TypeScript Programming Guide

Toolchain

• Use Bun as the only package manager and runtime.
• Use the following defaults when scripts are missing:
  • Install deps: bun install
  • Type check: bun run tsc --noEmit
  • Lint + fix: bunx biome check --write <FILE_PATH>
  • Format only: bunx biome format --write <FILE_PATH>
  • Tests: bun test
• Run both Biome and type checks before finishing.
• Avoid introducing ESLint + Prettier in repositories that already use Biome.
• NEVER use npm, pnpm, yarn, npx, or pnpx.

References

Read these files before deep modifications: