github

name	github
version	1.2.0
updated	"2026-05-18T00:00:00.000Z"
description	GitHub CLI (gh) and Actions workflow development. Use for gh PRs, issues, releases, API, Actions triggers/jobs/steps, caching, matrix builds, self-hosted runners, setup-node, or browser test caching.

GitHub

Overview

Comprehensive GitHub development covering the gh CLI for repository operations and GitHub Actions for CI/CD automation, with emphasis on workflow optimization and cost reduction.

Related skills

• copilot — GitHub Copilot PR code review setup, .github/copilot-instructions.md authoring, and bridging Copilot config to .claude/skills/.

gh CLI Quick Reference

# Auth
gh auth login                    # Interactive login
gh auth status                   # Check auth state
gh auth token                    # Print token

# PRs
gh pr create --fill              # Create PR, auto-fill title/body from commits
gh pr list --state open
gh pr checkout 123
gh pr merge 123 --squash

# Issues
gh issue create --title "Bug" --body "Description" --label bug
gh issue list --assignee @me

# Releases
gh release create v1.0.0 --generate-notes

# API
gh api repos/{owner}/{repo}/actions/runs --jq '.workflow_runs[].status'
gh api graphql -f query='{ viewer { login } }'

See gh-cli.md and gh-cli-advanced.md for complete reference.

GitHub Actions Workflow Structure

name: CI
on:
  push:
    branches: [main]
    paths-ignore: ['**.md']
  pull_request:
    branches: [main]
  workflow_dispatch:

concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

jobs:
  build:
    runs-on: ubuntu-latest
    timeout-minutes: 10
    steps:
      - uses: actions/checkout@v4
      - uses: actions/setup-node@v4
        with:
          node-version: '20'
          cache: 'npm'
      - run: npm ci
      - run: npm test

See actions-triggers-jobs.md and actions-steps-expressions.md for full details.

Key Optimization Techniques

Technique	Savings
Use ubuntu-latest over macos-latest	10x cheaper
Shallow clone: fetch-depth: 1	Faster checkout
Cache dependencies via setup-action	50-80% faster
Parallel matrix jobs	Wall-clock time
timeout-minutes on jobs	Prevent runaways
concurrency.cancel-in-progress	Kill stale runs

See optimization-caching.md and optimization-workflows.md for advanced patterns.

Debugging Workflows

env:
  ACTIONS_STEP_DEBUG: true

- run: echo '${{ toJSON(github) }}'
- uses: mxschmitt/action-tmate@v3
  if: failure()

Local testing: act push, act -j build, act --secret-file .secrets

Resources

• gh-cli.md - Core gh commands (PRs, issues, releases, repos, runs)
• gh-cli-advanced.md - API, secrets, extensions, config, patterns
• actions-triggers-jobs.md - Triggers, concurrency, jobs, matrix, runners
• actions-jobs-services.md - Services containers and container jobs
• actions-steps-expressions.md - Steps, contexts, expressions, secrets
• optimization-caching.md - Dependency, build, Docker layer caching
• optimization-workflows.md - Parallelization, path filters, self-hosted runners
• nodejs.md - Node.js/npm/pnpm/yarn, Playwright/Cypress caching, monorepos
• copilot skill - Copilot PR review and custom instructions