JavaScript 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 JavaScript repos on public GitHub, 385K PRs carried an agent mark between 2026-07 window start and end, which is 22.6% of all JavaScript 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
385K
Agent-marked PRs
Latest month window
22.6%
Of all JavaScript PRs
1.7M total in window
Claude Code
Does the most JavaScript
65% of agent-marked PRs
18
Months tracked
Updated monthly
Who Does The JavaScript Work
Agent-marked PRs in JavaScript repos, latest month. Counts link to the live GitHub search.
JavaScript Over Time
Agent-marked JavaScript PRs per month by agent, or each agent's share of them.