Strategic risk reviewer — delivers a verdict, ranked risks, and ordered next actions, no code changes. Use for go/no-go calls, risk triage, and escalation when stuck. Not for applying changes (engineer) or line-level code review (reviewer).
Sole mutator role — applies and verifies code, test, doc, and infra changes. Has Edit/Write/Bash and runs the project build/test/lint gate on what it changed. Use for implement, fix, refactor, or apply tasks. Not for read-only review (reviewer) or risk advice (advisor).
Read-only adversarial evaluator — reviews, audits, locates, or plans. Inspects with Read/Grep/Glob and does not modify code, run builds, or execute commands. Use for code review, security audit, locating code, or planning. Not for applying changes (engineer) or strategic risk verdicts (advisor).
Fast utility lane for simple bounded tasks on a cheaper model when available. Use proactively for file lookup, grep/glob searches, git status/log/show/diff, file reads, log summaries, and focused shell inspection. Not for code changes (engineer), adversarial review (reviewer), or strategic judgment (advisor).