Auto-fix nightly lint failures with Claude Code (PR-only)

[bmander]

What

Adds .github/workflows/claude-fix-nightly-lint.yml. When the nightly Android Lint leg fails, this workflow reproduces the findings and has Claude Code fix them at their source per CLAUDE.md, verify lint is green, and open a PR for human review. It never merges.

How it's wired

• Trigger: workflow_run on completion of "Android Nightly" (+ manual workflow_dispatch). Decoupled from android-nightly.yml so a slow fix+verify cycle can't tangle with that workflow's concurrency: nightly, cancel-in-progress.
• detect job (cheap gate): workflow_run fires on the whole nightly's conclusion, so this job inspects the run's jobs and proceeds only if the lint job specifically failed — not all-brands or smoke-api23. It also captures the failing head_sha.
• fix job: checks out the failing commit, reproduces lintObaGoogleDebug (capturing console + HTML/XML reports), then hands them to anthropics/claude-code-action@v1. Prompt is scoped to CLAUDE.md: fix at source, no baseline, opt-outs only with rationale + issue link and flagged NEEDS HUMAN SIGN-OFF, verify green before claiming success (draft PR otherwise), never merge. Capped at --max-turns 40 and timeout-minutes: 60.

Before this can run

• ANTHROPIC_API_KEY repo secret — not currently configured; the workflow is inert until a maintainer adds it. Adding it lets workflow runs spend against the org's Anthropic account.
• PR-trigger caveat: as written it uses the default GITHUB_TOKEN, so CI (android.yml) will not auto-run on the bot's fix PR (GitHub limitation: token-created PRs don't trigger downstream workflows). To get CI on the fix PR, install the Claude GitHub App or pass a PAT/App token via the action's github_token.

Notes

• Opened as a draft deliberately — this is infrastructure to review before enabling, and the bot itself only ever proposes (never auto-merges), consistent with CLAUDE.md's human-sign-off gate on lint opt-outs/heuristics.

🤖 Generated with Claude Code

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch claude-fix-nightly-lint

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[bmander]

Will not implement until such time as we have an org Anthropic account (or similar).