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JetBrains/kotlin ↗
4.7%
of 9,828 commits were committed by an AI agent — a floor, not an estimate
4.7% agent · top contributor 39.7%18 contributors
org-wide

Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.

461
agent commits
9,367
human commits
18
agent contributors
39.7%
largest contributor

Assisted or autonomous

461assisted
0autonomous

Assisted — a developer’s identity authored the commit and the agent added itself as co-author. The agent ran git commit during a working session, with a person there. Autonomous — a bot identity is the author, no human in the loop. Across the whole index, 93.7% of agent commits are assisted.

Agent share by month

Feb26
Mar26
Apr26
May26
Jun26
Jul26
Aug26
Sep26

Peak month: 7.3%. Bars are scaled to that peak, not to 100%.

Which agents

Claude CodeAnthropic4614.7%

Verify it yourself

Sample commits that matched. Every one links to GitHub — check the trailers.

  • a4c364ef[LL] Don't resolve the designation path for a checker contextClaude Code
  • 7ddcdb1b[FIR] Don't traverse into an unresolved container in the CFA componentClaude Code
  • 19f15deb[FIR] Don't analyze a member graph its container graph coversClaude Code

What was excluded

Commits in window9,838
Merge commits removed−0
CI / dependency bots removed−10
Considered9,828

Bots are excluded from the denominator entirely. Counting dependabot as “AI-written code” is the fastest way to produce a meaningless number.

How this was measured

Measured over February–August 2026, cloned directly. Detection is deterministic string matching against signatures agents write about themselves — no heuristics, no style analysis. Merge commits and CI bots are excluded from the denominator. The figure is a floor: squash merges strip trailers, so real usage is higher. Contributor counts are aggregate — no individual is named.

Run it yourself: npx qmmit-cli JetBrains/kotlin

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