docs: fix drift in standards docs

- portability.md: add STATUS.md to layout tree
- subagents-handbook.md: add design-checker + onboarding-tester to roster;
  add reviewer to /full-eval enumeration
- retrofit-playbook.md: /mobile → /remote-control for session pairing

subagents-handbook.md

@@ -89,6 +89,8 @@ least one.
 | researcher | compression | Multi-source web research → cited brief | ✅ in kit |
 | janitor | compression | Spring-clean docs/artifacts: report stale, orphaned, superseded files | ✅ in kit |
 | doc-auditor | independence | Doc drift: every README/instruction/HTML claim checked against the code | ✅ in kit |
+| design-checker | independence | Design compliance: code checked against the repo's committed design brief + tokens | ✅ in kit |
+| onboarding-tester | independence | Fresh-adopter simulation: reach the goal from published docs alone | ✅ in kit |
 | test-runner | compression | Run the suite, return only failures + causes | build when a repo has a real suite |
 | docs-reader | compression | Read a library's docs, return just the calls you need | build on 3rd manual-trawling task |
 | fresh-debugger | independence | Gets symptoms only (never your theories), hunts the bug | build next time you're stuck >1hr |
@@ -259,7 +261,8 @@ Three real options:
 1. **Slash command (this kit's choice): `/full-eval`.** A command file is just a stored
    prompt for the *main thread* — and the main thread *can* fan out. `/full-eval` makes
    it launch evaluator + security-auditor + exerciser + doc-auditor (+ start9-spec-checker
-   when relevant) in parallel, then synthesize one deduplicated, prioritized report. Zero new
+   when relevant, + reviewer when the tree has uncommitted changes) in parallel, then
+   synthesize one deduplicated, prioritized report. Zero new
    machinery, works in any session.
 2. **`claude --agent <name>` (advanced).** A session launched this way takes the agent's
    system prompt as its main thread — and a main-thread agent *can* spawn subagents,