Pulse
2026-09-18-v3.0
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.

A high performance implementation of the Ruby programming language, built on GraalVM.

01Result

truffleruby/truffleruby ↗

truffleruby/truffleruby AI coding statistics: 9.7%

of 763 commits in February–September 15, 2026 were committed by an AI agent — a floor, not an estimate
9.7% agent · top contributor 89.2%4 contributors
individual

One person is driving this. The headline number reflects a single contributor's workflow, not a project-wide shift.

74
agent commits
689
other considered commits
4
agent contributors
89.2%
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

72assisted
2autonomous

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

Agent-attributed commit share by month
MonthAgent shareConsidered commits
2026-022.7%75
2026-031.6%123
2026-040%34
2026-050%147
2026-063.7%161
2026-070%70
2026-084.3%69
2026-0972.6%84

Peak month: 72.6%. Bars are scaled to that peak, not to 100%.

Which agents

AgentVendorCommitsShare
Claude CodeAnthropic658.5%
OpenAI CodexOpenAI60.8%
GitHub CopilotGitHub30.4%

03Evidence

Inspect the matches

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

Matched commit samples

  • aabad786 on GitHubFix thread-safety of `ENV`.Claude Code
  • 19198460 on GitHubRead the process environment directly rather than caching it in Ruby.Claude Code
  • e6f152a1 on GitHubFix an internal error when an ENV variable name holds non-ASCII bytes in tClaude Code
  • 13959e91 on GitHubMigrate Truffle::POSIX native calls to FFM, reducing the overhead from ~10OpenAI Codex
  • 64539f5b on GitHubAdd specs for rb_catch_obj() and rb_proc_new() with raw pointersOpenAI Codex
  • e57c4dab on GitHubFix rb_iterate(), rb_exec_recursive() and rb_fiber_new() to pass the callbOpenAI Codex
  • 6ab8d536 on GitHubAdd AGENTS.mdGitHub Copilot
  • 9f028ec1 on GitHubAdd C API specs for rb_str_subpos, rb_str_sublen, rb_enc_check, rb_cloexecGitHub Copilot
  • 52fab813 on GitHubAdd support for Thread::Backtrace::Location in Exception#set_backtraceGitHub Copilot

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 window1,034
Merge commits removed−265
CI / dependency bots removed−6
Considered763

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 →OpenAI Codex commitsBrowse repositories with detected OpenAI Codex 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 truffleruby/truffleruby

Scan another repository

Try