ultrathink

ultrathink is a command for Claude Code from jellydn/my-ai-tools. It costs 0 tokens per session (239 once invoked), scanned A, original, MIT.

A command for coordinating several specialist agents—such as an architect, researcher, coder, and tester—around one task.

In plain words
What is it for?
Use it to break down a coding task, gather research, plan edits, consider tests, and list follow-up actions.
Why use it?
It organizes different kinds of analysis and combines their findings before proposing a solution.

Command for Claude Code

Written for Claude Code: $ARGUMENTS substitution. Also seen: mentions subagents.

Good fit Use it to break down a coding task, gather research, plan edits, consider tests, and list follow-up actions.

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Install with agentmods
npx agentmods add commands/jellydn/my-ai-tools/ultrathink
Install

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.

Clone the repo
git clone --depth 1 https://github.com/jellydn/my-ai-tools

Made for: Claude Code.

Wrote 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.

agentmods badge for ultrathink

README.md
[![agentmods](https://agentmods.dev/badge/commands/jellydn/my-ai-tools/ultrathink/github.svg)](https://agentmods.dev/commands/jellydn/my-ai-tools/ultrathink)
Your own site
<a href="https://agentmods.dev/commands/jellydn/my-ai-tools/ultrathink"><img src="https://agentmods.dev/badge/commands/jellydn/my-ai-tools/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.

agentmods 80×15 button for ultrathink

Your own site · 80×15
<a href="https://agentmods.dev/commands/jellydn/my-ai-tools/ultrathink"><img src="https://agentmods.dev/badge/commands/jellydn/my-ai-tools/ultrathink.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 239 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00000 $0.00239
Opus 5 $0.00000 $0.00120
Sonnet 5 $0.00000 $0.00048
Haiku 4.5 $0.00000 $0.00024

Measured 11d ago against content hash 6de018b4036f, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

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 11d 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.

configs/claude/commands/ultrathink.md · 31 lines

What it actually says

Usage

/ultrathink <TASK_DESCRIPTION>

Context

  • Task description: $ARGUMENTS
  • Relevant code or files will be referenced ad-hoc using @ file syntax.

Your Role

You are the Coordinator Agent orchestrating four specialist sub-agents:

  1. Architect Agent – designs high-level approach.
  2. Research Agent – gathers external knowledge and precedent.
  3. Coder Agent – writes or edits code.
  4. Tester Agent – proposes tests and validation strategy.

Process

  1. Think step-by-step, laying out assumptions and unknowns.
  2. For each sub-agent, clearly delegate its task, capture its output, and summarize insights.
  3. Perform an "ultrathink" reflection phase where you combine all insights to form a cohesive solution.
  4. If gaps remain, iterate (spawn sub-agents again) until confident.

Output Format

  1. Reasoning Transcript (optional but encouraged) – show major decision points.
  2. Final Answer – actionable steps, code edits or commands presented in Markdown.
  3. Next Actions – bullet list of follow-up items for the team (if any).
Changes

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.

  1. 11d ago First seen · 31 lines · 0 tokens per session scan A 6de018b4036f

Subscribe to this mod's changes

ultrathink is a command published in the GitHub repository jellydn/my-ai-tools (120 stars, last pushed today), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 239 tokens. 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.