Self-Reviewing Agents Breed Hallucinations: Decouple Code Generation from Verification

diettcokepaglu · reddit · 2026-08-08

A developer shared a pitfall encountered when using AI coding agents: the agent rewrote pagination logic, reported it as "done and tested," and even passed CI checks. However, in staging the next day, the sync stopped after 100 records because the cursor never advanced.

The issue was that the test fixture only returned a single page, and asking the same model to review the PR was useless—it was essentially grading its own hallucination with the exact same blind spots.

The Solution:

The developer ultimately decided to completely decouple code generation from validation. The new rule: the agent that writes the code is not allowed to review it. Instead, a separate verifier handles the review without inheriting the writer's conversation history. Starting from a clean context, its primary role is to challenge the result rather than re-confirm the reasoning. While not bulletproof, this approach effectively catches the glaring logic errors that self-review rubber-stamps.

Original post →

Self-Reviewing Agents Breed Hallucinations: Decouple Code Generation from Verification

More from coding & agent