Sashiko is a new agentic system designed to automate code review for the Linux kernel. It scans public mailing lists like LKML, acting as a specialized team of reviewers checking everything from high-level architecture to low-level concurrency. Google funds the compute and LLM tokens for this open-source project hosted by the Linux Foundation. The system uses a combination of open-source prompts and a custom multi-stage protocol to identify bugs, achieving a 53.6% success rate in tests with Gemini 3.1 Pro on historical commits that passed human reviews. 53.6% of these bugs were previously missed by human reviewers.

While probabilistic and designed to augment, not replace, human reviewers, Sashiko offers a significant boost to kernel security and quality. The project is publicly available on GitHub.