fix: skip symlinks/irregular files in WalkFiles, exclude node_modules/paste-cache/image-cache, match .git in nested paths

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: FelixIsaac

internal/config/config.go

@@ -70,6 +70,9 @@ var DefaultExcludePatterns = []string{
 	"shell-snapshots",
 	"telemetry",
 	"sessionStorage",
+	"node_modules",
+	"paste-cache",
+	"image-cache",
 	// Files
 	"history.jsonl",
 	"stats-cache.json",
@@ -153,6 +156,10 @@ func (c *Config) ShouldExclude(relPath string) bool {
 			if relPathNorm == patternLower || strings.HasPrefix(relPathNorm, patternLower+"/") {
 				return true
 			}
+			// Match pattern as a path component anywhere in the path (e.g. .git in nested dirs)
+			if strings.Contains(relPathNorm, "/"+patternLower+"/") || strings.HasSuffix(relPathNorm, "/"+patternLower) {
+				return true
+			}
 			// Exact filename match
 			if strings.ToLower(filename) == patternLower {
 				return true

internal/sync/sync.go

@@ -37,14 +37,28 @@ func FileChecksum(path string) (string, error) {
 	return hex.EncodeToString(h.Sum(nil)), nil
 }
 
-// WalkFiles walks a directory and returns all file paths
+// WalkFiles walks a directory and returns all file paths, skipping symlinks and irregular files
 func WalkFiles(root string) ([]string, error) {
 	var files []string
 	err := filepath.Walk(root, func(path string, info os.FileInfo, err error) error {
 		if err != nil {
 			return err
 		}
+		// Skip symlinks: check both the symlink bit and irregular files
+		// On Windows, os.Lstat may not set ModeSymlink for junction points,
+		// so also skip files that are neither regular files nor directories
+		linfo, lerr := os.Lstat(path)
+		if lerr != nil {
+			return nil
+		}
+		mode := linfo.Mode()
+		if mode&os.ModeSymlink != 0 {
+			return nil
+		}
 		if !info.IsDir() {
+			if !mode.IsRegular() {
+				return nil
+			}
 			files = append(files, path)
 		}
 		return nil