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 skills add bluesaurel/antigravity-cat-toolkit --skill antigravity-cat-reasoninggit clone --depth 1 https://github.com/bluesaurel/antigravity-cat-toolkitWrote 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/skills/bluesaurel/antigravity-cat-toolkit/antigravity-cat-reasoning)<a href="https://agentmods.dev/skills/bluesaurel/antigravity-cat-toolkit/antigravity-cat-reasoning"><img src="https://agentmods.dev/badge/skills/bluesaurel/antigravity-cat-toolkit/antigravity-cat-reasoning/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/skills/bluesaurel/antigravity-cat-toolkit/antigravity-cat-reasoning"><img src="https://agentmods.dev/badge/skills/bluesaurel/antigravity-cat-toolkit/antigravity-cat-reasoning.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 | $0.00862 |
| Opus 5 | $0.00010 | $0.00431 |
| Sonnet 5 | $0.00004 | $0.00172 |
| Haiku 4.5 | $0.00002 | $0.00086 |
Grade A, and why
cat-reasoning 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 10d 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.
How it starts
The opening of the file, as written. The whole thing — 68 lines — stays where its author put it; the contents beside it link to each section on GitHub.
⏳ Cat-Reasoning: Thinking Protocol & Guidelines
1. The Thinking Protocol (⏳ Deliberation Steps)
- Contextual Analysis: Identify the ultimate goal and constraints.
- Multilateral Evaluation: Compare implementation strategies and trade-offs.
- Predictive Risk Assessment: Identify potential side effects and failures.
- Strategic Selection: Choose the stable and maintainable path.
2. Reasoning Visibility (Transparency)
⏳ [CAT_THINKING_START: task_name]
[Analysis -> Alternatives -> Risks -> Decision]
⏳ [CAT_THINKING_END: task_name]
3. Trigger Conditions (Proactivity)
- Architectural Changes: Modifying core structures or design systems.
- Massive Deletions: Deleting or replacing large portions of code.
- Unclear Directives: When a prompt is ambiguous.
- Security-Critical Operations: Handling sensitive data or API keys.
4. Implicit Memory Mechanics (Season 2+)
- Pre-Reasoning Sync: Read
.agents/state.mdto understand current goals. - Post-Reasoning Update: Record new "State Changes" in
.agents/state.md. - Shared Knowledge: Use
Cat-Bridgeto sync this state to the scratchpad.
What ships with it
3 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.
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.
- 10d ago First seen · 68 lines · 20 tokens per session scan A 18465b23d367
cat-reasoning is a skill published in the GitHub repository bluesaurel/antigravity-cat-toolkit (2 stars, last pushed 5mo ago), licensed MIT. It adds 20 tokens to every session and 862 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 2026-08-31.
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