Trail of Bits open-sources patching-bugs and regression-hunt agent plugins, cuts regression false positives 25%
JiaweiLiu_ · x · 2026-11-14
Trail of Bits released two open-source agent plugins, patching-bugs and regression-hunt, encoding lessons from hundreds of Patch the Planet patches and thousands of internal Codex sessions.
- patching-bugs makes an agent prove each fix: the original code fails, the patched code passes, and a full revert fails again.
- regression-hunt checks what else a change broke, providing a live proof-of-concept for every regression; in preliminary evals it produces 25% fewer false positives than a baseline Codex agent prompted to review PRs.
Built from their joint Patch the Planet initiative with OpenAI. A review of 130+ merged PRs confirmed 21 regressions (16 functional, 1 performance, 4 build/test), none breaking security protections. Maintainers can inject their own security assumptions so agents work within project rules.
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