coco-research/ultra-think
Deep, multi-dimensional analysis and problem solving. Activates systematic reasoning across technical, business, user, and system perspectives. Generates multiple solutions with trade-offs, then synthesizes into a clear recommendation.
npx skills add https://github.com/coco-research/coco --skill ultra-think
Deep, multi-dimensional analysis and problem solving. Activates systematic reasoning across technical, business, user, and system perspectives. Generates multiple solutions with trade-offs, then synthesizes into a clear recommendation.
Use when: facing architectural decisions, complex trade-offs, strategic technology choices, system design problems, scaling challenges, migration decisions, or any question that deserves more than a quick answer. Attach this skill when you want rigorous, first-principles thinking.
Do NOT jump to a solution. Follow every step below in order. Think deeply at each stage before moving on.
Before analyzing, make sure you understand what's actually being asked.
Analyze the problem from four perspectives. Do not skip any.
Brainstorm at least 3 distinct approaches — not variations of the same idea.
For each approach, evaluate:
Include at least one unconventional or creative solution. Consider hybrid approaches that combine strengths of different options.
For the 1–2 most promising solutions:
Look beyond the immediate domain for insight:
Play devil's advocate against every solution, including the one you favor.
Combine all insights into a structured deliverable. Use this exact format:
## Problem Analysis
- **Core challenge**: [one sentence]
- **Key constraints**: [list]
- **Critical success factors**: [what must be true for any solution to work]
- **Assumptions**: [what we're taking as given]
## Solution Options
### Option 1: [Name]
- **Description**: [2-3 sentences]
- **Pros**: [list]
- **Cons**: [list]
- **Complexity**: [S/M/L/XL]
- **Risk level**: [Low/Medium/High]
- **Best when**: [conditions that make this the right choice]
### Option 2: [Name]
[Same structure]
### Option 3: [Name]
[Same structure]
## Recommendation
- **Recommended approach**: [which option and why]
- **Rationale**: [the decisive factors]
- **Implementation roadmap**: [phases with rough timelines]
- **Success metrics**: [how we'll know it's working]
- **Risk mitigation**: [top 3 risks and their mitigations]
- **Reversibility**: [how hard to undo if wrong]
## Contrarian View
- **The case against this recommendation**: [strongest counterargument]
- **What would change our mind**: [signals that we chose wrong]
- **Areas of uncertainty**: [what we don't know yet]
## Confidence Assessment
- **Overall confidence**: [High/Medium/Low] — [why]
- **What would increase confidence**: [additional research, prototyping, data needed]
End with a brief reflection:
Apply these mental models throughout the analysis:
| Principle | Application |
|-----------|-------------|
| First Principles | Break down to fundamental truths, don't reason by analogy alone |
| Systems Thinking | Consider interconnections, feedback loops, emergent behavior |
| Probabilistic Thinking | Work with ranges and likelihoods, not certainties |
| Inversion | Ask "what should we avoid?" not just "what should we do?" |
| Second-Order Effects | Consider the consequences of consequences |
| Reversibility | Prefer reversible decisions; be extra careful with irreversible ones |
| Occam's Razor | Among equally valid solutions, prefer the simpler one |
Take coco-research/ultra-think from the repository into ~/.claude/skills for personal
use, or into .claude/skills inside a project.
The agent identifies a skill by the name field in its header. Two skills with the
same name cannot sit side by side — one of them will be ignored.