Built this after the kernel's Assisted-by: tag policy landed earlier this year. Three numbers I wanted to see:

  - by commits: 166 of 26,044 mainline commits since 2026-01-01 (0.64%)
  - by new code: 3,304 of 1,130,805 lines added (0.29%)
  - against the entire 42.5M-line kernel: 78 parts per million

Methodology in detail at the bottom of the page. Submitted side comes from `lei q -d mid -f mboxrd 'b:"Assisted-by:" AND d:20260101..'` against lore.kernel.org/all, with v1/v2/v3 respins collapsed and bots filtered. Merged side is git log on a fresh shallow clone since 2026-01-01. Kernel-wide line totals from the same clone, with 245 shallow-boundary phantom commits filtered (they show as 90k-files-changed diffs against missing parents).

Source: https://github.com/snek-git/assisted-by

Built with Claude Code.

Three things I deliberately don't show, with reasons documented: merge rate per vendor (different humans use different tools for different patch types, the ratio is not a model quality signal), motivation behind any specific tag string, and patches that landed without disclosure (this measures policy compliance, not actual AI usage).