It also covers the Bun-vs-Node tradeoff — Bun runs .ts/.tsx natively with no transpile step and does not down-convert modern syntax, but neither its runtime nor bundler perform type checking, so tsc --noEmit stays in CI regardless.

Out of scope: Node.js runtime setup (native type stripping, node:test) belongs to ts-runtime-node; tsconfig details belong to ts-config.

TypeScript on Bun

Agent Workflow (MANDATORY)

Before ANY implementation, spawn 3 agents in parallel, one Agent call each with a name: