1 files changed, 14 insertions, 2 deletions
diff --git a/internal/behavior/store.go b/internal/behavior/store.go
index a558f87..4051836 100644
--- a/internal/behavior/store.go
+++ b/internal/behavior/store.go
@@ -47,12 +47,24 @@ func BuildRoomIndex(dir string) map[int]string {
 
 func WalkYAMLDir(dir string, fn func(path, id string, data []byte) error) error {
 	return filepath.WalkDir(dir, func(path string, d os.DirEntry, err error) error {
-		if err != nil || d.IsDir() || !strings.HasSuffix(d.Name(), ".yaml") {
+		if err != nil {
+			// A missing root is an empty tree; any other walk error (for
+			// example an unreadable directory) must surface instead of
+			// silently validating nothing.
+			if os.IsNotExist(err) {
+				return nil
+			}
+			return err
+		}
+		if d.IsDir() || !strings.HasSuffix(d.Name(), ".yaml") {
 			return nil
 		}
 		data, readErr := os.ReadFile(path)
 		if readErr != nil {
-			return nil
+			if os.IsNotExist(readErr) {
+				return nil
+			}
+			return readErr
 		}
 		id := strings.TrimSuffix(d.Name(), ".yaml")
 		return fn(path, id, data)