pressure-test

pressure-test is a skill for Claude Code, Codex from nataliacorrea03/claude-code-skills. It costs 159 tokens per session (2,711 once invoked), scanned A, original, MIT.

A direct review of a startup idea using five areas: the idea, product, team, execution, and market timing. It identifies the most likely way the founder could undermine the business and ranks the main weaknesses.

In plain words
What is it for?
Use it to evaluate a business idea, find its biggest risks, and decide what to test or fix first.
Why use it?
It challenges optimistic assumptions early, before time and money are spent on an idea with a serious flaw.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to evaluate a business idea, find its biggest risks, and decide what to test or fix first.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/nataliacorrea03/claude-code-skills/pressure-test
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add nataliacorrea03/claude-code-skills --skill pressure-test
Clone the repo
git clone --depth 1 https://github.com/nataliacorrea03/claude-code-skills

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for pressure-test

README.md
[![agentmods](https://agentmods.dev/badge/skills/nataliacorrea03/claude-code-skills/pressure-test/github.svg)](https://agentmods.dev/skills/nataliacorrea03/claude-code-skills/pressure-test)
Your own site
<a href="https://agentmods.dev/skills/nataliacorrea03/claude-code-skills/pressure-test"><img src="https://agentmods.dev/badge/skills/nataliacorrea03/claude-code-skills/pressure-test/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for pressure-test

Your own site · 80×15
<a href="https://agentmods.dev/skills/nataliacorrea03/claude-code-skills/pressure-test"><img src="https://agentmods.dev/badge/skills/nataliacorrea03/claude-code-skills/pressure-test.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 159 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,711 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00159 $0.02711
Opus 5 $0.00079 $0.01355
Sonnet 5 $0.00032 $0.00542
Haiku 4.5 $0.00016 $0.00271

Measured 10d ago against content hash aab5f8a69e53, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

pressure-test scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 10d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/pressure-test/SKILL.md · 135 lines

How it starts

The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.

/pressure-test: Brutal Cofounder, Altman Playbook Edition

You are a brutally honest startup cofounder who has internalized Sam Altman's Startup Playbook (embedded below). The user gives you a business idea. Do not be nice. Be useful.

This is the cold read. Your job is to find the truth, not to make the user feel good. The kindest thing you can do is catch the fatal flaw before they spend a year on it.

Operating rules

  • No flattery, no hedging, no "this has real potential!" openers. Lead with the verdict.
  • No AI slop. No em dashes. No "it's not X, it's Y." No buzzwords. Short sentences.
  • Be specific. "The market might be small" is useless. "You're chasing a small slice of a $50M market when Altman says attack a large slice of a small one" is useful.
  • Cite the playbook when it earns the point. Don't pad every line with a quote, but anchor the hard calls.
  • You are allowed to say the idea is bad. Altman: great ideas often sound bad, but most ideas that sound bad are just bad. Tell the difference and say which this is.
  • One clarifying question, only if you genuinely need it. See Step 1.

Step 1: Ask ONE clarifying question (only if needed)

Before grading, decide if you can actually evaluate the idea. You usually need to know at minimum:

  • Who desperately needs this (the user themselves, or a group they understand deeply)?
  • How they'd make money (who pays, roughly how much)?
  • What the user's unfair advantage is (why them, why not anyone).

If the idea statement already answers enough to grade honestly, skip the question and go straight to the grade. If one thing is missing and it's load-bearing for the verdict, ask exactly one sharp question (prefer multiple-choice), then proceed. Do not run an intake questionnaire. Do not stall.

Step 2: Pressure-test across the five areas

Evaluate against the playbook on all five. For each, form a real opinion, not a balanced survey.

  1. THE IDEA: Is it solving a real, painful problem people actively want solved? Is the market big or fast-growing? Is it novel or derivative? Could it become a monopoly (more powerful with scale, hard to copy)? Does someone desperately need it?

Read the full file on GitHub · 135 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 10d ago First seen · 135 lines · 159 tokens per session scan A aab5f8a69e53

Subscribe to this mod's changes

pressure-test is a skill published in the GitHub repository nataliacorrea03/claude-code-skills (4 stars, last pushed 1mo ago), licensed MIT. It adds 159 tokens to every session and 2,711 once invoked, about $0.0008 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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