feat(brain): add brain_ingest, brain_search tools and extend search to wiki/

ingestion/internal/search/search.go

@@ -33,46 +33,52 @@ func Query(brainDir, query string, limit int) ([]Result, error) {
 
 	var results []Result
 
-	err := filepath.WalkDir(filepath.Join(brainDir, "knowledge"), func(path string, d os.DirEntry, err error) error {
-		if err != nil {
-			slog.Warn("search: skipping path", "path", path, "err", err)
-			return nil
-		}
-		if d.IsDir() || !strings.HasSuffix(path, ".md") {
-			return nil
+	for _, subdir := range []string{"knowledge", "wiki"} {
+		dir := filepath.Join(brainDir, subdir)
+		if _, statErr := os.Stat(dir); os.IsNotExist(statErr) {
+			continue
 		}
+		err := filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error {
+			if err != nil {
+				slog.Warn("search: skipping path", "path", path, "err", err)
+				return nil
+			}
+			if d.IsDir() || !strings.HasSuffix(path, ".md") {
+				return nil
+			}
 
-		content, err := os.ReadFile(path)
-		if err != nil {
-			slog.Warn("search: skipping unreadable file", "path", path, "err", err)
+			content, err := os.ReadFile(path)
+			if err != nil {
+				slog.Warn("search: skipping unreadable file", "path", path, "err", err)
+				return nil
+			}
+
+			lower := strings.ToLower(string(content))
+			score := 0
+			for _, term := range terms {
+				score += strings.Count(lower, term)
+			}
+			if score == 0 {
+				return nil
+			}
+
+			rel, err := filepath.Rel(brainDir, path)
+			if err != nil {
+				return fmt.Errorf("rel path: %w", err)
+			}
+			rel = filepath.ToSlash(rel)
+
+			results = append(results, Result{
+				Path:    rel,
+				Title:   extractTitle(string(content), d.Name()),
+				Excerpt: excerpt(string(content), 300),
+				Score:   score,
+			})
 			return nil
-		}
-
-		lower := strings.ToLower(string(content))
-		score := 0
-		for _, term := range terms {
-			score += strings.Count(lower, term)
-		}
-		if score == 0 {
-			return nil
-		}
-
-		rel, err := filepath.Rel(brainDir, path)
-		if err != nil {
-			return fmt.Errorf("rel path: %w", err)
-		}
-		rel = filepath.ToSlash(rel)
-
-		results = append(results, Result{
-			Path:    rel,
-			Title:   extractTitle(string(content), d.Name()),
-			Excerpt: excerpt(string(content), 300),
-			Score:   score,
 		})
-		return nil
-	})
-	if err != nil {
-		return nil, err
+		if err != nil {
+			return nil, err
+		}
 	}
 
 	sort.Slice(results, func(i, j int) bool {