15.8%

of 791 commits were committed by an AI agent — a floor, not an estimate

15.8% agent · top contributor 65.6%24 contributors

team

A small group is using agents. Adoption has spread beyond one person but is not project-wide.

125

agent commits

666

human commits

agent contributors

65.6%

largest contributor

Assisted or autonomous

124assisted

1autonomous

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: 43.6%. Bars are scaled to that peak, not to 100%.

Which agents

Claude Code	Anthropic	117	14.8%
Cursor Agent	Anysphere	7	0.9%
GitHub Copilot	GitHub	2	0.3%

Verify it yourself

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

22739592Og/continue protobuf nesting depth limit (#26099)Claude Code
240440f8feat(kubernetes_logs source): add truncate option for oversized events (#2Claude Code
3a8ff2a5fix(codecs): accept short-form syslog severity keywords in encoder (#25731Claude Code
0213e1f7feat(aggregate transform): Add support for event timestamp-based aggregatiCursor Agent
73990ee5feat(remap, codecs): add `auto` value to `metric_tag_values` (#25376)Cursor Agent
80e5720cchore(dev): honor CARGO_TARGET_DIR when generating component docs (#25980)Cursor Agent
0f80fafechore(azure sinks): refactor Blob code out of azure_common (#25689)GitHub Copilot
6724b0a8chore(deps): Update num-bigint-dig 0.8.4 -> 0.8.6 to resolve future incompGitHub Copilot

What was excluded

Commits in window	954
Merge commits removed	−0
CI / dependency bots removed	−163
Considered	791

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 vectordotdev/vector

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