lean-startup

lean-startup is a skill for Claude Code, Codex from ironyjk/strategy-frameworks. It costs 42 tokens per session (4,788 once invoked), scanned A, original, MIT.

A way to develop products by building a small test version, measuring how people respond, and learning what to change. An MVP is the smallest version that can test an idea.

In plain words
What is it for?
Use it to design experiments, evaluate an early product, and decide whether to change direction or continue.
Why use it?
It reduces the risk of spending time and money on something customers do not want by testing assumptions early.

Skill for Claude CodeCodex

Part of the strategy-frameworks plugin — 27 skills shipped together

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.

agentmods
npx agentmods add skills/ironyjk/strategy-frameworks/lean-startup
Any agent
npx skills add ironyjk/strategy-frameworks --skill lean-startup
Clone the repo
git clone --depth 1 https://github.com/ironyjk/strategy-frameworks

Made for: Claude Code, Codex.

Or install strategy-frameworks, the plugin that ships this one along with the rest of its 27 skills.

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 lean-startup

README.md
[![agentmods](https://agentmods.dev/badge/skills/ironyjk/strategy-frameworks/lean-startup.svg)](https://agentmods.dev/skills/ironyjk/strategy-frameworks/lean-startup)
Your own site
<a href="https://agentmods.dev/skills/ironyjk/strategy-frameworks/lean-startup"><img src="https://agentmods.dev/badge/skills/ironyjk/strategy-frameworks/lean-startup.svg" alt="Measured on agentmods" height="20"></a>
Per session 42 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 4,788 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
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 $0.00042 $0.04788
Opus 5 $0.00021 $0.02394
Sonnet 5 $0.00008 $0.00958
Haiku 4.5 $0.00004 $0.00479

Measured 5d ago against content hash 63f260f2a4c0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

lean-startup 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 5d 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.

lean-startup/SKILL.md · 423 lines

How it starts

The opening of the file, as written. The whole thing — 423 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Lean Startup Framework (린 스타트업)

"The only way to win is to learn faster than anyone else." — Eric Ries

1. Core Philosophy (핵심 철학)

Validated Learning over Intuition (검증된 학습 > 직감)

린 스타트업은 도요타 린 제조(Lean Manufacturing)의 원칙을 신규 사업과 혁신에 적용한 프레임워크다.

Three Pillars (3대 원칙)

  1. Validated Learning (검증된 학습) — 고객으로부터 직접 검증된 학습만이 진짜 진전이다
  2. Eliminate Waste (낭비 제거) — 고객이 원하지 않는 것을 만드는 것이 최대 낭비
  3. Scientific Experimentation (과학적 실험) — 가설 → 실험 → 측정 → 학습의 반복

Key Insight (핵심 통찰)

  • 대부분의 스타트업은 제품을 잘못 만들어서가 아니라, 아무도 원하지 않는 것을 만들어서 실패한다
  • 불확실성이 높을수록 계획(plan)보다 학습(learn)이 중요하다
  • 실패는 나쁜 것이 아니다 — **빨리 실패하고 빨리 배우는 것(Fail Fast, Learn Fast)**이 핵심

2. Build-Measure-Learn Loop (구축-측정-학습 루프)

린 스타트업의 핵심 엔진. 이 피드백 루프를 최대한 빠르게 돌리는 것이 목표다.

    ┌─────────────────────────────────────────────┐
    │                                             │
    │   ╔═══════════╗     PLANNING direction      │
    │   ║  IDEAS    ║ ←───────────────────────┐   │
    │   ║  (아이디어) ║                         │   │
    │   ╚═════╤═════╝                         │   │
    │         │                               │   │
    │         │  BUILD (구축)                   │   │
    │         │  • Code MVP                   │   │
    │         │  • Design experiment          │   │
    │         ▼                               │   │
    │   ╔═══════════╗                         │   │
    │   ║ PRODUCT   ║                         │   │
    │   ║ (제품/MVP) ║                         │   │
    │   ╚═════╤═════╝                         │   │
    │         │                               │   │
    │         │  MEASURE (측정)                 │   │
    │         │  • A/B test                   │   │
    │         │  • Cohort analysis            │   │
    │         ▼                               │   │
    │   ╔═══════════╗                         │   │
    │   ║   DATA    ║                         │   │
    │   ║  (데이터)  ║                         │   │
    │   ╚═════╤═════╝                         │   │
    │         │                               │   │
    │         │  LEARN (학습)                   │   │
    │         │  • Validate/invalidate        │   │
    │         │  • Pivot or persevere?        │   │
    │         ▼                               │   │
    │   ╔═══════════╗                         │   │
    │   ║ LEARNING  ║─────────────────────────┘   │
    │   ║  (학습)    ║                             │
    │   ╚═══════════╝     EXECUTION direction     │
    │                                             │
    └─────────────────────────────────────────────┘

Read the full file on GitHub · 423 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. 5d ago First seen · 423 lines · 42 tokens per session scan A 63f260f2a4c0

Subscribe to this mod's changes

lean-startup is a skill published in the GitHub repository ironyjk/strategy-frameworks (11 stars, last pushed 4mo ago), licensed MIT. It adds 42 tokens to every session and 4,788 once invoked, about $0.0002 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 2026-08-30.

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