Dataset: 2026-10-27-catalog-ai-v2
Ruleset: b2e8889c66f7
Scanned: 2026-10-27
Window: February–September 15, 2026

Catalog tracking observation. This repository is measured with the same fixed window and ruleset, but it is not part of the published benchmark or its aggregate claims.

Apache DataFusion SQL Query Engine

01Result

apache/datafusion ↗

apache/datafusion AI coding statistics: 11.1%

of 2,066 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate

11.1% agent · top contributor 37.4%58 contributors

org-wide

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

230

agent commits

1,836

other considered commits

agent contributors

37.4%

largest contributor

02Drivers

What shapes this result

Mode, timing, and detected signatures show whether the result reflects broad adoption or one concentrated workflow.

Assisted or autonomous

230assisted

0autonomous

Assisted — a developer’s identity authored the commit and the agent added itself as co-author. Autonomous — a bot identity authored the commit without a human identity attached.

Agent share by month

Peak month: 18.1%. Bars are scaled to that peak, not to 100%.

Which agents

Agent	Vendor	Commits	Share
Claude Code	Anthropic	219	10.6%
GitHub Copilot	GitHub	8	0.4%
Cursor Agent	Anysphere	3	0.1%

03Evidence

Inspect the matches

Public commit samples let you inspect the signatures behind the aggregate result.

Matched commit samples

98d84121 on GitHubfix: return an error for an invalid CSV null_regex instead of panicking (#Claude Code
afaee3d4 on GitHubdev: include Markdown link checks in the local lint suite (#25287)Claude Code
d9646f49 on GitHubci: share extended test commands through xtask (#25256)Claude Code
11caa4c1 on GitHubAdd clickbench SQL benchmark (#22633)GitHub Copilot
d54ce656 on GitHubperf: optimize arrays_zip perfect list zips (#22285)GitHub Copilot
857eb4a6 on GitHubMigrate UnKnownColumn proto hooks (#22464)GitHub Copilot
8332cfaf on GitHubtest: add range-partitioned sorted time-bin aggregation coverage (#24500)Cursor Agent
93834e1e on GitHubRevise example usage section headings (#22909)Cursor Agent
1fd29c93 on GitHubSkip loading Parquet page index when row-group statistics already prove itCursor Agent

04Method

What entered the denominator

The result begins with commit history, removes merges and routine automation, and reports literal agent signatures as a lower bound.

Exclusion ledger

Commits in window	2,294
Merge commits removed	−0
CI / dependency bots removed	−228
Considered	2,066

Bots are excluded from the denominator entirely. Agent attribution requires a literal supported signature; no code-style inference is used.

Continue exploring

Claude Code commitsBrowse repositories with detected Claude Code signatures →GitHub Copilot commitsBrowse repositories with detected GitHub Copilot signatures →Cursor Agent commitsBrowse repositories with detected Cursor Agent signatures →Rust AI coding statisticsCompare evidence across Rust repositories →GitHub AI commit analyzerInspect another repository with the same evidence model →

Reproduce this observation

Run the same detector locally.

Deterministic signature matching; no code-style inference. Squash merges can remove trailers, so this result remains a measured floor.

npx qmmit-cli apache/datafusion

Scan another repository

Try

Month	Agent share	Considered commits
2026-02	8%	188
2026-03	8.3%	252
2026-04	9.1%	263
2026-05	18.1%	249
2026-06	9.5%	242
2026-07	9.4%	319
2026-08	13.7%	351
2026-09	11.9%	202