Ruby Coding AgentsPreviewThis index is in active development: we are still adding agents, refining attribution signatures, and verifying data against sources. The date in the header is when key figures were last re-checked. Numbers can move as coverage improves.
In Ruby repos on public GitHub, 15,635 PRs carried an agent mark between 2026-08 window start and end, which is 9.2% of all Ruby PRs. Claude Code does the most of it.
Coverage: tracks Claude Code, Codex, Copilot agent, Cursor, Devin, and Jules. Codex is measured through hosted task metadata, checked against sampled PRs. Gemini CLI and other terminal agents work through the developer's own identity, leaving nothing public we can detect yet, so they cannot be measured here. We are expanding coverage. Methodology
15,635
Agent-marked PRs
Latest month window
9.2%
Of all Ruby PRs
170K total in window
Claude Code
Does the most Ruby
69% of agent-marked PRs
19
Months tracked
Updated monthly
Who Does The Ruby Work
Agent-marked PRs in Ruby repos, latest month. Counts link to the live GitHub search.
Ruby Over Time
Agent-marked Ruby PRs per month by agent, or each agent's share of them.