# Testing Tdd London Metrics Success Criteria

> Sub-skill of testing-tdd-london: Metrics & Success Criteria.

- Skill: `vamseeachanta/testing-tdd-london-metrics-success-criteria` (Agent Skill)
- Install (CLI): `npx skillmds@latest add vamseeachanta/testing-tdd-london-metrics-success-criteria`
- Raw SKILL.md: https://api.skillmd.com/api/skills/vamseeachanta/testing-tdd-london-metrics-success-criteria/raw
- Safety review: PASS (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: vamseeachanta (https://skillmd.com/u/vamseeachanta)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/vamseeachanta/testing-tdd-london-metrics-success-criteria

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# Metrics & Success Criteria

## Metrics & Success Criteria


| Metric | Target | Description |
|--------|--------|-------------|
| Interaction Coverage | 100% | All collaborator calls verified |
| Mock Isolation | 100% | No real dependencies in unit tests |
| Contract Consistency | 100% | Mocks match real interfaces |
| Test Speed | < 100ms | Per test (no I/O) |