agy-cli

agy-cli is a skill for Claude Code from georgekhananaev/claude-skills-vault. It costs 0 tokens per session (5,113 once invoked), scanned A, original, MIT.

A command-line tool for Google’s Antigravity agent, an AI coding assistant that can use Gemini, Claude, or GPT models. It supports interactive conversations and longer goal-based work.

In plain words
What is it for?
Use it to run Antigravity, compare effort levels, request audits, delegate work, and generate project plans and files.
Why use it?
It lets a developer ask another agent system for a second opinion or delegate a multi-step coding, refactoring, or research task.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: reads .claude/ paths; mentions subagents; mentions Gemini CLI.

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/george/.local/bin/agy.

Good fit Use it to run Antigravity, compare effort levels, request audits, delegate work, and generate project plans and files.

Compare 6 skills from other repositories ↓
Install

Getting it into your agent

There is no command for this one: it runs only inside a plugin, and the catalogue could not identify which plugin ships it. The source is linked below.

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for agy-cli

README.md
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Your own site
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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for agy-cli

Your own site · 80×15
<a href="https://agentmods.dev/skills/georgekhananaev/claude-skills-vault/agy-cli"><img src="https://agentmods.dev/badge/skills/georgekhananaev/claude-skills-vault/agy-cli.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,113 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.05113
Opus 5 $0.00000 $0.02557
Sonnet 5 $0.00000 $0.01023
Haiku 4.5 $0.00000 $0.00511

Measured 12d ago against content hash 381451a3057f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-12, from the pricing page.

Security

Grade A, and why

agy-cli scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

The scan reads SKILL.md. This mod also ships 2 executable files (scripts/agy_preflight.sh, scripts/agy_run.sh), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Reads agent configuration directorieslowAgent snooping

.claude/, .codex/, .gemini/ hold keys, settings and other credentials a mod has no legitimate need for.

Plugins install into `~/.gemini/config/` (shared with Gemini CLI) since v1.0.2.

Downgraded: this mod is about security review, or the phrase is quoted, so it is likely naming the pattern rather than instructing it.

.claude/skills/agy-cli/SKILL.md · 289 lines

How it starts

The opening of the file, as written. The whole thing — 289 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Antigravity CLI (agy)

Google's agentic coding CLI. Runs Gemini 3 (Pro/Flash) by default, with internal access to Claude Sonnet/Opus 4.5/4.6 and GPT-OSS models. Pairs a chat REPL with planning, scheduling, and autonomous "goal" workflows that write implementation_plan.md + task.md to a per-conversation brain directory and emit project files into the workspace.

Use it when the user:

  • says "run/ask/use agy" or "antigravity"
  • wants a second opinion from Gemini's agentic loop (Claude is the primary, agy is the audit/delegate)
  • wants Claude to delegate a multi-step build, refactor, or research task to a different model family
  • specifically asks to compare effort tiers (default vs. /grill-me vs. /goal)

Prerequisites

Already installed on this user's system at /Users/george/.local/bin/agy. For others:

agy changelog                  # version notes (no --version flag exists)
agy install                    # configure PATH + shell aliases (idempotent)

First-time login is interactive (OAuth via browser). State lives at ~/.gemini/antigravity-cli/.

Run the preflight once at the start of an agy delegation session — it checks for/applies CLI updates (keeps you on the newest build), reports the active model, and repairs the empty mcp_config.json that otherwise errors on every startup:

.claude/skills/agy-cli/scripts/agy_preflight.sh --fix

Leave auto-update on for interactive use (the user wants the latest). Only set AGY_CLI_DISABLE_AUTO_UPDATE=T in throwaway CI where update pings are unwanted.

The Three Effort Tiers (the key mental model)

This is what the user means by "difference between efforts." Same prompt, very different behavior:

Tier How to invoke Latency What it does
Default chat agy -p "<prompt>" or just type in REPL seconds One-shot answer or short tool-use loop. Outline-level depth. Best for Q&A, quick edits.
/grill-me Type /grill-me <idea> in REPL interactive Interviews you to extract requirements, resolve design ambiguities, and align on a plan before writing code. Use when the idea is vague.
/goal /goal <objective> in REPL or agy -p "/goal <objective>" minutes → hour+ Autonomous loop: drafts implementation_plan.md, writes a task.md checklist, spawns research subagents, creates project files, runs tests, iterates until done. Persists to ~/.gemini/antigravity-cli/brain/<convo-id>/.

Read the full file on GitHub · 289 lines

Files

What ships with it

2 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 12d ago First seen · 289 lines · 0 tokens per session scan A 381451a3057f

Subscribe to this mod's changes

agy-cli is a skill published in the GitHub repository georgekhananaev/claude-skills-vault (28 stars, last pushed 1mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 5,113 tokens. A static security scan graded it A with 1 finding (reads agent configuration directories). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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