87.9%

of 1,832 commits were committed by an AI agent — a floor, not an estimate

87.9% agent · top contributor 55.8%59 contributors

team

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

1,611

agent commits

221

human commits

agent contributors

55.8%

largest contributor

Assisted or autonomous

701assisted

910autonomous

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: 93.8%. Bars are scaled to that peak, not to 100%.

Which agents

Devin	Cognition	1523	83.1%
Claude Code	Anthropic	118	6.4%
Cursor Agent	Anysphere	8	0.4%
GitHub Copilot	GitHub	5	0.3%

Verify it yourself

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

4a63ae27chore(destination-clickhouse): bump to `2.1.30` to republish Cloud spec (#Devin
d5fbdb89chore(destination-postgres): bump to `3.0.21` to republish Cloud spec (#86Devin
1db877fcchore(destination-dev-null): bump to `0.9.5` to republish Cloud spec (#863Devin
8c39f5f7feat(destination-s3-data-lake): add normalize_column_names option (#85827)Claude Code
7c9cd920feat(source-goldcast)!: 🚨🚨 make `event_members` `props` schemaless to stClaude Code
9e6367eefeat(source-linkedin-ads): add videos stream (#81509)Claude Code
3b888dcefeat(source-reprise): contribution from Ella6882 (#84883)Cursor Agent
a6e2c7cefix(source-reddit-ads): stop refreshing OAuth token on every request (#832Cursor Agent
c408d227feat: source-mntn contribution from Ella6882 (#81334)Cursor Agent
cbed660cdocs: document Cloud managed region IDs for API and Terraform (#84868)GitHub Copilot
77e33a1cfeat(source-jira): add OAuth 2.0 authentication support (#76067)GitHub Copilot
d8b74dfcci: no op workflow (#77527)GitHub Copilot

What was excluded

Commits in window	9,626
Merge commits removed	−0
CI / dependency bots removed	−7,794
Considered	1,832

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 airbytehq/airbyte

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