TypeScript prompt-engineering

Open-source TypeScript projects categorized as prompt-engineering
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Top 23 TypeScript prompt-engineering Projects

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prompt-engineering

  1. prompt-optimizer

    An AI prompt optimizer for writing better prompts and getting better AI results.

    Project mention: Revolutionize Your AI Workflow with Prompt Optimizer! | dev.to | 2025-08-01

    View the Project on GitHub

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  3. langfuse

    🪢 Open source AI engineering platform: LLM evals, observability, metrics, prompt management, playground, datasets. Integrates with OpenTelemetry, LangChain, OpenAI SDK, LiteLLM, and more. 🍊YC W23

    Project mention: Best AI Monitoring Tools in 2026: LLM, Agent, and MCP Observability Compared | dev.to | 2026-06-13

    Langfuse is the open-source standard for LLM observability. It traces every LLM interaction — prompts, completions, latency, token usage, cost — and provides the tooling to debug, evaluate, and optimize LLM applications in production. Think of it as "Datadog for LLM calls" with a focus on prompt engineering workflows.

  4. 12-factor-agents

    What are the principles we can use to build LLM-powered software that is actually good enough to put in the hands of production customers?

    Project mention: Agents need control flow, not more prompts | news.ycombinator.com | 2026-05-07

    Own your control flow! A key point from 12 factor agents.

    "One thing that I have seen in the wild quite a bit is taking the agent pattern and sprinkling it into a broader more deterministic DAG." - https://github.com/humanlayer/12-factor-agents/blob/main/REA...

  5. promptfoo

    Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.

    Project mention: I tried to break my own MCP prompt-injection detector. One class of attack walks straight through - and it isn't a bug. | dev.to | 2026-06-14

    bulwark-mcp inspects every tool result bound for the agent in two passes: a set of ~24 regex signatures (drawn from garak, promptfoo, Trojan Source, and embracethered), and an optional local LLM classifier — Ollama running qwen2.5:3b by default. Nothing leaves the machine.

  6. Awesome-Prompt-Engineering

    This repository contains a hand-curated resources for Prompt Engineering with a focus on Generative Pre-trained Transformer (GPT), ChatGPT, PaLM etc

  7. helicone

    🧊 Open source LLM observability platform. One line of code to monitor, evaluate, and experiment. YC W23 🍓

    Project mention: How to track LLM costs per customer in production | dev.to | 2026-06-02

    Gateway or proxy attribution. A reverse proxy in front of the model-provider API records the request, computes the cost, and exposes per-customer breakdowns. Open-source options include Helicone, LiteLLM, Langfuse, and OpenLLMetry. Hosted equivalents serve as the AI cost observability layer for teams that want centralized visibility: LangSmith, Datadog LLM Observability, Arize Phoenix. Adds a network hop. Centralizes instrumentation across a fleet of services.

  8. eko

    Eko (Eko Keeps Operating) - Build Production-ready Agentic Workflow with Natural Language - eko.fellou.ai

    Project mention: I built an open-source AI browser that automates web tasks with natural language | dev.to | 2025-11-03

    Special thanks to Eko for the powerful agent framework.

  9. agenta

    The open-source LLMOps platform: prompt playground, prompt management, LLM evaluation, and LLM observability all in one place.

    Project mention: How to Actually Start Contributing to Open Source AI Projects (A Step-by-Step Guide) | dev.to | 2025-12-17

    This guide will walk you through the exact process I've seen work for dozens of contributors to Agenta and other AI projects.

  10. langwatch

    The platform for LLM evaluations and AI agent testing

    Project mention: Launch HN: Lucidic (YC W25) – Debug, test, and evaluate AI agents in production | news.ycombinator.com | 2025-07-30

    Hey! I work for the LLM Ops platform LangWatch and I've been working on building out our Go support the past few months as a little hobby of mine (I hope more people adopt this, so I can spent more of my working hours on this ).

    If you're interested, we're an LLM Ops platform, and our Go SDK has full support for OpenAI, and any OpenAI compatible endpoints, as well as some nice OpenTelemetry tracing support too.

    https://github.com/langwatch/langwatch/tree/main/sdk-go

  11. pezzo

    🕹️ Open-source, developer-first LLMOps platform designed to streamline prompt design, version management, instant delivery, collaboration, troubleshooting, observability and more.

  12. ChainForge

    An open-source visual programming environment for battle-testing prompts to LLMs.

  13. OpenPipe

    Turn expensive prompts into cheap fine-tuned models

    Project mention: Building Your Own AI Proxy: Route, Cache, and Monitor LLM Requests in TypeScript | dev.to | 2026-04-06

    For many teams, especially those starting out or with simpler needs, commercial solutions like Portkey, Helicone, OpenPipe, or LiteLLM Proxy offer off-the-shelf capabilities that cover many common proxy use cases (caching, logging, cost tracking). NeuroLink itself can be seen as an SDK that complements these, allowing you to integrate with them or build similar features on top.

  14. aide

    Conquer Any Code in VSCode: One-Click Comments, Conversions, UI-to-Code, and AI Batch Processing of Files! 在 VSCode 中征服任何代码：一键注释、转换、UI 图生成代码、AI 批量处理文件！💪 (by nicepkg)

  15. ChatGPT-Free-Prompt-List

    A free guide for learning to create ChatGPT3 Prompts

  16. MeiGen-AI-Design-MCP

    Supports GPT Image 2, Nanobanana & ComfyUI, with a 1,400+ prompt library, carefully crafted hooks and a multi-task orchestration system

    Project mention: Turn Claude Code/OpenClaw into Your Local Lovart – AI Design MCP Server | news.ycombinator.com | 2026-02-07

  17. langtrace

    Langtrace 🔍 is an open-source, Open Telemetry based end-to-end observability tool for LLM applications, providing real-time tracing, evaluations and metrics for popular LLMs, LLM frameworks, vectorDBs and more.. Integrate using Typescript, Python. 🚀💻📊

  18. tutor-gpt

    AI tutor powered by Theory-of-Mind reasoning

  19. Magick

    Magick is a cutting-edge toolkit for a new kind of AI builder. Make Magick with us! (by Oneirocom)

  20. gateway

    The only fully local production-grade Super SDK that provides a simple, unified, and powerful interface for calling more than 200+ LLMs. (by adaline)

  21. prompt-tower

    Context management for long-context LLMs, agents, and vibe coding. Instantly build context for an entire repo, selected files, folders, and GitHub issues to generate structured AI-XML context with real-time token counting.

    Project mention: Show HN: Badge that shows how well your codebase fits in an LLM's context window | news.ycombinator.com | 2026-02-27

    I haven't cared too much about repo tokens in a good while.

    But my coolest app was a better context creator. But I found it hard to extend to actual agentic coding use.

    https://prompttower.com/

  22. agentmark

    Markdown for the AI era

    Project mention: Markdown for the AI Era | news.ycombinator.com | 2025-07-13

  23. vibe-log-cli

    A CLI tool for logging and analyzing Claude Code and Cursor ai-driven coding session.

    Project mention: Claude Code auto daily /weekly recap notes | news.ycombinator.com | 2026-05-10

  24. Raycast-PromptLab

    A Raycast extension for creating powerful, contextually-aware AI commands using placeholders, action scripts, selected files, and more.

NOTE: The open source projects on this list are ordered by number of github stars. The number of mentions indicates repo mentiontions in the last 12 Months or since we started tracking (Dec 2020).

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TypeScript prompt-engineering related posts

  • AI skill testing: yes, your prompts need regression tests

    1 project | dev.to | 26 May 2026

  • Show HN: Daemons – we pivoted from building agents to cleaning up after them

    3 projects | news.ycombinator.com | 21 Apr 2026

  • Building Your Own AI Proxy: Route, Cache, and Monitor LLM Requests in TypeScript

    1 project | dev.to | 6 Apr 2026

  • Cómo Probar Aplicaciones LLM: Guía Completa de Promptfoo (2026)

    1 project | dev.to | 19 Mar 2026

  • Como Testar Aplicações LLM: Guia Completo do Promptfoo (2026)

    1 project | dev.to | 19 Mar 2026

  • Cara Menguji Aplikasi LLM: Panduan Lengkap Promptfoo (2026)

    1 project | dev.to | 19 Mar 2026

  • كيفية اختبار تطبيقات نماذج اللغة الكبيرة: دليل Promptfoo الكامل (2026)

    1 project | dev.to | 19 Mar 2026
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    www.saashub.com | 16 Jun 2026
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Index

What are some of the best open-source prompt-engineering projects in TypeScript? This list will help you:

# Project Stars
1 prompt-optimizer 30,717
2 langfuse 28,956
3 12-factor-agents 23,203
4 promptfoo 22,155
5 Awesome-Prompt-Engineering 6,030
6 helicone 5,802
7 eko 4,929
8 agenta 4,198
9 langwatch 3,297
10 pezzo 3,240
11 ChainForge 2,996
12 OpenPipe 2,805
13 aide 2,692
14 ChatGPT-Free-Prompt-List 2,279
15 MeiGen-AI-Design-MCP 1,399
16 langtrace 1,205
17 tutor-gpt 905
18 Magick 839
19 gateway 593
20 prompt-tower 380
21 agentmark 352
22 vibe-log-cli 321
23 Raycast-PromptLab 311

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