2 files changed, 52 insertions, 4 deletions

diff --git a/internal/behavior/store.go b/internal/behavior/store.go
index f2e9350..d31fe84 100644
--- a/internal/behavior/store.go
+++ b/internal/behavior/store.go
@@ -84,7 +84,11 @@ func WalkYAMLDir(dir string, fn func(path, id string, data []byte) error) error
 			}
 			return err
 		}
-		if d.IsDir() || !strings.HasSuffix(d.Name(), ".yaml") {
+		if d.IsDir() {
+			return nil
+		}
+		id, ok := yamlID(d.Name())
+		if !ok {
 			return nil
 		}
 		if excludedContentPath(dir, path) {
@@ -97,11 +101,23 @@ func WalkYAMLDir(dir string, fn func(path, id string, data []byte) error) error
 			}
 			return readErr
 		}
-		id := strings.TrimSuffix(d.Name(), ".yaml")
 		return fn(path, id, data)
 	})
 }
 
+// yamlID returns the id (filename without extension) for a .yaml or .yml file.
+// The runtime trigger loader accepts .yml, so validation discovery must too,
+// otherwise such a file loads and fires while every check ignores it.
+func yamlID(name string) (string, bool) {
+	if strings.HasSuffix(name, ".yaml") {
+		return strings.TrimSuffix(name, ".yaml"), true
+	}
+	if strings.HasSuffix(name, ".yml") {
+		return strings.TrimSuffix(name, ".yml"), true
+	}
+	return "", false
+}
+
 type Duplicate struct {
 	ID    string
 	Paths []string
@@ -110,13 +126,16 @@ type Duplicate struct {
 func CheckDuplicateIDs(dir string) []Duplicate {
 	seen := make(map[string][]string)
 	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 || d.IsDir() {
+			return nil
+		}
+		id, ok := yamlID(d.Name())
+		if !ok {
 			return nil
 		}
 		if excludedContentPath(dir, path) {
 			return nil
 		}
-		id := strings.TrimSuffix(d.Name(), ".yaml")
 		seen[id] = append(seen[id], path)
 		return nil
 	})
diff --git a/internal/behavior/yml_test.go b/internal/behavior/yml_test.go
new file mode 100644
index 0000000..9452e9e
--- /dev/null
+++ b/internal/behavior/yml_test.go
@@ -0,0 +1,29 @@
+package behavior
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+// Regression: WalkYAMLDir only matched .yaml, so a .yml trigger file loaded
+// and fired at runtime while every validation pass ignored it.
+func TestWalkYAMLDirIncludesYml(t *testing.T) {
+	dir := t.TempDir()
+	if err := os.WriteFile(filepath.Join(dir, "a.yaml"), []byte("x: 1"), 0644); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(dir, "b.yml"), []byte("x: 2"), 0644); err != nil {
+		t.Fatal(err)
+	}
+	ids := map[string]bool{}
+	if err := WalkYAMLDir(dir, func(path, id string, data []byte) error {
+		ids[id] = true
+		return nil
+	}); err != nil {
+		t.Fatal(err)
+	}
+	if !ids["a"] || !ids["b"] {
+		t.Fatalf("WalkYAMLDir ids = %v, want both a and b", ids)
+	}
+}