Design test strategies and test plans. Trigger with "how should we test", "test strategy for", "write tests for", "test plan", "what tests do we need", or when the user needs help with testing approaches, coverage, or test architecture.
Install with the open skills CLI (global, non-interactive — available in every Claude Code session):
npx skills add anthropics/knowledge-work-plugins --skill "testing-strategy" -g -a claude-code -yOr manually — copy the SKILL.md below into:
~/.claude/skills/testing-strategy-anthropics/SKILL.md---
name: testing-strategy
description: Design test strategies and test plans. Trigger with "how should we test", "test strategy for", "write tests for", "test plan", "what tests do we need", or when the user needs help with testing approaches, coverage, or test architecture.
---
# Testing Strategy
Design effective testing strategies balancing coverage, speed, and maintenance.
## Testing Pyramid
```
/ E2E \ Few, slow, high confidence
/ Integration \ Some, medium speed
/ Unit Tests \ Many, fast, focused
```
## Strategy by Component Type
- **API endpoints**: Unit tests for business logic, integration tests for HTTP layer, contract tests for consumers
- **Data pipelines**: Input validation, transformation correctness, idempotency tests
- **Frontend**: Component tests, interaction tests, visual regression, accessibility
- **Infrastructure**: Smoke tests, chaos engineering, load tests
## What to Cover
Focus on: business-critical paths, error handling, edge cases, security boundaries, data integrity.
Skip: trivial getters/setters, framework code, one-off scripts.
## Output
Produce a test plan with: what to test, test type for each area, coverage targets, and example test cases. Identify gaps in existing coverage.
Use when facing 2+ independent tasks that can be worked on without shared state or sequential dependencies
Use when encountering any bug, test failure, or unexpected behavior, before proposing fixes
Use when implementing any feature or bugfix, before writing implementation code