
+		if locale = os.Getenv("LC_CTYPE"); locale == "" {
+			locale = os.Getenv("LANG")
+		}
+	}
+	if locale == "POSIX" || locale == "C" {
+		return "US-ASCII"
+	}
+	if i := strings.IndexRune(locale, '@'); i >= 0 {
+		locale = locale[:i]
+	}
+	if i := strings.IndexRune(locale, '.'); i >= 0 {
+		locale = locale[i+1:]
+	} else {
+		// Default assumption, and on Linux we can see LC_ALL
+		// without a character set, which we assume implies UTF-8.
+		return "UTF-8"
+	}
+	// XXX: add support for aliases
+	return locale
+}

vendor/github.com/gdamore/tcell/v2/charset_windows.go

@@ -0,0 +1,22 @@
+//go:build windows
+// +build windows
+
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+func getCharset() string {
+	return "UTF-16"
+}

vendor/github.com/gdamore/tcell/v2/colorfit.go

@@ -0,0 +1,53 @@
+// Copyright 2016 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"math"
+
+	"github.com/lucasb-eyer/go-colorful"
+)
+
+// FindColor attempts to find a given color, or the best match possible for it,
+// from the palette given.  This is an expensive operation, so results should
+// be cached by the caller.
+func FindColor(c Color, palette []Color) Color {
+	match := ColorDefault
+	dist := float64(0)
+	r, g, b := c.RGB()
+	c1 := colorful.Color{
+		R: float64(r) / 255.0,
+		G: float64(g) / 255.0,
+		B: float64(b) / 255.0,
+	}
+	for _, d := range palette {
+		r, g, b = d.RGB()
+		c2 := colorful.Color{
+			R: float64(r) / 255.0,
+			G: float64(g) / 255.0,
+			B: float64(b) / 255.0,
+		}
+		// CIE94 is more accurate, but really really expensive.
+		nd := c1.DistanceCIE76(c2)
+		if math.IsNaN(nd) {
+			nd = math.Inf(1)
+		}
+		if match == ColorDefault || nd < dist {
+			match = d
+			dist = nd
+		}
+	}
+	return match
+}

vendor/github.com/gdamore/tcell/v2/console_stub.go

@@ -0,0 +1,24 @@
+//go:build !windows
+// +build !windows
+
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+// NewConsoleScreen returns a console based screen.  This platform
+// doesn't have support for any, so it returns nil and a suitable error.
+func NewConsoleScreen() (Screen, error) {
+	return nil, ErrNoScreen
+}

vendor/github.com/gdamore/tcell/v2/doc.go

@@ -0,0 +1,47 @@
+// Copyright 2018 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package tcell provides a lower-level, portable API for building
+// programs that interact with terminals or consoles.  It works with
+// both common (and many uncommon!) terminals or terminal emulators,
+// and Windows console implementations.
+//
+// It provides support for up to 256 colors, text attributes, and box drawing
+// elements.  A database of terminals built from a real terminfo database
+// is provided, along with code to generate new database entries.
+//
+// Tcell offers very rich support for mice, dependent upon the terminal
+// of course.  (Windows, XTerm, and iTerm 2 are known to work very well.)
+//
+// If the environment is not Unicode by default, such as an ISO8859 based
+// locale or GB18030, Tcell can convert input and output, so that your
+// terminal can operate in whatever locale is most convenient, while the
+// application program can just assume "everything is UTF-8".  Reasonable
+// defaults are used for updating characters to something suitable for
+// display.  Unicode box drawing characters will be converted to use the
+// alternate character set of your terminal, if native conversions are
+// not available.  If no ACS is available, then some ASCII fallbacks will
+// be used.
+//
+// Note that support for non-UTF-8 locales (other than C)  must be enabled
+// by the application using RegisterEncoding() -- we don't have them all
+// enabled by default to avoid bloating the application unnecessarily.
+// (These days UTF-8 is good enough for almost everyone, and nobody should
+// be using legacy locales anymore.)  Also, actual glyphs for various code
+// point will only be displayed if your terminal or emulator (or the font
+// the emulator is using) supports them.
+//
+// A rich set of key codes is supported, with support for up to 65 function
+// keys, and various other special keys.
+package tcell

vendor/github.com/gdamore/tcell/v2/encoding.go

@@ -0,0 +1,140 @@
+// Copyright 2022 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"strings"
+	"sync"
+
+	"golang.org/x/text/encoding"
+
+	gencoding "github.com/gdamore/encoding"
+)
+
+var encodings map[string]encoding.Encoding
+var encodingLk sync.Mutex
+var encodingFallback EncodingFallback = EncodingFallbackFail
+
+// RegisterEncoding may be called by the application to register an encoding.
+// The presence of additional encodings will facilitate application usage with
+// terminal environments where the I/O subsystem does not support Unicode.
+//
+// Windows systems use Unicode natively, and do not need any of the encoding
+// subsystem when using Windows Console screens.
+//
+// Please see the Go documentation for golang.org/x/text/encoding -- most of
+// the common ones exist already as stock variables.  For example, ISO8859-15
+// can be registered using the following code:
+//
+//	import "golang.org/x/text/encoding/charmap"
+//
+//	  ...
+//	  RegisterEncoding("ISO8859-15", charmap.ISO8859_15)
+//
+// Aliases can be registered as well, for example "8859-15" could be an alias
+// for "ISO8859-15".
+//
+// For POSIX systems, this package will check the environment variables
+// LC_ALL, LC_CTYPE,  and LANG (in that order) to determine the character set.
+// These are expected to have the following pattern:
+//
+//	$language[.$codeset[@$variant]
+//
+// We extract only the $codeset part, which will usually be something like
+// UTF-8 or ISO8859-15 or KOI8-R.  Note that if the locale is either "POSIX"
+// or "C", then we assume US-ASCII (the POSIX 'portable character set'
+// and assume all other characters are somehow invalid.)
+//
+// Modern POSIX systems and terminal emulators may use UTF-8, and for those
+// systems, this API is also unnecessary.  For example, Darwin (MacOS X) and
+// modern Linux running modern xterm generally will out of the box without
+// any of this.  Use of UTF-8 is recommended when possible, as it saves
+// quite a lot processing overhead.
+//
+// Note that some encodings are quite large (for example GB18030 which is a
+// superset of Unicode) and so the application size can be expected to
+// increase quite a bit as each encoding is added.
+
+// The East Asian encodings have been seen to add 100-200K per encoding to the
+// size of the resulting binary.
+func RegisterEncoding(charset string, enc encoding.Encoding) {
+	encodingLk.Lock()
+	charset = strings.ToLower(charset)
+	encodings[charset] = enc
+	encodingLk.Unlock()
+}
+
+// EncodingFallback describes how the system behaves when the locale
+// requires a character set that we do not support.  The system always
+// supports UTF-8 and US-ASCII. On Windows consoles, UTF-16LE is also
+// supported automatically.  Other character sets must be added using the
+// RegisterEncoding API.  (A large group of nearly all of them can be
+// added using the RegisterAll function in the encoding sub package.)
+type EncodingFallback int
+
+const (
+	// EncodingFallbackFail behavior causes GetEncoding to fail
+	// when it cannot find an encoding.
+	EncodingFallbackFail = iota
+
+	// EncodingFallbackASCII behavior causes GetEncoding to fall back
+	// to a 7-bit ASCII encoding, if no other encoding can be found.
+	EncodingFallbackASCII
+
+	// EncodingFallbackUTF8 behavior causes GetEncoding to assume
+	// UTF8 can pass unmodified upon failure.  Note that this behavior
+	// is not recommended, unless you are sure your terminal can cope
+	// with real UTF8 sequences.
+	EncodingFallbackUTF8
+)
+
+// SetEncodingFallback changes the behavior of GetEncoding when a suitable
+// encoding is not found.  The default is EncodingFallbackFail, which
+// causes GetEncoding to simply return nil.
+func SetEncodingFallback(fb EncodingFallback) {
+	encodingLk.Lock()
+	encodingFallback = fb
+	encodingLk.Unlock()
+}
+
+// GetEncoding is used by Screen implementors who want to locate an encoding
+// for the given character set name.  Note that this will return nil for
+// either the Unicode (UTF-8) or ASCII encodings, since we don't use
+// encodings for them but instead have our own native methods.
+func GetEncoding(charset string) encoding.Encoding {
+	charset = strings.ToLower(charset)
+	encodingLk.Lock()
+	defer encodingLk.Unlock()
+	if enc, ok := encodings[charset]; ok {
+		return enc
+	}
+	switch encodingFallback {
+	case EncodingFallbackASCII:
+		return gencoding.ASCII
+	case EncodingFallbackUTF8:
+		return encoding.Nop
+	}
+	return nil
+}
+
+func init() {
+	// We always support UTF-8 and ASCII.
+	encodings = make(map[string]encoding.Encoding)
+	encodings["utf-8"] = gencoding.UTF8
+	encodings["utf8"] = gencoding.UTF8
+	encodings["us-ascii"] = gencoding.ASCII
+	encodings["ascii"] = gencoding.ASCII
+	encodings["iso646"] = gencoding.ASCII
+}

vendor/github.com/gdamore/tcell/v2/errors.go

@@ -0,0 +1,73 @@
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"errors"
+	"time"
+
+	"github.com/gdamore/tcell/v2/terminfo"
+)
+
+var (
+	// ErrTermNotFound indicates that a suitable terminal entry could
+	// not be found.  This can result from either not having TERM set,
+	// or from the TERM failing to support certain minimal functionality,
+	// in particular absolute cursor addressability (the cup capability)
+	// is required.  For example, legacy "adm3" lacks this capability,
+	// whereas the slightly newer "adm3a" supports it.  This failure
+	// occurs most often with "dumb".
+	ErrTermNotFound = terminfo.ErrTermNotFound
+
+	// ErrNoScreen indicates that no suitable screen could be found.
+	// This may result from attempting to run on a platform where there
+	// is no support for either termios or console I/O (such as nacl),
+	// or from running in an environment where there is no access to
+	// a suitable console/terminal device.  (For example, running on
+	// without a controlling TTY or with no /dev/tty on POSIX platforms.)
+	ErrNoScreen = errors.New("no suitable screen available")
+
+	// ErrNoCharset indicates that the locale environment the
+	// program is not supported by the program, because no suitable
+	// encoding was found for it.  This problem never occurs if
+	// the environment is UTF-8 or UTF-16.
+	ErrNoCharset = errors.New("character set not supported")
+
+	// ErrEventQFull indicates that the event queue is full, and
+	// cannot accept more events.
+	ErrEventQFull = errors.New("event queue full")
+)
+
+// An EventError is an event representing some sort of error, and carries
+// an error payload.
+type EventError struct {
+	t   time.Time
+	err error
+}
+
+// When returns the time when the event was created.
+func (ev *EventError) When() time.Time {
+	return ev.t
+}
+
+// Error implements the error.
+func (ev *EventError) Error() string {
+	return ev.err.Error()
+}
+
+// NewEventError creates an ErrorEvent with the given error payload.
+func NewEventError(err error) *EventError {
+	return &EventError{t: time.Now(), err: err}
+}

vendor/github.com/gdamore/tcell/v2/event.go

@@ -0,0 +1,53 @@
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"time"
+)
+
+// Event is a generic interface used for passing around Events.
+// Concrete types follow.
+type Event interface {
+	// When reports the time when the event was generated.
+	When() time.Time
+}
+
+// EventTime is a simple base event class, suitable for easy reuse.
+// It can be used to deliver actual timer events as well.
+type EventTime struct {
+	when time.Time
+}
+
+// When returns the time stamp when the event occurred.
+func (e *EventTime) When() time.Time {
+	return e.when
+}
+
+// SetEventTime sets the time of occurrence for the event.
+func (e *EventTime) SetEventTime(t time.Time) {
+	e.when = t
+}
+
+// SetEventNow sets the time of occurrence for the event to the current time.
+func (e *EventTime) SetEventNow() {
+	e.SetEventTime(time.Now())
+}
+
+// EventHandler is anything that handles events.  If the handler has
+// consumed the event, it should return true.  False otherwise.
+type EventHandler interface {
+	HandleEvent(Event) bool
+}

vendor/github.com/gdamore/tcell/v2/focus.go

@@ -0,0 +1,28 @@
+// Copyright 2023 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+// EventFocus is a focus event. It is sent when the terminal window (or tab)
+// gets or loses focus.
+type EventFocus struct {
+	*EventTime
+
+	// True if the window received focus, false if it lost focus
+	Focused bool
+}
+
+func NewEventFocus(focused bool) *EventFocus {
+	return &EventFocus{Focused: focused}
+}

vendor/github.com/gdamore/tcell/v2/interrupt.go

@@ -0,0 +1,41 @@
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"time"
+)
+
+// EventInterrupt is a generic wakeup event.  Its can be used to
+// to request a redraw.  It can carry an arbitrary payload, as well.
+type EventInterrupt struct {
+	t time.Time
+	v interface{}
+}
+
+// When returns the time when this event was created.
+func (ev *EventInterrupt) When() time.Time {
+	return ev.t
+}
+
+// Data is used to obtain the opaque event payload.
+func (ev *EventInterrupt) Data() interface{} {
+	return ev.v
+}
+
+// NewEventInterrupt creates an EventInterrupt with the given payload.
+func NewEventInterrupt(data interface{}) *EventInterrupt {
+	return &EventInterrupt{t: time.Now(), v: data}
+}

vendor/github.com/gdamore/tcell/v2/key.go

@@ -0,0 +1,470 @@
+// Copyright 2016 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"fmt"
+	"strings"
+	"time"
+)
+
+// EventKey represents a key press.  Usually this is a key press followed
+// by a key release, but since terminal programs don't have a way to report
+// key release events, we usually get just one event.  If a key is held down
+// then the terminal may synthesize repeated key presses at some predefined
+// rate.  We have no control over that, nor visibility into it.
+//
+// In some cases, we can have a modifier key, such as ModAlt, that can be
+// generated with a key press.  (This usually is represented by having the
+// high bit set, or in some cases, by sending an ESC prior to the rune.)
+//
+// If the value of Key() is KeyRune, then the actual key value will be
+// available with the Rune() method.  This will be the case for most keys.
+// In most situations, the modifiers will not be set.  For example, if the
+// rune is 'A', this will be reported without the ModShift bit set, since
+// really can't tell if the Shift key was pressed (it might have been CAPSLOCK,
+// or a terminal that only can send capitals, or keyboard with separate
+// capital letters from lower case letters).
+//
+// Generally, terminal applications have far less visibility into keyboard
+// activity than graphical applications.  Hence, they should avoid depending
+// overly much on availability of modifiers, or the availability of any
+// specific keys.
+type EventKey struct {
+	t   time.Time
+	mod ModMask
+	key Key
+	ch  rune
+}
+
+// When returns the time when this Event was created, which should closely
+// match the time when the key was pressed.
+func (ev *EventKey) When() time.Time {
+	return ev.t
+}
+
+// Rune returns the rune corresponding to the key press, if it makes sense.
+// The result is only defined if the value of Key() is KeyRune.
+func (ev *EventKey) Rune() rune {
+	return ev.ch
+}
+
+// Key returns a virtual key code.  We use this to identify specific key
+// codes, such as KeyEnter, etc.  Most control and function keys are reported
+// with unique Key values.  Normal alphanumeric and punctuation keys will
+// generally return KeyRune here; the specific key can be further decoded
+// using the Rune() function.
+func (ev *EventKey) Key() Key {
+	return ev.key
+}
+
+// Modifiers returns the modifiers that were present with the key press.  Note
+// that not all platforms and terminals support this equally well, and some
+// cases we will not not know for sure.  Hence, applications should avoid
+// using this in most circumstances.
+func (ev *EventKey) Modifiers() ModMask {
+	return ev.mod
+}
+
+// KeyNames holds the written names of special keys. Useful to echo back a key
+// name, or to look up a key from a string value.
+var KeyNames = map[Key]string{
+	KeyEnter:          "Enter",
+	KeyBackspace:      "Backspace",
+	KeyTab:            "Tab",
+	KeyBacktab:        "Backtab",
+	KeyEsc:            "Esc",
+	KeyBackspace2:     "Backspace2",
+	KeyDelete:         "Delete",
+	KeyInsert:         "Insert",
+	KeyUp:             "Up",
+	KeyDown:           "Down",
+	KeyLeft:           "Left",
+	KeyRight:          "Right",
+	KeyHome:           "Home",
+	KeyEnd:            "End",
+	KeyUpLeft:         "UpLeft",
+	KeyUpRight:        "UpRight",
+	KeyDownLeft:       "DownLeft",
+	KeyDownRight:      "DownRight",
+	KeyCenter:         "Center",
+	KeyPgDn:           "PgDn",
+	KeyPgUp:           "PgUp",
+	KeyClear:          "Clear",
+	KeyExit:           "Exit",
+	KeyCancel:         "Cancel",
+	KeyPause:          "Pause",
+	KeyPrint:          "Print",
+	KeyF1:             "F1",
+	KeyF2:             "F2",
+	KeyF3:             "F3",
+	KeyF4:             "F4",
+	KeyF5:             "F5",
+	KeyF6:             "F6",
+	KeyF7:             "F7",
+	KeyF8:             "F8",
+	KeyF9:             "F9",
+	KeyF10:            "F10",
+	KeyF11:            "F11",
+	KeyF12:            "F12",
+	KeyF13:            "F13",
+	KeyF14:            "F14",
+	KeyF15:            "F15",
+	KeyF16:            "F16",
+	KeyF17:            "F17",
+	KeyF18:            "F18",
+	KeyF19:            "F19",
+	KeyF20:            "F20",
+	KeyF21:            "F21",
+	KeyF22:            "F22",
+	KeyF23:            "F23",
+	KeyF24:            "F24",
+	KeyF25:            "F25",
+	KeyF26:            "F26",
+	KeyF27:            "F27",
+	KeyF28:            "F28",
+	KeyF29:            "F29",
+	KeyF30:            "F30",
+	KeyF31:            "F31",
+	KeyF32:            "F32",
+	KeyF33:            "F33",
+	KeyF34:            "F34",
+	KeyF35:            "F35",
+	KeyF36:            "F36",
+	KeyF37:            "F37",
+	KeyF38:            "F38",
+	KeyF39:            "F39",
+	KeyF40:            "F40",
+	KeyF41:            "F41",
+	KeyF42:            "F42",
+	KeyF43:            "F43",
+	KeyF44:            "F44",
+	KeyF45:            "F45",
+	KeyF46:            "F46",
+	KeyF47:            "F47",
+	KeyF48:            "F48",
+	KeyF49:            "F49",
+	KeyF50:            "F50",
+	KeyF51:            "F51",
+	KeyF52:            "F52",
+	KeyF53:            "F53",
+	KeyF54:            "F54",
+	KeyF55:            "F55",
+	KeyF56:            "F56",
+	KeyF57:            "F57",
+	KeyF58:            "F58",
+	KeyF59:            "F59",
+	KeyF60:            "F60",
+	KeyF61:            "F61",
+	KeyF62:            "F62",
+	KeyF63:            "F63",
+	KeyF64:            "F64",
+	KeyCtrlA:          "Ctrl-A",
+	KeyCtrlB:          "Ctrl-B",
+	KeyCtrlC:          "Ctrl-C",
+	KeyCtrlD:          "Ctrl-D",
+	KeyCtrlE:          "Ctrl-E",
+	KeyCtrlF:          "Ctrl-F",
+	KeyCtrlG:          "Ctrl-G",
+	KeyCtrlJ:          "Ctrl-J",
+	KeyCtrlK:          "Ctrl-K",
+	KeyCtrlL:          "Ctrl-L",
+	KeyCtrlN:          "Ctrl-N",
+	KeyCtrlO:          "Ctrl-O",
+	KeyCtrlP:          "Ctrl-P",
+	KeyCtrlQ:          "Ctrl-Q",
+	KeyCtrlR:          "Ctrl-R",
+	KeyCtrlS:          "Ctrl-S",
+	KeyCtrlT:          "Ctrl-T",
+	KeyCtrlU:          "Ctrl-U",
+	KeyCtrlV:          "Ctrl-V",
+	KeyCtrlW:          "Ctrl-W",
+	KeyCtrlX:          "Ctrl-X",
+	KeyCtrlY:          "Ctrl-Y",
+	KeyCtrlZ:          "Ctrl-Z",
+	KeyCtrlSpace:      "Ctrl-Space",
+	KeyCtrlUnderscore: "Ctrl-_",
+	KeyCtrlRightSq:    "Ctrl-]",
+	KeyCtrlBackslash:  "Ctrl-\\",
+	KeyCtrlCarat:      "Ctrl-^",
+}
+
+// Name returns a printable value or the key stroke.  This can be used
+// when printing the event, for example.
+func (ev *EventKey) Name() string {
+	s := ""
+	m := []string{}
+	if ev.mod&ModShift != 0 {
+		m = append(m, "Shift")
+	}
+	if ev.mod&ModAlt != 0 {
+		m = append(m, "Alt")
+	}
+	if ev.mod&ModMeta != 0 {
+		m = append(m, "Meta")
+	}
+	if ev.mod&ModCtrl != 0 {
+		m = append(m, "Ctrl")
+	}
+
+	ok := false
+	if s, ok = KeyNames[ev.key]; !ok {
+		if ev.key == KeyRune {
+			s = "Rune[" + string(ev.ch) + "]"
+		} else {
+			s = fmt.Sprintf("Key[%d,%d]", ev.key, int(ev.ch))
+		}
+	}
+	if len(m) != 0 {
+		if ev.mod&ModCtrl != 0 && strings.HasPrefix(s, "Ctrl-") {
+			s = s[5:]
+		}
+		return fmt.Sprintf("%s+%s", strings.Join(m, "+"), s)
+	}
+	return s
+}
+
+// NewEventKey attempts to create a suitable event.  It parses the various
+// ASCII control sequences if KeyRune is passed for Key, but if the caller
+// has more precise information it should set that specifically.  Callers
+// that aren't sure about modifier state (most) should just pass ModNone.
+func NewEventKey(k Key, ch rune, mod ModMask) *EventKey {
+	if k == KeyRune && (ch < ' ' || ch == 0x7f) {
+		// Turn specials into proper key codes.  This is for
+		// control characters and the DEL.
+		k = Key(ch)
+		if mod == ModNone && ch < ' ' {
+			switch Key(ch) {
+			case KeyBackspace, KeyTab, KeyEsc, KeyEnter:
+				// these keys are directly typeable without CTRL
+			default:
+				// most likely entered with a CTRL keypress
+				mod = ModCtrl
+			}
+		}
+	}
+	return &EventKey{t: time.Now(), key: k, ch: ch, mod: mod}
+}
+
+// ModMask is a mask of modifier keys.  Note that it will not always be
+// possible to report modifier keys.
+type ModMask int16
+
+// These are the modifiers keys that can be sent either with a key press,
+// or a mouse event.  Note that as of now, due to the confusion associated
+// with Meta, and the lack of support for it on many/most platforms, the
+// current implementations never use it.  Instead, they use ModAlt, even for
+// events that could possibly have been distinguished from ModAlt.
+const (
+	ModShift ModMask = 1 << iota
+	ModCtrl
+	ModAlt
+	ModMeta
+	ModNone ModMask = 0
+)
+
+// Key is a generic value for representing keys, and especially special
+// keys (function keys, cursor movement keys, etc.)  For normal keys, like
+// ASCII letters, we use KeyRune, and then expect the application to
+// inspect the Rune() member of the EventKey.
+type Key int16
+
+// This is the list of named keys.  KeyRune is special however, in that it is
+// a place holder key indicating that a printable character was sent.  The
+// actual value of the rune will be transported in the Rune of the associated
+// EventKey.
+const (
+	KeyRune Key = iota + 256
+	KeyUp
+	KeyDown
+	KeyRight
+	KeyLeft
+	KeyUpLeft
+	KeyUpRight
+	KeyDownLeft
+	KeyDownRight
+	KeyCenter
+	KeyPgUp
+	KeyPgDn
+	KeyHome
+	KeyEnd
+	KeyInsert
+	KeyDelete
+	KeyHelp
+	KeyExit
+	KeyClear
+	KeyCancel
+	KeyPrint
+	KeyPause
+	KeyBacktab
+	KeyF1
+	KeyF2
+	KeyF3
+	KeyF4
+	KeyF5
+	KeyF6
+	KeyF7
+	KeyF8
+	KeyF9
+	KeyF10
+	KeyF11
+	KeyF12
+	KeyF13
+	KeyF14
+	KeyF15
+	KeyF16
+	KeyF17
+	KeyF18
+	KeyF19
+	KeyF20
+	KeyF21
+	KeyF22
+	KeyF23
+	KeyF24
+	KeyF25
+	KeyF26
+	KeyF27
+	KeyF28
+	KeyF29
+	KeyF30
+	KeyF31
+	KeyF32
+	KeyF33
+	KeyF34
+	KeyF35
+	KeyF36
+	KeyF37
+	KeyF38
+	KeyF39
+	KeyF40
+	KeyF41
+	KeyF42
+	KeyF43
+	KeyF44
+	KeyF45
+	KeyF46
+	KeyF47
+	KeyF48
+	KeyF49
+	KeyF50
+	KeyF51
+	KeyF52
+	KeyF53
+	KeyF54
+	KeyF55
+	KeyF56
+	KeyF57
+	KeyF58
+	KeyF59
+	KeyF60
+	KeyF61
+	KeyF62
+	KeyF63
+	KeyF64
+)
+
+const (
+	// These key codes are used internally, and will never appear to applications.
+	keyPasteStart Key = iota + 16384
+	keyPasteEnd
+)
+
+// These are the control keys.  Note that they overlap with other keys,
+// perhaps.  For example, KeyCtrlH is the same as KeyBackspace.
+const (
+	KeyCtrlSpace Key = iota
+	KeyCtrlA
+	KeyCtrlB
+	KeyCtrlC
+	KeyCtrlD
+	KeyCtrlE
+	KeyCtrlF
+	KeyCtrlG
+	KeyCtrlH
+	KeyCtrlI
+	KeyCtrlJ
+	KeyCtrlK
+	KeyCtrlL
+	KeyCtrlM
+	KeyCtrlN
+	KeyCtrlO
+	KeyCtrlP
+	KeyCtrlQ
+	KeyCtrlR
+	KeyCtrlS
+	KeyCtrlT
+	KeyCtrlU
+	KeyCtrlV
+	KeyCtrlW
+	KeyCtrlX
+	KeyCtrlY
+	KeyCtrlZ
+	KeyCtrlLeftSq // Escape
+	KeyCtrlBackslash
+	KeyCtrlRightSq
+	KeyCtrlCarat
+	KeyCtrlUnderscore
+)
+
+// Special values - these are fixed in an attempt to make it more likely
+// that aliases will encode the same way.
+
+// These are the defined ASCII values for key codes.  They generally match
+// with KeyCtrl values.
+const (
+	KeyNUL Key = iota
+	KeySOH
+	KeySTX
+	KeyETX
+	KeyEOT
+	KeyENQ
+	KeyACK
+	KeyBEL
+	KeyBS
+	KeyTAB
+	KeyLF
+	KeyVT
+	KeyFF
+	KeyCR
+	KeySO
+	KeySI
+	KeyDLE
+	KeyDC1
+	KeyDC2
+	KeyDC3
+	KeyDC4
+	KeyNAK
+	KeySYN
+	KeyETB
+	KeyCAN
+	KeyEM
+	KeySUB
+	KeyESC
+	KeyFS
+	KeyGS
+	KeyRS
+	KeyUS
+	KeyDEL Key = 0x7F
+)
+
+// These keys are aliases for other names.
+const (
+	KeyBackspace  = KeyBS
+	KeyTab        = KeyTAB
+	KeyEsc        = KeyESC
+	KeyEscape     = KeyESC
+	KeyEnter      = KeyCR
+	KeyBackspace2 = KeyDEL
+)

vendor/github.com/gdamore/tcell/v2/mouse.go

@@ -0,0 +1,103 @@
+// Copyright 2020 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"time"
+)
+
+// EventMouse is a mouse event.  It is sent on either mouse up or mouse down
+// events.  It is also sent on mouse motion events - if the terminal supports
+// it.  We make every effort to ensure that mouse release events are delivered.
+// Hence, click drag can be identified by a motion event with the mouse down,
+// without any intervening button release.  On some terminals only the initiating
+// press and terminating release event will be delivered.
+//
+// Mouse wheel events, when reported, may appear on their own as individual
+// impulses; that is, there will normally not be a release event delivered
+// for mouse wheel movements.
+//
+// Most terminals cannot report the state of more than one button at a time --
+// and some cannot report motion events unless a button is pressed.
+//
+// Applications can inspect the time between events to resolve double or
+// triple clicks.
+type EventMouse struct {
+	t   time.Time
+	btn ButtonMask
+	mod ModMask
+	x   int
+	y   int
+}
+
+// When returns the time when this EventMouse was created.
+func (ev *EventMouse) When() time.Time {
+	return ev.t
+}
+
+// Buttons returns the list of buttons that were pressed or wheel motions.
+func (ev *EventMouse) Buttons() ButtonMask {
+	return ev.btn
+}
+
+// Modifiers returns a list of keyboard modifiers that were pressed
+// with the mouse button(s).
+func (ev *EventMouse) Modifiers() ModMask {
+	return ev.mod
+}
+
+// Position returns the mouse position in character cells.  The origin
+// 0, 0 is at the upper left corner.
+func (ev *EventMouse) Position() (int, int) {
+	return ev.x, ev.y
+}
+
+// NewEventMouse is used to create a new mouse event.  Applications
+// shouldn't need to use this; its mostly for screen implementors.
+func NewEventMouse(x, y int, btn ButtonMask, mod ModMask) *EventMouse {
+	return &EventMouse{t: time.Now(), x: x, y: y, btn: btn, mod: mod}
+}
+
+// ButtonMask is a mask of mouse buttons and wheel events.  Mouse button presses
+// are normally delivered as both press and release events.  Mouse wheel events
+// are normally just single impulse events.  Windows supports up to eight
+// separate buttons plus all four wheel directions, but XTerm can only support
+// mouse buttons 1-3 and wheel up/down.  Its not unheard of for terminals
+// to support only one or two buttons (think Macs).  Old terminals, and true
+// emulations (such as vt100) won't support mice at all, of course.
+type ButtonMask int16
+
+// These are the actual button values.  Note that tcell version 1.x reversed buttons
+// two and three on *nix based terminals.  We use button 1 as the primary, and
+// button 2 as the secondary, and button 3 (which is often missing) as the middle.
+const (
+	Button1 ButtonMask = 1 << iota // Usually the left (primary) mouse button.
+	Button2                        // Usually the right (secondary) mouse button.
+	Button3                        // Usually the middle mouse button.
+	Button4                        // Often a side button (thumb/next).
+	Button5                        // Often a side button (thumb/prev).
+	Button6
+	Button7
+	Button8
+	WheelUp                   // Wheel motion up/away from user.
+	WheelDown                 // Wheel motion down/towards user.
+	WheelLeft                 // Wheel motion to left.
+	WheelRight                // Wheel motion to right.
+	ButtonNone ButtonMask = 0 // No button or wheel events.
+
+	ButtonPrimary   = Button1
+	ButtonSecondary = Button2
+	ButtonMiddle    = Button3
+)

vendor/github.com/gdamore/tcell/v2/nonblock_bsd.go

@@ -0,0 +1,43 @@
+// Copyright 2021 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build darwin || dragonfly || freebsd || netbsd || openbsd
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package tcell
+
+import (
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+// BSD systems use TIOC style ioctls.
+
+// tcSetBufParams is used by the tty driver on UNIX systems to configure the
+// buffering parameters (minimum character count and minimum wait time in msec.)
+// This also waits for output to drain first.
+func tcSetBufParams(fd int, vMin uint8, vTime uint8) error {
+	_ = syscall.SetNonblock(fd, true)
+	tio, err := unix.IoctlGetTermios(fd, unix.TIOCGETA)
+	if err != nil {
+		return err
+	}
+	tio.Cc[unix.VMIN] = vMin
+	tio.Cc[unix.VTIME] = vTime
+	if err = unix.IoctlSetTermios(fd, unix.TIOCSETAW, tio); err != nil {
+		return err
+	}
+	return nil
+}

vendor/github.com/gdamore/tcell/v2/nonblock_unix.go

@@ -0,0 +1,41 @@
+// Copyright 2021 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build linux || aix || zos || solaris
+// +build linux aix zos solaris
+
+package tcell
+
+import (
+	"syscall"
+
+	"golang.org/x/sys/unix"
+)
+
+// tcSetBufParams is used by the tty driver on UNIX systems to configure the
+// buffering parameters (minimum character count and minimum wait time in msec.)
+// This also waits for output to drain first.
+func tcSetBufParams(fd int, vMin uint8, vTime uint8) error {
+	_ = syscall.SetNonblock(fd, true)
+	tio, err := unix.IoctlGetTermios(fd, unix.TCGETS)
+	if err != nil {
+		return err
+	}
+	tio.Cc[unix.VMIN] = vMin
+	tio.Cc[unix.VTIME] = vTime
+	if err = unix.IoctlSetTermios(fd, unix.TCSETSW, tio); err != nil {
+		return err
+	}
+	return nil
+}

vendor/github.com/gdamore/tcell/v2/paste.go

@@ -0,0 +1,72 @@
+// Copyright 2024 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"time"
+)
+
+// EventPaste is used to mark the start and end of a bracketed paste.
+//
+// An event with .Start() true will be sent to mark the start of a bracketed paste,
+// followed by a number of keys (string data) for the content, ending with the
+// an event with .End() true.
+type EventPaste struct {
+	start bool
+	t     time.Time
+	data  []byte
+}
+
+// When returns the time when this EventPaste was created.
+func (ev *EventPaste) When() time.Time {
+	return ev.t
+}
+
+// Start returns true if this is the start of a paste.
+func (ev *EventPaste) Start() bool {
+	return ev.start
+}
+
+// End returns true if this is the end of a paste.
+func (ev *EventPaste) End() bool {
+	return !ev.start
+}
+
+// NewEventPaste returns a new EventPaste.
+func NewEventPaste(start bool) *EventPaste {
+	return &EventPaste{t: time.Now(), start: start}
+}
+
+// NewEventClipboard returns a new NewEventClipboard with a data payload
+func NewEventClipboard(data []byte) *EventClipboard {
+	return &EventClipboard{t: time.Now(), data: data}
+}
+
+// EventClipboard represents data from the clipboard,
+// in response to a GetClipboard request.
+type EventClipboard struct {
+	t    time.Time
+	data []byte
+}
+
+// Data returns the attached binary data.
+func (ev *EventClipboard) Data() []byte {
+	return ev.data
+}
+
+// When returns the time when this event was created.
+func (ev *EventClipboard) When() time.Time {
+	return ev.t
+}

vendor/github.com/gdamore/tcell/v2/resize.go

@@ -0,0 +1,66 @@
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+import (
+	"time"
+)
+
+// EventResize is sent when the window size changes.
+type EventResize struct {
+	t  time.Time
+	ws WindowSize
+}
+
+// NewEventResize creates an EventResize with the new updated window size,
+// which is given in character cells.
+func NewEventResize(width, height int) *EventResize {
+	ws := WindowSize{
+		Width:  width,
+		Height: height,
+	}
+	return &EventResize{t: time.Now(), ws: ws}
+}
+
+// When returns the time when the Event was created.
+func (ev *EventResize) When() time.Time {
+	return ev.t
+}
+
+// Size returns the new window size as width, height in character cells.
+func (ev *EventResize) Size() (int, int) {
+	return ev.ws.Width, ev.ws.Height
+}
+
+// PixelSize returns the new window size as width, height in pixels. The size
+// will be 0,0 if the screen doesn't support this feature
+func (ev *EventResize) PixelSize() (int, int) {
+	return ev.ws.PixelWidth, ev.ws.PixelHeight
+}
+
+type WindowSize struct {
+	Width       int
+	Height      int
+	PixelWidth  int
+	PixelHeight int
+}
+
+// CellDimensions returns the dimensions of a single cell, in pixels
+func (ws WindowSize) CellDimensions() (int, int) {
+	if ws.PixelWidth == 0 || ws.PixelHeight == 0 {
+		return 0, 0
+	}
+	return (ws.PixelWidth / ws.Width), (ws.PixelHeight / ws.Height)
+}

vendor/github.com/gdamore/tcell/v2/runes.go

@@ -0,0 +1,111 @@
+// Copyright 2015 The TCell Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use file except in compliance with the License.
+// You may obtain a copy of the license at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tcell
+
+// The names of these constants are chosen to match Terminfo names,
+// modulo case, and changing the prefix from ACS_ to Rune.  These are
+// the runes we provide extra special handling for, with ASCII fallbacks
+// for terminals that lack them.
+const (
+	RuneSterling = '£'
+	RuneDArrow   = '↓'
+	RuneLArrow   = '←'
+	RuneRArrow   = '→'
+	RuneUArrow   = '↑'
+	RuneBullet   = '·'
+	RuneBoard    = '░'
+	RuneCkBoard  = '▒'
+	RuneDegree   = '°'
+	RuneDiamond  = '◆'
+	RuneGEqual   = '≥'
+	RunePi       = 'π'
+	RuneHLine    = '─'
+	RuneLantern  = '§'
+	RunePlus     = '┼'
+	RuneLEqual   = '≤'
+	RuneLLCorner = '└'
+	RuneLRCorner = '┘'
+	RuneNEqual   = '≠'
+	RunePlMinus  = '±'
+	RuneS1       = '⎺'
+	RuneS3       = '⎻'
+	RuneS7       = '⎼'
+	RuneS9       = '⎽'
+	RuneBlock    = '█'
+	RuneTTee     = '┬'
+	RuneRTee     = '┤'
+	RuneLTee     = '├'
+	RuneBTee     = '┴'
+	RuneULCorner = '┌'
+	RuneURCorner = '┐'
+	RuneVLine    = '│'
+)
+
+// RuneFallbacks is the default map of fallback strings that will be
+// used to replace a rune when no other more appropriate transformation
+// is available, and the rune cannot be displayed directly.
+//
+// New entries may be added to this map over time, as it becomes clear
+// that such is desirable.  Characters that represent either letters or
+// numbers should not be added to this list unless it is certain that
+// the meaning will still convey unambiguously.
+//
+// As an example, it would be appropriate to add an ASCII mapping for
+// the full width form of the letter 'A', but it would not be appropriate
+// to do so a glyph representing the country China.
+//
+// Programs that desire richer fallbacks may register additional ones,
+// or change or even remove these mappings with Screen.RegisterRuneFallback
+// Screen.UnregisterRuneFallback methods.
+//
+// Note that Unicode is presumed to be able to display all glyphs.
+// This is a pretty poor assumption, but there is no easy way to
+// figure out which glyphs are supported in a given font.  Hence,
+// some care in selecting the characters you support in your application
+// is still appropriate.
+var RuneFallbacks = map[rune]string{
+	RuneSterling: "f",
+	RuneDArrow:   "v",
+	RuneLArrow:   "<",
+	RuneRArrow:   ">",
+	RuneUArrow:   "^",
+	RuneBullet:   "o",
+	RuneBoard:    "#",
+	RuneCkBoard:  ":",
+	RuneDegree:   "\\",
+	RuneDiamond:  "+",
+	RuneGEqual:   ">",
+	RunePi:       "*",
+	RuneHLine:    "-",
+	RuneLantern:  "#",
+	RunePlus:     "+",
+	RuneLEqual:   "<",
+	RuneLLCorner: "+",
+	RuneLRCorner: "+",
+	RuneNEqual:   "!",
+	RunePlMinus:  "#",
+	RuneS1:       "~",
+	RuneS3:       "-",
+	RuneS7:       "-",
+	RuneS9:       "_",
+	RuneBlock:    "#",
+	RuneTTee:     "+",
+	RuneRTee:     "+",
+	RuneLTee:     "+",
+	RuneBTee:     "+",
+	RuneULCorner: "+",
+	RuneURCorner: "+",
+	RuneVLine:    "|",
+}