Tree rings for your codebase: see when AI shows up in git.
One ring per month since the first commit. Colour wherever the history itself discloses an AI co-author, an AI agent's own account, or a bot-named account.

Gallery of famous repos · Install · How it reads history · 中文

npx skills add vnmoorthy/rings -g      # then, in Claude Code or Codex: /rings

npx github:vnmoorthy/rings oven-sh/bun # or any owner/name, URL, or local path

No API keys, no dependencies (Node built-ins only), nothing uploaded. Remote repos are cloned history-only, so even large ones take seconds.

Rings cuts a repository open like a log. The pith is the first commit, the bark is today. Each ring is one month (one week, day or commit for younger repos) and its width comes from that month's commit count. Coloured arcs inside a ring show the share of that month's commits that carry a signal:

Hover a ring for its counts, agents, accounts and a sample commit hash. Export a 1080×1080 PNG or a 1200×630 social card from the page.

Numbers from each project's public history (non-merge commits on the default branch), read on 17 Oct 2026:

• microsoft/vscode: commits with an AI co-author trailer (almost all GitHub Copilot) went from 5% in Jan 2026 to 68% in Sep 2026.
• nodejs/node: commits with an Assisted-by line naming an AI tool (mostly opencode and Codex) rose from 11% in Jul 2026 to 36% in Sep 2026.
• neovim/neovim: 24% of September 2026's commits end with a plain AI-assisted line.
• oven-sh/bun: Claude co-author trailers peaked at 62% of commits in Feb 2026, while monthly commits grew from 175 in Mar to 1,042 in Aug 2026.
• Aider-AI/aider: aider's own repo, where aider-marked authors peaked at 62% of commits in Mar 2025.

Disclosure is not usage. Trailers change with tool defaults, squash merges and agents that commit under their own accounts. Rings shows what the history says and nothing more. See all repos →

As an Agent Skill (a folder with a SKILL.md; this repository is that folder):

Then ask: "ring this repo", "draw tree rings for vercel/next.js", or /rings.

As a plain CLI:

npx github:vnmoorthy/rings [repo] [options]

  repo              local path (default .), owner/name, or a GitHub URL
  -o, --out <file>  HTML to write (default ./<owner>-<name>-rings.html)
  --sessions        your own repo: mark commits made during local Claude Code / Codex sessions
  --unit <u>        auto | month | quarter | week | day | commit
  --bots a,b        extra automation accounts      --humans a,b   never count these as bots
  --ref <ref>       branch to read                 --json         machine-readable summary
  --open            open the page when done

• git log --no-merges on the default branch, author dates in UTC. Only commit metadata is read; remote repos are cloned with --filter=tree:0 into ~/.cache/rings.
• Trailers. A Co-authored-by line counts when it names a coding agent by its own display name or no-reply address (Claude <noreply@anthropic.com>, Cursor Agent <cursoragent@cursor.com>, copilot-swe-agent[bot] ...). Company domains are never enough (Bun's engineers commit from anthropic.com, OpenAI's from openai.com), and a person's full name such as "Claude Paroz" or "Devin Weaver" is never counted; a co-author whose name is only "Claude", "Cursor" or "Gemini" counts as the tool unless the address is a personal mailbox. Assisted-by, AI-assisted, Generated-by and Generated with [tool] lines count when they name a tool or model (claude:opus-5.5, Codex, openai:gpt-5.5, or just AI). Lines that GitHub squash merges push out of git's trailer block are read too. The rules and their tests are in lib/classify.mjs and test/.
• Ring size adapts to age: monthly for repos older than two years, weekly from three months, daily from a week, one ring per commit below that. Width is the square root of the commit count, capped at 2.5× the median so one burst cannot flatten the rest; empty months leave a thin dark line. A commit whose author date is more than a year away from its commit date and isolated from the rest (a wrong clock) is set aside and reported, never one that discloses AI.
• --sessions reads only the first and last 64 KB of each transcript in ~/.claude/projects and ~/.codex/sessions (working directory and timestamps) and marks commits made during a session or within 10 minutes of it. It never leaves your machine, and transcripts your tools have already cleaned up simply aren't there.

Maintainers: if you'd like your repo out of the gallery or a bot list corrected, open an issue.

Gource animates repository history as a tree of files. git-of-theseus charts how much code from each year survives. git-ai tracks AI authorship line by line as you work. Rings is a single still picture of a repo's whole life, built only from what its commits already disclose.

Rings：把代码仓库像树干一样切开，看提交记录里 AI 是什么时候出现的。 从第一次提交开始，每个月一圈年轮（较新的仓库按周、按天或按提交），宽度由当期提交数决定。如果提交带有指名 AI 编程工具的 trailer（如 Co-authored-by: Claude <noreply@anthropic.com>、Assisted-by: Codex），或提交作者是 AI 代理自己的账号（如 copilot-swe-agent[bot]），或作者名看起来是机器人账号，就按这些提交在当月的占比给年轮着色。提交记录里的标注不等于实际使用：工具默认设置、squash 合并、代理用自己的账号提交，都会让标注出现或消失。没有颜色只代表“没有信号”，不等于“人写的”。

npx skills add vnmoorthy/rings -g     # 然后在 Claude Code / Codex 里输入 /rings
npx github:vnmoorthy/rings oven-sh/bun

无需 API key，零依赖，不上传任何数据。查看知名仓库的年轮 →

MIT