antigravity-cli

A skill for operating Antigravity, a command-line tool named `agy`, including its plugins, login setup, sandbox, permissions, and logs. It distinguishes shell commands from commands available only inside Antigravity's interactive interface.

In plain words
What is it for?
Use it to install, update, test, or run Antigravity. It also helps inspect settings and troubleshoot authentication, sandbox, permissions, and plugin issues.
Why use it?
It reduces confusion when installing the tool, running tasks, or diagnosing access problems. The distinction between command types helps prevent using a command in the wrong place.

Skill for Claude CodeCodex

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add skills/nousresearch/hermes-agent/antigravity-cli
Any agent
npx skills add NousResearch/hermes-agent --skill antigravity-cli
Clone the repo
git clone --depth 1 https://github.com/NousResearch/hermes-agent

Made for: Claude Code, Codex.

Per session 20 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,510 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00020 $0.02510
Opus 5 $0.00010 $0.01255
Sonnet 5 $0.00004 $0.00502
Haiku 4.5 $0.00002 $0.00251

Measured yesterday against content hash d697957e832c, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

antigravity-cli scanned grade A with 0 findings 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 yesterday.

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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

6 near-identical copies found in the catalogue:

optional-skills/autonomous-ai-agents/antigravity-cli/SKILL.md · 242 lines

How it starts

The opening of the file, as written. The whole thing — 242 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Antigravity CLI (agy)

Operator guide for the Antigravity CLI, invoked as agy. Run all agy commands through the Hermes terminal tool; inspect its config and logs with read_file. This skill is reference + procedure — it does not wrap a network API, so there is nothing to authenticate from Hermes itself.

When to Use

  • Installing, updating, or smoke-testing the agy binary
  • Driving non-interactive agy --print / agy -p one-shots
  • Debugging Antigravity auth, sandbox, permissions, or plugin state
  • Reading Antigravity settings, keybindings, conversations, or logs

Mental model

Antigravity has two layers — keep them distinct or the guidance will be wrong:

  1. Shell wrapper commandsagy help, agy install, agy plugin, agy update, agy changelog. Run these through the terminal tool.
  2. Interactive in-session slash commands/config, /permissions, /skills, /agents, etc. These only exist inside a running agy TUI session, not on the shell wrapper.

agy help shows the shell wrapper surface, NOT the in-session slash commands.

Prerequisites

  • The agy binary on PATH. Verify through the terminal tool: command -v agy && agy --version.
  • No env vars or API keys required by this skill — Antigravity manages its own auth via the OS keyring / browser sign-in (see Authentication below).

How to Run

Invoke every agy command through the terminal tool. Examples:

terminal(command="agy --version")
terminal(command="agy help")
terminal(command="agy plugin list")
terminal(command="agy --print 'Summarize the repo in 3 bullets'", workdir="/path/to/project")

For an interactive multi-turn TUI session, launch agy with pty=true (and tmux for capture/monitoring), the same pattern the codex / claude-code skills use. For one-shot smoke tests and scripted prompts, prefer agy --print (non-interactive).

To inspect Antigravity's own files, use read_file on the paths under Core paths below — do not cat them through the terminal.

Read the full file on GitHub · 242 lines

Files

What ships with it

1 file 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. yesterday First seen · 242 lines · 20 tokens per session scan A d697957e832c

Subscribe to this mod's changes

antigravity-cli is a skill published in the GitHub repository NousResearch/hermes-agent (238,457 stars, last pushed yesterday), licensed MIT. It adds 20 tokens to every session and 2,510 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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