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brainstorm-experiments-new

brainstorm-experiments-new is a skill for Claude Code from yuusakuri/agent-skills. It costs 59 tokens per session (574 once invoked), scanned A, a copy of brainstorm-experiments-new, MIT.

A method for testing whether a new product idea is worth pursuing before building the full product. It uses an XYZ hypothesis, such as expecting a specific share of a target group to take a defined action.

In plain words
What is it for?
Use it to plan landing pages, explainer videos, email campaigns, waitlists, pre-orders, or manually delivered trial services for a new product idea.
Why use it?
It helps replace guesses about market demand with evidence gathered through inexpensive tests.

Skill for Claude Code

Written for Claude Code: $ARGUMENTS substitution.

not rated 2repo 14d ago A scan 59 tokens copy · 100% MIT

Good fit Use it to plan landing pages, explainer videos, email campaigns, waitlists, pre-orders, or manually delivered trial services for a new product idea.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/yuusakuri/agent-skills/brainstorm-experiments-new
View source ↗ yuusakuri/agent-skills
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 yuusakuri/agent-skills --skill brainstorm-experiments-new
Clone the repo
git clone --depth 1 https://github.com/yuusakuri/agent-skills

Made for: Claude Code.

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 brainstorm-experiments-new

README.md
[![agentmods](https://agentmods.dev/badge/skills/yuusakuri/agent-skills/brainstorm-experiments-new/github.svg)](https://agentmods.dev/skills/yuusakuri/agent-skills/brainstorm-experiments-new)
Your own site
<a href="https://agentmods.dev/skills/yuusakuri/agent-skills/brainstorm-experiments-new"><img src="https://agentmods.dev/badge/skills/yuusakuri/agent-skills/brainstorm-experiments-new/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 brainstorm-experiments-new

Your own site · 80×15
<a href="https://agentmods.dev/skills/yuusakuri/agent-skills/brainstorm-experiments-new"><img src="https://agentmods.dev/badge/skills/yuusakuri/agent-skills/brainstorm-experiments-new.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 59 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 574 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 100% copy Near-identical to another mod 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 $0.00059 $0.00574
Opus 5.5 $0.00024 $0.00230
Sonnet 5.5 $0.00012 $0.00115
Haiku 4.5 $0.00006 $0.00057

Measured 2mo ago against content hash fe66d9ba76cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

brainstorm-experiments-new 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 2mo 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.

Origin

This is a copy

100% identical to brainstorm-experiments-new — 0 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/brainstorm-experiments-new/SKILL.md · 46 lines

How it starts

The opening of the file, as written. The whole thing — 46 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Design Lean Startup Experiments (New Product)

Create XYZ hypotheses and design pretotype experiments to validate a new product concept with minimal effort.

Context

You are helping validate a new product concept: $ARGUMENTS using lean startup methodology.

If the user provides files (market research, landing page mockups), read them first.

Instructions

  1. Create an XYZ Hypothesis in the form: "At least X% of Y will do Z"

    • X%: The percentage of the target market expected to engage
    • Y: The specific target market (e.g., "mid-size luxury sedan buyers")
    • Z: How they will engage with the product

  2. Suggest 2-3 pretotype experiments to test the hypothesis with minimal effort. Consider:

    • Landing Page: Test interest by measuring sign-ups or clicks
    • Explainer Video: Test understanding and appeal through engagement metrics
    • Email Campaign: Test demand through response and click-through rates
    • Pre-Order / Waitlist: Test willingness to pay through skin-in-the-game commitment
    • Concierge / Manual MVP: Deliver the service manually to test value

  3. Key principles (Alberto Savoia, The Right It):

    • Skin-in-the-Game: Test willingness to pay — not just interest. Real commitment (time, money, reputation) is the only reliable signal.
    • Your Own Data (YODA): Collect your own data through experiments rather than relying on Others' Data (ODP) like market reports or analogies. "The market for your idea does not care about the market for someone else's idea."
    • Measure actual behavior, not users' opinions

  4. For each experiment, specify the hypothesis being tested, the method, the metric, and the success threshold.

Think step by step. Save as markdown if substantial.

Further Reading

Read the full file on GitHub · 46 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. 2mo ago First seen · 46 lines · 59 tokens per session scan A fe66d9ba76cf

Subscribe to this mod's changes

brainstorm-experiments-new is a skill published in the GitHub repository yuusakuri/agent-skills (2 stars, last pushed 14d ago), licensed MIT. It adds 59 tokens to every session and 574 once invoked, about $0.0002 per session on Opus 5.5. A static security scan graded it A with 0 findings. It is 100% identical to brainstorm-experiments-new, differing in 0 lines, and is treated as a copy.

Marketing and SEOPlanning
Related

brainstorm-experiments-new compared with skills from other repositories

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