Pi Git Delegate

Delegate git operations (diff/log/blame) to cheaper models via subagents — keeping parent context clean and cutting costs.

What this is

Pi Git Delegate provides typed tools that internally delegate heavy git read operations (diff, log, blame) to subagents. The subagent processes the raw git output and returns only a concise summary to the parent session. This prevents large diffs from polluting the parent's context window and lets you route expensive operations to cheaper models.

When to delegate

The cost leverage principle: delegate only when input is large and output is small.

Operation	Delegation	Why
git diff (→ summary)	✅ Delegate	Diff is large (1000+ tokens), summary is tiny
git log (→ changelog)	✅ Delegate	Many commits → compact digest
git blame (→ context)	✅ Delegate	Full blame is verbose; what matters is who/when/why
git status	❌ Direct	Output is tiny; subagent overhead not worth it
git push / git commit	❌ Direct	Write operations stay in parent for safety

Features

• git_diff_summary — delegate git diff to a subagent, return a 1-3 sentence summary
• git_log_summary — delegate git log range, return a structured digest
• git_blame_summary — delegate git blame, return who changed what and why
• Per-tool model routing — set provider and model per tool in .pi/settings.json (null uses the session defaults)
• /git-delegate:configure — interactive help for writing the settings block
• /git-delegate:status — show current model routing and example JSON
• Model override parameter — override model per-call via tool parameter
• Fallback to current model — no config needed; uses the parent session model
• Write guard — no write operations exposed as tools

Install

pi install npm:pi-git-delegate

Install locally (project-scoped):

pi install npm:pi-git-delegate -l

Try without installing:

pi -e .

Quick start

After installing (see above) or running pi -e . from this repo, call each tool in Pi:

git_diff_summary({ref: "HEAD~3"})
git_log_summary({range: "main..feature"})
git_blame_summary({path: "src/auth.ts"})

The tools are registered automatically — no extra setup required.

Configuration

Model routing is optional. Run in Pi:

/git-delegate:configure

This shows what each key does, prints a starter JSON block, and can save it to .pi/settings.json interactively.

Check the current routing anytime with:

/git-delegate:status

Manual example for .pi/settings.json:

{
  "pi-git-delegate": {
    "diff": { "provider": "anthropic", "model": "claude-3-5-haiku-latest" },
    "log": { "provider": null, "model": null },
    "blame": { "provider": null, "model": null }
  }
}

null means "use the current session provider/model".

Tool examples

Once installed, the tools are available automatically. Pi calls them via pi list.

git_diff_summary({ref: "HEAD~3"})
→ "feat: add avatar upload with resize (3 files, 2 commits)"

git_log_summary({range: "main..feature"})
→ "3 commits: feat(avatar), fix(crop), chore(deps)"

git_blame_summary({path: "src/auth.ts"})
→ "src/auth.ts: 3 authors, most recent by @alice (2026-06-01)"

Package contents

Path	Purpose
extensions/	Pi TypeScript extension entrypoints
lib/	Shared TypeScript helpers
docs/	Optional supporting docs

Development

npm install
npm run ci

Release

This package is set up for npm Trusted Publishing, so no NPM_TOKEN is required.

npm version patch
git push

See docs/release.md for setup details.

Docs

docs/ is optional supporting documentation, not a fixed six-file set. README stays the GitHub/npm entrypoint; add docs/*.md only when they help users or maintainers.

• docs/examples.md — tool usage examples
• docs/release.md — Trusted Publishing details (README Release summarizes the flow)
• ROADMAP.md — maintenance direction and bounded seed candidates

Security

Pi packages can execute code with your local permissions. Review extensions before installing third-party packages.

For vulnerability reporting, see SECURITY.md.

Links

• npm: https://www.npmjs.com/package/pi-git-delegate
• GitHub: https://github.com/eiei114/pi-git-delegate
• Issues: https://github.com/eiei114/pi-git-delegate/issues

License

MIT