chore(ci): auto-merge Dependabot patch/minor PRs#1188
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Add a workflow that approves and enables auto-merge on Dependabot patch/minor PRs. Approval uses a code-owner PAT so the existing code-owner review gate stays intact; major bumps still require manual review, and all merges wait on required CI checks. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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Jul 20, 2026
Follow-up hardening for the auto-merge workflow added in #1188, from a security review. ## Changes - **Gate on PR author, not triggerer.** `github.actor` reflects whoever triggered the latest event (e.g. a re-run), not the PR author. Switch to `github.event.pull_request.user.login == 'dependabot[bot]'` so the job only runs for PRs actually opened by Dependabot. - **Pin `dependabot/fetch-metadata` to a commit SHA** (`25dd0e3` # v3.1.0) instead of the mutable `@v3` tag, closing the supply-chain window on that step. ## Not changed (by design) - Auto-approve/merge itself: intended feature. Code-owner review gate stays enforced (PAT approves as the owner), CI checks still required, major bumps still excluded. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Adds
.github/workflows/dependabot-auto-merge.yml: approves and enables auto-merge on Dependabot patch/minor PRs.How it works
pull_request_target, gated togithub.actor == 'dependabot[bot]'.dependabot/fetch-metadataclassifies the update; major bumps are skipped (still need manual review).gh pr merge --auto --squash. Auto-merge waits for required checks (Lint Code, Run tests, Validate PR title) before merging;delete_branch_on_mergecleans up.Why a PAT instead of the deploy App
The
mainruleset requires a code-owner review (CODEOWNERS =@bagelbits). A bot/App can't be a code owner, so an App approval wouldn't satisfy the gate — using it would force droppingrequire_code_owner_review, widening merge authority to all push collaborators. A code-owner PAT approves as the owner, so the ruleset stays untouched and human PRs are unaffected.Setup required before this works
DEPENDABOT_AUTOMERGE_TOKEN: fine-grained PAT owned by @bagelbits, scoped to this repo, Pull requests + Contents read/write.Not included
🤖 Generated with Claude Code