By name: raycast description: Raycast extension development. Use when working with @raycast/api imports, Raycast commands/tools, or building extensions. user-invocable: true disable-model-invocation: true
Raycast
Project Structure
Commands map by name to src/<name>.tsx. Tools live in src/tools/<name>.ts. Use .tsx for UI commands, .ts for no-view commands and tools. Icons go in assets/. The package.json serves as both the npm manifest and the Raycast extension manifest.
Manifest
The package.json is a superset of npm's format with Raycast-specific fields: commands, tools, preferences, platforms, categories, icon, and author. Command modes are view (renders UI), no-view (runs silently), and menu-bar (menu bar extra).
Components
React-based UI with @raycast/api. Top-level views: List, Grid, Detail, Form. Wrap actions in ActionPanel with Action items. Always pass isLoading to top-level components. Use List.EmptyView for empty states.
Hooks
@raycast/utils provides data-fetching and state hooks: useFetch for URL fetching, usePromise and useCachedPromise for async functions with stale-while-revalidate caching, useForm for form validation, useLocalStorage for persistent state, and useExec for shell commands. Use keepPreviousData to prevent flickering during search.
AI Tools
Tools export a default async function with a typed Input parameter. JSDoc comments on the Input type teach the AI to use the tool. Export a confirmation function for destructive operations. Configure ai.instructions in package.json for extension-level guidance.
Development
Bootstrap with npx create-raycast-extension. Install dependencies with npm install. Run npm run dev for development with hot reloading. Run npm run build to type-check and bundle. Run npm run lint for code style. Use npm (not yarn or pnpm) and commit package-lock.json.
Store
Extensions require Apple Style Title Case for names. Icons must be 512x512 PNG. Screenshots should be 2000x1250 PNG. Include a CHANGELOG.md. Add a README.md if setup is required. Run npm run publish to submit.