Generate a complete OpenAPI 3.0 (OAS) specification from an API codebase, a Postman or Insomnia collection, or both together. Use this skill whenever the user wants to generate, create, or derive an OpenAPI spec, reverse-engineer an API definition, document an existing API, or convert a Postman/Insomnia collection to OpenAPI — when there is no existing OAS file yet.
Install
npx skills add 42Crunch-AI/claude-plugins --skill generate-oasnpx skills add 42Crunch-AI/claude-plugins --skill generate-oas -a claude-code -gnpx skills add 42Crunch-AI/claude-plugins --skill generate-oas -a codex -ggemini skills install https://github.com/42Crunch-AI/claude-plugins.git --path plugins/api-security-testing/skills/generate-oasgh skill install 42Crunch-AI/claude-plugins generate-oasgit clone --depth 1 https://github.com/42Crunch-AI/claude-plugins /tmp/42Crunch-AI__claude-plugins
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/42Crunch-AI__claude-plugins/plugins/api-security-testing/skills/generate-oas ~/.claude/skills/generate-oas # Claude Code
cp -R /tmp/42Crunch-AI__claude-plugins/plugins/api-security-testing/skills/generate-oas ~/.agents/skills/generate-oas # Codex, Cursor, Gemini CLI, Copilot, OpenCode