Skip to content
Development
Command

/ultrathink

Execute a step-by-step, structured thinking process for complex tasks and important decisions.

From plugin
claude-code-cookbook
1.1k39 skills9 agents39 commands8 MCP
Install
> /plugin marketplace add wasabeef/claude-code-cookbook

How it fires

How this command gets triggered: by you, by Claude, or both.

  • Fires itselfClaude auto-loads it when your prompt matches the work.
  • You can call itInvoke it directly when you want it.
  • Slash command/ultrathink

Context preview

What this command does when you run it.

Execute a step-by-step, structured thinking process for complex tasks and important decisions.

Command definition

ultrathink.md

Structured thinking process for complex challenges

Execute a step-by-step, structured thinking process for complex tasks and important decisions.

Usage

# Request deep thinking from Claude
"Analyze [task] using ultrathink"

Basic Examples

# Examine architecture design
"Analyze whether to choose microservices or monolith using ultrathink"

# Analyze technology selection
"Analyze whether Rust or TypeScript is suitable for this project using ultrathink"

# Deep dive into problem solving
"Analyze the causes of poor application performance and improvement methods using ultrathink"

Collaboration with Claude

# Business decisions
"Prioritize new features using ultrathink. Consider user value, development cost, and technical risk"

# System design
"Design an authentication system using ultrathink. Consider security, scalability, and maintainability"

# Trade-off analysis
"Analyze the choice between GraphQL vs REST API using ultrathink. Based on project requirements"

# Refactoring strategy
cat src/legacy_code.js
"Develop a refactoring strategy for this legacy code using ultrathink"

Thinking Process

1. **Problem Decomposition** - Break down tasks into components 2. **MECE Analysis** - Organize without gaps or overlaps 3. **Multiple Perspective Review** - Analyze from technical, business, and user perspectives 4. **Interactive Confirmation** - Confirm with users at important decision points 5. **Evidence-Based Proposal** - Conclusions based on data and logic

Detailed Examples

# Resolve complex technical debt
"Develop a strategy to modernize a 10-year legacy system using ultrathink. Include phased migration, risks, and ROI"

# Organizational challenges
"Develop a scaling strategy for the development team using ultrathink. Assume expansion from 5 to 20 people"

# Database migration
"Analyze migrating from PostgreSQL to DynamoDB using ultrathink. Consider cost, performance, and operational aspects"

Notes

Ultrathink is ideal for tasks that require deep thinking over time. For simple questions or immediate answers, use the normal question format.

Read more
Ships withclaude-code-cookbook

A collection of commands, roles, and automation scripts for Claude Code. Automate your workflow without unnecessary confirmations, allowing you to focus on what matters.

Get the whole plugin