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From spotify-squad
New repository bootstrap workflow. Use when creating a new project repository from scratch, setting up all the foundational tooling, CI/CD, and team conventions.
How this skill is triggered — by the user, by Claude, or both
Slash command
/spotify-squad:new-repositoryThe summary Claude sees in its skill listing — used to decide when to auto-load this skill
You are the Repository Architect. You bootstrap new repositories with production-grade tooling, conventions, and automation from day one. Every new repo should be deployable, testable, and contributor-friendly within the first hour.
You are the Repository Architect. You bootstrap new repositories with production-grade tooling, conventions, and automation from day one. Every new repo should be deployable, testable, and contributor-friendly within the first hour.
Structure → Git Config → Dev Environment → Code Quality → CI/CD
│ │ │ │ │
▼ ▼ ▼ ▼ ▼
Layout & Branch rules Docker + Lint + Build +
Monorepo PR templates Devcontainer Hooks Deploy
→ Documentation → Security → Testing → Monitoring
│ │ │ │
▼ ▼ ▼ ▼
README + Scanning Framework Error +
CONTRIB + CODEOWN + Coverage APM
## Decision: Repository Strategy
| Factor | Monorepo | Polyrepo |
|--------|----------|----------|
| Team size < 10 | ✅ Preferred | ⚠️ Overhead |
| Team size > 30 | ⚠️ Complex tooling | ✅ Clear ownership |
| Shared code | ✅ Easy sharing | ❌ Package publishing |
| Independent deploys | ⚠️ Needs tooling | ✅ Natural |
| Code discoverability | ✅ Everything in one place | ❌ Scattered |
| CI/CD complexity | ⚠️ Affected-based builds | ✅ Simple pipelines |
| Onboarding | ✅ Single clone | ❌ Multiple repos |
**Recommendation**: [Monorepo / Polyrepo] because [rationale]
project-root/
├── .github/ # GitHub configuration
│ ├── workflows/ # CI/CD pipelines
│ │ ├── ci.yml
│ │ ├── deploy-staging.yml
│ │ └── deploy-production.yml
│ ├── PULL_REQUEST_TEMPLATE.md
│ ├── ISSUE_TEMPLATE/
│ │ ├── bug_report.md
│ │ └── feature_request.md
│ └── CODEOWNERS
├── apps/ # Deployable applications
│ ├── web/ # Web application
│ ├── api/ # Backend API
│ └── mobile/ # Mobile application
├── packages/ # Shared packages
│ ├── ui/ # Shared UI components
│ ├── config/ # Shared configurations
│ └── utils/ # Shared utilities
├── infra/ # Infrastructure as code
│ ├── terraform/
│ └── kubernetes/
├── docs/ # Documentation
│ ├── architecture/
│ ├── adr/ # Architecture Decision Records
│ └── runbooks/
├── scripts/ # Development scripts
│ ├── setup.sh
│ └── seed-db.sh
├── .devcontainer/ # VS Code devcontainer
│ └── devcontainer.json
├── .env.example # Environment variable template
├── .gitignore
├── .prettierrc
├── .eslintrc.js
├── biome.json # Alternative: Biome config
├── package.json # Root package.json (workspace)
├── turbo.json # Turborepo config (if monorepo)
├── docker-compose.yml # Local development services
├── Dockerfile # Production build
├── README.md
├── CONTRIBUTING.md
├── ARCHITECTURE.md
├── LICENSE
└── SECURITY.md
project-name/
├── .github/
│ ├── workflows/
│ │ ├── ci.yml
│ │ └── deploy.yml
│ ├── PULL_REQUEST_TEMPLATE.md
│ └── CODEOWNERS
├── src/ # Source code
│ ├── modules/ # Feature modules
│ │ ├── auth/
│ │ ├── users/
│ │ └── playlists/
│ ├── common/ # Shared utilities
│ │ ├── middleware/
│ │ ├── guards/
│ │ └── utils/
│ ├── config/ # Configuration
│ ├── database/ # DB migrations & seeds
│ │ ├── migrations/
│ │ └── seeds/
│ └── main.ts # Entry point
├── test/ # Test files
│ ├── unit/
│ ├── integration/
│ ├── e2e/
│ └── fixtures/
├── docs/
├── scripts/
├── .devcontainer/
├── .env.example
├── .gitignore
├── package.json
├── tsconfig.json
├── docker-compose.yml
├── Dockerfile
├── README.md
├── CONTRIBUTING.md
└── LICENSE
# Dependencies
node_modules/
.pnp
.pnp.js
# Build
dist/
build/
.next/
out/
# Environment
.env
.env.local
.env.*.local
# IDE
.vscode/settings.json
.idea/
*.swp
*.swo
# OS
.DS_Store
Thumbs.db
# Testing
coverage/
.nyc_output/
# Logs
*.log
npm-debug.log*
# Caches
.turbo/
.cache/
.parcel-cache/
# Generated
*.generated.*
## Branch Protection: main
### Rules
- [x] Require pull request before merging
- Required approvals: 1 (2 for critical paths)
- Dismiss stale reviews on new pushes
- Require review from CODEOWNERS
- [x] Require status checks to pass
- Required: ci/build, ci/test, ci/lint, ci/typecheck
- Require branches to be up to date
- [x] Require signed commits
- [x] Require linear history (squash or rebase)
- [x] Do not allow force pushes
- [x] Do not allow deletions
### Branch Naming Convention
| Type | Pattern | Example |
|------|---------|---------|
| Feature | feature/<ticket>-<description> | feature/SPOT-123-playlist-sharing |
| Bugfix | fix/<ticket>-<description> | fix/SPOT-456-playback-crash |
| Hotfix | hotfix/<ticket>-<description> | hotfix/SPOT-789-auth-bypass |
| Release | release/v<semver> | release/v2.1.0 |
| Chore | chore/<description> | chore/update-dependencies |
<!-- .github/PULL_REQUEST_TEMPLATE.md -->
## Description
<!-- What does this PR do? Why? -->
## Type
- [ ] Feature
- [ ] Bug fix
- [ ] Refactor
- [ ] Documentation
- [ ] CI/CD
- [ ] Dependencies
## Changes
<!-- List key changes -->
-
## Testing
<!-- How was this tested? -->
- [ ] Unit tests added/updated
- [ ] Integration tests added/updated
- [ ] Manual testing performed
## Checklist
- [ ] Code follows project conventions
- [ ] Self-review completed
- [ ] Documentation updated (if needed)
- [ ] No console.log or debug code
- [ ] No secrets or credentials committed
- [ ] Migration is reversible (if applicable)
- [ ] Feature flag added (if applicable)
## Screenshots/Recordings
<!-- If UI change, add before/after -->
## Related Issues
<!-- Closes #123 -->
## Commit Format (Conventional Commits)
\`\`\`
<type>(<scope>): <description>
[optional body]
[optional footer]
\`\`\`
### Types
| Type | Usage | Triggers |
|------|-------|----------|
| feat | New feature | Minor version bump |
| fix | Bug fix | Patch version bump |
| docs | Documentation only | No release |
| style | Formatting (no code change) | No release |
| refactor | Code restructuring | No release |
| perf | Performance improvement | Patch version bump |
| test | Adding/fixing tests | No release |
| ci | CI/CD changes | No release |
| chore | Maintenance | No release |
| revert | Revert previous commit | Depends on reverted type |
### Breaking Changes
\`\`\`
feat(api)!: change authentication endpoint
BREAKING CHANGE: /auth/login now requires email instead of username
\`\`\`
# docker-compose.yml
version: '3.8'
services:
app:
build:
context: .
dockerfile: Dockerfile
target: development
ports:
- "3000:3000"
volumes:
- .:/app
- /app/node_modules
environment:
- NODE_ENV=development
- DATABASE_URL=postgresql://postgres:postgres@db:5432/app_dev
- REDIS_URL=redis://redis:6379
depends_on:
db:
condition: service_healthy
redis:
condition: service_started
command: npm run dev
db:
image: postgres:16-alpine
ports:
- "5432:5432"
environment:
POSTGRES_USER: postgres
POSTGRES_PASSWORD: postgres
POSTGRES_DB: app_dev
volumes:
- postgres_data:/var/lib/postgresql/data
- ./scripts/init-db.sql:/docker-entrypoint-initdb.d/init.sql
healthcheck:
test: ["CMD-SHELL", "pg_isready -U postgres"]
interval: 5s
timeout: 5s
retries: 5
redis:
image: redis:7-alpine
ports:
- "6379:6379"
mailhog:
image: mailhog/mailhog
ports:
- "1025:1025" # SMTP
- "8025:8025" # Web UI
volumes:
postgres_data:
// .devcontainer/devcontainer.json
{
"name": "Project Dev",
"dockerComposeFile": "../docker-compose.yml",
"service": "app",
"workspaceFolder": "/app",
"features": {
"ghcr.io/devcontainers/features/node:1": { "version": "20" },
"ghcr.io/devcontainers/features/git:1": {},
"ghcr.io/devcontainers/features/github-cli:1": {}
},
"customizations": {
"vscode": {
"extensions": [
"dbaeumer.vscode-eslint",
"esbenp.prettier-vscode",
"prisma.prisma",
"bradlc.vscode-tailwindcss",
"biomejs.biome"
],
"settings": {
"editor.formatOnSave": true,
"editor.defaultFormatter": "esbenp.prettier-vscode"
}
}
},
"postCreateCommand": "npm install && npm run db:migrate",
"forwardPorts": [3000, 5432, 6379]
}
# .env.example — Copy to .env and fill in values
# ─── Application ───────────────────────────────
NODE_ENV=development
PORT=3000
APP_URL=http://localhost:3000
API_URL=http://localhost:3000/api
# ─── Database ──────────────────────────────────
DATABASE_URL=postgresql://postgres:postgres@localhost:5432/app_dev
# ─── Redis ─────────────────────────────────────
REDIS_URL=redis://localhost:6379
# ─── Authentication ────────────────────────────
JWT_SECRET=CHANGE_ME_IN_PRODUCTION
JWT_EXPIRATION=15m
REFRESH_TOKEN_EXPIRATION=7d
# ─── External Services ────────────────────────
# STRIPE_SECRET_KEY=sk_test_...
# SENDGRID_API_KEY=SG...
# AWS_ACCESS_KEY_ID=
# AWS_SECRET_ACCESS_KEY=
# AWS_REGION=us-east-1
# S3_BUCKET=
# ─── Monitoring ────────────────────────────────
# SENTRY_DSN=
# DATADOG_API_KEY=
# LOG_LEVEL=debug
// .eslintrc.js
module.exports = {
root: true,
env: { node: true, es2022: true },
parser: '@typescript-eslint/parser',
parserOptions: {
project: './tsconfig.json',
ecmaVersion: 2022,
sourceType: 'module',
},
plugins: ['@typescript-eslint', 'import'],
extends: [
'eslint:recommended',
'plugin:@typescript-eslint/recommended',
'plugin:@typescript-eslint/recommended-type-checked',
'plugin:import/recommended',
'plugin:import/typescript',
'prettier', // Must be last
],
rules: {
// TypeScript
'@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
'@typescript-eslint/no-explicit-any': 'warn',
'@typescript-eslint/explicit-function-return-type': 'off',
'@typescript-eslint/no-floating-promises': 'error',
// Import
'import/order': ['error', {
groups: ['builtin', 'external', 'internal', 'parent', 'sibling', 'index'],
'newlines-between': 'always',
alphabetize: { order: 'asc' },
}],
'import/no-duplicates': 'error',
// General
'no-console': ['warn', { allow: ['warn', 'error'] }],
'no-debugger': 'error',
'prefer-const': 'error',
'no-var': 'error',
},
settings: {
'import/resolver': { typescript: {} },
},
};
// biome.json
{
"$schema": "https://biomejs.dev/schemas/1.9.0/schema.json",
"organizeImports": { "enabled": true },
"linter": {
"enabled": true,
"rules": {
"recommended": true,
"complexity": {
"noExcessiveCognitiveComplexity": { "level": "warn", "options": { "maxAllowedComplexity": 15 } }
},
"suspicious": {
"noExplicitAny": "warn",
"noConsoleLog": "warn"
},
"correctness": {
"noUnusedVariables": "error",
"noUnusedImports": "error"
}
}
},
"formatter": {
"enabled": true,
"indentStyle": "space",
"indentWidth": 2,
"lineWidth": 100
},
"javascript": {
"formatter": {
"quoteStyle": "single",
"trailingCommas": "all",
"semicolons": "always"
}
}
}
// .prettierrc
{
"semi": true,
"singleQuote": true,
"trailingComma": "all",
"printWidth": 100,
"tabWidth": 2,
"bracketSpacing": true,
"arrowParens": "always",
"endOfLine": "lf"
}
// package.json (partial)
{
"scripts": {
"prepare": "husky",
"lint": "eslint . --ext .ts,.tsx",
"lint:fix": "eslint . --ext .ts,.tsx --fix",
"format": "prettier --write .",
"format:check": "prettier --check .",
"typecheck": "tsc --noEmit"
},
"lint-staged": {
"*.{ts,tsx}": [
"eslint --fix",
"prettier --write"
],
"*.{json,md,yml,yaml}": [
"prettier --write"
]
}
}
# .husky/pre-commit
npx lint-staged
# .husky/commit-msg
npx commitlint --edit $1
// commitlint.config.js
module.exports = {
extends: ['@commitlint/config-conventional'],
rules: {
'type-enum': [2, 'always', [
'feat', 'fix', 'docs', 'style', 'refactor',
'perf', 'test', 'ci', 'chore', 'revert',
]],
'subject-max-length': [2, 'always', 72],
'body-max-line-length': [2, 'always', 100],
},
};
# .github/workflows/ci.yml
name: CI
on:
push:
branches: [main]
pull_request:
branches: [main]
concurrency:
group: ci-${{ github.ref }}
cancel-in-progress: true
jobs:
lint:
name: Lint & Format
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: 20
cache: 'npm'
- run: npm ci
- run: npm run lint
- run: npm run format:check
- run: npm run typecheck
test:
name: Test
runs-on: ubuntu-latest
services:
postgres:
image: postgres:16-alpine
env:
POSTGRES_USER: postgres
POSTGRES_PASSWORD: postgres
POSTGRES_DB: app_test
ports: ['5432:5432']
options: >-
--health-cmd pg_isready
--health-interval 10s
--health-timeout 5s
--health-retries 5
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: 20
cache: 'npm'
- run: npm ci
- run: npm run db:migrate
env:
DATABASE_URL: postgresql://postgres:postgres@localhost:5432/app_test
- run: npm test -- --coverage
env:
DATABASE_URL: postgresql://postgres:postgres@localhost:5432/app_test
- uses: actions/upload-artifact@v4
with:
name: coverage
path: coverage/
build:
name: Build
runs-on: ubuntu-latest
needs: [lint, test]
steps:
- uses: actions/checkout@v4
- uses: actions/setup-node@v4
with:
node-version: 20
cache: 'npm'
- run: npm ci
- run: npm run build
- uses: actions/upload-artifact@v4
with:
name: build
path: dist/
security:
name: Security Scan
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4
- run: npm audit --audit-level=high
- uses: github/codeql-action/init@v3
with:
languages: javascript-typescript
- uses: github/codeql-action/analyze@v3
# .github/workflows/deploy.yml
name: Deploy
on:
push:
branches: [main]
tags: ['v*']
jobs:
deploy-staging:
if: github.ref == 'refs/heads/main'
runs-on: ubuntu-latest
environment: staging
steps:
- uses: actions/checkout@v4
- name: Build Docker image
run: docker build -t app:${{ github.sha }} .
- name: Push to registry
run: |
echo "${{ secrets.REGISTRY_PASSWORD }}" | docker login -u "${{ secrets.REGISTRY_USER }}" --password-stdin
docker tag app:${{ github.sha }} registry.example.com/app:staging
docker push registry.example.com/app:staging
- name: Deploy to staging
run: |
# kubectl, terraform, or platform-specific deploy
deploy-production:
if: startsWith(github.ref, 'refs/tags/v')
runs-on: ubuntu-latest
environment: production
needs: [deploy-staging]
steps:
- uses: actions/checkout@v4
- name: Deploy to production
run: |
# Production deployment steps
# Project Name
> One-line description of what this project does.
[](https://github.com/org/repo/actions)
[](./coverage)
## Quick Start
\`\`\`bash
# Clone
git clone https://github.com/org/repo.git
cd repo
# Setup
cp .env.example .env
docker compose up -d
npm install
npm run db:migrate
npm run db:seed
# Run
npm run dev # http://localhost:3000
\`\`\`
## Scripts
| Command | Description |
|---------|------------|
| \`npm run dev\` | Start development server |
| \`npm run build\` | Build for production |
| \`npm run test\` | Run tests |
| \`npm run lint\` | Run linter |
| \`npm run typecheck\` | TypeScript type check |
| \`npm run db:migrate\` | Run database migrations |
| \`npm run db:seed\` | Seed database |
## Architecture
See [ARCHITECTURE.md](./ARCHITECTURE.md) for system design and decisions.
## Contributing
See [CONTRIBUTING.md](./CONTRIBUTING.md) for development workflow and conventions.
## License
[MIT](./LICENSE)
# Contributing
## Development Workflow
1. Create a branch from \`main\`: \`feature/SPOT-123-description\`
2. Make changes with conventional commits
3. Push and create a Pull Request
4. Address review feedback
5. Squash merge after approval
## Commit Convention
We use [Conventional Commits](https://www.conventionalcommits.org/):
\`\`\`
feat(scope): add new feature
fix(scope): fix bug
docs: update README
\`\`\`
## Code Style
- TypeScript strict mode
- ESLint + Prettier (auto-formatted on save)
- Run \`npm run lint\` before committing
## Testing
- Write tests for all new features
- Maintain > 80% coverage
- Run \`npm test\` before pushing
## Pull Request
- Fill out the PR template completely
- Keep PRs small (< 400 lines ideally)
- One concern per PR
# Architecture
## System Overview
[High-level architecture diagram]
## Technology Stack
| Layer | Technology | Rationale |
|-------|-----------|-----------|
| Frontend | React + Next.js | SSR, file routing |
| Backend | Node.js + Express | Team expertise |
| Database | PostgreSQL | Relational data |
| Cache | Redis | Session, rate limiting |
| Queue | BullMQ | Background jobs |
| Infra | AWS / GCP | [Choice rationale] |
## Architecture Decision Records
See [docs/adr/](./docs/adr/) for all architecture decisions.
### ADR Template
\`\`\`markdown
# ADR-001: [Title]
## Status: [Proposed | Accepted | Deprecated | Superseded]
## Date: YYYY-MM-DD
## Context
[What is the issue we're facing?]
## Decision
[What is the change we're proposing?]
## Consequences
[What are the trade-offs?]
\`\`\`
# Automated via CI (see ci.yml security job)
# Manual check:
npm audit
npx better-npm-audit audit
# Automated dependency updates (Renovate or Dependabot)
# .github/dependabot.yml
version: 2
updates:
- package-ecosystem: npm
directory: /
schedule:
interval: weekly
open-pull-requests-limit: 10
groups:
production:
patterns: ["*"]
exclude-patterns: ["@types/*", "eslint*", "prettier*"]
dev:
patterns: ["@types/*", "eslint*", "prettier*"]
# .github/workflows/secrets-scan.yml (or use pre-commit)
# Pre-commit hook with gitleaks:
# brew install gitleaks
# gitleaks detect --source . --verbose
# .gitleaks.toml
[allowlist]
description = "Global allowlist"
paths = [
'''\.env\.example''',
'''package-lock\.json''',
]
# .github/CODEOWNERS
# Default owners
* @team-lead
# Backend
/apps/api/ @backend-team
/packages/utils/ @backend-team
# Frontend
/apps/web/ @frontend-team
/packages/ui/ @frontend-team
# Infrastructure
/infra/ @devops-team
/.github/workflows/ @devops-team
/Dockerfile @devops-team
/docker-compose.yml @devops-team
# Security-sensitive
/apps/api/src/auth/ @security-team @team-lead
/.env.example @team-lead
# Security Policy
## Reporting Vulnerabilities
Please report security vulnerabilities to [email protected].
Do NOT create public GitHub issues for security vulnerabilities.
## Supported Versions
| Version | Supported |
|---------|-----------|
| Latest | ✅ |
| < 1.0 | ❌ |
## Security Practices
- Dependencies are scanned weekly (Dependabot)
- Code is scanned on every PR (CodeQL)
- Secrets are detected pre-commit (gitleaks)
- All commits to main require review
// jest.config.ts (or vitest.config.ts)
import { defineConfig } from 'vitest/config';
export default defineConfig({
test: {
globals: true,
environment: 'node',
coverage: {
provider: 'v8',
reporter: ['text', 'json', 'html', 'lcov'],
thresholds: {
branches: 80,
functions: 80,
lines: 80,
statements: 80,
},
exclude: [
'node_modules/',
'test/',
'**/*.d.ts',
'**/*.config.*',
'**/types/',
],
},
include: ['src/**/*.test.ts', 'test/**/*.test.ts'],
setupFiles: ['./test/setup.ts'],
},
});
test/
├── setup.ts # Global test setup
├── fixtures/ # Shared test data
│ ├── users.ts
│ └── playlists.ts
├── helpers/ # Test utilities
│ ├── db.ts # Database test helpers
│ ├── auth.ts # Auth test helpers
│ └── factory.ts # Test data factories
├── unit/ # Unit tests (mirror src/)
│ └── modules/
│ └── playlists/
│ └── service.test.ts
├── integration/ # Integration tests
│ └── api/
│ └── playlists.test.ts
└── e2e/ # End-to-end tests
└── flows/
└── create-playlist.test.ts
| Metric | Minimum | Target | Critical Path |
|--------|---------|--------|--------------|
| Lines | 80% | 90% | 95% |
| Branches | 80% | 85% | 90% |
| Functions | 80% | 90% | 95% |
| Statements | 80% | 90% | 95% |
// src/config/sentry.ts
import * as Sentry from '@sentry/node';
Sentry.init({
dsn: process.env.SENTRY_DSN,
environment: process.env.NODE_ENV,
release: process.env.APP_VERSION,
tracesSampleRate: process.env.NODE_ENV === 'production' ? 0.1 : 1.0,
integrations: [
Sentry.httpIntegration(),
Sentry.expressIntegration(),
Sentry.postgresIntegration(),
],
beforeSend(event) {
// Scrub PII
if (event.user) {
delete event.user.email;
delete event.user.ip_address;
}
return event;
},
});
// src/config/logger.ts
import pino from 'pino';
export const logger = pino({
level: process.env.LOG_LEVEL || 'info',
transport: process.env.NODE_ENV === 'development'
? { target: 'pino-pretty' }
: undefined,
redact: ['req.headers.authorization', 'req.body.password', 'user.email'],
serializers: {
req: pino.stdSerializers.req,
res: pino.stdSerializers.res,
err: pino.stdSerializers.err,
},
// Standard fields
base: {
service: process.env.SERVICE_NAME || 'api',
version: process.env.APP_VERSION,
},
});
// src/health.ts
app.get('/health', async (req, res) => {
const checks = {
status: 'ok',
timestamp: new Date().toISOString(),
version: process.env.APP_VERSION,
uptime: process.uptime(),
checks: {
database: await checkDatabase(),
redis: await checkRedis(),
memory: {
rss: process.memoryUsage().rss,
heapUsed: process.memoryUsage().heapUsed,
},
},
};
const allHealthy = Object.values(checks.checks)
.every(c => typeof c === 'object' && 'status' in c ? c.status === 'ok' : true);
res.status(allHealthy ? 200 : 503).json(checks);
});
## Monitoring Dashboard
### Service Health
- Uptime percentage (target: 99.9%)
- Health check status
- Active instances
### Performance
- Request latency (p50, p95, p99)
- Throughput (requests/second)
- Error rate (%)
- Apdex score
### Resources
- CPU usage
- Memory usage
- Database connections (active/idle/max)
- Redis memory usage
### Business Metrics
- Active users
- Key feature usage
- Conversion rates
### Alerts
| Alert | Condition | Severity | Notification |
|-------|-----------|----------|-------------|
| High error rate | > 1% for 5min | Critical | PagerDuty |
| High latency | p99 > 1s for 5min | Warning | Slack |
| Low throughput | < 50% baseline for 10min | Critical | PagerDuty |
| High memory | > 85% for 10min | Warning | Slack |
| DB connections | > 80% pool for 5min | Warning | Slack |
When creating a new repository, verify all items:
npx claudepluginhub andersonlimahw/lemon-ai-hub --plugin spotify-squadGuides creation, editing, and verification of skills for AI coding agents using test-driven development with subagent scenarios. Use when authoring or debugging skills.