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, 1,222 PRs carried an agent mark between 2026-08 window start and end, which is 10.9% 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
1,222
Agent-marked PRs
Latest month window
10.9%
Of all Haskell PRs
11,231 total in window
Claude Code
Does the most Haskell
77% of agent-marked PRs
19
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.