infrastructure: set up CI pipeline with lint, typecheck, and full test suite

[ShantKhatri]

Summary

The project currently has no continuous integration pipeline. Set up a GitHub Actions CI workflow that runs on every pull request to enforce code quality across all packages in the monorepo.

Context

The monorepo uses pnpm workspaces. The packages are: apps/backend, apps/mobile, apps/web, and packages/shared. Each has its own test and typecheck scripts.

Tasks

• create .github/workflows/ci.yml with:
  • Trigger: push on main, pull_request on all branches.
  • Node.js matrix: [18, 20].
  • Steps:
    1. Checkout code.
    2. Set up pnpm via pnpm/action-setup.
    3. Install dependencies with pnpm install --frozen-lockfile.
    4. Run pnpm -r run typecheck (TypeScript compilation check).
    5. Run pnpm -r run lint (ESLint across all packages).
    6. Run pnpm -r run test (Vitest + Jest).
  • Upload test coverage artifacts.
• create .github/workflows/pr-title.yml that enforces Conventional Commits format in PR titles using amannn/action-semantic-pull-request.
• add a pnpm run typecheck script to any package that lacks it.
• add a pnpm run lint script to any package that lacks it using ESLint config.
• document the CI setup in CONTRIBUTING.md under a 'CI / Pipeline' section.
• add a GitHub Actions badge to the root README.md.

Acceptance Criteria

• CI runs automatically on every PR and blocks merge on failure.
• all three stages (typecheck, lint, test) must pass.
• PR title enforcement is active.
• CI badge shows current status in README.

Difficulty

medium — requires GitHub Actions knowledge, pnpm monorepo workspace awareness, and CI/CD best practices.

[bonubhavana04]

Hi,
I would like to work on resolving this issue. Please assign it to me. I’m a participant in GSSoC 2026 and would be happy to contribute.
Looking forward to collaborating with you.