diff --git a/bin/gstack-diff-scope b/bin/gstack-diff-scope
index 2cff90c70f..36918381ce 100755
--- a/bin/gstack-diff-scope
+++ b/bin/gstack-diff-scope
@@ -57,7 +57,7 @@ while IFS= read -r f; do
     *.md) DOCS=true ;;
 
     # Config
-    package.json|package-lock.json|yarn.lock|bun.lockb) CONFIG=true ;;
+    package.json|package-lock.json|yarn.lock|bun.lock|bun.lockb) CONFIG=true ;;
     Gemfile|Gemfile.lock) CONFIG=true ;;
     *.yml|*.yaml) CONFIG=true ;;
     .github/*) CONFIG=true ;;
diff --git a/test/diff-scope.test.ts b/test/diff-scope.test.ts
index 44cfe03f3b..2130a3e570 100644
--- a/test/diff-scope.test.ts
+++ b/test/diff-scope.test.ts
@@ -140,6 +140,12 @@ describe('gstack-diff-scope', () => {
     expect(scope.SCOPE_AUTH).toBe('true');
   });
 
+  test('detects config via bun.lock (Bun v1.2+ text lockfile)', () => {
+    const dir = createRepo(['bun.lock']);
+    const scope = runScope(dir);
+    expect(scope.SCOPE_CONFIG).toBe('true');
+  });
+
   test('returns false for all new signals when no matching files', () => {
     const dir = createRepo(['docs/readme.md', 'config.yml']);
     const scope = runScope(dir);