I cut my Claude API bill by 66% with Git-based context
Hey HN, I built ShadowGit a while back to automatically commit code every minute to a hidden git repo (.shadowgit.git). Original goal was to easily rollback when AI tools break things. But I discovered something interesting: this minute-by-minute history is perfect context for AI assistants. So I built an MCP server that lets Claude/Cursor query this history using native git commands. The results surprised me: Before: Claude would read my entire codebase repeatedly, burning 15,000+ tokens to debug issues. After: Claude runs `git log --grep="drag"` finds when drag-and-drop worked,…
What it does
In the maker’s words, at launch
Hey HN, I built ShadowGit a while back to automatically commit code every minute to a hidden git repo (.shadowgit.git). Original goal was to easily rollback when AI tools break things. But I discovered something interesting: this minute-by-minute history is perfect context for AI assistants. So I built an MCP server that lets Claude/Cursor query this history using native git commands. The results surprised me: Before: Claude would read my entire codebase repeatedly, burning 15,000+ tokens to debug issues. After: Claude runs `git log --grep="drag"` finds when drag-and-drop worked, applies that fix. 5,000 tokens. How it works technically: 1. ShadowGit watches your project and commits every save to .shadowgit.git (parallel to your main repo) 2. MCP server exposes git operations to AI: - `git diff HEAD~10 -- component.tsx` to see recent changes - `git log -S "functionName"` to find when code was added - `git show COMMIT:file.js` to retrieve working versions 3. AI naturally understands git, so instead of dumping context, it surgically queries what it needs It's free while I am testing and improving it. I am looking for feedback on the project and maybe some integration ideas beyond MCP. Thanks! Alessandro
Does the same job
all alternatives →
- CCClaudit – Claude Code Conversations as Git Notes, AutomaticallyFeb 2026 · github.com · ▲7
Uses agent and Git Hooks to automatically create Git Notes on commit, containing the agent conversation that led to that commit. Works if either you or the agent commit. It's basically the same thing as entire.io just announced that they got $60m investment for. Except I got Claude Code to write it last week, in my spare time, without really paying attention. I certainly didn't read or write any of the code, except for one rubbish joke in the README. I've got a Claude Code instance working on Gemini CLI support and OpenCode support currently.
- CCCcgs – Collaborative Claude Code sessions, stored in Git branchesJun 2026 · github.com · ▲6
My team uses Claude Code daily, and the sessions have become some of the most useful artifacts we produce. But they're trapped in ~/.claude/projects/ on whichever laptop they happened on. There's no good way to hand a colleague "the session where I untangled the migration" so they can claude --resume it and keep going from where I left off. Enter ccgs: Share Claude Code sessions through an orphan branch (@ccgs/) in your existing repo's remote - Session files carry the author's absolute paths. On pull, ccgs rewrites the working dir back to your path so resume actually…
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