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product-thinking

Run structured product thinking exercises before writing a spec. Use this skill when: - You need to think through a feature idea before writing a PRD - You want to run the 11-star experience exercise for a feature - You need a positioning statement using Geoffrey Moore's framework - You want to define product principles and success vision for a new feature - You have a raw feature idea and need to turn it into a structured brief

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Product Thinking

Interactive skill that builds product thinking through 5 structured exercises. Outputs a Product Thinking Brief that feeds into spec writing.

This is the "thinking before writing" layer — run this BEFORE drafting any spec.

Workflow

Gather context — Ask user for: feature idea, target users, motivation
Read source files — Personas, product context, feedback, competitors (only relevant files)
Run 5 exercises — Present findings, get user validation at each step
Write brief — Output to file or print

The 5 Exercises

Exercise 1: Problem Statement

Answer four questions with evidence:

Dimension	What to Answer
Who	Specific persona (not generic "users")
Evidence	Cite feedback, pilot data, research — not assertions
Impact if unsolved	Quantify or describe the cost of inaction
Why unsolved	Technical, behavioral, or systemic barriers

Exercise 2: 11-Star Experience Ladder

For THIS specific feature, describe star levels 1, 3, 5, 7, 9, 11. Identify realistic target for current phase.

See references/11-star-framework.md for the full framework.

Output: Table + "Target Star Level: {N} — {rationale}"

Exercise 3: Positioning Statement

Geoffrey Moore's framework:

"For [target users], who [need/pain], [product/feature] is a [category] that [key benefit]. Unlike [competitors], it [differentiator]."

Pull target users from persona files
Include "current manual process" as a competitor if no direct competitor exists

Exercise 4: Product Principles

Define 3-5 guardrails for this feature:

Principle	Description	Following It	Violating It
e.g., "Offline-first"	Works without internet	Auto-sync when connected	Require internet for core flow

Exercise 5: Success Vision

Answer in 2-3 paragraph narrative:

Done well in 6 months — Describe the ideal outcome
Behavior change expected — How will users act differently?
Kill criteria — What evidence would make us kill this feature?

Output Format

# Product Thinking Brief — {Feature Name}

**Date:** {DD-MM-YYYY}
**Author:** [your name]

## 1. Problem Statement
[table from Exercise 1]

## 2. 11-Star Experience
[table from Exercise 2]
**Target Star Level:** {N} — {rationale}

## 3. Positioning Statement
> For [target users], who [need/pain]...

## 4. Product Principles
[table from Exercise 4]

## 5. Success Vision
[narrative from Exercise 5]

## Next Step
Use this brief as input for your PRD/spec writing skill.

Anti-Patterns

Don't skip the problem statement — it's the foundation
Don't set target star level above 7 for early phases — be realistic
Don't write generic principles — they should be specific enough to be falsifiable
Don't skip kill criteria — knowing when to stop is as important as knowing what to build

Quality Checklist

Problem statement has evidence, not just assertions
11-star ladder is specific to THIS feature, not generic
Positioning statement names a real competitor or current process
Principles are falsifiable (you can tell when they're violated)
Kill criteria are defined

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概要と使いどころ

11-star-framework

無料

Rate any product, feature, or experience on the 11-star scale (Brian Chesky's Airbnb thought experiment). Use when user says "rate this experience", "11-star", "star rating", "experience audit", "how good is this", "experience rating", "product audit", "quality assessment", or wants to evaluate product quality and identify improvement paths. Also trigger when user wants to benchmark a feature, assess where a product stands, or map out what "great" looks like - even if they don't explicitly say "11-star".

日本語の概要は準備中です。原文の説明を表示しています。