🛡 Visual-style lint extension — closes the gate gap

The visual-style rule shipped in PR #1939 + piloted in PR #1955. The commit-msg git hook already blocks emoji in commit messages (caught my own violation in PR #1955 — the dogfood moment). This PR closes the remaining gate gaps on PR titles, PR bodies, and code comments.

🎚 Gate matrix — before vs after

SurfaceBefore this PRAfter this PREnforcement
Commit messages ✅ blocked (pre-commit) ✅ blocked (pre-commit) git hook
PR titles ❌ ungated ✅ blocked (CI) GHA workflow
PR bodies ❌ ungated ✅ vocab-only (CI) GHA workflow
Code comments ❌ ungated ⚠ warned (advisory) PostToolUse hook
SKILL.md headings ✅ vocab-only by convention ✅ vocab-only by convention rule doc + ascii-lint

📐 Severity choices

BLOCK · PR titles + bodies (CI hard fail)

Public surface, hard to retroactively fix. Title emoji ban is absolute per visual-style.md. Body emoji limited to the closed 12-glyph vocabulary — decorative glyphs (🎉 🚀 ✨ 🎊…) fail.

Bypass: visual-style-override label (mirror of release-please-override pattern).

WARN · Code comments (advisory, never blocks)

Lower stakes — reviewer can catch in PR review. Aggressive blocking here would friction-bomb the dev loop. The PostToolUse hook emits a single advisory line when an Edit/Write puts a non-vocab glyph in a comment of a code file.

Bypass: none needed — the hook never blocks.

SKIP · Bot PRs

dependabot[bot], release-please[bot], github-actions[bot], orchestkit-release-bot[bot], and branches matching ^(release-please|chore/cc-snapshot-|dependabot/) all skip the CI gate. Bots produce predictable content; gating them adds zero value.

🧪 Examples

Title checks

PR title:  "feat: 🎉 ship the auth flow"
                  ^^ blocked — title contains emoji
PR title:  "feat: ship the auth flow"
                     ✓ clean

Body checks

PR body:
  ## Summary
  🚀 Launching the rocket. Sparkles ✨ everywhere.

                ^^      ^^ blocked — 🚀 and ✨ outside vocab
PR body:
  ## Summary
  ✅ Tests pass · ⚠ One regression flagged · 📜 Docs updated

                  ✓ all glyphs in vocab

Code comment checks (advisory)

// 🎉 Yay we did it
            ^^ warns: 🎉 outside vocab
// ✅ This check passes
   ✓ ✅ is in vocab

📦 PR contents

FileStatusPurpose
.github/workflows/visual-style-lint.ymlNEWCI gate for PR title + body
src/hooks/src/posttool/code-comment-glyph-warn.tsNEWAdvisory hook for code comments
src/hooks/src/entries/posttool.tsMODRegister the new hook
src/hooks/hooks.jsonMODRegister + bump count 139→140
src/hooks/src/__tests__/posttool/code-comment-glyph-warn.test.tsNEW10 unit tests covering all paths
CLAUDE.mdMODVisuals section mentions the new gate

✅ Verification