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/jackwener/opencli/antigravitynpx skills add jackwener/OpenCLI --skill antigravitygit clone --depth 1 https://github.com/jackwener/OpenCLIWhat 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 | $0.00009 | $0.00400 |
| Opus 5 | $0.00005 | $0.00200 |
| Sonnet 5 | $0.00002 | $0.00080 |
| Haiku 4.5 | $0.00001 | $0.00040 |
Grade A, and why
antigravity 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.
What it actually says
Antigravity Automation Skill
This skill allows AI agents to control the Antigravity desktop app (and any Electron app with CDP enabled) programmatically via OpenCLI.
Requirements
opencli automatically detects, launches (with --remote-debugging-port=9234), and connects to Antigravity.
If Antigravity is already running without CDP, opencli will prompt to restart it.
If the endpoint exposes multiple inspectable targets, set: ```bash export OPENCLI_CDP_TARGET="antigravity" ```
High-Level Capabilities
- Send Messages (
opencli antigravity send <message>): Type and send a message directly into the chat UI. - Read History (
opencli antigravity read): Scrape the raw chat transcript from the main UI container. - Extract Code (
opencli antigravity extract-code): Automatically isolate and extract source code text blocks from the AI's recent answers. - Switch Models (
opencli antigravity model <name>): Instantly toggle the active LLM (e.g., `gemini`, `claude`). - Clear Context (
opencli antigravity new): Start a fresh conversation.
Examples for Automated Workflows
Generating and Saving Code
```bash opencli antigravity send "Write a python script to fetch HN top stories"
wait ~10-15 seconds for output to render
opencli antigravity extract-code > hn_fetcher.py ```
Reading Real-time Logs
Agents can run long-running streaming watch instances: ```bash opencli antigravity watch ```
What ships with it
17 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.
- _actions.js 13 KB runs code
- antigravity.test.js 6.1 KB runs code
- audit-extras.js 15 KB runs code
- delete.js 2.4 KB runs code
- dump.js 968 B runs code
- extract-code.js 1.2 KB runs code
- history.js 1.0 KB runs code
- mark-read.js 2.1 KB runs code
- model.js 7.8 KB runs code
- new.js 873 B runs code
- read.js 1.4 KB runs code
- rename.js 1.4 KB runs code
- send.js 1.5 KB runs code
- serve.js 23 KB runs code
- status.js 587 B runs code
- storage.js 16 KB runs code
- watch.js 1.6 KB runs code
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 · 39 lines · 9 tokens per session scan A a8adcb7d8e88
antigravity is a skill published in the GitHub repository jackwener/OpenCLI (28,734 stars, last pushed yesterday), licensed Apache-2.0. It adds 9 tokens to every session and 400 once invoked, about $0.0000 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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