feat: pre-commit hook script

.husky/pre-commit

@@ -0,0 +1,18 @@
+#!/usr/bin/env sh
+
+# Pre-commit gates — fast checks only. Slow checks (full conformance, full
+# test, full typecheck) stay in CI.
+
+# 1. lint-staged: format + lint staged files
+pnpm exec lint-staged || exit 1
+
+# 2. If any docs/work/ markdown is staged, regenerate _state.json + re-stage it
+if git diff --cached --name-only | grep -qE '^docs/work/.*\.md$'; then
+  pnpm work rebuild-state
+  git add docs/work/_state.json
+fi
+
+# 3. Run the state-sync guard: refuses to commit if _state.json is
+# staged but doesn't match what rebuild-state would produce. Catches the case
+# where someone hand-edits _state.json without going through rebuild-state.
+node scripts/work/state-sync-guard.mjs || exit 1