Designs stable API, interface, schema, event, CLI, module, and service contracts before implementation so callers, consumers, and future agents can depend on them safely. Use when creating or changing public/internal APIs, SDK surfaces, webhooks, GraphQL/REST/RPC routes, database or message contracts, module boundaries, config formats, CLI commands, or any interface where compatibility, versioning, errors, auth, observability, or Hyrum's Law matters.
How to install api-and-interface-design?
pimenov/codex-first-skills-pack/api-and-interface-design
$npx -y skills add pimenov/codex-first-skills-pack --skill api-and-interface-designInstalls into the current project.
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Run `npx skills use "https://github.com/pimenov/codex-first-skills-pack" --skill "pimenov/codex-first-skills-pack/api-and-interface-design"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/pimenov/codex-first-skills-pack" that are relevant to the current task. Run `npx skills add "https://github.com/pimenov/codex-first-skills-pack"` and select the relevant skills, then follow their instructions.
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