PromptForge

What it does

PromptForge is an open-source TypeScript toolkit for building production-ready AI prompts. Define prompts with type-safe schemas, validate inputs before expensive LLM calls, compose reusable prompt blocks, and compile prompts for multiple AI providers. Built for developers who want maintainable, scalable, and reliable prompt engineering workflows. MIT licensed and developer-first.

The TypeScript Toolkit for Prompt Engineering. Replace fragile string templates with a modern developer workflow.

Build type-safe, composable, production-ready prompts with TypeScript. Replace fragile string templates with a modern developer workflow. const prompt = "You are a helpful assistant\n" + "Context: " + data.context + "\n" + "User: " + req.query; // Breaks easily 2. Type-Safe API const prompt = pf.define({ role: 'helpful assistant', context: data.context, task: req.query }); // Compiled & Validated String concatenation does not scale. As your AI features grow, managing large prompt templates with string interpolation becomes a maintenance nightmare. Unescaped characters break JSON outputs, context gets duplicated, and refactoring is impossible. PromptForge replaces template literals with a…from prompt-forge-docs.vercel.app

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  PromptForge2025 · github.com · ▲474

  PromptForge: Open-source AI prompt engineering workbench with systematic evaluation I built PromptForge after getting frustrated with the manual trial-and-error approach to prompt engineering. Most tools are just text editors, but I wanted something that brings software engineering discipline to prompt development. Key technical features: - AI-assisted prompt generation (stop starting from scratch) - Systematic evaluation engine that auto-generates test suites - Multi-model support (Claude, GPT-4, Azure OpenAI) - Go backend with SQLite for performance and simplicity - One-line Docker…

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  ChainForge, a visual tool for prompt engineering and LLM evaluation2023 · chainforge.ai · ▲177

  Hi HN! We’re been working hard on this low-code tool for rapid prompt discovery, robustness testing and LLM evaluation. We’ve just released documentation to help new users learn how to use it and what it can already do. Let us know what you think! :)

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  PromptForgeJun 2026 · promptforge-navy-psi.vercel.app · ▲4

  14 AI tools, your own API key, zero subscription

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  PROMPTMETHEUS2023 · promptmetheus.com · ▲87

  One-shot Prompt Engineering Toolkit

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  PromptForgeFeb 2026 · promptforge-app.com · ▲7

  Update AI prompts without redeploying your app

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  PromptForge2025 · forge-ai-interface.lovable.app · ▲10

  Hi HN, I recently built PromptForge — a minimal, developer-first web app that helps you generate high-quality GPT prompts from just a few structured fields. Why? As a developer, I often found myself rewriting similar prompts manually. I wanted a faster and more reliable way to generate optimized prompts for various tasks — coding, debugging, idea generation, etc. So I built a tool that combines structure, speed, and simplicity. What it does: Select a use case (e.g. summarization, code explanation) Fill out a few fields (context, tone, output format) Get a clean, optimized prompt Save, reuse,…

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