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 instructions/catcatcatstudio/cat-skills/agents-mdgit clone --depth 1 https://github.com/catcatcatstudio/cat-skillsWrote 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/instructions/catcatcatstudio/cat-skills/agents-md)<a href="https://agentmods.dev/instructions/catcatcatstudio/cat-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/catcatcatstudio/cat-skills/agents-md.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 | $0.00407 | $0.00407 |
| Opus 5 | $0.00204 | $0.00204 |
| Sonnet 5 | $0.00081 | $0.00081 |
| Haiku 4.5 | $0.00041 | $0.00041 |
Grade A, and why
cat-skills AGENTS.md 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 5d 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
cat-skills
AI agent skills by catcatcat. Each skill is a self-contained instruction set in skills/.
Skill Directory
| Skill | Trigger | Description |
|---|---|---|
| eat | /eat |
Knowledge extraction from URLs — YouTube, articles, podcasts, X threads |
| notebook | /notebook |
Project notes — decisions, failures, lessons, context recovery |
| architect | /architect |
Staged build methodology — spike, design, plan, build |
| recon | /recon |
Pre-build intelligence — best practices, pitfalls, architecture research |
| xray | /xray |
X/Twitter content intelligence — scout, pulse, track, mirror, prospect |
| elevate | /elevate |
Expert elevation — shifts model from executor to critical advisor |
| prodev | /prodev |
Engineering standard enforcement — ownership, blast radius, anti-sycophancy |
| memento | /memento |
Context handoff for fresh sessions |
| liquid-cat-physics | /liquid-cat-physics |
Autonomous deep-work loop — expert lens + prodev standard, confidence gating, persists, loops |
| fortify | /fortify |
Testing infrastructure, coverage, and mutation testing |
| vet | /vet |
Thorough codebase investigation — find every problem, plan fixes, execute |
Reference Files
| File | Path |
|---|---|
| Build methodology | skills/architect/references/methodology.md |
| Testing obligations | skills/architect/references/testing.md |
| Stage template | skills/architect/references/stage-template.md |
| Notebook standalone | skills/notebook/INSTRUCTIONS.md |
| Expert questions | skills/recon/references/expert-questions.md |
| Research categories | skills/recon/references/research-categories.md |
| X API reference | skills/xray/references/x-api.md |
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.
- 5d ago First seen · 32 lines · 407 tokens per session scan A fdb45ad4dc54
cat-skills AGENTS.md is an instructions file published in the GitHub repository catcatcatstudio/cat-skills (3 stars, last pushed 9d ago), licensed MIT. It adds 407 tokens to every session, about $0.0020 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.
Other instructions, from other repositories
csift AGENTS.md
AGENTS.md instructions for wdhwg001/csift, covering agents.md - csift operating manual, 1. what csift is, 3.1 data location + path encoding, 3.2 record model (one json object per line) and 3.4 askuserquestion.
recursive-decomposition-skill AGENTS.md
Instructions for massimodeluisa/recursive-decomposition-skill, covering agents: recursive-decomposition skill, read these first (mandatory), language policy, non-negotiables and commands.
stockbit-mcp CLAUDE.md
Claude Code instructions for INo-xious/stockbit-mcp, covering claude.md, what this is, commands, the map and three invariants. do not break them; each has a test.
writer-style-skill CLAUDE.md
Claude Code instructions for solanabr/writer-style-skill, covering writer-style — voice & tone specialist, communication style, the model (in one screen), routing (by dominant job, not topic) and always-apply rules.
interactive-docs-skill CLAUDE.md
Claude Code instructions for adamyodinsky/interactive-docs-skill, covering interactive docs skill, structure, key conventions and testing changes.
recursive-decomposition-skill CLAUDE.md
Instructions for massimodeluisa/recursive-decomposition-skill, a project described as: Claude Code skill for handling long-context tasks through recursive decomposition.