Free · Open Source · Powered by Claude
From raw idea to go/no-go verdict.
8 phases. 11 agents. 15 minutes.
Stop asking friends for opinions. Run your startup idea through a validation pipeline that actually fights back — with real market data, competitor analysis, and a scorecard calibrated to kill weak ideas.
$ claude plugin marketplace add ferdinandobons/startup-skill
$ claude plugin install startup@startup-skill
✓ Plugin installed
$ /startup:startup-design <your idea description>
90% of startups fail.
Most never asked the hard questions.
You skip validation
The dopamine hit of a new idea feels like progress. So you jump straight to building — and skip the part that actually matters.
You ask friends
Your friends want you to succeed. That means they'll never tell you the truth. Polite encouragement is not market validation.
You discover competitors too late
You build for months, launch to crickets, and then Google your idea — only to find 15 competitors who got there first.
8 phases.
From idea to verdict.
Each phase builds on the last. No shortcuts, no hand-waving — a structured pipeline that forces rigor.
01Intake
Hard questions about founder-market fit before a single line of research begins.
02Brainstorm
Generates 5-8 variations of your idea to prevent fixation on a single approach.
03Market Research
11 agents running in 4 waves — pulling real web data, not guessing.
04Strategy
Lean Canvas, competitive positioning, and a business model that actually makes sense.
05Brand
Mission, vision, and tone of voice — so you sound like you mean it.
06Product
MVP definition and feature prioritization. Ship what matters, cut the rest.
07Financial
Revenue model, projections, and break-even analysis with tagged confidence levels.
08Validation
Experiments, risk matrix, and a go/no-go scorecard. The final verdict.
Radical honesty
Built to argue
against your idea.
Most tools validate. This one interrogates. The system is deliberately calibrated to be harsh — because the market will be harsher.
Strongest counter-arguments first
Actively searches for the most compelling reasons your idea will fail — then puts them front and center.
Every claim is tagged
Each data point is labeled Data, Estimate, or Assumption — so you know exactly what to trust.
Calibrated to kill
Scoring is tuned to reject more ideas, not fewer. A passing grade here means your idea survived something designed to destroy it.
Survival means something
If your idea makes it through all 8 phases with a positive verdict, it actually has teeth. That signal is worth something.
What founders are saying
Ran my friend's million dollar idea through it. He's not talking to me right now.
r/EntrepreneurRideAlong
The most valuable part was being forced to write down my assumptions.
r/ClaudeAI
A non-technical founder used it and saved his savings.
r/SideProject
Zero cost.
One command. Free and open source. You just need a Claude subscription.
$ claude plugin marketplace add ferdinandobons/startup-skill
$ claude plugin install startup@startup-skill
✓ Plugin installed
$ /startup:startup-design <your idea description>