Getting Started

ctx4.ai gives your AI assistants persistent context via MCP. Your preferences, knowledge, and skills live in a GitHub repo and follow you across conversations in Claude, ChatGPT, Cursor, and any MCP client.

Create your context repo

Click the button below to create a private repo from our template. This is where your AI context will live — instructions, knowledge, and skills.

Use template repo

The template ( dubzdubz/ctx4-data-template ) creates this structure:

resources/
  instructions.md    # Your preferences & instructions
  context.md         # Who you are, what you do
skills/
  skill-creator/     # A built-in skill for creating new skills
knowledge/           # General knowledge & memories

Sign up

Create a free ctx4.ai account to link your context repo and authenticate with AI clients.

Connect GitHub

Install the ctx4.ai GitHub App and select the repo you created in Step 1. The app gets read/write access to that single repo so your AI can save context there.

Go to Settings

Connect your AI client

Add the ctx4.ai MCP server to any MCP-compatible client. The MCP URL is:

https://ctx4-ai.vercel.app/mcp

Open Claude Desktop and navigate to Settings → Connectors → Add Custom Connector.

Enter the name as ctx4 and the remote MCP server URL as:

https://ctx4-ai.vercel.app/mcp

Click Connect to authenticate.

Start using it

Run onboarding (optional but recommended)

The onboarding prompt will set up your context repo and ask a few questions about your preferences:

/ctx4:onboarding

Add system prompt (optional but recommended)

For best results, add this to your client's custom instructions or system prompt:

Use the ctx4 MCP to manage my long-term context and memory. Always call ctx_instructions first before using ctx_bash to understand how to interact with my context. Use it to store preferences, learnings, and anything that should persist across conversations.

Claude: Settings → General → Personal Preferences
ChatGPT: Settings → Personalization → Custom Instructions

Ready to get started?