Open-source prompt-engineering software

631 open-source libraries, tools and applications tagged prompt-engineering, ranked by how closely prompt-engineering is their primary purpose, then by adoption and maintenance health. Each entry links to a page with sources, use cases and when to choose or avoid it.

631 products, primary matches first, then adoption-weighted; health v2 shown.

Product	Health v2	Stars	Maturity
shyamsaktawat/OpenAlpha_Evolve OpenAlpha_Evolve is an open-source Python framework inspired by DeepMind's AlphaEvolve that uses LLMs to iteratively generate, test, and ev…	27	1053	active
metauto-ai/GPTSwarm GPTSwarm is a Python library for building LLM-based agents as computational graphs, with modules for agent graphs, memory, LLM backends, an…	52	1045	active
agiwhitelist/auteur auteur is an Agent Skill (SKILL.md plus recipes and scripts) for Claude Code and other AI coding agents that directs cinematic website buil…	72	1035	active
agents-flex/agents-flex Agents-Flex is a lightweight, modular Java framework for building AI applications and agents, positioned as a Java counterpart to Spring AI…	91	1032	active
google/prompt-to-prompt Google's official implementation of the Prompt-to-Prompt paper, which enables text-driven image editing in Latent Diffusion and Stable Diff…	10	3456	maintenance
ourongxing/chatgpt-vercel A self-hostable ChatGPT web client built with SolidStart and deployed on Vercel edge functions, powered by the OpenAI API. It offers an ele…	10	3206	maintenance
OFA-Sys/OFA OFA is a unified sequence-to-sequence pretrained model supporting English and Chinese that unifies cross-modality, vision, and language tas…	32	2555	maintenance
glowingjade/obsidian-smart-composer Smart Composer is an Obsidian plugin that adds an AI chat assistant with contextual awareness of your vault, smart writing assistance, and …	58	2331	maintenance
approximatelabs/sketch Sketch is an AI code-writing assistant for pandas users that understands the context of your dataframe content to generate relevant suggest…	32	2281	maintenance
MetaGLM/FinGLM FinGLM is an open, community-driven financial LLM project centered on a dialog-based question-answering system that analyzes Chinese listed…	28	2270	maintenance
Turing-Project/AntiFraudChatBot A prompt-based Chinese conversational AI framework that connects a fine-tuned large language model (YUAN-1.0) to WeChat via the wechaty fra…	23	2220	maintenance
Forethought-Technologies/AutoChain AutoChain is a lightweight, extensible Python framework for building custom LLM-powered generative agents with custom tools, inspired by La…	52	1882	maintenance
Synaptrix/ChatGPT-Desktop A cross-platform desktop ChatGPT client built with Tauri, Vue 3, and Arco Design that wraps the OpenAI GPT-3.5-turbo API. It offers a fast …	10	1767	maintenance
cvlab-columbia/viper ViperGPT is a research codebase that composes vision-and-language models with code generated by large language models (GPT-3.5/GPT-4) to pe…	31	1720	maintenance
eyurtsev/kor Kor is a Python library for extracting structured data from text using large language models. Users define a schema (Kor-style or Pydantic)…	22	1684	maintenance
hamelsmu/evals-skills A collection of skills (prompts/instructions) that guide AI coding agents like Claude Code through building and auditing LLM evaluation pip…	10	1677	maintenance
vercel/modelfusion ModelFusion is a TypeScript library that provides a unified, vendor-neutral abstraction layer for integrating AI models into JavaScript and…	10	1319	maintenance
andrewyng/translation-agent A Python demonstration library by Andrew Ng implementing an agentic machine translation workflow: an LLM translates text, reflects on its o…	25	5816	experimental
OpenNSWM-Lab/FAROS FAROS is a blueprint-driven AutoResearch runtime that orchestrates end-to-end AI research workflows, from idea generation through experimen…	56	3037	experimental
Yeachan-Heo/gajae-code Gajae-Code (gjc) is an external coding-agent harness that runs AI coding agents in any repository using the coding subscription plans you a…	77	3016	experimental
IlyaRice/RAG-Challenge-2 A Python implementation of the winning RAG system from the Enterprise RAG Challenge 2 competition, answering questions about company annual…	26	2458	experimental
renatoasse/opensquad opensquad is a multi-agent orchestration framework that lets users describe tasks in natural language and automatically assembles teams of …	46	2120	experimental
cfortuner/promptable Promptable is a TypeScript/JavaScript library for building LLM-powered applications, providing prompt templating, model providers (OpenAI, …	10	1744	experimental
protectai/llm-guard LLM Guard is a Python library providing input and output scanners to secure LLM interactions, including sanitization, harmful language dete…	10	3208	abandoned
npiv/chatblade Chatblade is a Python CLI tool for querying OpenAI's ChatGPT from the terminal, supporting piped input, saved prompt preambles, session rec…	47	2590	abandoned
Maestro Flow A JSON-driven multi-agent development framework for Claude Code with intelligent CLI orchestration across Gemini, Qwen, Codex, and Claude, …	10	2130	abandoned
MeetKai/functionary Functionary is a chat language model and serving code that interprets and executes functions/plugins, deciding when to call tools in parall…	66	1596	abandoned
prefect-archive/ControlFlow ControlFlow is a Python framework for building agentic AI workflows, letting developers define discrete observable tasks, assign specialize…	10	1387	abandoned
CommandCodeAI/BaseAI BaseAI is a TypeScript-first web AI framework for building serverless, composable AI agents with memory (RAG), tools, and pipes, developed …	56	1283	abandoned
pinecone-io/canopy Canopy is an open-source Retrieval Augmented Generation (RAG) framework and context engine built on top of the Pinecone vector database, pr…	10	1033	abandoned
dillionverma/llm.report llm.report is an open-source logging and analytics platform for the OpenAI API, letting users log ChatGPT API requests and responses, analy…	10	1019	abandoned