Build phase
api-and-interface-design
Guides stable API and interface design. Contract-first design, Hyrum’s Law, the One-Version Rule, error semantics, and boundary validation for REST, GraphQL, and type contracts between modules.
Use when Designing APIs, module boundaries, or public interfaces.
Install just this skill
Grab it on its own via the open skills CLI, or install the whole pack.
This skill only
npx skills add addyosmani/agent-skills --skill api-and-interface-design All skills
npx skills add addyosmani/agent-skills How this skill is structured
Every skill follows the same anatomy - a workflow the agent follows, not a doc it reads.
- 01 Overview What this skill does
- 02 When to Use Triggering conditions
- 03 Process Step-by-step workflow
- 04 Rationalizations Excuses + rebuttals
- 05 Red Flags Signs something’s wrong
- 06 Verification Evidence requirements