Cursor

Persistent context and inter-agent messaging for Cursor AI. Activate when the user asks about resuming previous work, continuing where they left off, sharing context between agents or tools, multi-agent coordination, remembering across Composer sessions, cross-platform context sync, or agent communication. Also activate at session start to check for context.From its SKILL.md

Install

npx -y skills add RagavRida/agentsmcp --skill cursor

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

2 things to look at

1 stars1 stars. Stars are a popularity signal and not a quality one, but at this level it is likely that nobody has read this closely except its author, and you would be relying on your own review.
runs commandsInstructs the agent to run 3 commands, including `mkdir -p .cursor/rules` and 2 more.

SKILL.md

3.6 KB, 856 tokens by cl100k_base, as published. Nobody here has run it

AgentMailbox — Context Sync for Cursor

Your context follows you. Not the tool.

AgentMailbox gives Cursor persistent memory across Composer sessions, tools, and restarts. When a session starts, check your mailbox and pick up exactly where the last session left off — including context from Claude Desktop, Antigravity, Continue, or any other MCP-aware tool.

Setup in Cursor

1. Add MCP Server

Go to Cursor Settings → MCP and add:

{
  "mcpServers": {
    "agentsmcp": {
      "command": "npx",
      "args": ["-y", "agentsmcp-adapter"],
      "env": {
        "AGENTSMCP_AGENT_ID": "cursor@local",
        "AGENTSMCP_SERVER": "http://localhost:3000"
      }
    }
  }
}

For the public demo server (no self-hosting required):

{
  "env": {
    "AGENTSMCP_SERVER": "https://hdnxa5c8yr.us-east-1.awsapprunner.com"
  }
}

2. Install Rules (Optional)

Copy the rules file to your project for always-on context sync:

mkdir -p .cursor/rules
cp skills/cursor/rules/agentmailbox.mdc .cursor/rules/

3. Start the Server (Self-Hosted)

npx agentsmcp-server

Workflows for Cursor

Session Start — Restore Context

When opening a project or starting a new Composer session:

Tool: agentsmcp_receive

This returns the full context frame:

snapshot — Last sender's state
threadSummaryStructured — Decisions, open questions, artifacts from the thread
recentMessages — Last 10 messages verbatim

Summarize for the user: "You were working on [X]. Open questions: [Y]."

Composer Multi-File Edits

Before starting a multi-file edit in Composer, sync the relevant thread:

Tool: agentsmcp_sync
Arguments: { "threadId": "<thread-id>" }

After completing the edit, record what changed:

Tool: agentsmcp_send
Arguments:
  to: "cursor@local"
  body: {
    "composerEdit": "Refactored auth module",
    "filesChanged": ["src/auth.ts", "src/middleware.ts", "tests/auth.test.ts"],
    "decisions": ["Using JWT with 24h expiry", "Middleware validates on every route"],
    "status": "complete"
  }

Cross-Platform Handoff

When the user mentions switching to another tool:

Tool: agentsmcp_send
Arguments:
  to: "claude@local"
  body: {
    "handoff": "Continuing auth work",
    "currentState": "JWT middleware implemented, tests passing",
    "remainingTasks": ["Token refresh endpoint", "Rate limiting"],
    "context": "See thread for full history"
  }

MCP Tool Reference

Tool	Purpose
`agentsmcp_receive`	Get unread messages with full context
`agentsmcp_send`	Send a message, create or continue a thread
`agentsmcp_sync`	Rejoin a thread with assembled context
`agentsmcp_threads`	List all threads for this agent
`agentsmcp_mark_read`	Mark a thread as read
`agentsmcp_reply_all`	Reply to all visible participants
`agentsmcp_unread`	List unread context frames
`agentsmcp_participants`	List participants with roles (to/cc/bcc)

What ships with it: 2 files

3.9 KB alongside SKILL.md

resources/

cursor-mcp-config.json239 B

rules/

agentmailbox.mdc3.7 KB