trace

# Trace Root cause, not symptom. Never patch over a bug without understanding why it happened. Dispatcher and reviewer — Opus 4.8 (thinking-tier). Implementer/Searcher/Writer — Sonnet 4.6. ## Per-Step Agent Map (DOCTRINE rule 12) Every substantive step dispatches at least one Agent. Atomic steps (per DOCTRINE 12.2.8) are a single Worker → Reviewer pair with no independent angles to fan out. | Step | Status | Worker tier | Thinking tier | Notes | |---|---|---|---|---| | 1 — Reproduce | Atomic (12.2.8) | Searcher (Sonnet) | **Reviewer** (Opus) | Runs if repro missing; single Worker→Reviewer pair | | 2 — Gather evidence | Atomic (12.2.8) | Searcher × 3 (Sonnet) | **Reviewer** (Opus) | 3 parallel Searchers → single Reviewer; one Worker-group→Reviewer pair | | 3 — Hypothesize | Atomic (12.2.8) | **Debugger** (Opus) | **Reviewer** (Opus) | Single Debugger (5 Whys + ranked hypotheses in one pass) → Reviewer | | 4 — Verify | 2 sub-phases | Implementer × N (Sonnet) | **Debugger** (Opus) · **Reviewer** (Sonnet) | 4a: parallel Implementers → Sonnet Reviewer; 4b: Debugger re-evaluation → Reviewer | | 5 — Fix at root | Atomic (12.2.8) | Implementer × N (Sonnet) | **Reviewer** (Opus) | N Implementers (one per file) → Opus Reviewer; single Worker-group→Reviewer pair | | 6 — Regression test | Atomic (12.2.8) | Writer (Sonnet) | **Reviewer** (Opus) | Single Writer → single Reviewer; no parallel angle | | 7 — Memory + final | Atomic (12.2.8) | Writer (Sonnet) | **Reviewer** (Opus) | Singl...