v0.1.0

Does AI-written code get rewritten faster? aichurn replays a repository's git history line by line and splits two-week churn, copy/paste and moved code between AI-assisted and human commits.

aichurn denoland/deno

Install

Download a binary below, or cargo install --git https://github.com/celaldrg/aichurn --tag v0.1.0.

What's in v0.1.0

• aichurn [path | owner/repo | url]: replays first-parent history and tracks the birth time of every line
• Two-week churn: share of new lines rewritten or deleted within 14 days (--window to change)
• Copy/paste: share of new lines inside a 6-line block that already existed in the repo
• Moved code: share of added lines that were moved within the same commit
• AI-assisted vs human split for every metric, from self-declared signatures of 14 agents (Claude Code, Cursor, Copilot, Codex, Aider, Devin, Jules, Gemini, Amp, opencode, Factory, Windsurf, Lovable, v0); merged branches pass their agent to the merge commit
• Per-quarter or per-month table (--by), churn sparkline, partial periods marked
• Bot commits and bulk commits (--max-commit-lines) are replayed but not counted; lockfiles, docs, data and generated files are excluded (--all-files to include)
• Remote repos are cloned shallowly back to --since (default 2 years)
• Outputs: terminal, --json, --markdown, --card (SVG report card), --badge (SVG badge); --fail-above CI gate
• AICHURN_VERIFY=1 self-check of the replay against the real files
• Rust standard library only; prebuilt binaries for Linux, macOS and Windows

Results on 13 public repos are in the README.