Haskell 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 Haskell repos on public GitHub, 862 PRs carried an agent mark between 2026-05 window start and end, which is 11.4% of all Haskell 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
862
Agent-marked PRs
Latest month window
11.4%
Of all Haskell PRs
7,589 total in window
Claude Code
Does the most Haskell
57% of agent-marked PRs
16
Months tracked
Updated monthly
Who Does The Haskell Work
Agent-marked PRs in Haskell repos, latest month. Counts link to the live GitHub search.
Haskell Over Time
Agent-marked Haskell PRs per month by agent, or each agent's share of them.