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Write tests before implementation code. Use when starting new features or fixing bugs. Covers Red-Green-Refactor cycle and TDD best practices.
Based on SOC occupation classification
| name | test-driven-development |
| description | Write tests before implementation code. Use when starting new features or fixing bugs. Covers Red-Green-Refactor cycle and TDD best practices. |
describe("Calculator", () => {
test("adds two numbers", () => {
const calc = new Calculator();
expect(calc.add(2, 3)).toBe(5);
});
});
// Run: FAIL - Calculator is not defined
class Calculator {
add(a: number, b: number): number {
return a + b;
}
}
// Run: PASS
Code is already clean, move to next test.
test("subtracts two numbers", () => {
const calc = new Calculator();
expect(calc.subtract(5, 3)).toBe(2);
});
// Run: FAIL - subtract is not defined
Biome 2.x linting and formatting patterns. Use when configuring code quality tools, setting up linting rules, formatting code, or integrating with CI/CD. Covers migration from ESLint/Prettier.
Hono 4.x web framework patterns. Use when building APIs, middleware, routing, or server-side applications. Covers multi-runtime support (Node, Bun, Cloudflare Workers), validation, CORS, and error handling.
Radix UI primitive patterns. Use when building accessible, unstyled UI components like dialogs, dropdowns, tooltips, tabs, and selects. Covers Tailwind styling, keyboard navigation, animations, and portal management.
React development patterns. Use when building React components, managing state, creating custom hooks, or optimizing React applications. Covers React 19 features, TypeScript integration, and composition patterns.
Tailwind CSS 4.x utility-first styling patterns. Use when building UI components, creating responsive layouts, implementing design systems, or customizing themes. Covers CSS-first configuration, @theme directive, and component patterns.
Vite 7.x build tool patterns. Use when configuring build setup, development server, environment variables, asset handling, or optimizing production builds for React applications.