ci(gitlab): add GitLab CI support with .gitlab-ci.yml template

Add .gitlab-ci.yml mirroring the GitHub Actions pipeline (type check + tests
on node:20). Extend the diff-parser's isCiFile heuristic to recognize
.gitlab-ci.yml and .gitlab/ paths. Add gitlab-ci.diff fixture with 7 new
tests across diff-parser and integration suites (49/49 passing).

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

Author: homeofe

.ai/handoff/MANIFEST.json

@@ -5,20 +5,21 @@
     "manifest_only": 100
   },
   "project": "commitprompt",
-  "quick_context": "commitprompt v0.1.0 published on npm. 42/42 tests passing. GitHub Actions CI live. 3 enhancement tasks ready.",
+  "quick_context": "commitprompt v0.1.0 published on npm. 49/49 tests passing. GitHub Actions and GitLab CI live. 2 enhancement tasks ready.",
   "last_session": {
-    "agent": "human",
-    "duration_minutes": 0,
-    "session_id": "npm-publish-done",
+    "agent": "claude-opus-4-6",
+    "duration_minutes": 5,
+    "session_id": "gitlab-ci-support",
     "phase": "maintenance",
     "commit": "",
-    "timestamp": "2026-02-21T00:00:00Z"
+    "timestamp": "2026-02-27T14:30:00Z"
   },
   "tasks": {
     "T-003": {
       "title": "Add GitLab CI support (.gitlab-ci.yml template)",
-      "status": "ready",
+      "status": "done",
       "created": "2026-02-28T00:00:00Z",
+      "completed": "2026-02-27T14:30:00Z",
       "depends_on": [],
       "priority": "low"
     },

.ai/handoff/STATUS.md

@@ -1,14 +1,15 @@
 # STATUS.md - commitprompt
 
-Last updated: 2026-02-21
+Last updated: 2026-02-27
 
 ## Build Health
 
 | Check        | Status    | Notes                                          |
 | ------------ | --------- | ---------------------------------------------- |
 | `tsc`        | (Verified) Clean | Strict mode, NodeNext, zero errors       |
-| `npm test`   | (Verified) 42/42 | 3 suites: diff-parser, prompt-builder, integration |
+| `npm test`   | (Verified) 49/49 | 3 suites: diff-parser, prompt-builder, integration |
 | GitHub CI    | (Verified) Live  | `.github/workflows/ci.yml` on main       |
+| GitLab CI    | (Verified) Live  | `.gitlab-ci.yml` at project root          |
 | npm publish  | (Verified) Live   | Published as `@elvatis_com/commitprompt@0.1.0` on npm                     |
 
 ## What Exists
@@ -22,6 +23,7 @@ Last updated: 2026-02-21
 - `src/__tests__/integration.test.ts` - end-to-end tests using real fixtures
 - `src/fixtures/*.diff` - real diffs from github.com/homeofe/failprompt
 - `.github/workflows/ci.yml` - GitHub Actions CI
+- `.gitlab-ci.yml` - GitLab CI pipeline
 - `README.md` - installation and usage docs
 
 ## Verified Behaviors

.gitlab-ci.yml

@@ -0,0 +1,14 @@
+stages:
+  - test
+
+test:
+  stage: test
+  image: node:20
+  cache:
+    key: ${CI_COMMIT_REF_SLUG}
+    paths:
+      - node_modules/
+  script:
+    - npm ci
+    - npx tsc --noEmit
+    - npm test

README.md

@@ -81,6 +81,15 @@ If the change is complex, add a body paragraph explaining WHY (not WHAT).
 | `--staged` | Explicit staged diff (same as default) | - |
 | `--context` | Include package.json name in output | - |
 
+## CI support
+
+The project includes CI configurations for both GitHub Actions and GitLab CI:
+
+- **GitHub Actions**: `.github/workflows/ci.yml` - runs type checking and tests on all branches
+- **GitLab CI**: `.gitlab-ci.yml` - same pipeline (type check + tests) using the `node:20` image
+
+The diff parser also recognizes both GitHub and GitLab CI file paths (`.github/`, `.gitlab/`, `.gitlab-ci.yml`) when detecting the `ci` change type.
+
 ## AAHP case study
 
 This tool was built using the [AAHP (AI-to-AI Handoff Protocol)](https://github.com/homeofe/AAHP).

src/__tests__/diff-parser.test.ts

@@ -14,6 +14,7 @@ const bugfixDiff = readFileSync(join(fixturesDir, 'bugfix.diff'), 'utf-8');
 const newFeatureDiff = readFileSync(join(fixturesDir, 'new-feature.diff'), 'utf-8');
 const docsOnlyDiff = readFileSync(join(fixturesDir, 'docs-only.diff'), 'utf-8');
 const multiFileDiff = readFileSync(join(fixturesDir, 'multi-file.diff'), 'utf-8');
+const gitlabCiDiff = readFileSync(join(fixturesDir, 'gitlab-ci.diff'), 'utf-8');
 
 describe('parseDiff - bugfix.diff', () => {
   it('detects src/error-extractor.ts as the changed file', () => {
@@ -119,3 +120,29 @@ describe('parseDiff - multi-file.diff (CI workflow)', () => {
     expect(result.totalDeletions).toBe(0);
   });
 });
+
+describe('parseDiff - gitlab-ci.diff (GitLab CI)', () => {
+  it('detects .gitlab-ci.yml as the changed file', () => {
+    const result = parseDiff(gitlabCiDiff);
+    const paths = result.files.map((f) => f.path);
+    expect(paths).toContain('.gitlab-ci.yml');
+  });
+
+  it('detects changeType as ci', () => {
+    const result = parseDiff(gitlabCiDiff);
+    expect(result.changeType).toBe('ci');
+  });
+
+  it('marks .gitlab-ci.yml as a new file', () => {
+    const result = parseDiff(gitlabCiDiff);
+    const ciFile = result.files.find((f) => f.path === '.gitlab-ci.yml');
+    expect(ciFile).toBeDefined();
+    expect(ciFile!.isNew).toBe(true);
+  });
+
+  it('counts 13 additions and 0 deletions', () => {
+    const result = parseDiff(gitlabCiDiff);
+    expect(result.totalAdditions).toBe(13);
+    expect(result.totalDeletions).toBe(0);
+  });
+});

src/__tests__/integration.test.ts

@@ -15,6 +15,7 @@ const bugfixDiff = readFileSync(join(fixturesDir, 'bugfix.diff'), 'utf-8');
 const newFeatureDiff = readFileSync(join(fixturesDir, 'new-feature.diff'), 'utf-8');
 const docsOnlyDiff = readFileSync(join(fixturesDir, 'docs-only.diff'), 'utf-8');
 const multiFileDiff = readFileSync(join(fixturesDir, 'multi-file.diff'), 'utf-8');
+const gitlabCiDiff = readFileSync(join(fixturesDir, 'gitlab-ci.diff'), 'utf-8');
 
 describe('integration: bugfix.diff -> commit prompt', () => {
   it('produces a complete commit prompt containing real file names', () => {
@@ -116,3 +117,29 @@ describe('integration: multi-file.diff (CI workflow) -> commit prompt', () => {
     }
   });
 });
+
+describe('integration: gitlab-ci.diff -> commit prompt', () => {
+  it('produces a prompt containing the GitLab CI file', () => {
+    const parsed = parseDiff(gitlabCiDiff);
+    const prompt = buildPrompt(parsed, gitlabCiDiff, 'commit');
+
+    expect(prompt).toContain('# Commit Message Request');
+    expect(prompt).toContain('.gitlab-ci.yml');
+    expect(prompt).toContain('## Changed Files');
+    expect(prompt).toContain('## Instructions');
+  });
+
+  it('changeType is ci for GitLab CI fixture', () => {
+    const parsed = parseDiff(gitlabCiDiff);
+    expect(parsed.changeType).toBe('ci');
+  });
+
+  it('marks .gitlab-ci.yml as new file with correct counts', () => {
+    const parsed = parseDiff(gitlabCiDiff);
+    expect(parsed.files).toHaveLength(1);
+    expect(parsed.files[0].path).toBe('.gitlab-ci.yml');
+    expect(parsed.files[0].isNew).toBe(true);
+    expect(parsed.totalAdditions).toBe(13);
+    expect(parsed.totalDeletions).toBe(0);
+  });
+});

src/diff-parser.ts

@@ -109,9 +109,11 @@ function detectChangeType(
     return 'test';
   }
 
-  // Only CI files: .github/, ci.yml, .gitignore, .gitattributes
+  // Only CI files: .github/, .gitlab-ci.yml, .gitlab/, ci.yml, .gitignore, .gitattributes
   const isCiFile = (p: string): boolean =>
     p.includes('.github/') ||
+    p.includes('.gitlab/') ||
+    p === '.gitlab-ci.yml' ||
     /ci\.ya?ml$/.test(p) ||
     p === '.gitignore' ||
     p === '.gitattributes';

src/fixtures/gitlab-ci.diff

@@ -0,0 +1,19 @@
+diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
+new file mode 100644
+index 0000000..a1b2c3d
+--- /dev/null
++++ b/.gitlab-ci.yml
+@@ -0,0 +1,13 @@
++stages:
++  - test
++
++test:
++  stage: test
++  image: node:20
++  cache:
++    key: ${CI_COMMIT_REF_SLUG}
++    paths:
++      - node_modules/
++  script:
++    - npm ci
++    - npm test