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union

Instance method on Set.prototype.

union(input: { set: <receiver>; other: ReadonlySetLike<U>; prompt?: string }): Promise<Set<T | U>>

The prompt field is optional. When omitted (or set to an empty string) the wrapper falls back to the native Set.prototype.union 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.

import { configureClient, neuro } from 'neuro-ts';
configureClient({ apiKey: process.env.OPENAI_API_KEY });
// Set union (a ∪ b). The [...a, ...b] idiom, retired.
await neuro.set.union({ set: a, other: b, prompt: 'return a new Set with elements from both set and other, deduped under SameValueZero - the spread-and-dedup dance, finally built-in' });

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

Generated promptSet.prototype.union
You are simulating the JavaScript built-in `Set.prototype.union`.
## Original signature(s)
  Overload 1: (other: ReadonlySetLike<U>) => Set<T | U>
## How to respond
- Behave EXACTLY as the original `union` 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.