Dataset: 2026-09-18-v3.0
Ruleset: b2e8889c66f7
Scanned: 2026-09-16
Window: February–September 15, 2026

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01Result

dotnet/roslyn ↗

dotnet/roslyn AI coding statistics: 22.9%

of 2,841 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate

22.9% agent · top contributor 39.3%37 contributors

org-wide

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

651

agent commits

2,190

other considered commits

agent contributors

39.3%

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

583assisted

68autonomous

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. Across the whole index, 96% of agent commits are assisted.

Agent share by month

Agent-attributed commit share by month
Month	Agent share	Considered commits
2026-01	0%	3
2026-02	6.5%	275
2026-03	10.9%	368
2026-04	17.6%	369
2026-05	33.2%	545
2026-06	24.7%	519
2026-07	26.7%	255
2026-08	31.9%	386
2026-09	23.1%	121

Peak month: 33.2%. Bars are scaled to that peak, not to 100%.

Which agents

Agent	Vendor	Commits	Share
GitHub Copilot	GitHub	643	22.6%
Claude Code	Anthropic	5	0.2%
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

2e953c46 on GitHubFix broken relative links in integration-test-analysis SKILL.md (#85293)GitHub Copilot
0a1187ca on GitHubRemove team specific ExternalAccess assemblies (#85135)GitHub Copilot
4af55b27 on GitHubMake CI test payload artifacts retry-safe (#85248)GitHub Copilot
20d29497 on GitHubLet F# take part in the Navigate To search that runs while the solution loClaude Code
e47c73cb on GitHubLet F# create a workspace project context without blocking the main threadClaude Code
9a38b298 on GitHubEmbed F# external access resources under the name their accessor asks for Claude Code
74d07c07 on GitHubTighten fuzzy edit-distance threshold for length-5 patterns (#82459)Cursor Agent
a80bb709 on GitHubImprove nav-to fuzzy pre-filtering with q-gram bigram bitset and correctedCursor Agent
31befaa8 on GitHubImprove navigate-to filtering to avoid scanning documents unnecessarily. (Cursor 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	3,581
Merge commits removed	−628
CI / dependency bots removed	−112
Considered	2,841

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

05Provenance

Pinned to a source state

This observation names the repository state, release, and detector that produced it. Use these identifiers when reproducing or citing the result.

Dataset release: 2026-09-18-v3.0
Scan date: 2026-09-16
Ruleset: sha256:b2e8889c66f72c18a61839f0bf1a9f77b5481ba2def044dba33c797b2f2bdcae
Canonical repository: dotnet/roslyn
Default branch: main
Resolved HEAD: dc837b145342723b197e3d5639029ae82d861103 ↗
Resolved: 2026-09-16
Measurement window: February–September 15, 2026

Download observation JSONDeterministic export · same values as this page

06Peer context

Position among comparable repositories

The cohort uses the same release and measurement window, then narrows to the repository’s ecosystem and removes low-activity observations.

CohortC# · 21 eligible repositories · at least 100 considered commits2026-09-18-v3.0 · February–September 15, 2026 · 10 of 31 ecosystem repositories excluded

Agent-commit share position74th percentile

Midrank percentile; equal shares split the tied positions.

Repository: 22.9%
Cohort median: 2.1%
Share rank: 6 / 21

0th50th100th

Percentile = (repositories below + half of 1 tied repository) ÷ 21.

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 →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 dotnet/roslyn

Scan another repository

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