1. Habit
  2. Skills
  3. Idea Validator skill
buildgreatproducts · 2K installs

Idea Validator skill
Runs by itself, idea file changes.

A blunt verdict on every idea.

Install the Idea Validator skill and make it a habit: follow https://gethabit.dev/skills/buildgreatproducts/idea-validator.md

  1. 1Copy
  2. 2Paste into Claude Code, Codex or Cursor
  3. 3It runs by itself

2K installs232 starsMIT licenceSource on GitHub ↗

Idea Validator

by buildgreatproducts · 2K installs

The skill

Idea validator is a BuilderOS skill for founders that pressure-tests a product idea for fatal flaws, real pain, competition, first customers and a 2-week MVP test, then gives a strong, weak or pivot verdict.

Only when you ask.

The habit

A blunt verdict on every idea.

↻ Runs by itselfidea file changes

How the habit works.
You don't have to.

Three questionsWhen does it start? How does it check its work? What does it remember?

01

It starts by itself

idea file changes. Runs in Claude Code.

  • ↻ idea file changes
  • event: docs/product-idea.md updated or new discovery

02

It checks its work

report written, verified. If a check fails, it stops.

  • ✓docs/validation-report.md exists after the write
  • ✓the report has one verdict: Strong, Weak or Pivot required
  • ✓the scorecard has six rows scored 1 to 5
  • ✓Candidates considered is preserved unchanged

03

It remembers

validation report. The next run reads it first: the last verdict and what changed since.

docs/validation-report.md

One run, step by step.
Then it stops.

Stop ruleStops after one validation per run.

  1. 01

    Read the idea

    Read docs/product-idea.md, or ask for idea, customer and desired action.

  2. 02

    Find the core

    State the one assumption that must be true.

  3. 03

    Find flaws

    List up to three fatal flaws by severity, each with a fast test.

  4. 04

    Test the market

    Write problem reality, competition map, first 10 customers and the MVP test.

  5. 05

    Score and judge

    Fill the six-row scorecard and give a Strong, Weak or Pivot verdict.

  6. 06

    Check direction

    Ask the founder the direction questions the findings raise.

  7. 07

    Write and hand off

    Apply agreed edits, write the report and point to Product Planner or Idea Generator.

What it may do.
Nothing more.

Safe by defaultIt writes only in its own folder and asks you before anything goes out.

Is it for you?
Use it when it fits.

Quick checkRead both lists. If the left one sounds like you, the Idea Validator skill helps.

Use it when

  • ✓ You want your idea stress-tested
  • ✓ You need a 2-week MVP test
  • ✓ You doubt the problem is real

Skip it when

  • – You have no idea yet
  • – You already validated with customers

Questions

Idea Validator skill, answered.

Does it invent market data?

No. It names facts to verify instead of guessing.

What happens on a Weak verdict?

No edits are applied; it recommends more discovery first.

How do I install the Idea Validator skill?

Copy the prompt at the top into your agent. It installs the skill from buildgreatproducts/builder-os and sets up the habit. Or run npx skills add buildgreatproducts/builder-os --skill idea-validator.

Is the Idea Validator skill free?

Yes. It is published under MIT. Habit is free too.

Idea Validator. Now as a habit.

Install the Idea Validator skill and make it a habit: follow https://gethabit.dev/skills/buildgreatproducts/idea-validator.md

  • Free
  • No account
  • Undo in one line

All buildgreatproducts skills →More planning skills →

Works in

  • Claude Code
  • Codex
  • Cursor
  • ChatGPT
  • Claude app

Made by buildgreatproducts, published under MIT. Habit links to the original and never changes it. Is this your skill?

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