prompt-optimizer alternatives

linshenkx/prompt-optimizer (38k stars, +308 this week): An AI prompt optimizer for writing better prompts and getting better AI results. Why it matters: useful plumbing for shipping LLM-powered features.

Below are 12 other LLM tooling repos tracked by OSS Radar that share at least two GitHub topics with prompt-optimizer, ordered by how many topics overlap, then by stars gained in the last 7 days. Topic overlap means a similar problem space, not a drop-in replacement, so check each project's README.

1. 1. asgeirtj/system_prompts_leaks

   +91/wkest.

   Documented system prompts from Anthropic - Claude Fable 5.1, Opus 5.5, Claude Design, Claude Code. OpenAI - ChatGPT GPT-6-Astra, Codex. Why it matters: useful plumbing for shipping LLM-powered features.

   70k stars · Python · shared topics: ai-prompts, llm, prompt, prompt-engineering

2. 2. promptfoo/promptfoo

   +63/wkest.

   Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Why it matters: useful plumbing for shipping LLM-powered features.

   26k stars · TypeScript · shared topics: llm, prompt-engineering, prompt-testing

3. 3. DietrichGebert/ponytail

   +1.7k/wkest.

   Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote. Why it matters: useful plumbing for shipping LLM-powered features.

   163k stars · JavaScript · shared topics: llm, prompt-engineering

4. 4. JuliusBrussee/caveman

   +700/wkest.

   🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens by talking like a caveman. Why it matters: useful plumbing for shipping LLM-powered features.

   112k stars · Go · shared topics: llm, prompt-engineering

5. 5. headroomlabs-ai/headroom

   +315/wkest.

   Compress tool outputs, logs, files, and RAG chunks before they reach the LLM. Why it matters: useful plumbing for shipping LLM-powered features.

   75k stars · Python · shared topics: llm, prompt-engineering

6. 6. f/prompts.chat

   +203/wkest.

   f.k.a. Awesome ChatGPT Prompts. Share, discover, and collect prompts from the community. Why it matters: useful plumbing for shipping LLM-powered features.

   173k stars · HTML · shared topics: llm, prompt-engineering

7. 7. lidge-jun/opencodex

   +126/wkest.

   Universal provider proxy for OpenAI Codex & Claude Code — use any LLM (Claude, Gemini, Grok, DeepSeek, Ollama…) with Codex CLI, App, SDK… Why it matters: useful plumbing for shipping LLM-powered features.

   17k stars · TypeScript · shared topics: ai-tools, llm

8. 8. langfuse/langfuse

   +112/wkest.

   🪢 Open source agent evals & observability: Trace, evaluate, and improve LLM applications with one open platform. Why it matters: useful plumbing for shipping LLM-powered features.

   36k stars · TypeScript · shared topics: llm, prompt-engineering

9. 9. comet-ml/opik

   +56/wkest.

   Debug, evaluate, and monitor your LLM applications, RAG systems, and agentic workflows with comprehensive tracing, automated evaluations… Why it matters: useful plumbing for shipping LLM-powered features.

   23k stars · Python · shared topics: llm, prompt-engineering

10. 10. qunqin24/Pulse

    +56/wkest.

    Know how much Claude Code, Codex, Cursor, Copilot and 70+ other AI coding tools you have left — a free, open-source macOS monitor on the… Why it matters: useful plumbing for shipping LLM-powered features.

    546 stars · Swift · shared topics: ai-tools, llm

11. 11. Nanako0129/sepia

    +42/wkest.

    De-AI writing skill for any Agent Skills-compatible agent (77+ via the Skills CLI), with native plugins for Claude Code, Codex, Grok Build… Why it matters: useful plumbing for shipping LLM-powered features.

    3.2k stars · Python · shared topics: llm, prompt-engineering

12. 12. jnMetaCode/agency-agents-zh

    +35/wkest.

    🎭 277 个即插即用的 AI 专家角色 — 支持 Claude Code/Cursor/Copilot 等 20 种工具，覆盖工程/设计/营销/金融等 20 个部门。含 64 个中国市场原创智能体（小红书/抖音/微信/飞书/钉钉/Qt 上位机/机械设计）。 Why it matters: useful plumbing for shipping LLM-powered features.

    21k stars · Shell · shared topics: llm, prompt-engineering

More: all trending LLM tooling repos · compare prompt-optimizer with the top 2