feat(tools): link thoughts and learnings

.gitignore

@@ -36,3 +36,4 @@ ui/.svelte-kit/
 internal/app/ui/dist/*
 !internal/app/ui/dist/placeholder.txt
 .codex
+.worktrees/

internal/app/app.go

@@ -194,28 +194,29 @@ func routes(logger *slog.Logger, cfg *config.Config, info buildinfo.Info, db *st
 	adminActions := newAdminActions(backfillTool, enrichmentRetryer, logger)
 
 	toolSet := mcpserver.ToolSet{
-		Capture:         tools.NewCaptureTool(db, embeddings, cfg.Capture, activeProjects, enrichmentRetryer, backfillTool),
-		Search:          tools.NewSearchTool(db, embeddings, cfg.Search, activeProjects),
-		List:            tools.NewListTool(db, cfg.Search, activeProjects),
-		Stats:           tools.NewStatsTool(db),
-		Get:             tools.NewGetTool(db),
-		Update:          tools.NewUpdateTool(db, embeddings, metadata, cfg.Capture, logger),
-		Delete:          tools.NewDeleteTool(db),
-		Archive:         tools.NewArchiveTool(db),
-		Projects:        tools.NewProjectsTool(db, activeProjects),
-		Version:         tools.NewVersionTool(cfg.MCP.ServerName, info),
-		Learnings:       tools.NewLearningsTool(db, activeProjects, cfg.Search),
-		Plans:           tools.NewPlansTool(db, activeProjects, cfg.Search),
-		ProjectPersonas: tools.NewProjectPersonasTool(db, activeProjects),
-		WorldModel:      tools.NewWorldModelTool(db, activeProjects),
-		Context:         tools.NewContextTool(db, embeddings, cfg.Search, activeProjects),
-		Recall:          tools.NewRecallTool(db, embeddings, cfg.Search, activeProjects),
-		Summarize:       tools.NewSummarizeTool(db, embeddings, metadata, cfg.Search, activeProjects),
-		Links:           tools.NewLinksTool(db, embeddings, cfg.Search),
-		Files:           filesTool,
-		Backfill:        backfillTool,
-		Reparse:         tools.NewReparseMetadataTool(db, bgMetadata, cfg.Capture, activeProjects, logger),
-		RetryMetadata:   tools.NewRetryEnrichmentTool(enrichmentRetryer),
+		Capture:              tools.NewCaptureTool(db, embeddings, cfg.Capture, activeProjects, enrichmentRetryer, backfillTool),
+		Search:               tools.NewSearchTool(db, embeddings, cfg.Search, activeProjects),
+		List:                 tools.NewListTool(db, cfg.Search, activeProjects),
+		Stats:                tools.NewStatsTool(db),
+		Get:                  tools.NewGetTool(db),
+		Update:               tools.NewUpdateTool(db, embeddings, metadata, cfg.Capture, logger),
+		Delete:               tools.NewDeleteTool(db),
+		Archive:              tools.NewArchiveTool(db),
+		Projects:             tools.NewProjectsTool(db, activeProjects),
+		Version:              tools.NewVersionTool(cfg.MCP.ServerName, info),
+		Learnings:            tools.NewLearningsTool(db, activeProjects, cfg.Search),
+		Plans:                tools.NewPlansTool(db, activeProjects, cfg.Search),
+		ProjectPersonas:      tools.NewProjectPersonasTool(db, activeProjects),
+		WorldModel:           tools.NewWorldModelTool(db, activeProjects),
+		ThoughtLearningLinks: tools.NewThoughtLearningLinksTool(db),
+		Context:              tools.NewContextTool(db, embeddings, cfg.Search, activeProjects),
+		Recall:               tools.NewRecallTool(db, embeddings, cfg.Search, activeProjects),
+		Summarize:            tools.NewSummarizeTool(db, embeddings, metadata, cfg.Search, activeProjects),
+		Links:                tools.NewLinksTool(db, embeddings, cfg.Search),
+		Files:                filesTool,
+		Backfill:             backfillTool,
+		Reparse:              tools.NewReparseMetadataTool(db, bgMetadata, cfg.Capture, activeProjects, logger),
+		RetryMetadata:        tools.NewRetryEnrichmentTool(enrichmentRetryer),
 		//Maintenance:   tools.NewMaintenanceTool(db),
 		Skills:      tools.NewSkillsTool(db, activeProjects),
 		Personas:    tools.NewAgentPersonasTool(db),

internal/mcpserver/server.go

@@ -38,14 +38,15 @@ type ToolSet struct {
 	Reparse       *tools.ReparseMetadataTool
 	RetryMetadata *tools.RetryEnrichmentTool
 	//Maintenance   *tools.MaintenanceTool
-	Skills          *tools.SkillsTool
-	Personas        *tools.AgentPersonasTool
-	ChatHistory     *tools.ChatHistoryTool
-	Describe        *tools.DescribeTool
-	Learnings       *tools.LearningsTool
-	Plans           *tools.PlansTool
-	ProjectPersonas *tools.ProjectPersonasTool
-	WorldModel      *tools.WorldModelTool
+	Skills               *tools.SkillsTool
+	Personas             *tools.AgentPersonasTool
+	ChatHistory          *tools.ChatHistoryTool
+	Describe             *tools.DescribeTool
+	Learnings            *tools.LearningsTool
+	Plans                *tools.PlansTool
+	ProjectPersonas      *tools.ProjectPersonasTool
+	WorldModel           *tools.WorldModelTool
+	ThoughtLearningLinks *tools.ThoughtLearningLinksTool
 }
 
 // Handlers groups the HTTP handlers produced for an MCP server instance.
@@ -91,6 +92,7 @@ func NewHandlers(cfg config.MCPConfig, logger *slog.Logger, toolSet ToolSet, onS
 		registerProjectTools,
 		registerWorldModelTools,
 		registerLearningTools,
+		registerThoughtLearningLinkTools,
 		registerPlanTools,
 		registerFileTools,
 		registerMaintenanceTools,
@@ -308,6 +310,34 @@ func registerLearningTools(server *mcp.Server, logger *slog.Logger, toolSet Tool
 	return nil
 }
 
+func registerThoughtLearningLinkTools(server *mcp.Server, logger *slog.Logger, toolSet ToolSet) error {
+	if err := addTool(server, logger, &mcp.Tool{
+		Name:        "link_thought_learning",
+		Description: "Create or update an explicit association between a raw thought and a curated learning.",
+	}, toolSet.ThoughtLearningLinks.Link); err != nil {
+		return err
+	}
+	if err := addTool(server, logger, &mcp.Tool{
+		Name:        "unlink_thought_learning",
+		Description: "Remove an explicit association between a thought and a learning.",
+	}, toolSet.ThoughtLearningLinks.Unlink); err != nil {
+		return err
+	}
+	if err := addTool(server, logger, &mcp.Tool{
+		Name:        "get_thought_learnings",
+		Description: "List curated learnings explicitly linked to a thought.",
+	}, toolSet.ThoughtLearningLinks.GetThoughtLearnings); err != nil {
+		return err
+	}
+	if err := addTool(server, logger, &mcp.Tool{
+		Name:        "get_learning_thoughts",
+		Description: "List raw thoughts explicitly linked to a learning.",
+	}, toolSet.ThoughtLearningLinks.GetLearningThoughts); err != nil {
+		return err
+	}
+	return nil
+}
+
 func registerPlanTools(server *mcp.Server, logger *slog.Logger, toolSet ToolSet) error {
 	if err := addTool(server, logger, &mcp.Tool{
 		Name:        "create_plan",
@@ -755,6 +785,10 @@ func BuildToolCatalog() []tools.ToolEntry {
 		{Name: "add_learning", Description: "Create a curated learning record distinct from raw thoughts.", Category: "projects"},
 		{Name: "get_learning", Description: "Retrieve a structured learning by id.", Category: "projects"},
 		{Name: "list_learnings", Description: "List structured learnings with optional project, category, area, status, priority, tag, and text filters.", Category: "projects"},
+		{Name: "link_thought_learning", Description: "Create or update a lightweight explicit association between a raw thought and a curated learning.", Category: "projects"},
+		{Name: "unlink_thought_learning", Description: "Remove a lightweight explicit association between a thought and a learning.", Category: "projects"},
+		{Name: "get_thought_learnings", Description: "List curated learnings explicitly associated with a thought.", Category: "projects"},
+		{Name: "get_learning_thoughts", Description: "List raw source thoughts explicitly associated with a learning.", Category: "projects"},
 
 		// plans
 		{Name: "create_plan", Description: "Create a structured plan with status, priority, owner, due date, and optional project link.", Category: "plans"},

internal/mcpserver/streamable_integration_test.go

@@ -189,30 +189,31 @@ func TestStreamableHTTPReturnsStructuredToolErrors(t *testing.T) {
 
 func streamableTestToolSet() ToolSet {
 	return ToolSet{
-		Version:         tools.NewVersionTool("test", buildinfo.Info{Version: "0.0.1", TagName: "v0.0.1", Commit: "test", BuildDate: "2026-03-31T00:00:00Z"}),
-		Capture:         new(tools.CaptureTool),
-		Search:          new(tools.SearchTool),
-		List:            new(tools.ListTool),
-		Stats:           new(tools.StatsTool),
-		Get:             new(tools.GetTool),
-		Update:          new(tools.UpdateTool),
-		Delete:          new(tools.DeleteTool),
-		Archive:         new(tools.ArchiveTool),
-		Projects:        new(tools.ProjectsTool),
-		Context:         new(tools.ContextTool),
-		Recall:          new(tools.RecallTool),
-		Summarize:       new(tools.SummarizeTool),
-		Links:           new(tools.LinksTool),
-		Files:           new(tools.FilesTool),
-		Backfill:        new(tools.BackfillTool),
-		Reparse:         new(tools.ReparseMetadataTool),
-		RetryMetadata:   new(tools.RetryEnrichmentTool),
-		Skills:          new(tools.SkillsTool),
-		ChatHistory:     new(tools.ChatHistoryTool),
-		Describe:        new(tools.DescribeTool),
-		Learnings:       new(tools.LearningsTool),
-		Plans:           new(tools.PlansTool),
-		ProjectPersonas: new(tools.ProjectPersonasTool),
-		WorldModel:      new(tools.WorldModelTool),
+		Version:              tools.NewVersionTool("test", buildinfo.Info{Version: "0.0.1", TagName: "v0.0.1", Commit: "test", BuildDate: "2026-03-31T00:00:00Z"}),
+		Capture:              new(tools.CaptureTool),
+		Search:               new(tools.SearchTool),
+		List:                 new(tools.ListTool),
+		Stats:                new(tools.StatsTool),
+		Get:                  new(tools.GetTool),
+		Update:               new(tools.UpdateTool),
+		Delete:               new(tools.DeleteTool),
+		Archive:              new(tools.ArchiveTool),
+		Projects:             new(tools.ProjectsTool),
+		Context:              new(tools.ContextTool),
+		Recall:               new(tools.RecallTool),
+		Summarize:            new(tools.SummarizeTool),
+		Links:                new(tools.LinksTool),
+		Files:                new(tools.FilesTool),
+		Backfill:             new(tools.BackfillTool),
+		Reparse:              new(tools.ReparseMetadataTool),
+		RetryMetadata:        new(tools.RetryEnrichmentTool),
+		Skills:               new(tools.SkillsTool),
+		ChatHistory:          new(tools.ChatHistoryTool),
+		Describe:             new(tools.DescribeTool),
+		Learnings:            new(tools.LearningsTool),
+		Plans:                new(tools.PlansTool),
+		ProjectPersonas:      new(tools.ProjectPersonasTool),
+		WorldModel:           new(tools.WorldModelTool),
+		ThoughtLearningLinks: new(tools.ThoughtLearningLinksTool),
 	}
 }

internal/store/thought_learning_links.go

@@ -0,0 +1,148 @@
+package store
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/google/uuid"
+
+	"git.warky.dev/wdevs/amcs/internal/generatedmodels"
+	thoughttypes "git.warky.dev/wdevs/amcs/internal/types"
+)
+
+// LinkThoughtLearning creates or updates an association between a thought (by GUID) and a learning (by numeric ID).
+// If the pair already exists, the relation label is updated.
+func (db *DB) LinkThoughtLearning(ctx context.Context, thoughtGUID uuid.UUID, learningID int64, relation string) error {
+	_, err := db.pool.Exec(ctx, `
+		insert into thought_learning_links (thought_id, learning_id, relation)
+		select t.id, $2, $3
+		from thoughts t
+		where t.guid = $1
+		on conflict (thought_id, learning_id) do update set relation = excluded.relation
+	`, thoughtGUID, learningID, relation)
+	if err != nil {
+		return fmt.Errorf("link thought learning: %w", err)
+	}
+	return nil
+}
+
+// UnlinkThoughtLearning removes the association between a thought (by GUID) and a learning (by numeric ID).
+func (db *DB) UnlinkThoughtLearning(ctx context.Context, thoughtGUID uuid.UUID, learningID int64) error {
+	_, err := db.pool.Exec(ctx, `
+		delete from thought_learning_links
+		where thought_id = (select id from thoughts where guid = $1)
+		  and learning_id = $2
+	`, thoughtGUID, learningID)
+	if err != nil {
+		return fmt.Errorf("unlink thought learning: %w", err)
+	}
+	return nil
+}
+
+// GetLinkedLearnings returns all learnings explicitly associated with a thought (by GUID).
+func (db *DB) GetLinkedLearnings(ctx context.Context, thoughtGUID uuid.UUID) ([]thoughttypes.LinkedLearning, error) {
+	rows, err := db.pool.Query(ctx, `
+		select l.id, l.guid, l.summary, l.details, l.category, l.area, l.status, l.priority, l.confidence,
+		       l.action_required, l.source_type, l.source_ref, l.project_id, l.related_thought_id,
+		       l.related_skill_id, l.reviewed_by, l.reviewed_at, l.duplicate_of_learning_id,
+		       l.supersedes_learning_id, l.tags::text[], l.created_at, l.updated_at,
+		       tll.relation, tll.created_at as linked_at
+		from thought_learning_links tll
+		join learnings l on l.id = tll.learning_id
+		where tll.thought_id = (select id from thoughts where guid = $1)
+		order by tll.created_at desc
+	`, thoughtGUID)
+	if err != nil {
+		return nil, fmt.Errorf("query linked learnings: %w", err)
+	}
+	defer rows.Close()
+
+	items := make([]thoughttypes.LinkedLearning, 0)
+	for rows.Next() {
+		var tags []string
+		var linked thoughttypes.LinkedLearning
+		var m generatedmodels.ModelPublicLearnings
+
+		if err := rows.Scan(
+			&m.ID,
+			&m.GUID,
+			&m.Summary,
+			&m.Details,
+			&m.Category,
+			&m.Area,
+			&m.Status,
+			&m.Priority,
+			&m.Confidence,
+			&m.ActionRequired,
+			&m.SourceType,
+			&m.SourceRef,
+			&m.ProjectID,
+			&m.RelatedThoughtID,
+			&m.RelatedSkillID,
+			&m.ReviewedBy,
+			&m.ReviewedAt,
+			&m.DuplicateOfLearningID,
+			&m.SupersedesLearningID,
+			&tags,
+			&m.CreatedAt,
+			&m.UpdatedAt,
+			&linked.Relation,
+			&linked.CreatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scan linked learning: %w", err)
+		}
+		linked.Learning = learningFromModel(m, tags)
+		items = append(items, linked)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterate linked learnings: %w", err)
+	}
+	return items, nil
+}
+
+// GetLinkedThoughtsForLearning returns all thoughts explicitly associated with a learning (by numeric ID).
+func (db *DB) GetLinkedThoughtsForLearning(ctx context.Context, learningID int64) ([]thoughttypes.LinkedLearningThought, error) {
+	rows, err := db.pool.Query(ctx, `
+		select t.id, t.guid, t.content, t.metadata, t.project_id, t.archived_at, t.created_at, t.updated_at,
+		       tll.relation, tll.created_at as linked_at
+		from thought_learning_links tll
+		join thoughts t on t.id = tll.thought_id
+		where tll.learning_id = $1
+		order by tll.created_at desc
+	`, learningID)
+	if err != nil {
+		return nil, fmt.Errorf("query linked thoughts for learning: %w", err)
+	}
+	defer rows.Close()
+
+	items := make([]thoughttypes.LinkedLearningThought, 0)
+	for rows.Next() {
+		var linked thoughttypes.LinkedLearningThought
+		var m generatedmodels.ModelPublicThoughts
+
+		if err := rows.Scan(
+			&m.ID,
+			&m.GUID,
+			&m.Content,
+			&m.Metadata,
+			&m.ProjectID,
+			&m.ArchivedAt,
+			&m.CreatedAt,
+			&m.UpdatedAt,
+			&linked.Relation,
+			&linked.CreatedAt,
+		); err != nil {
+			return nil, fmt.Errorf("scan linked thought for learning: %w", err)
+		}
+		thought, err := thoughtFromModel(m)
+		if err != nil {
+			return nil, fmt.Errorf("map linked thought for learning: %w", err)
+		}
+		linked.Thought = thought
+		items = append(items, linked)
+	}
+	if err := rows.Err(); err != nil {
+		return nil, fmt.Errorf("iterate linked thoughts for learning: %w", err)
+	}
+	return items, nil
+}

internal/tools/thought_learning_links.go

@@ -0,0 +1,152 @@
+package tools
+
+import (
+	"context"
+	"strconv"
+	"strings"
+
+	"github.com/modelcontextprotocol/go-sdk/mcp"
+
+	"git.warky.dev/wdevs/amcs/internal/store"
+	thoughttypes "git.warky.dev/wdevs/amcs/internal/types"
+)
+
+type ThoughtLearningLinksTool struct {
+	store *store.DB
+}
+
+type LinkThoughtLearningInput struct {
+	ThoughtID  string `json:"thought_id" jsonschema:"UUID of the thought to link"`
+	LearningID int64  `json:"learning_id" jsonschema:"numeric id of the learning to link"`
+	Relation   string `json:"relation,omitempty" jsonschema:"relationship label, e.g. source, derived_from, related; defaults to source"`
+}
+
+type LinkThoughtLearningOutput struct {
+	Linked bool `json:"linked"`
+}
+
+type UnlinkThoughtLearningInput struct {
+	ThoughtID  string `json:"thought_id" jsonschema:"UUID of the thought"`
+	LearningID int64  `json:"learning_id" jsonschema:"numeric id of the learning"`
+}
+
+type UnlinkThoughtLearningOutput struct {
+	Unlinked bool `json:"unlinked"`
+}
+
+type GetThoughtLearningsInput struct {
+	ThoughtID string `json:"thought_id" jsonschema:"UUID of the thought"`
+}
+
+type GetThoughtLearningsOutput struct {
+	Learnings []thoughttypes.LinkedLearning `json:"learnings"`
+}
+
+type GetLearningThoughtsInput struct {
+	LearningID int64 `json:"learning_id" jsonschema:"numeric id of the learning"`
+}
+
+type GetLearningThoughtsOutput struct {
+	Thoughts []thoughttypes.LinkedLearningThought `json:"thoughts"`
+}
+
+func NewThoughtLearningLinksTool(db *store.DB) *ThoughtLearningLinksTool {
+	return &ThoughtLearningLinksTool{store: db}
+}
+
+func (t *ThoughtLearningLinksTool) Link(ctx context.Context, _ *mcp.CallToolRequest, in LinkThoughtLearningInput) (*mcp.CallToolResult, LinkThoughtLearningOutput, error) {
+	if err := t.ensureConfigured(); err != nil {
+		return nil, LinkThoughtLearningOutput{}, err
+	}
+
+	thoughtGUID, err := parseUUID(in.ThoughtID)
+	if err != nil {
+		return nil, LinkThoughtLearningOutput{}, err
+	}
+	if in.LearningID <= 0 {
+		return nil, LinkThoughtLearningOutput{}, errRequiredField("learning_id")
+	}
+	relation := strings.TrimSpace(in.Relation)
+	if relation == "" {
+		relation = "source"
+	}
+
+	if _, err := t.store.GetThought(ctx, thoughtGUID); err != nil {
+		return nil, LinkThoughtLearningOutput{}, errEntityNotFound("thought", "thought_id", in.ThoughtID)
+	}
+	if _, err := t.store.GetLearning(ctx, in.LearningID); err != nil {
+		return nil, LinkThoughtLearningOutput{}, errEntityNotFound("learning", "learning_id", strconv.FormatInt(in.LearningID, 10))
+	}
+
+	if err := t.store.LinkThoughtLearning(ctx, thoughtGUID, in.LearningID, relation); err != nil {
+		return nil, LinkThoughtLearningOutput{}, err
+	}
+	return nil, LinkThoughtLearningOutput{Linked: true}, nil
+}
+
+func (t *ThoughtLearningLinksTool) Unlink(ctx context.Context, _ *mcp.CallToolRequest, in UnlinkThoughtLearningInput) (*mcp.CallToolResult, UnlinkThoughtLearningOutput, error) {
+	if err := t.ensureConfigured(); err != nil {
+		return nil, UnlinkThoughtLearningOutput{}, err
+	}
+
+	thoughtGUID, err := parseUUID(in.ThoughtID)
+	if err != nil {
+		return nil, UnlinkThoughtLearningOutput{}, err
+	}
+	if in.LearningID <= 0 {
+		return nil, UnlinkThoughtLearningOutput{}, errRequiredField("learning_id")
+	}
+
+	if err := t.store.UnlinkThoughtLearning(ctx, thoughtGUID, in.LearningID); err != nil {
+		return nil, UnlinkThoughtLearningOutput{}, err
+	}
+	return nil, UnlinkThoughtLearningOutput{Unlinked: true}, nil
+}
+
+func (t *ThoughtLearningLinksTool) GetThoughtLearnings(ctx context.Context, _ *mcp.CallToolRequest, in GetThoughtLearningsInput) (*mcp.CallToolResult, GetThoughtLearningsOutput, error) {
+	if err := t.ensureConfigured(); err != nil {
+		return nil, GetThoughtLearningsOutput{}, err
+	}
+
+	thoughtGUID, err := parseUUID(in.ThoughtID)
+	if err != nil {
+		return nil, GetThoughtLearningsOutput{}, err
+	}
+
+	if _, err := t.store.GetThought(ctx, thoughtGUID); err != nil {
+		return nil, GetThoughtLearningsOutput{}, errEntityNotFound("thought", "thought_id", in.ThoughtID)
+	}
+
+	learnings, err := t.store.GetLinkedLearnings(ctx, thoughtGUID)
+	if err != nil {
+		return nil, GetThoughtLearningsOutput{}, err
+	}
+	return nil, GetThoughtLearningsOutput{Learnings: learnings}, nil
+}
+
+func (t *ThoughtLearningLinksTool) GetLearningThoughts(ctx context.Context, _ *mcp.CallToolRequest, in GetLearningThoughtsInput) (*mcp.CallToolResult, GetLearningThoughtsOutput, error) {
+	if err := t.ensureConfigured(); err != nil {
+		return nil, GetLearningThoughtsOutput{}, err
+	}
+
+	if in.LearningID <= 0 {
+		return nil, GetLearningThoughtsOutput{}, errRequiredField("learning_id")
+	}
+
+	if _, err := t.store.GetLearning(ctx, in.LearningID); err != nil {
+		return nil, GetLearningThoughtsOutput{}, errEntityNotFound("learning", "learning_id", strconv.FormatInt(in.LearningID, 10))
+	}
+
+	thoughts, err := t.store.GetLinkedThoughtsForLearning(ctx, in.LearningID)
+	if err != nil {
+		return nil, GetLearningThoughtsOutput{}, err
+	}
+	return nil, GetLearningThoughtsOutput{Thoughts: thoughts}, nil
+}
+
+func (t *ThoughtLearningLinksTool) ensureConfigured() error {
+	if t == nil || t.store == nil {
+		return errInvalidInput("thought learning links tool is not configured")
+	}
+	return nil
+}

internal/types/project.go

@@ -39,3 +39,22 @@ type LinkedThought struct {
 	Direction string    `json:"direction"`
 	CreatedAt time.Time `json:"created_at"`
 }
+
+type ThoughtLearningLink struct {
+	ThoughtID  int64     `json:"thought_id"`
+	LearningID int64     `json:"learning_id"`
+	Relation   string    `json:"relation"`
+	CreatedAt  time.Time `json:"created_at"`
+}
+
+type LinkedLearning struct {
+	Learning  Learning  `json:"learning"`
+	Relation  string    `json:"relation"`
+	CreatedAt time.Time `json:"created_at"`
+}
+
+type LinkedLearningThought struct {
+	Thought   Thought   `json:"thought"`
+	Relation  string    `json:"relation"`
+	CreatedAt time.Time `json:"created_at"`
+}

migrations/030_thought_learning_links.sql

@@ -0,0 +1,26 @@
+-- Many-to-many join table between thoughts and learnings.
+-- Allows a learning to reference multiple source thoughts and a thought to
+-- expose multiple related learnings, queryable in both directions.
+
+CREATE SEQUENCE IF NOT EXISTS public.identity_thought_learning_links_id
+  INCREMENT 1
+  MINVALUE 1
+  MAXVALUE 9223372036854775807
+  START 1
+  CACHE 1;
+
+CREATE TABLE IF NOT EXISTS public.thought_learning_links (
+  id bigint NOT NULL DEFAULT nextval('public.identity_thought_learning_links_id'),
+  thought_id bigint NOT NULL REFERENCES public.thoughts(id) ON DELETE CASCADE,
+  learning_id bigint NOT NULL REFERENCES public.learnings(id) ON DELETE CASCADE,
+  relation text NOT NULL DEFAULT 'source',
+  created_at timestamptz NOT NULL DEFAULT now(),
+  CONSTRAINT thought_learning_links_pkey PRIMARY KEY (id),
+  CONSTRAINT thought_learning_links_unique UNIQUE (thought_id, learning_id)
+);
+
+CREATE INDEX IF NOT EXISTS idx_thought_learning_links_thought_id
+  ON public.thought_learning_links (thought_id);
+
+CREATE INDEX IF NOT EXISTS idx_thought_learning_links_learning_id
+  ON public.thought_learning_links (learning_id);

schema/core.dbml

@@ -32,6 +32,20 @@ Table thought_links {
   }
 }
 
+Table thought_learning_links {
+  id bigserial [pk]
+  thought_id bigint [not null, ref: > thoughts.id]
+  learning_id bigint [not null, ref: > learnings.id]
+  relation text [not null, default: `'source'`]
+  created_at timestamptz [not null, default: `now()`]
+
+  indexes {
+    (thought_id, learning_id) [unique]
+    thought_id
+    learning_id
+  }
+}
+
 Table embeddings {
   id bigserial [pk]
   guid uuid [unique, not null, default: `gen_random_uuid()`]