Adds crewli-architect, backend/frontend-implementer, test-writer subagents,
the /build-module orchestrator command, the PR merge-gate template, and a
permissions allow-list in settings.json. Documents the layer as
CLAUDE_CODE_TOOLING.md section 10. Implementer Edit/Write is allow-listed;
git push deliberately omitted so merge/push stay human.
Co-Authored-By: Claude <noreply@anthropic.com>
Isolated-context code review against the zero-compromise principles.
Read/Grep/Glob/Bash only — no Edit, so the reviewer cannot patch
code. Outputs MUST FIX / SHOULD FIX / CONSIDER, every finding cited
as path:line.
