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ctxs context registry

2025

An open-source registry for LLM context windows, prompts, and other content. I built ctxs.ai to help developers share and discover effective contexts for enhancing AI assistant performance.

ctxs.ai is an open-source, community-curated registry for context windows, prompts, and other content used with Large Language Models (LLMs). It serves as a hub where developers can share and discover context files to enhance LLM performance.

  • A comprehensive library of reusable context files for common development scenarios
  • A unique permalinks system ensuring context files can be reliably accessed and shared
  • CLI integration that allows seamless workflow integration, especially with Cursor rules
  • Community voting system to surface the most valuable content each week
"Context is King when working with LLMs." — Simon Willison
Stack:Astro, Tailwind CSS, Neon (Postgres), Fly.io