Periodic repository cleanup sweep (Tierward repo variant) - finds orphaned/merged git branches, orphaned worktrees and unregistered worktree directories, stale `.claude/session/*.md` files, stale `.claude/initiatives/*.md` files, and (target:full / target:reviews) orphaned documentation and stale `docs/reviews/` snapshots (archive-only moves, never deletion). Reports every finding with evidence, then executes only the branches/worktrees/session-files the user explicitly confirms via a single AskUserQuestion batch. Never deletes docs/*.md itself - those are always report-only, evidence-based, human-decided. Distinct from the Phase 8 cleanup gate (which tears down one specific block at closure) - this is the periodic sweep that catches what block-by-block cleanup misses.
Unified accessibility audit - axe-core WCAG 2.2 scan, APCA contrast measurement, static a11y checks (aria-label, tabindex, form labels, focus visibility, onClick on non-interactive). Static and live modes.
Performance audit: bundle size, lazy loading, data fetching, caching, N+1 queries, image optimization. Native mode checks memory, I/O, launch weight, energy.
Responsive audit: test pages at 375/768/1024px breakpoints via Playwright. Checks overflow, tap targets, sidebar collapse, text reflow, WCAG 1.4.4 zoom.
Security audit: auth/authz on API routes, input validation, row-level access control (RLS in Postgres, ORM scopes or app-level guards elsewhere), response shape review, secret exposure, HTTP headers. Native mode checks entitlements and Keychain. MCP-aware (v1.20+): when `mcp-nvd` server is wired, Step 3c queries live CVE data instead of static `npm audit` / `pip-audit` snapshots; falls back to local audit commands when MCP unreachable.
Database audit: schema quality, index coverage, row-level access-control completeness, FK cascades, query patterns. Runs live SQL verification (PostgreSQL instance in PATTERNS.md; other engines verify the equivalent guard). Migration file safety → /migration-audit.
Code quality audit: detect cross-module coupling, N+1 queries, dead exports, antipatterns, over-large components. Cross-checks against refactoring backlog.
Audit UI for design token compliance and component adoption. Static grep-based analysis against the sitemap's page and component files. Requires a design system with semantic tokens.