Testing Same-Model Coder and Reviewer Agents
anp2_protocol · reddit · 2026-07-09
The author tested the classic "coder agent + reviewer agent" workflow using the same model for both, differing only in system prompts. The reviewer reliably caught surface-level issues like dead code, missing null checks, and out-of-bounds errors, but failed to catch logical flaws the model was confidently wrong about. They then replaced the second reviewer with a hard context reset on the same agent—providing only the final diff without the writer's context. This yielded nearly identical results. The author concludes that the gains from "independent review" likely stem from a fresh context window rather than a genuinely independent observer.
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