Final review of the diff for correctness, security, conventions, and spec conformance. Waits for CI green. On clean verdict, appends one line to LEARNINGS.md and signals merge-ready. On blocking findings, emits HANDOFF:FIX to coder. Read-only on source code.
Diagnostic specialist — tries to break the proposed fix before it ships. Red-team the assumptions. Read-only investigator. Does NOT write fixes. Spawned by /brigade:bug-council or /brigade:fix on 3+ failed fix attempts.
Sprint planner — breaks a sprint goal into atomic task specs with file ownership, dependencies, and waves for parallel execution. Does NOT execute tasks and does NOT spawn worker agents. Use when: planning a new sprint, decomposing a goal into tasks, assigning waves. Triggers on: "plan sprint", "create task specs"…
Diagnostic specialist — finds similar bugs and similar patterns elsewhere in the codebase. If the same bug exists in 5 places, the fix should probably be systemic. Read-only. Spawned by /brigade:bug-council or /brigade:fix on 3+ failed fix attempts.