fix(vault): centralize enrich skip filter and fix stop cancel bug

Extract shouldSkipEnrichment() replacing 4 scattered goclaw_gen_ checks.
Filter also skips UUID, hex hash, digit-only, short, and known junk filenames.
Fix cancelFuncs never being populated — Stop() was a no-op leaving UI stuck.

internal/vault/enrich_classify.go

@@ -6,7 +6,6 @@ import (
 	"log/slog"
 	"maps"
 	"slices"
-	"strings"
 
 	"github.com/nextlevelbuilder/goclaw/internal/providers"
 	"github.com/nextlevelbuilder/goclaw/internal/store"
@@ -154,8 +153,8 @@ func (w *EnrichWorker) gatherCandidates(ctx context.Context, tenantID, _ string,
 			if n.Score < enrichSimilarityMin || n.Document.Summary == "" {
 				continue
 			}
-			// Skip auto-generated media files as link targets — they create noise.
-			if strings.HasPrefix(n.Document.PathBasename, "goclaw_gen_") {
+			// Skip meaningless filenames as link targets — they create noise.
+			if shouldSkipEnrichment(n.Document.PathBasename) {
 				continue
 			}
 			// Bidirectional dedup: only process each pair once.

internal/vault/enrich_skip_filter.go

@@ -0,0 +1,49 @@
+package vault
+
+import (
+	"log/slog"
+	"regexp"
+	"strings"
+)
+
+// Compiled patterns for meaningless filenames that should skip enrichment.
+var (
+	reDigitsOnly = regexp.MustCompile(`^[0-9]+$`)
+	reUUID       = regexp.MustCompile(`(?i)^[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}$`)
+	reHexHash    = regexp.MustCompile(`(?i)^[0-9a-f]{8,}$`)
+	reMixedJunk  = regexp.MustCompile(`(?i)^(img|tmp|temp|dsc|screenshot|untitled|file|pic|photo|vid|clip|scan|page)[_-][0-9]+$`)
+)
+
+// shouldSkipEnrichment returns true if the basename indicates a file that
+// would produce noise during enrichment (auto-generated, hash-named, etc.).
+// Checks are applied to the stem (basename without extension).
+// Unicode/CJK filenames pass through — they carry semantic meaning.
+func shouldSkipEnrichment(basename string) bool {
+	// Strip extension to get stem.
+	stem := basename
+	if idx := strings.LastIndex(basename, "."); idx > 0 {
+		stem = basename[:idx]
+	}
+
+	switch {
+	case strings.HasPrefix(stem, "goclaw_gen_"):
+		slog.Debug("vault.enrich: skip_generated", "file", basename)
+		return true
+	case len(stem) < 3:
+		slog.Debug("vault.enrich: skip_short", "file", basename)
+		return true
+	case reDigitsOnly.MatchString(stem):
+		slog.Debug("vault.enrich: skip_digits", "file", basename)
+		return true
+	case reUUID.MatchString(stem):
+		slog.Debug("vault.enrich: skip_uuid", "file", basename)
+		return true
+	case reHexHash.MatchString(stem):
+		slog.Debug("vault.enrich: skip_hex_hash", "file", basename)
+		return true
+	case reMixedJunk.MatchString(stem):
+		slog.Debug("vault.enrich: skip_mixed_junk", "file", basename)
+		return true
+	}
+	return false
+}

internal/vault/enrich_worker.go

@@ -99,18 +99,20 @@ func (w *EnrichWorker) resolveProviderForTenant(ctx context.Context, tenantID st
 // Stop cancels in-flight enrichment for the given tenant.
 // Safe to call even if no enrichment is running.
 func (w *EnrichWorker) Stop(tenantID string) {
-	if cancel, ok := w.cancelFuncs.Load(tenantID); ok {
+	if cancel, ok := w.cancelFuncs.LoadAndDelete(tenantID); ok {
 		cancel.(context.CancelFunc)()
-		w.cancelFuncs.Delete(tenantID)
-		w.progress.Finish()
-		slog.Info("vault.enrich: stopped by user", "tenant", tenantID)
 	}
+	// Always finish progress — ensures UI resets even if cancelFuncs was empty.
+	w.progress.Finish()
+	slog.Info("vault.enrich: stopped by user", "tenant", tenantID)
 }
 
 // IsRunning returns true if enrichment is in progress for the tenant.
 func (w *EnrichWorker) IsRunning(tenantID string) bool {
-	_, ok := w.cancelFuncs.Load(tenantID)
-	return ok
+	if _, ok := w.cancelFuncs.Load(tenantID); ok {
+		return true
+	}
+	return w.progress.Status().Running
 }
 
 // EnqueueUnenriched fetches documents with empty summary and emits enrichment events.
@@ -127,8 +129,8 @@ func (w *EnrichWorker) EnqueueUnenriched(ctx context.Context, tenantID, workspac
 
 	count := 0
 	for _, doc := range docs {
-		// Skip auto-generated media files — they create noise links.
-		if strings.HasPrefix(filepath.Base(doc.Path), "goclaw_gen_") {
+		// Skip meaningless filenames — they create noise links.
+		if shouldSkipEnrichment(filepath.Base(doc.Path)) {
 			continue
 		}
 		agentID := ""
@@ -178,10 +180,8 @@ func (w *EnrichWorker) Handle(ctx context.Context, event eventbus.DomainEvent) e
 		return nil
 	}
 
-	// Skip auto-generated media files (goclaw_gen_*) — they create excessive
-	// noise links due to similar embeddings. These are typically image outputs
-	// that don't benefit from semantic linking.
-	if basename := filepath.Base(payload.Path); strings.HasPrefix(basename, "goclaw_gen_") {
+	// Skip meaningless filenames — they create noise links.
+	if shouldSkipEnrichment(filepath.Base(payload.Path)) {
 		return nil
 	}
 
@@ -201,7 +201,12 @@ func (w *EnrichWorker) Handle(ctx context.Context, event eventbus.DomainEvent) e
 		return nil // another goroutine already processing this agent's queue
 	}
 
-	w.processBatch(ctx, key)
+	// Create per-tenant cancel context for stop capability.
+	cancelCtx, cancel := context.WithCancel(ctx)
+	w.cancelFuncs.Store(payload.TenantID, cancel)
+	w.processBatch(cancelCtx, key)
+	// Clean up after batch completes naturally.
+	w.cancelFuncs.Delete(payload.TenantID)
 	return nil
 }
 
@@ -217,6 +222,10 @@ type enriched struct {
 // overwhelm the LLM provider with hundreds of concurrent requests.
 func (w *EnrichWorker) processBatch(ctx context.Context, key string) {
 	for {
+		if ctx.Err() != nil {
+			w.queue.TryFinish(key)
+			return
+		}
 		items := w.queue.Drain(key)
 		if len(items) == 0 {
 			if w.queue.TryFinish(key) {

internal/vault/rescan.go

@@ -117,7 +117,7 @@ func RescanWorkspace(ctx context.Context, params RescanParams, vs store.VaultSto
 		// can call progress.Start(total) before workers receive events.
 		// Skip auto-generated media files (goclaw_gen_*) — they create excessive
 		// noise links and shouldn't be counted in progress tracking.
-		if bus != nil && !strings.HasPrefix(filepath.Base(relPath), "goclaw_gen_") {
+		if bus != nil && !shouldSkipEnrichment(filepath.Base(relPath)) {
 			result.PendingEvents = append(result.PendingEvents, eventbus.DomainEvent{
 				ID:        uuid.Must(uuid.NewV7()).String(),
 				Type:      eventbus.EventVaultDocUpserted,