Context

AgDR-0001 captured the design decisions for the 4 rule-mechanization hooks shipped in #13, but the full audit table — every MUST across all rule files with its mechanization status (mechanized / advisory / deferred) — was explicitly deferred.

This ticket produces that table as a standalone artifact at `docs/rule-audit.md`. Pure documentation, no hook work.

Acceptance Criteria

• `docs/rule-audit.md` lists every MUST / NEVER / HARD-STOP rule from:
  • `CLAUDE.md`
  • `.claude/rules/*.md` (all 8 rule files — agdr-decisions, code-standards, git-conventions, pr-quality, pr-workflow, role-triggers, ticket-vocabulary, workflow-gates)
  • `workflows/*.md` (sdlc, code-review, deployment)
• Each row has columns: rule (short name), source file + section, currently-enforced-by (hook filename / "prose"), mechanizable? (yes / no / deferred), proposed hook (for mechanizable-but-not-yet) OR reason advisory (for "no").
• Rules that are advisory by design (e.g. "testing pyramid 70/20/10", "not Friday afternoon") are explicitly marked "advisory — not mechanizable in a shell harness" or similar.
• Rules that are deferred to future tickets link to those tickets.
• CLAUDE.md "Quick Reference" table adds a link to the audit.
• Table entries are short (one-liner each), reasoning goes in footnotes or linked AgDRs.

Non-goals

• Does NOT add new hooks. This is pure documentation.
• Does NOT change any existing rule files.
• Does NOT fold into AgDR-0001 — that AgDR is historical and should not be rewritten.

Links

• AgDR-0001 (the design reasoning this doc will reference): `docs/agdr/AgDR-0001-rule-mechanization-hooks.md`
• Root-cause ticket: [Chore] audit CLAUDE.md and mechanize MUST rules into hooks #13 (closed)