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 intellectronica/agent-skills --skill ultrathinkgit clone --depth 1 https://github.com/intellectronica/agent-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/skills/intellectronica/agent-skills/ultrathink)<a href="https://agentmods.dev/skills/intellectronica/agent-skills/ultrathink"><img src="https://agentmods.dev/badge/skills/intellectronica/agent-skills/ultrathink/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/intellectronica/agent-skills/ultrathink"><img src="https://agentmods.dev/badge/skills/intellectronica/agent-skills/ultrathink.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
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 | $0.00037 | $0.00421 |
| Opus 5 | $0.00018 | $0.00211 |
| Sonnet 5 | $0.00007 | $0.00084 |
| Haiku 4.5 | $0.00004 | $0.00042 |
Grade A, and why
ultrathink 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 12d 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
Ultrathink
When this skill is invoked, run this Bash command to display colourful ANSI art:
printf '\n \033[1;31m╦ ╦\033[1;33m╦ \033[1;32m╔╦╗\033[1;36m╦═╗\033[1;34m╔═╗\033[1;35m╔╦╗\033[1;31m╦ ╦\033[1;33m╦\033[1;32m╔╗╔\033[1;36m╦╔═\033[0m\n \033[1;31m║ ║\033[1;33m║ \033[1;32m║ \033[1;36m╠╦╝\033[1;34m╠═╣\033[1;35m ║ \033[1;31m╠═╣\033[1;33m║\033[1;32m║║║\033[1;36m╠╩╗\033[0m\n \033[1;31m╚═╝\033[1;33m╩═╝\033[1;32m ╩ \033[1;36m╩╚═\033[1;34m╩ ╩\033[1;35m ╩ \033[1;31m╩ ╩\033[1;33m╩\033[1;32m╝╚╝\033[1;36m╩ ╩\033[0m\n\n'
Do not add any other output or commentary.
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.
- 12d ago First seen · 15 lines · 37 tokens per session scan A e0fecea2f5ce
ultrathink is a skill published in the GitHub repository intellectronica/agent-skills (292 stars, last pushed 4mo ago), licensed CC0-1.0. It adds 37 tokens to every session and 421 once invoked, about $0.0002 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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