|
| 1 | +name: commit-trailers |
| 2 | +on: |
| 3 | + pull_request: |
| 4 | + merge_group: |
| 5 | + |
| 6 | +permissions: |
| 7 | + contents: read |
| 8 | + pull-requests: read |
| 9 | + |
| 10 | +jobs: |
| 11 | + no-ai-coauthor: |
| 12 | + runs-on: ubuntu-latest |
| 13 | + steps: |
| 14 | + - name: Reject AI Co-Authored-By trailers |
| 15 | + uses: actions/github-script@v7 |
| 16 | + with: |
| 17 | + script: | |
| 18 | + const pr = context.payload.pull_request; |
| 19 | + if (!pr) return; |
| 20 | + const commits = await github.paginate(github.rest.pulls.listCommits, { |
| 21 | + owner: context.repo.owner, |
| 22 | + repo: context.repo.repo, |
| 23 | + pull_number: pr.number, |
| 24 | + }); |
| 25 | + // Known AI coding agents that stamp a `Co-Authored-By:` trailer, |
| 26 | + // matched by their vendor email or distinctive bot login. We key on |
| 27 | + // bot identities (unambiguous), never on bare human names, so |
| 28 | + // legitimate human co-authors are never blocked. |
| 29 | + const AI_AGENTS = new RegExp([ |
| 30 | + 'anthropic\\.com', // Claude / Claude Code |
| 31 | + 'copilot-swe-agent', // GitHub Copilot |
| 32 | + '\\+copilot@users\\.noreply', // GitHub Copilot |
| 33 | + 'devin-ai-integration', // Devin (Cognition) |
| 34 | + 'cursoragent|@cursor\\.com', // Cursor Agent |
| 35 | + 'google-labs-jules', // Google Jules / Gemini |
| 36 | + '@aider\\.chat', // Aider |
| 37 | + 'windsurf|codeium', // Windsurf / Codeium |
| 38 | + ].join('|'), 'i'); |
| 39 | + const coAuthorLine = /^\s*co-authored-by:.*$/gim; |
| 40 | + const offenders = commits |
| 41 | + .filter((c) => |
| 42 | + (c.commit.message.match(coAuthorLine) || []).some((l) => |
| 43 | + AI_AGENTS.test(l), |
| 44 | + ), |
| 45 | + ) |
| 46 | + .map((c) => c.sha.slice(0, 8)); |
| 47 | + if (offenders.length === 0) { |
| 48 | + core.info('No AI Co-Authored-By trailers found.'); |
| 49 | + return; |
| 50 | + } |
| 51 | + const msg = [ |
| 52 | + `Commits ${offenders.join(', ')} carry a "Co-Authored-By: <AI agent>" trailer.`, |
| 53 | + '', |
| 54 | + 'Under US copyright law (which governs CNCF projects) a Co-Authored-By', |
| 55 | + 'trailer naming an AI agent can attribute rights over the code to its', |
| 56 | + 'vendor. Use an informational "Assisted-By: <agent>" trailer instead — it', |
| 57 | + 'discloses AI assistance without transferring authorship.', |
| 58 | + '', |
| 59 | + 'Rationale: https://github.com/anthropics/claude-code/issues/66602', |
| 60 | + '', |
| 61 | + 'Fix: rebase and amend the trailer, then force-push.', |
| 62 | + 'Prevent it at source: set includeCoAuthoredBy: false in your Claude Code settings.', |
| 63 | + ].join('\n'); |
| 64 | + await core.summary.addRaw(msg).write(); |
| 65 | + core.setFailed(msg); |
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