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Roman Gushchin, a Linux kernel engineer at Google, has introduced Sashiko, an AI-powered code review tool written in Rust for the Linux kernel. It ingests patches from mailing lists, analyzes them, and provides feedback to maintainers. In testing against 1,000 recent upstream bugs, Sashiko found 53% of issues — all of which had been missed by human reviewers. The tool supports multiple LLMs (primarily tested with Gemini Pro 3.1) and sends code to external providers, with Google covering costs for the Linux Kernel Mailing List. Sashiko is now under the Linux Foundation and is positioned as a maintainer aid rather than an AI code submission tool, making it less controversial in the open source community.

Linux kernel engineer introduces Sashiko code review system