A free AI skill turns app ideas into a buildable MVP plan
vibe-check is a free open-source skill that turns an app idea into a practical plan and an MVP plan. It comes from 12 years of product management experience, mostly with early products. It is not meant to write code.
It works inside Claude, Codex, or Antigravity and helps decide what should be built before coding starts. It asks hard questions about whether the problem is real for other people or only feels real to the maker. It then produces a plan that can be handed to an AI coding tool for implementation.
The main point is that coding has become easier with AI, while choosing the right problem and first features remains the risky part. The project is still early, has 33 GitHub stars, and is looking for testers with app ideas.
Key points
- vibe-check is a free open-source skill for Claude, Codex, and Antigravity.
- It does not write code; it checks the idea before coding starts.
- It helps test whether the problem is real for users, not just interesting to the maker.
- It creates a plan that can be passed to an AI coding tool.
- The project is early, has 33 GitHub stars, and needs testers.
Quick term guide
- open-source
- Software whose code is shared publicly so others can inspect, use, or change it.
- Antigravity
- A tool or service name mentioned in the post title.
- AI coding tool
- Software that uses AI to help write, edit, or explain code.
- implementation
- The step where a plan is turned into working code.
- features
- The different tools or functions built into a software application.
- GitHub stars
- A public way for people to bookmark or show interest in a GitHub project.
- AI coding tools
- Programs like Claude, Cursor, or ChatGPT that write code for you when you describe what you want in plain language.
- Thinking
- A ChatGPT mode where the AI reasons through a problem step by step before giving an answer