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.
npx agentmods add skills/nousresearch/hermes-agent/antigravity-clinpx skills add NousResearch/hermes-agent --skill antigravity-cligit clone --depth 1 https://github.com/NousResearch/hermes-agentWhat 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.
| Model | Per session | Once 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 |
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.
Copies of this mod
6 near-identical copies found in the catalogue:
- antigravity-cli — 100% identical, 0 lines differ
- antigravity-cli — 100% identical, 0 lines differ
- antigravity-cli — 100% identical, 0 lines differ
- antigravity-cli — 100% identical, 0 lines differ
- antigravity-cli — 100% identical, 0 lines differ
- antigravity-cli — 100% identical, 0 lines differ
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
agybinary - Driving non-interactive
agy --print/agy -pone-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:
- Shell wrapper commands —
agy help,agy install,agy plugin,agy update,agy changelog. Run these through theterminaltool. - Interactive in-session slash commands —
/config,/permissions,/skills,/agents, etc. These only exist inside a runningagyTUI session, not on the shell wrapper.
agy help shows the shell wrapper surface, NOT the in-session slash commands.
Prerequisites
- The
agybinary on PATH. Verify through theterminaltool: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.
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.
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.
- yesterday First seen · 242 lines · 20 tokens per session scan A d697957e832c
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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