Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add simplybychris/antigravity-plugin-cc/plugin install agyWrote 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.
[](https://agentmods.dev/commands/simplybychris/antigravity-plugin-cc/setup)<a href="https://agentmods.dev/commands/simplybychris/antigravity-plugin-cc/setup"><img src="https://agentmods.dev/badge/commands/simplybychris/antigravity-plugin-cc/setup/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/commands/simplybychris/antigravity-plugin-cc/setup"><img src="https://agentmods.dev/badge/commands/simplybychris/antigravity-plugin-cc/setup.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00020 | $0.00281 |
| Opus 5.5 | $0.00008 | $0.00112 |
| Sonnet 5.5 | $0.00004 | $0.00056 |
| Haiku 4.5 | $0.00002 | $0.00028 |
Grade C, and why
setup scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Downloads and executes remote codehighSupply chain
curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.
curl -fsSL https://antigravity.google/cli/install.sh | bash Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
allowed-tools: Bash(bash:*), Bash(curl:*), AskUserQuestion Copies of this mod
1 near-identical copy found in the catalogue:
- setup — 100% identical, 0 lines differ
What it actually says
Run:
bash "${CLAUDE_PLUGIN_ROOT}/scripts/agy-run.sh" check
Then interpret the JSON output:
-
If
installed: false, useAskUserQuestiononce to offer installation. Options:Install agy now (Recommended)— run the official installer:
Then re-run the check.curl -fsSL https://antigravity.google/cli/install.sh | bashSkip for now— explain that/antigravity:ask,/antigravity:delegate, and/antigravity:reviewwill fail untilagyis installed.
-
If
installed: truebutauth: missing, tell the user to either:- run
!agyonce interactively to complete OAuth (cached in the system keyring), or - export
ANTIGRAVITY_API_KEYin their shell rc and reload it.
- run
-
If
installed: trueandauthisapi-keyoroauth, report that everything is ready — one short status line is enough.
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.
- 1mo ago First seen · 31 lines · 20 tokens per session scan C df97f14f28fc
setup is a command published in the GitHub repository simplybychris/antigravity-plugin-cc (80 stars, last pushed 4mo ago), licensed MIT. It adds 20 tokens to every session and 281 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
Other commands, from other repositories
agy
Delegate a prompt to the Antigravity (agy) CLI agent.
agy
Delegate any task to agy (Google Antigravity CLI) — auto-selects model by task type.
agy
A command for using Antigravity through AgySafe. The description does not explain what Antigravity or AgySafe does.
delegate
Hand a task to Antigravity (Gemini 3.5) and get the result back inside Claude Code.
review
Cross-model code review of your changes by Gemini 3.5 (read-only, contained).
result
Show the final output (and conversation id) of a finished Antigravity job.