prompt-merge

Zero-dependency library for conditionally merging LLM (system) prompts into a single string.

Installation

npm install prompt-merge

Usage

import pm from "prompt-merge";
import { generateText } from "ai";

const result = await generateText({
  model: openai("gpt-4o"),
  system: pm(
    "You are a helpful assistant.",
    canTranslate && "You can translate text.",
    {
      "You support translating Japanese to English": canTranslateJapanese,
      "You support translating German to English": canTranslateGerman,
    }
  ),
  messages,
});

Acknowledgements

This package was inspired by two packages I've used for managing classNames (which for all intents and purposes is what prompts are... just strings):

• classnames
• tailwind-merge

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Sponsorship

^{Special thanks to:}