Agent skill

Validate Idea

by emotixco in emotixco/claude-skills-founder

Stress-test a startup idea before any code is written. An agent skill from emotixco/claude-skills-founder.

MITAuto-check passedMarketing & SEO

Install Validate Idea

skills CLI
$ npx skills add emotixco/claude-skills-founder --skill validate-idea -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install emotixco/claude-skills-founder validate-idea --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/emotixco/claude-skills-founder.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/validate-idea .claude/skills/validate-idea && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
validate-idea
GitHub stars
517
Token cost
~998 tokens
SKILL.md length
549 words
Files
1
Skills in repo
13
Repo updated
First seen
Licence
MIT

At a glance

Stress-test a startup idea before any code is written. An agent skill from emotixco/claude-skills-founder.

  • Works in 5 steps: The 30-second assessment → The five fatal questions → Idea scorecard → …
  • A founder asks whether an idea is worth building
  • SKILL.md covers Before you start, Instructions and Rules
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Validate Idea is an agent skill from emotixco/claude-skills-founder. Stress-test a startup idea before any code is written. Scores it on 7 dimensions, proposes 3 validation experiments under $200 each, and ends with a build, pivot, or kill verdict. Use when a founder asks whether an idea is worth building.

Its SKILL.md is about 1000 tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Marketing & SEO, covering Load testing. The repository describes itself as: Claude Code skills for startup founders — product briefs, competitor analysis, pricing strategy, pitch decks, and GTM plans from your terminal. The licence is MIT.

When your agent uses it

  • A founder asks whether an idea is worth building
  • Tasks that involve Load testing

Example prompts

  • “/validate-idea”

Requirements

  • Pre-approved tools (allowed-tools): Read, Edit(founder/**), WebSearch, WebFetch

Workflow steps

5 steps, taken from the step headings in SKILL.md.

  1. The 30-second assessment
  2. The five fatal questions
  3. Idea scorecard
  4. Validation experiments
  5. The honest verdict

What it can do on your machine

Read from SKILL.md and the folder at commit 0602cad. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves these tools, so the agent can use them without asking each time:

    • Read
    • Edit(founder/**)
    • WebSearch
    • WebFetch

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md.

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Validate Idea loads about 998 tokens when it runs. Until then it costs about 63 tokens; SKILL.md has 549 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~63
When it runs · the whole SKILL.md, loaded when a task matches
~998

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from emotixco/claude-skills-founder at commit 0602cad, republished under its MIT licence (© emotixco). 549 words, ~998 tokens.

Download SKILL.mdSave it as .claude/skills/validate-idea/SKILL.md (or your agent's skills folder).
name
validate-idea
description
Stress-test a startup idea before any code is written. Scores it on 7 dimensions, proposes 3 validation experiments under $200 each, and ends with a build, pivot, or kill verdict. Use when a founder asks whether an idea is worth building.
allowed-tools
Read, Edit(founder/**), WebSearch, WebFetch
argument-hint
[your startup idea]

You are a blunt startup advisor. Your job is to find the holes in an idea before the founder spends 6 months building the wrong thing.

Input: $ARGUMENTS

Before you start

Read ${CLAUDE_PLUGIN_ROOT}/shared/conventions.md and follow it.

  • Reads: founder/facts.md, founder/product-brief.md, founder/competitor-matrix.md
  • Needs: the idea, and who it's for
  • Saves to: founder/validate-idea.md

Instructions

1. The 30-second assessment

In 2-3 sentences, give your gut reaction. Is this a real problem worth solving, or a solution looking for a problem? Be direct.

2. The five fatal questions

Answer each honestly:

Q1: Who is the customer, and would they pay for this today?

  • Name the specific person (job title, company stage, situation)
  • Estimate their willingness to pay, and justify it
  • If the answer is "maybe", that's a no

Q2: Why hasn't someone built this already?

  • List who has tried (there's always someone), with links
  • Why they failed or succeeded
  • What's different now? (timing, technology, regulation, behavior shift)

Q3: What's the distribution advantage?

  • How will the first 100 users find this product?
  • Is there a built-in growth loop, or is every user acquired through paid or manual effort?
  • If the only answer is "content marketing and SEO", that's a red flag for a startup

Q4: Can this be a big business, or is it a feature?

  • Is this a standalone product, or will an incumbent add it as a feature?
  • What's the natural ceiling? ($ revenue, # users)
  • What would need to be true for this to reach $1M ARR?

Q5: Can the founder actually build this?

  • What skills and resources are required?
  • What's the hardest technical or operational challenge?
  • Is this a "first hire" problem (you can't launch without a specific expert)?
Show full SKILL.md (274 more words)Show less
3. Idea scorecard

Rate the idea on each dimension (1-5):

DimensionScoreNotes
Problem severityHow painful is this?
Market sizeHow many people have this problem?
Willingness to payWill they pay enough to build a business?
Competition gapIs there real space for a new entrant?
DistributionCan you reach customers cheaply?
TimingIs this the right moment?
Founder fitDoes the founder have an unfair advantage?
Total/35

If the input says nothing about the founder, score founder fit as "?" and ask about it in the verdict.

Scoring guide:

  • 28-35: Strong idea. Validate fast and build.
  • 21-27: Promising but has gaps. Fix the weakest dimension before building.
  • 14-20: Significant concerns. Needs a major pivot or a different angle.
  • Below 14: Start over. The idea has fundamental problems.
4. Validation experiments

Recommend 3 specific experiments to run before writing any code. For each:

  • What to test (one specific assumption)
  • How to test it (exact steps, not "talk to users")
  • Success criteria (a specific number or outcome)
  • Time and cost (under 2 weeks and under $200)
5. The honest verdict

End with one of:

  • Build it, with the single most important thing to do this week
  • Pivot it, with the angle that would make this much stronger
  • Kill it, with why, and which adjacent problem is worth solving instead

Rules

  • Be honest, not encouraging. False encouragement kills startups.
  • Every critique must be specific and actionable.
  • If you think the idea is bad, say so clearly, then say what would make it good.
  • Name real companies that succeeded or failed in similar spaces, with a link for each.
  • Keep total output under 1500 words.

© emotixco, MIT. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in skills/validate-idea of emotixco/claude-skills-founder.

Open the folder on GitHubat commit 0602cad

Compare with similar skills

Validate Idea next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Validate Idea compared with similar skills
SkillStarsUsed inTokensAuto-checkLicenceRepo updated
Validate Idea this skillemotixco/claude-skills-founder517—~998Automated safety check: PassMIT
Money Strategyiamzifei/show-me-the-money1k—~7kAutomated safety check: PassCustom licence
High Token ModeLomnus-ai/TokenBurner173—~9.1kAutomated safety check: PassMIT
Money Review Customeriamzifei/show-me-the-money1k—~2.1kAutomated safety check: PassCustom licence
Thinking Partnermattnowdev/thinking-partner206—~4.4kAutomated safety check: PassMIT
Money Discoveriamzifei/show-me-the-money1k—~3.6kAutomated safety check: PassCustom licence

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Questions about Validate Idea

What does Validate Idea do?

Stress-test a startup idea before any code is written. An agent skill from emotixco/claude-skills-founder. Validate Idea is an agent skill from emotixco/claude-skills-founder. Stress-test a startup idea before any code is written.

When should I use Validate Idea?

Validate Idea fits situations like: A founder asks whether an idea is worth building; tasks that involve Load testing.

How do I install Validate Idea in Claude Code?

Run `npx skills add emotixco/claude-skills-founder --skill validate-idea -a claude-code`. Or copy the skill folder (skills/validate-idea in emotixco/claude-skills-founder) into .claude/skills/validate-idea in your project. Claude Code loads it when a task matches its description.

How do I install Validate Idea in Codex?

Run `npx skills add emotixco/claude-skills-founder --skill validate-idea -a codex`. Or copy the skill folder (skills/validate-idea in emotixco/claude-skills-founder) into .agents/skills/validate-idea in your project. Codex loads it when a task matches its description.

Can I use Validate Idea in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add emotixco/claude-skills-founder --skill validate-idea -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/validate-idea, .gemini/skills/validate-idea, .github/skills/validate-idea and .opencode/skills/validate-idea in your project.

What does Validate Idea need to run?

SKILL.md names no scripts, command-line tools or credentials: Validate Idea is instructions for the agent only. Its frontmatter pre-approves these tools: Read, Edit(founder/**), WebSearch, WebFetch.

Does Validate Idea access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Validate Idea safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Validate Idea use?

Validate Idea is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Validate Idea use?

About 998 tokens (SKILL.md is roughly 4k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Validate Idea?

Skills that share tags, products or a category with Validate Idea: Money Strategy (iamzifei/show-me-the-money, 1k stars), High Token Mode (Lomnus-ai/TokenBurner, 173 stars), Money Review Customer (iamzifei/show-me-the-money, 1k stars) and Thinking Partner (mattnowdev/thinking-partner, 206 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Validate Idea?

emotixco (a GitHub organization) maintains it in emotixco/claude-skills-founder, which has 517 GitHub stars. The repository holds 13 skills in this directory. The repository was last updated on October 7, 2026.

Source: emotixco/claude-skills-founder on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.