Add multi-agent delegation documentation to Manager system prompt so
Claude knows it can spawn child agents via the Agent tool. Also inject
CLAUDE_CODE_EXPERIMENTAL_AGENT_TEAMS=1 env var for Manager agents.
Reviewer workflow in agent-prompts.ts (8-step process), Rust auto-post
to #review-queue on task->review transition, reviewQueueDepth in
attention scoring (10pts/task cap 50), Tasks tab for reviewer in
ProjectBox with 10s queue polling. 7 vitest + 4 cargo tests.