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skills

by wondelai · wondelai/skills

48 book-derived agent skills — Clean Code, DDIA, JTBD, Hooked, Made to Stick — turning canonical texts into actionable pair-programming and thinking partners.

A collection of 48 skills across product strategy, UX design, marketing, sales, innovation, strategy, team, and software craftsmanship. Each skill distills a canonical book (Clean Code, Refactoring, DDIA, Mom Test, Influence, Crossing the Chasm, Lean Startup, etc.) into an applicable SKILL-style interaction. Installable via Claude Code plugin marketplace, skills.sh, or npm.

▶ Watch demo 📦 Install 💡 Use Cases

Why use it

Key features

Live Demo

What it looks like in practice

skills-skill.replay ▶ ready
0/0

Install

Author repository · Claude Skills documentation

Use Cases

Real-world ways to use skills

Refactor a legacy module using the Clean Code + Refactoring patterns

👤 Senior developers tackling legacy code ⏱ ~120 min advanced

When to use: You're about to touch a 500-line god-class and want principled guidance.

Flow
  1. Assess with Clean Code lens
    Use the Clean Code skill. Review this file — what SOLID violations are present?✓ Copied
    → Concrete violations named after principles, not vibes
  2. Plan with Refactoring patterns
    Use the Refactoring Patterns skill. Plan the refactor using Extract Class and Replace Conditional with Polymorphism.✓ Copied
    → Named Fowler refactorings with stepwise plan
  3. Execute incrementally
    Apply the first step; run tests; repeat.✓ Copied
    → Small safe steps, not one giant rewrite

Outcome: A refactor defensible in code review with explicit principles.

Pitfalls
  • Refactor without tests = risk — Skill insists on characterization tests first
Combine with: claude-skill-2

Run Mom Test-style customer interviews

👤 Founders validating a product idea ⏱ ~45 min intermediate

When to use: Before writing any code, you need to pressure-test the problem.

Flow
  1. Plan the interview
    Use the Mom Test skill. I want to validate [idea]. Help me draft questions that avoid bias.✓ Copied
    → Questions focused on past behavior, not hypothetical future
  2. Debrief after calls
    Here are notes from 5 calls. Apply the Mom Test frame — what's signal vs compliment?✓ Copied
    → Honest separation of validated evidence from polite agreement

Outcome: Interview notes you can actually make a decision on.

Pitfalls
  • Customer says 'I'd buy that' — skill flags this as worthless without behavior evidence — Trust the frame; push for past behavior
Combine with: product-manager-skill

Design a system using DDIA + System Design skills

👤 Senior engineers and architects ⏱ ~90 min advanced

When to use: You're whiteboarding a new service and want depth, not hand-waving.

Flow
  1. State constraints
    Use the DDIA and System Design skills. Design a real-time leaderboard for 5M users. Discuss reliability, scalability, maintainability.✓ Copied
    → Tradeoffs from DDIA vocabulary (replication, partitioning, consistency)
  2. Pressure-test
    Apply the Release It! skill — what failure modes should I anticipate?✓ Copied
    → Stability patterns (circuit breaker, bulkhead, timeout) named explicitly

Outcome: A design doc that a staff engineer would take seriously.

Pitfalls
  • Skills can over-index on book vocabulary — Insist on concrete numbers — latency targets, QPS, data sizes

Combinations

Pair with other MCPs for X10 leverage

skills-skill + product-manager-skill

Books-based discovery + PM deliverable templates

Use Mom Test skill for the interview plan, then the product-manager-skill to turn findings into a PRD.✓ Copied
skills-skill + claude-skill-2

Clean Code / Refactoring skill for principles + full-stack skill for implementation

Refactor the auth module guided by the Clean Code skill; implement with the NestJS skill from claude-skill-2.✓ Copied

Tools

What this MCP exposes

ToolInputsWhen to callCost
Code Craftsmanship skills (14) code to review/design Code quality, architecture, design work 0
UX Design skills (8) design problem UI/UX decisions 0
Product Strategy skills (4) product question Discovery, framing 0
Marketing & CRO skills (4) marketing question Messaging, landing pages 0
Strategy & Growth skills (4) strategy question Market/strategy decisions 0

Cost & Limits

What this costs to run

API quota
None
Tokens per call
2-6k per skill
Monetary
Free — skill is local
Tip
Pick one book-skill per task; stacking too many blurs recommendations.

Security

Permissions, secrets, blast radius

Credential storage: No credentials — skill is prompts
Data egress: None

Troubleshooting

Common errors and fixes

Skill quotes principles but doesn't apply them

Force application: 'apply this principle to THIS line of my code, not in general'.

Not obvious which skill to invoke

The README maps problems to skills — start there.

Alternatives

skills vs others

AlternativeWhen to use it insteadTradeoff
Reading the books directlyYou want depth and have timeMore depth, no interactive application
product-manager-skill / claude-skill-2You want deliverable templates or framework code, not book wisdomDifferent modality

More

Resources

📖 Read the official README on GitHub

🐙 Browse open issues

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