GitNexus/CONTRIBUTING.md

Contributing to GitNexus

How to propose changes, run checks locally, and open pull requests.

License

This project uses the PolyForm Noncommercial License 1.0.0. By contributing, you agree your contributions are licensed under the same terms unless stated otherwise.

Where to discuss

• Issues & feature ideas: use GitHub Issues for the upstream repo, or your fork’s tracker if you work from a fork.
• Community: see the Discord link in the root README.md.

Development setup

1. Clone the repository.
2. CLI / MCP package: cd gitnexus && npm install && npm run build
3. Web UI (if needed): cd gitnexus-web && npm install
4. Run tests as described in TESTING.md.

Branch and pull requests

• Use short-lived branches off the default branch of the repo you are targeting.
• PR titles MUST follow the conventional-commit format — pr-labeler.yml enforces this on every PR and auto-applies the matching label so release notes group the change correctly.
• PR description: what changed, why, how to verify (commands), and any risk or rollback notes.

Pull request titles

Format: <type>[(scope)][!]: <subject>

Allowed types and the release-notes section each one lands in (defined in .github/release.yml):

Type	Label applied	Release-notes section
feat	enhancement	🚀 Features
fix	bug	🐛 Bug Fixes
perf	performance	🏎️ Performance
refactor	refactor	🔄 Refactoring
test	test	🧪 Tests
ci	ci	👷 CI/CD
build / deps	dependencies	📦 Dependencies
docs	documentation	(grouped under Other Changes unless a Docs section is added)
chore / revert	chore	(excluded from release notes)

Append ! to the type (e.g. feat(api)!: drop /v1 endpoint) or include BREAKING CHANGE: in the PR body to flag a breaking change — the labeler then adds the breaking label and the 💥 Breaking Changes section is rendered first.

Examples:

feat(web): add smart chat scroll
fix(extractors): resolve silent contract mis-resolution
perf: avoid O(n²) traversal in heritage walker
chore(deps): bump vitest to 3.0.0
ci: standardize workflow concurrency

Commits within a PR may use any style — only the merged PR title shows up in release notes, so that's the one the convention applies to.

Before you open a PR

• Tests pass for the packages you touched (gitnexus and/or gitnexus-web).
• Typecheck passes: npx tsc --noEmit in gitnexus/ and npx tsc -b --noEmit in gitnexus-web/.
• No secrets, tokens, or machine-specific paths committed.
• Documentation updated if behavior or public CLI/MCP contract changes.
• Pre-commit hook runs clean (.husky/pre-commit — formatting via lint-staged + typecheck for staged packages; tests run in CI only).

Code review

Maintainers may request changes for correctness, tests, performance, or consistency with existing patterns. Keeping diffs focused makes review faster.

GitHub Actions — Concurrency Convention

Every workflow under .github/workflows/ MUST declare a top-level concurrency: block using this convention:

• Group key starts with ${{ github.workflow }} so no two workflows can collide on the same group name. The discriminator that follows is chosen per event shape:

  • Branch/tag scope: ${{ github.workflow }}-${{ github.ref }}
  • Per-PR scope (for issue_comment, pull_request_review*, pull_request meta events): ${{ github.workflow }}-${{ github.event.pull_request.number || github.event.issue.number }}
  • workflow_run scope (e.g. ci-report.yml): ${{ github.workflow }}-${{ github.event.workflow_run.pull_requests[0].number || format('{0}/{1}', github.event.workflow_run.head_repository.full_name, github.event.workflow_run.head_branch) }} — the fork fallback must be stable across reruns (never workflow_run.id, which is per-run-unique and defeats serialization).
  • Global single-slot (manual dispatch utilities): ${{ github.workflow }}
  • Reusable workflows invoked via workflow_call: do NOT use ${{ github.workflow }} in the group key — in called-workflow context its evaluation is ambiguous and can resolve to the caller's name, which would deadlock against the caller's own group. Use a hardcoded literal prefix and a github.event_name-aware expression that falls through to github.run_id for reusable invocations (see ci.yml for the canonical form).
  • Merge queue (merge_group): when this event is added, use ${{ github.workflow }}-${{ github.event.merge_group.head_ref }} with cancel-in-progress: false (every queue entry is a distinct ref; never cancel).

• cancel-in-progress policy:

  Event	cancel-in-progress	Why
  pull_request CI run	true	New push supersedes old run
  push to main	false	Every main commit gets validated
  Tag push (v* publish)	false	Never cancel mid-publish
  push to main for release-candidate	false	Never cancel mid-RC publish
  workflow_dispatch (release/publish)	false	Manual runs are intentional
  workflow_run (sticky-comment reports)	false	Serialize, don't race
  Per-PR bot workflows (@claude, review)	false	Serialize comments per PR
  PR-meta re-checks (pr-description-check)	true	Cheap, latest wins
  Single-slot utilities (triage sweep)	true	Latest dispatch supersedes

• For workflows that serve multiple events at once (e.g. ci.yml handles pull_request, push, and workflow_call), make cancel-in-progress event-aware:

  concurrency:
    group: ${{ github.workflow }}-${{ github.ref }}
    cancel-in-progress: ${{ github.event_name == 'pull_request' }}
  

• When adding a new workflow, copy the concurrency block from an existing workflow of the same event shape.

AI-assisted contributions

If you use coding agents, follow project context files (e.g. AGENTS.md, CLAUDE.md) and avoid drive-by refactors unrelated to the issue. Prefer incremental, test-backed changes.

Releases

Two publish workflows ship gitnexus to npm:

• Stable (.github/workflows/publish.yml) — triggered by pushing any v* tag. Publishes to the latest dist-tag with a changelog-backed GitHub release. Maintainers are expected to tag from main as a convention; the workflow itself does not enforce branch reachability.

• Release Candidate (.github/workflows/release-candidate.yml) — runs on every push to main (typically a merged PR) plus manual dispatch. Docs-only changes are skipped via paths-ignore. Publishes to the rc dist-tag with version X.Y.Z-rc.N and a GitHub prerelease, where:

  • X.Y.Z is selected automatically. On push (and on dispatch with bump: auto, the default) the workflow continues the active rc cycle: if the registry already has X.Y.Z-rc.* versions with X.Y.Z > current latest, it reuses the highest such base; otherwise it patch-bumps from latest. Dispatching with bump: patch|minor|major resets the cycle from latest.
  • N is auto-incremented against existing X.Y.Z-rc.* entries on the registry. First rc for a given base is rc.1.

  Idempotency: the workflow pushes an rc/<HEAD_SHA> marker tag and a v<RC> release tag atomically, before calling npm publish. The guard refuses to re-run once the marker exists, so a post-publish failure will not mint a duplicate rc for the same commit. The v<RC> tag points at a detached release commit whose package.json matches the npm tarball exactly (traceable releases). Recovery after a partial failure:

  git push --delete origin rc/<HEAD_SHA> v<RC>
  # then redispatch the workflow with force: true
  

The rc workflow never moves latest. To verify after a change, inspect dist-tags:

npm view gitnexus dist-tags