Type Safety

Queuert provides end-to-end type safety with full type inference. Define your job types once, and TypeScript ensures correctness throughout your entire codebase:

• Job inputs and outputs are inferred and validated at compile time
• Continuations are type-checked — continueWith only accepts valid target job types with matching inputs
• Blockers are fully typed — access job.blockers with correct output types for each blocker
• Internal job types without entry: true cannot be started directly via startJobChain

const jobTypes = defineJobTypes<{
  "fetch-data": {
    entry: true;
    input: { url: string };
    continueWith: { typeName: "process-data" };
  };
  "process-data": {
    input: { rawData: string };
    output: { result: number };
  };
}>();

// TypeScript enforces:
// - startJobChain only accepts "fetch-data" (has entry: true)
// - continueWith only accepts { typeName: "process-data", input: { rawData: string } }
// - job.input is typed per job type in processors
// - complete() return type must match the output type

For runtime validation with libraries like Zod, Valibot, or ArkType, see Runtime Validation.

No runtime type errors. No mismatched job names. Your workflow logic is verified before your code ever runs.