# API And Interface Design

> Design APIs and module boundaries with explicit contracts, compatibility rules, and error semantics. Use for public interfaces and service boundaries.

- Skill: `agent-packs/api-and-interface-design` (Agent Skill)
- Install (CLI): `npx skillmds@latest add agent-packs/api-and-interface-design`
- Raw SKILL.md: https://api.skillmd.com/api/skills/agent-packs/api-and-interface-design/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Integrations & APIs
- License: MIT
- Author: agent-packs (https://skillmd.com/u/agent-packs)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/agent-packs/api-and-interface-design

---


# api-and-interface-design

This registry entry references the upstream `api-and-interface-design` Agent Skill. Installers should use `agentpacks.source` and avoid copying upstream content into this registry.