feat(onboard): add interactive extra maps configuration step

cmd/vecna/onboard.go

@@ -34,7 +34,7 @@ func runOnboard(_ *cobra.Command, _ []string) error {
 
 	// ── Step 1: Discover ──────────────────────────────────────────────────────
 
-	step(1, 5, "Discover embedding servers")
+	step(1, 6, "Discover embedding servers")
 
 	fmt.Println("Scanning (Ollama, LM Studio, vLLM, LocalAI, Jan, Kobold, Tabby)...")
 	servers := discovery.Scan(context.Background())
@@ -89,7 +89,7 @@ func runOnboard(_ *cobra.Command, _ []string) error {
 
 	// ── Step 2: Detect dimensions ─────────────────────────────────────────────
 
-	step(2, 5, "Detect model dimensions")
+	step(2, 6, "Detect model dimensions")
 
 	for i := range targets {
 		fmt.Printf("Probing %s / %s ... ", targets[i].endpoint, targets[i].model)
@@ -106,7 +106,7 @@ func runOnboard(_ *cobra.Command, _ []string) error {
 
 	// ── Step 3: Configure adapter ─────────────────────────────────────────────
 
-	step(3, 5, "Configure dimension adapter")
+	step(3, 6, "Configure dimension adapter")
 
 	// Use the first target's detected dim as the source dimension default
 	firstDim := 0
@@ -156,7 +156,7 @@ func runOnboard(_ *cobra.Command, _ []string) error {
 
 	// ── Step 4: Configure vecna server ────────────────────────────────────────
 
-	step(4, 5, "Configure vecna server")
+	step(4, 6, "Configure vecna server")
 
 	portRaw, err := promptString(in, "Bind port [8080]: ", "8080")
 	if err != nil {
@@ -189,9 +189,44 @@ func runOnboard(_ *cobra.Command, _ []string) error {
 	}
 	fmt.Println()
 
-	// ── Step 5: Test & write ──────────────────────────────────────────────────
+	// ── Step 5: Extra maps ────────────────────────────────────────────────────
 
-	step(5, 5, "Test connections and write config")
+	step(5, 6, "Configure extra maps (optional)")
+
+	extraMaps := map[string]config.ExtraMapConfig{}
+
+	addMaps, err := promptBool(in, "Add extra dimension maps (/map/{key}/v1/embeddings)?", false)
+	if err != nil {
+		return err
+	}
+	if addMaps {
+		// Build the list of target names from the already-collected targets.
+		targetNames := make([]string, 0, len(targets))
+		for _, t := range targets {
+			targetNames = append(targetNames, t.name)
+		}
+
+		for {
+			mc, mapErr := collectExtraMap(in, sourceDim, targetDim, adapterType, truncateMode, padMode, targetNames)
+			if mapErr != nil {
+				return mapErr
+			}
+			extraMaps[mc.key] = mc.cfg
+
+			another, promptErr := promptBool(in, "Add another extra map?", false)
+			if promptErr != nil {
+				return promptErr
+			}
+			if !another {
+				break
+			}
+		}
+	}
+	fmt.Println()
+
+	// ── Step 6: Test & write ──────────────────────────────────────────────────
+
+	step(6, 6, "Test connections and write config")
 
 	allPassed := true
 	for _, t := range targets {
@@ -260,6 +295,7 @@ func runOnboard(_ *cobra.Command, _ []string) error {
 			TruncateMode: truncateMode,
 			PadMode:      padMode,
 		},
+		ExtraMaps: extraMaps,
 	}
 
 	defaultCfgPath := config.ResolveFile(cfgFile)
@@ -467,6 +503,103 @@ func mustParseInt(s string, fallback int) int {
 	return n
 }
 
+// pendingExtraMap pairs the map key with its collected config.
+type pendingExtraMap struct {
+	key string
+	cfg config.ExtraMapConfig
+}
+
+// collectExtraMap interactively collects one extra_map entry.
+// Global adapter values are shown as defaults; the user may override any field.
+func collectExtraMap(
+	in *bufio.Reader,
+	globalSourceDim, globalTargetDim int,
+	globalAdapterType, globalTruncateMode, globalPadMode string,
+	targetNames []string,
+) (pendingExtraMap, error) {
+	key, err := promptString(in, "Map key (used in URL path, e.g. \"512\"): ", "")
+	if err != nil || key == "" {
+		return pendingExtraMap{}, fmt.Errorf("map key is required")
+	}
+
+	mc := config.ExtraMapConfig{}
+
+	// Target dimension (required — always shown)
+	targetDimRaw, err := promptString(in,
+		fmt.Sprintf("Target dimension [%d]: ", globalTargetDim), fmt.Sprintf("%d", globalTargetDim))
+	if err != nil {
+		return pendingExtraMap{}, err
+	}
+	mc.TargetDim = mustParseInt(targetDimRaw, globalTargetDim)
+
+	// Forward target override
+	if len(targetNames) > 0 {
+		fmt.Println("Available forward targets: " + strings.Join(targetNames, ", "))
+		ftRaw, err := promptString(in, "Forward target override (leave empty to use global default): ", "")
+		if err != nil {
+			return pendingExtraMap{}, err
+		}
+		mc.ForwardTarget = strings.TrimSpace(ftRaw)
+	}
+
+	// Adapter type override
+	adapterTypeRaw, err := promptString(in,
+		fmt.Sprintf("Adapter type override (truncate/random/projection) [%s]: ", globalAdapterType), globalAdapterType)
+	if err != nil {
+		return pendingExtraMap{}, err
+	}
+	if adapterTypeRaw != globalAdapterType {
+		mc.Type = adapterTypeRaw
+	}
+	effectiveType := coalesce(mc.Type, globalAdapterType)
+
+	// Source dim override
+	sourceDimRaw, err := promptString(in,
+		fmt.Sprintf("Source dimension override (leave empty to use global %d): ", globalSourceDim), "")
+	if err != nil {
+		return pendingExtraMap{}, err
+	}
+	if sourceDimRaw != "" {
+		mc.SourceDim = mustParseInt(sourceDimRaw, globalSourceDim)
+	}
+
+	// Truncate/pad mode overrides — only for truncate type
+	if effectiveType == "truncate" {
+		tmRaw, err := promptString(in,
+			fmt.Sprintf("Truncate mode override (from_end/from_start) [%s]: ", globalTruncateMode), globalTruncateMode)
+		if err != nil {
+			return pendingExtraMap{}, err
+		}
+		if tmRaw != globalTruncateMode {
+			mc.TruncateMode = tmRaw
+		}
+
+		pmRaw, err := promptString(in,
+			fmt.Sprintf("Pad mode override (at_end/at_start) [%s]: ", globalPadMode), globalPadMode)
+		if err != nil {
+			return pendingExtraMap{}, err
+		}
+		if pmRaw != globalPadMode {
+			mc.PadMode = pmRaw
+		}
+	}
+
+	// Seed — only for random type
+	if effectiveType == "random" {
+		seedRaw, err := promptString(in, "Seed (0 = time-based): ", "0")
+		if err != nil {
+			return pendingExtraMap{}, err
+		}
+		var seed int64
+		if _, err := fmt.Sscanf(seedRaw, "%d", &seed); err != nil {
+			seed = 0
+		}
+		mc.Seed = seed
+	}
+
+	return pendingExtraMap{key: key, cfg: mc}, nil
+}
+
 func writeFullConfig(path string, cfg config.Config) error {
 	// If file already exists, preserve any targets not touched by onboard
 	// by using SaveTarget for each new target; otherwise write the whole file.