@bacnh85/pi-agy

Google Antigravity CLI (agy) bridge for Pi — delegate bulk scaffolding, refactors, and test generation to a leaner model.

Packages

Package details

extensionskill

Install @bacnh85/pi-agy from npm and Pi will load the resources declared by the package manifest.

npm repo home report

$ pi install npm:@bacnh85/pi-agy

Package: @bacnh85/pi-agy
Version: 0.2.0
Published: Jul 15, 2026
Downloads: 266/mo · 266/wk
Author: bacnh85
License: MIT
Types: extension, skill
Size: 20.7 KB
Dependencies: 0 dependencies · 2 peers

Pi manifest JSON

{
  "extensions": [
    "./extensions/index.ts"
  ],
  "skills": [
    "./skills"
  ]
}

Security note

Pi packages can execute code and influence agent behavior. Review the source before installing third-party packages.

README

pi-agy

Google Antigravity CLI (agy) bridge for the Pi coding agent.

Offload bulk implementation, scaffolding, repetitive refactors, and exhaustive test generation to Gemini, Claude, or GPT-OSS through agy, while Pi retains the conductor role for judgement and verification.

Install

pi install npm:@bacnh85/pi-agy

Prerequisites

Install the Antigravity CLI:

pipx install antigravity

Authenticate (one-time in your terminal):

agy

Verify the CLI works:

agy --version
agy models

Tool

`agy_execute`

Param	Type	Default	Description
`prompt`	string	required	Task instruction for agy
`model`	model alias below	`flash-medium`	Antigravity model; takes precedence over `tier`
`tier`	`flash` / `flash-lo` / `pro`	—	Legacy Gemini tier compatibility
`mode`	`accept-edits` / `plan` / `sandbox`	`accept-edits`	agy execution mode
`dir`	string	cwd	Working directory
`digest`	boolean	mode-based	Compact output; defaults on for `plan`/`sandbox` and off for `accept-edits`
`timeout_ms`	number	`300000`	Timeout in milliseconds

Models

Alias	Antigravity display name	Typical use
`flash-low`	Gemini 3.5 Flash (Low)	Trivial, few-step, high-volume work
`flash-medium`	Gemini 3.5 Flash (Medium)	Default coding, exploration, and tests
`flash-high`	Gemini 3.5 Flash (High)	Difficult agentic work
`pro-low`	Gemini 3.1 Pro (Low)	Advanced reasoning
`pro-high`	Gemini 3.1 Pro (High)	Hardest Gemini reasoning
`sonnet`	Claude Sonnet 4.6 (Thinking)	Normal Claude coding and review
`opus`	Claude Opus 4.6 (Thinking)	Hardest architecture and root-cause review
`gpt-oss`	GPT-OSS 120B (Medium)	Alternative open model

Resolution order is explicit model, then explicit legacy tier, then flash-medium. Legacy mappings remain flash → flash-high, flash-lo → flash-low, and pro → pro-high. Run agy models if Antigravity changes its display names or plan availability.

Quota-aware routing

Work	Produce	Cross-review when consequential
Routine bulk work	`flash-medium` (Gemini quota group)	`sonnet` with `mode=plan`
Claude-group implementation	`sonnet` (Claude quota group)	`flash-medium` with `mode=plan`
Hard reasoning	Escalate to `pro-high` or `opus` only after the cheaper model is insufficient	Opposite family

Batch related work, prefer digest=true for non-write calls, and avoid parallel calls inside one shared-quota group. Do not spend both groups on trivial tasks. Pi should review the diff and run verification after every accept-edits call.

# Gemini produces, Claude reviews
agy_execute prompt="Implement the approved refactor" model=flash-medium mode=accept-edits
agy_execute prompt="Review the resulting diff" model=sonnet mode=plan digest=true

# Claude produces, Gemini reviews
agy_execute prompt="Fix the parser root cause" model=sonnet mode=accept-edits
agy_execute prompt="Review the resulting diff" model=pro-low mode=plan digest=true

Safety

Pre-flight checks verify agy is installed and the CLI can reach its backend (agy --version + agy models).
agy always runs with detached stdin (stdio: ['ignore', 'pipe', 'pipe']) to prevent hanging.
Output is truncated to 8000 characters to protect Pi's context window.
Always review the git diff after accept-edits mode.

Development

cd pi-agy
npm install
npm test