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 heyAyushh/stacc --skill ultrathinkgit clone --depth 1 https://github.com/heyAyushh/staccWrote 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/heyayushh/stacc/ultrathink)<a href="https://agentmods.dev/skills/heyayushh/stacc/ultrathink"><img src="https://agentmods.dev/badge/skills/heyayushh/stacc/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/heyayushh/stacc/ultrathink"><img src="https://agentmods.dev/badge/skills/heyayushh/stacc/ultrathink.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 | $0.00039 | $0.00326 |
| Opus 5 | $0.00019 | $0.00163 |
| Sonnet 5 | $0.00008 | $0.00065 |
| Haiku 4.5 | $0.00004 | $0.00033 |
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 - Deep Reasoning Mode
Engage maximum cognitive depth for complex problems.
Protocol
1. Clarify First
Before implementation, use the AskUserQuestion subagent to:
- Confirm understanding of the core problem
- Surface hidden assumptions
- Identify edge cases and constraints
- Validate success criteria
2. Think Deeply
- Break the problem into atomic components
- Consider multiple approaches with trade-offs
- Reason through edge cases and failure modes
- Think about security, performance, and maintainability
- Document your reasoning chain explicitly
3. Implement Carefully
- Write code incrementally with clear intent
- Use meaningful names that reveal purpose
- Handle errors explicitly at boundaries
- Keep solutions minimal - no speculative features
4. Verify Rigorously
After implementation, invoke the verifier subagent to:
- Confirm the solution addresses the original problem
- Test critical paths and edge cases
- Validate no regressions were introduced
- Ensure code quality standards are met
Subagent Usage
Task(subagent_type="AskUserQuestion", prompt="Clarify X before proceeding...")
Task(subagent_type="verifier", prompt="Verify implementation of X...")
Mindset
- Prefer correctness over speed
- Question assumptions ruthlessly
- Make implicit requirements explicit
- Leave code better than you found it
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 · 56 lines · 39 tokens per session scan A 21a51f0834a0
ultrathink is a skill published in the GitHub repository heyAyushh/stacc (3 stars, last pushed 2mo ago), licensed MIT. It adds 39 tokens to every session and 326 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 2026-08-31.
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