How does this skill differ from standard Claude chat?

Standard AI tends to be supportive; this skill is intentionally skeptical and critical. It uses a specific 14-category framework and a library of 'red flags' to find weaknesses in your logic that a supportive assistant might miss.

Do I need a complete plan before using this skill?

Not at all. The skill is designed to handle vague ideas and will help you flesh them out through dialogue, specifically marking areas of uncertainty that require further investigation.

Can it handle multiple business ideas?

Yes, it can manage multiple ideas by organizing each into its own kebab-case folder within the .ideas/ directory, allowing you to compare different concepts side-by-side.

What kind of questions does the skill ask?

It focuses on evidence-based questions like 'How do you know this is a problem?', 'What is the specific math behind your revenue?', and 'Where specifically will you find your first 100 customers?'

Where are the business briefs stored?

The skill automatically creates a directory structure at .ideas/[idea-name]/ and saves a detailed business.md file there for your long-term reference.

Critical Business Brief

Name: Critical Business Brief
Author: Przemocny

byPrzemocny

•

生产力与工作流

Validates business ideas and stress-tests assumptions through skeptical, realistic dialogue and structured documentation.

Critical Business Brief acts as a rigorous mentor within Claude Code, designed to challenge the viability of new ventures before resources are committed. Unlike standard AI assistants that often offer premature validation, this skill employs a skeptical approach to expose blind spots, demand evidence, and use mathematical reality to identify potential failure points. By guiding users through a 14-category framework—ranging from unit economics to competitive defense—it transforms vague concepts into structured, reality-tested business briefs saved directly to your repository's .ideas folder.

主要功能

01Mathematical stress-testing to expose unrealistic growth or pricing assumptions.

02Skeptical, dialogue-driven exploration that challenges assumptions rather than validating them.

038 GitHub stars

04Automatic generation of comprehensive business briefs in Markdown format within the .ideas/ folder.

05Red-flag detection system based on common startup failure patterns and market obstacles.

06Rigorous 14-point framework covering UVP, Go-to-Market, Revenue Models, and Unit Economics.

使用场景

01Stress-testing an existing business model to prepare for investor questions or internal pivots.

02Refining an MVP strategy by identifying the most critical assumptions that need validation.

03Vetting a new startup or side project idea before writing the first line of code.

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add przemocny/critical-briefs critical-business-brief

For use in Claude.ai and ChatGPT

Download Skill