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Category: Development & EngineeringNo API key required

open-source

Open source readiness best practices. Covers licensing, documentation, community health, CI/CD, compliance, legal, and packaging. USE WHEN: user mentions "open source", "license", "LICENSE", "CONTRIBUTING", "CODE_OF_CONDUCT", "CHANGELOG", "open source readiness", "community health", "OSS compliance", "SPDX", "CLA", "DCO", "OpenSSF", "SBOM", "release automation", "npm publish", "make project open source", "prepare for open source" DO NOT USE FOR: Git workflow and branching - use git-workflow skill, Code quality and linting - use qa-expert agent, CI/CD pipeline design - use devops-expert agent

personAuthor: jakexiaohubgithub

Open Source Readiness - Core Knowledge

Deep Knowledge: Use mcp__documentation__fetch_docs with technology: git-workflow for Git-specific documentation.

When NOT to Use This Skill

This skill focuses on open source project setup and compliance. Do NOT use for:

  • Git commands and branching - Use git-workflow skill
  • Code quality and static analysis - Use qa-expert agent
  • CI/CD pipeline architecture - Use devops-expert agent
  • Package development (library code) - Use language-specific skills

Essential Files Checklist

| File | Purpose | Priority | |------|---------|----------| | LICENSE | Legal terms for use and distribution | Required | | README.md | Project overview, install, usage, badges | Required | | CONTRIBUTING.md | How to contribute (setup, PR process, style) | Required | | CODE_OF_CONDUCT.md | Community behavior expectations | Required | | SECURITY.md | Responsible disclosure process | Required | | CHANGELOG.md | Version history (Keep a Changelog) | Recommended | | GOVERNANCE.md | Decision-making process | Recommended | | .github/CODEOWNERS | Auto-assign reviewers by path | Recommended | | .github/FUNDING.yml | Sponsorship links | Optional | | CITATION.cff | Academic citation metadata | Optional | | NOTICE | Third-party attributions (Apache 2.0) | Conditional |

Quick Reference Guides

| Topic | Guide | Covers | |-------|-------|--------| | Licensing | licensing.md | License selection, SPDX, CLA/DCO, compatibility | | Documentation | documentation.md | README, CONTRIBUTING, CHANGELOG, ADR templates | | Community and Governance | community-governance.md | Governance models, maintainer path, communication | | Repository Setup | repository-setup.md | .github/, templates, CODEOWNERS, branch rules | | CI/CD and Automation | ci-cd-automation.md | GitHub Actions, releases, dependency updates | | Compliance | security-compliance.md | OpenSSF Scorecard, SBOM, supply chain | | Legal and Packaging | legal-packaging.md | License headers, NOTICE, publishing, signing | | Metrics and Inclusivity | metrics-inclusivity.md | CHAOSS metrics, inclusive language, badges |

Decision Flowchart

Project needs open source setup?
 - Just starting? -> Run full Tier 1 setup
     - Choose license -> licensing.md
     - Create docs -> documentation.md
     - Setup repo -> repository-setup.md
     - Add CI -> ci-cd-automation.md
 - Already has basics? -> Run audit, fill gaps
     - Missing compliance files? -> security-compliance.md
     - No community docs? -> community-governance.md
     - No release process? -> ci-cd-automation.md
 - Publishing a package? -> legal-packaging.md
 - Growing community? -> community-governance.md + metrics-inclusivity.md
 - Compliance audit? -> security-compliance.md + legal-packaging.md

License Quick Decision

| If you want... | Choose | |-----------------|--------| | Maximum freedom, simple | MIT | | Patent protection included | Apache 2.0 | | Copyleft (derivatives must be open) | GPL v3 | | Copyleft for libraries only | LGPL v3 | | File-level copyleft (compromise) | MPL 2.0 | | Network copyleft (SaaS must share) | AGPL v3 | | Public domain equivalent | Unlicense or 0BSD |

Common Anti-Patterns

| Anti-Pattern | Why It Is Bad | Best Practice | |--------------|---------------|---------------| | No LICENSE file | Code is NOT open source without one | Always include LICENSE | | LICENSE in README only | Not legally clear | Separate LICENSE file | | No CONTRIBUTING.md | Contributors do not know how to help | Clear contribution guide | | No CODE_OF_CONDUCT | Unwelcoming community signal | Adopt Contributor Covenant | | Hardcoded secrets | Credential exposure risk | Use environment variables | | No .gitignore | Accidental binary commits | Comprehensive .gitignore | | No CI pipeline | Untested contributions | GitHub Actions CI | | No issue templates | Low-quality bug reports | Structured YAML templates | | Manual releases | Error-prone, inconsistent | Automated release pipeline | | No SECURITY.md | Issues reported publicly | Private disclosure process |