Idea Evaluator — Development skill for Claude Code

Idea Evaluator — Claude Code plugin that tells you if your startup idea is dead


Idea Evaluator (`idea-evaluator`) is an open-source startup idea validator that runs inside your own Claude Code. You describe an idea in a few sentences; it researches the market on the public web and returns exactly one verdict: `DEAD`, `ALIVE` or `INSUFFICIENT_DATA`, with the evidence, the riskiest assumption and the cheapest 14-day test that would decide it. It is for founders, indie hackers and product people who want to find out what kills an idea before spending months on it.

**How it differs from asking a chatbot or using an AI idea validator website**

• It looks for the cause of death, not for reasons to like the idea. A separate kill-check agent searches for free substitutes, platforms that already ship the feature, earlier startups that died with the same model, cost to serve and licences.
• Every finding carries a verbatim quote and a link, and code checks that the quote is on the page. An auditor rechecks the decisive quotes live and whether each quote supports its claim in context.
• The verdict comes from a deterministic script (bin/decide) over a sheet of 18 kill patterns and 7 alive signals, not from the model's mood. An author-blind judge agent gives a second opinion.
• It says INSUFFICIENT_DATA, with the facts to collect, rather than killing a real success on thin evidence or rescuing an idea with hypothetical futures.
• MIT-licensed, runs on your existing Claude Code login, no extra API keys or accounts; run files stay on your machine.

Quick install

claude plugin marketplace add mikamika06/idea-evaluator
claude plugin install idea-evaluator@idea-evaluator

Then, in any Claude Code session:

/idea-evaluator:evaluate An AI meeting note-taker for B2B sales teams that pushes notes into the CRM, USD 20 per user per month