- Dataset
- 2026-10-27-catalog-ai-v2
- Ruleset
- b2e8889c66f7
- Scanned
- 2026-10-27
- Window
- February–September 15, 2026
The Microsoft Build Engine (MSBuild) is the build platform for .NET and Visual Studio.
01Result
dotnet/msbuild ↗dotnet/msbuild AI coding statistics: 41.5%
Adoption is broad. Many contributors are committing agent-authored work, which is what a real organisational rollout looks like.
02Drivers
What shapes this result
Mode, timing, and detected signatures show whether the result reflects broad adoption or one concentrated workflow.
Assisted or autonomous
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
| Month | Agent share | Considered commits |
|---|---|---|
| 2026-02 | 12.6% | 207 |
| 2026-03 | 45.2% | 73 |
| 2026-04 | 21.4% | 117 |
| 2026-05 | 45.4% | 130 |
| 2026-06 | 59.3% | 108 |
| 2026-07 | 70.2% | 114 |
| 2026-08 | 53.5% | 71 |
| 2026-09 | 87.9% | 33 |
Peak month: 87.9%. Bars are scaled to that peak, not to 100%.
Which agents
| Agent | Vendor | Commits | Share |
|---|---|---|---|
| GitHub Copilot | GitHub | 353 | 41.4% |
| Claude Code | Anthropic | 1 | 0.1% |
03Evidence
Inspect the matches
Public commit samples let you inspect the signatures behind the aggregate result.
Matched commit samples
081bc5e1on GitHubReduce binary logger serialization overhead (#14929)GitHub Copilotb3c03df8on GitHubOwn sidecar TaskHosts so they cannot outlive their owner (#14584)GitHub Copilot82c81ee5on GitHubRevert flaky server-only debugging tests (#15028)GitHub Copilotbf5e076con GitHubFix quoting in eng/build.sh (#14506)Claude Code
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 | 1,177 |
| Merge commits removed | −143 |
| CI / dependency bots removed | −181 |
| Considered | 853 |
Bots are excluded from the denominator entirely. Agent attribution requires a literal supported signature; no code-style inference is used.
Continue exploring
Related coding-agent evidence
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/msbuild