chore: replace stale 'master' branch refs with 'main' (post-rename cleanup)#39
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…eanup) The default branch was renamed master → main on 2026-04-26 via atomic gh api .../branches/master/rename. GitHub auto-redirect kept all old 'master' references working transparently, but the hardcoded refs should be replaced for clarity and to avoid surprise on future tooling that doesn't follow redirects. Replaces 8 occurrences across 5 files: 1. .github/workflows/ci.yml × 2 — `branches: [main, master]` → `[main]` (master no longer receives pushes; the defensive dual-listing is now dead code) 2. .github/workflows/codeql.yml × 2 — same as ci.yml 3. pyproject.toml — Changelog URL `blob/master/CHANGELOG.md` → `main` (PyPI metadata; auto-redirect works but cleaner to point at the live ref) 4. README.md × 3 — CI badge, CodeQL badge, License link all `?branch=master` / `blob/master/` → `main` (badges currently render fine via redirect but the badge URL parameter is the canonical source) 5. SECURITY.md — "latest release on `master`" → "on `main`" No code or behaviour changes. Pure ref-cleanup post the master→main rename. Internal memory entry: fix_instinct_default_branch_rename.md documented this cleanup as deferred Tier 3 polish; this PR closes it. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
Post-rename cleanup. The default branch was renamed
master→mainon 2026-04-26 via atomicgh api .../branches/master/rename. GitHub auto-redirect kept all oldmasterreferences working transparently, but the hardcoded refs should be replaced for clarity and to avoid surprise on future tooling that doesn't follow redirects.What changes
8 occurrences across 5 files, all pure ref-cleanup:
.github/workflows/ci.ymlbranches: [main, master]→[main](master no longer receives pushes; defensive dual-listing is dead code).github/workflows/codeql.ymlpyproject.tomlblob/master/CHANGELOG.md→main(PyPI metadata)README.md?branch=master+ License linkblob/master/→ allmainSECURITY.mdmaster" → "onmain"What does NOT change
No code, no behaviour, no test surface. Workflows continue to trigger on the same branch (just now spelled correctly). PyPI Changelog link continues to resolve (auto-redirect already worked; this just bypasses the redirect). Badges continue to render (canonical URL parameter updated).
Why now
Surfaced as deferred Tier 3 polish in the 2026-04-26 cross-repo health check after the
master→mainrename shipped. Auto-redirect masking these refs means there was no production urgency, but they're a small papercut for readers and an obvious gotcha for the next agent doing tooling work on this repo.Test plan
git diff --statshows 5 files / 9 insertions / 9 deletions (line-for-line replacement)grep -rn "master" .github/ pyproject.toml README.md SECURITY.mdreturns empty (verified pre-commit)🤖 Generated with Claude Code