Runs the recipe on first await/then. This is the single trigger point for the lazy work — catch and finally route through it too, since both call then per spec.

The signature mirrors Promise.prototype.then exactly (including reason: any, which the lib.d.ts declaration uses) so the subclass stays assignable everywhere a Promise is.

const task = Task(() => [{ name: 'ada' }]);

const names = task.then((users) => users.map((u) => u.name)); // plain Promise out
await names; // ['ada'] — to stay in Task-land (lazy, retryable, typed E), use .map instead