Synod AI Code Reviewer Gains Semgrep Pre-Filter, Hits 100% Consistent Accuracy

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Synod, an open-source multi-agent code review tool built for the Global AI Hackathon Series with Qwen Cloud, has received a notable update adding a Semgrep deterministic pre-filter ahead of its LLM-based security agent. Previously, the system relied solely on language models, which produced inconsistent results ranging from 0 to 75% recall across runs despite averaging 75%. After adding Semgrep as a baseline scanning layer, the combined council achieved 100% precision, recall, and F1 score consistently across all benchmark runs. The developer noted that the key improvement was not raw accuracy but the elimination of variance caused by LLM non-determinism. The update also introduced a GitHub webhook feature that allows Synod to automatically review pull request diffs and post comments.

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