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---
name: setting-up-ci
description: Set up a GitHub Actions CI/CD pipeline with linting, testing, type-checking, and deployment steps.
---
# Setup CI (GitHub Actions)
Use this skill when the user asks to set up CI, continuous integration, a build pipeline, or GitHub Actions.
## Steps
1. **Detect the project structure** — check for `package.json` (Node.js), `requirements.txt` / `pyproject.toml` (Python), `go.mod` (Go), or monorepo tools like Turborepo.
2. **Create `.github/workflows/ci.yml`**
For a Node.js project:
```yaml
name: CI
on:
push:
branches: [main]
pull_request:
branches: [main]
jobs:
build:
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: 20
cache: npm
- run: npm ci
- run: npm run lint
- run: npm run typecheck
- run: npm test
- run: npm run build
```
3. **Add type-checking** — if `typecheck` script doesn't exist in `package.json`, add `"typecheck": "tsc --noEmit"`.
4. **Add caching** — the `actions/setup-node` `cache` option handles `node_modules`. For monorepos with Turborepo, add remote caching or `actions/cache` for `.turbo`.
5. **Add matrix testing (optional)** — if the user needs to test across Node versions or OS:
```yaml
strategy:
matrix:
node-version: [18, 20, 22]
```
6. **Add deployment step (optional)** — if requested, add a deploy job that runs only on `main` pushes, gated by the build job succeeding:
```yaml
deploy:
needs: build
if: github.ref == 'refs/heads/main'
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- run: npm ci && npm run build
- run: npx vercel deploy --prod --token=${{ secrets.VERCEL_TOKEN }}
```
7. **Add status badge** — add the workflow status badge to the project README:
```markdown
```
## Notes
- Keep CI fast — run lint and typecheck in parallel using separate jobs if the pipeline is slow.
- Use `npm ci` (not `npm install`) for deterministic installs.
- Store secrets (API keys, deploy tokens) in GitHub repository settings, never in the workflow file.
