CI failure: Homebrew/actions/setup-homebrew@master no longer resolves (default branch renamed to main)

[claude]

Summary

The Smoke Test CI workflow is failing at the Set up job step of the Linters job with:

##[error]Unable to resolve action `homebrew/actions@master`, unable to find version `master`

• Workflow: Smoke Test CI (.github/workflows/smoke.yml)
• Branch: rules/workflow-agent-scale
• Run ID: 35059659962
• Commit: b8a10a8
• PR: feat(claude): add workflow-agent-scale rule #426

Root cause

Homebrew/actions renamed its default branch from master to main. Any workflow referencing Homebrew/actions/setup-homebrew@master can no longer resolve the ref and fails during job setup. This is unrelated to the branch's code changes.

Evidence: .github/workflows/benchmarks.yml:29 already uses Homebrew/actions/setup-homebrew@main and is unaffected.

Fix (verified locally, could not be pushed)

Change all Homebrew/actions/setup-homebrew@master references to @main:

• .github/workflows/smoke.yml:31
• .github/workflows/smoke.yml:57
• .github/workflows/sbom.yml:30
• .github/workflows/coverage.yml:29
• .github/workflows/claude.yml:71

-        uses: Homebrew/actions/setup-homebrew@master
+        uses: Homebrew/actions/setup-homebrew@main

Why this was not auto-applied

The auto-fix bot prepared and committed this change, but git push was rejected:

refusing to allow a GitHub App to create or update workflow `.github/workflows/claude.yml`
without `workflows` permission

The GitHub App token used for auto-fix lacks the workflows permission required to modify files under .github/workflows/. A maintainer needs to apply the one-line change above (or grant the workflows permission scope to the auto-fix workflow's token).

Suggested labels: bug, ci-failure

[laurigates]

Duplicate of #414. Fixed by #430 (43fd03d), which changes the five sites listed here (smoke.yml:31, smoke.yml:57, sbom.yml:30, coverage.yml:29, claude.yml:71) from @master to @main. Setup Homebrew passes on main at be2fd3b: https://github.com/laurigates/dotfiles/actions/runs/35738657555. Pinning the ref to a release SHA is tracked in #416.