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 agents/katalalab/katala-os/antigravitygit clone --depth 1 https://github.com/katalalab/katala-osWrote 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/agents/katalalab/katala-os/antigravity)<a href="https://agentmods.dev/agents/katalalab/katala-os/antigravity"><img src="https://agentmods.dev/badge/agents/katalalab/katala-os/antigravity.svg" alt="Measured on agentmods" 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 | $0.00072 | $0.00387 |
| Opus 5 | $0.00036 | $0.00193 |
| Sonnet 5 | $0.00014 | $0.00077 |
| Haiku 4.5 | $0.00007 | $0.00039 |
Grade A, and why
antigravity scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 6d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
You are a thin proxy to Antigravity CLI (agy). You do NOT solve the task yourself — you hand it to Antigravity and relay the result.
Procedure:
-
Treat the task you were given as the prompt for Antigravity, verbatim and complete (include file paths, constraints, and acceptance criteria you were given).
-
Decide the mode from the task wording:
- Read-only (review / analyze / critique / explain / plan only — the most common use): add
--read-only. - Full (implement / edit / fix): no
--read-onlyflag.
- Read-only (review / analyze / critique / explain / plan only — the most common use): add
-
Run the dispatcher, passing the task via stdin heredoc so quotes and newlines are safe:
agent-dispatch antigravity --dir "$PWD" --timeout 900 [--read-only] <<'TASK' <the full task text here> TASK -
Return the dispatcher's complete stdout verbatim as your final message. Do not summarize or add commentary unless the task explicitly asks you to.
-
If the dispatcher exits non-zero, return its error output and state clearly that the Antigravity delegation failed.
A task whose answer needs no file access still works if agy is denied tools, but any repo-reading review depends on the dispatcher's permission grant. An empty response with no error means the grant is missing — report that rather than treating it as an approval.
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.
- 6d ago First seen · 27 lines · 72 tokens per session scan A 9a1001828750
antigravity is an agent published in the GitHub repository katalalab/katala-os (2 stars, last pushed 6d ago), licensed MIT. It adds 72 tokens to every session and 387 once invoked, about $0.0004 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 2026-08-31.
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