feat(skills): add registry doctor diagnostics and docs

docs/plans/2026-02-16-clawhub-registry-checklist.md

@@ -95,11 +95,11 @@ Tests:
 
 Checklist:
 
-- [ ] Update `README.md` skills section with registry usage.
-- [ ] Update `docs/security/SAFE_PERSONAL_AGENT.md` with registry trust model.
-- [ ] Add doctor diagnostics:
-  - [ ] registry source reachable/parsible
-  - [ ] clear warning when registry disabled/unconfigured
+- [x] Update `README.md` skills section with registry usage.
+- [x] Update `docs/security/SAFE_PERSONAL_AGENT.md` with registry trust model.
+- [x] Add doctor diagnostics:
+  - [x] registry source reachable/parsible
+  - [x] clear warning when registry disabled/unconfigured
 
 Acceptance:
 
@@ -107,17 +107,17 @@ Acceptance:
 
 Tests:
 
-- [ ] Doctor tests for registry health reporting.
+- [x] Doctor tests for registry health reporting.
 
 ## Security Guardrails
 
-- [ ] Registry metadata is never treated as trusted code.
-- [ ] Skill scanner remains mandatory before skill becomes available.
-- [ ] Prompt injection and symlink/binary checks still gate registry-installed skills.
-- [ ] Secrets are never accepted from registry metadata.
+- [x] Registry metadata is never treated as trusted code.
+- [x] Skill scanner remains mandatory before skill becomes available.
+- [x] Prompt injection and symlink/binary checks still gate registry-installed skills.
+- [x] Secrets are never accepted from registry metadata.
 
 ## Final Validation
 
-- [ ] `pnpm typecheck`
+- [x] `pnpm typecheck`
 - [ ] `pnpm test:run`
 - [ ] Update `docs/plans/state.json` to `completed` with summary + test status once all phases land.