then

neuro.promise.then

Instance method on Promise.prototype.

Attaches callbacks for the resolution and/or rejection of the Promise.

Signatures

then(input: { promise: <receiver>; onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>; onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>; prompt?: string }): Promise<Promise<TResult1 | TResult2>>

The prompt field is optional. When omitted (or set to an empty string) the wrapper falls back to the native Promise.prototype.then and returns a resolved Promise without contacting the LLM. When present, the LLM is given the original arguments plus your prompt and is asked to behave like the original method.

Example

import { configureClient, neuro } from 'neuro-ts';

configureClient({ apiKey: process.env.OPENAI_API_KEY });

// Dual-handler attach. Implicit thenable unwrap is catastrophically forgettable.
await neuro.promise.then({ promise: target, onfulfilled: (v) => v.id, onrejected: (e) => null, prompt: 'attach fulfillment and rejection handlers, returning a new promise with implicit thenable unwrap - the step every refactor forgets before the incident' });

System prompt

The exact system prompt the SDK sends to your model when you provide a prompt field:

Generated promptPromise.prototype.then

You are simulating the JavaScript built-in `Promise.prototype.then`.
## Original signature(s)
  Overload 1: (onfulfilled?: (value: T) => TResult1 | PromiseLike<TResult1>, onrejected?: (reason: any) => TResult2 | PromiseLike<TResult2>) => Promise<TResult1 | TResult2>
## JSDoc
Attaches callbacks for the resolution and/or rejection of the Promise.

## How to respond
- Behave EXACTLY as the original `then` would, but use the user's intent to choose any callback / comparator / transform logic that the original would normally accept as an argument.
- Strictly preserve the original return type and shape.
- Output ONLY the JSON-encoded return value of the function call.
- Do NOT include explanations, prose, comments, or markdown fences.
- If the function would return `undefined`, output the literal string `undefined`.
- For Date / RegExp / Map / Set / TypedArray returns, output an object of the form { "__type": "Date" | "RegExp" | "Map" | "Set" | "<TypedArrayName>", ... } so the SDK can rehydrate it.