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api-design

Use when designing or reviewing API contracts, versioning decisions, and governance standards.

Skill by ivegamsft

IndexedMIT★ 4
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Works with Claude Code, Claude apps, Codex, Cursor, Gemini CLI, GitHub Copilot, VS Code, OpenCode, Goose, Windsurf. Read the repository before you give any tool access to your data.

npx agentmarket install skill/ivegamsft-api-design

Asks which of your tools to add it to (Claude Code, Codex, Cursor, VS Code, Windsurf, Gemini CLI, Claude Desktop) and shows the change first. See https://agentmart.dev/cli.

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About

Use when designing or reviewing API contracts, versioning decisions, and governance standards. USE FOR: design a REST API contract, review an OpenAPI diff for breaking changes, choose an API versioning strategy, draft GraphQL schema changes, create a deprecation or sunset plan. DO NOT USE FOR: implementing request handlers, tuning database indexes, penetration testing an API.

Use cases: documents, design, backend, testing

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Permissions

What this skill can do and what it asks for, from its SKILL.md. Checked Oct 25, 2026.

Tools
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Secrets
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Install scripts
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Network hosts it talks to 1

  • codeload.github.com · found in install command

Files it touches

  • ~/.claude/skills/api-design

What's inside

Skill name
api-design
Description
Use when designing or reviewing API contracts, versioning decisions, and governance standards. USE FOR: design a REST API contract, review an OpenAPI diff for breaking changes, choose an API versioning strategy, draft GraphQL schema changes, create a deprecation or sunset plan. DO NOT USE FOR: implementing request handlers, tuning database indexes, penetration testing an API.
License
MIT
Metadata
category: architecture · maturity: stable
Instructions
17 lines in SKILL.md · view on GitHub

Agent Skills spec issues

  • compatibility: must be text of at most 500 characters
  • allowed-tools: must be a space-separated string

Files (6)

  • SKILL.md
  • api-governance-checklist.md
  • breaking-change-checklist.md
  • eval.yaml
  • openapi-template.md
  • versioning-decision-tree.md

SKILL.md (first lines)

# API Design Skill

Design new API contracts, review spec changes for breaking changes, choose versioning strategies, and enforce API governance standards.

## Templates in This Skill

| Template | Purpose |
|---|---|
| `openapi-template.md` | OpenAPI 3.x skeleton for a new REST API resource with CRUD, pagination, and error envelopes |
| `breaking-change-checklist.md` | Checklist for evaluating whether a spec change is breaking, with mitigation guidance |
| `versioning-decision-tree.md` | Decision tree for choosing the right versioning action for a given change |
| `api-governance-checklist.md` | Governance checklist every API spec must pass before approval |

## Agent Pairing

Use with `api-designer` agent. For implementation hand off to `backend-dev`; for data models coordinate with `data-tier`; share the spec with `frontend-dev` for consumer integration.

From ivegamsft/basecoat, MIT.

More from ivegamsft/basecoat

Signals

Stars
4
Forks
1
Open issues
10
Last commit (this folder)
Sep 19, 2026 (1 month ago)
Last release
Oct 11, 2026 (18 days ago)

From GitHub (fetched Oct 24, 2026).

Details

License
MIT
Repository
github.com/ivegamsft/basecoat
Website
ivegamsft.github.io/basecoat/
First seen
Oct 24, 2026
Last checked
Oct 24, 2026
Source
GitHubgithub-graphql

More from ivegamsft

Cite this page

api-design skill. Agent Mart. https://agentmart.dev/skills/ivegamsft-api-design (last updated 2026-10-24)