Brain Execution Server

A queue-based execution server that monitors and processes jobs from the Brain MCP command queue.

Features

• Monitors /Users/bard/mcp/memory_files/command_queue/pending for jobs

• Executes shell commands and Python scripts

• Supports both JSON and text file job formats

• Moves completed jobs to completed/ or failed/ directories

• 5-minute timeout for safety

• Logs all operations to daemon.log

Related MCP server: mcp-cli-exec MCP Server

Job Formats

JSON Format

{
  "command": "which",
  "args": ["node"],
  "description": "Check if node is in PATH"
}

Or:

{
  "task_id": "unique_id",
  "command": "python3 /path/to/script.py",
  "purpose": "Description of the job",
  "result_file": "optional_output.txt"
}

Text Format

Plain text files (.txt or .sh) containing shell commands:

cd /path/to/dir && python script.py

Installation & Usage

1. Start the server:

   cd /Users/bard/Code/mcp-execution-server
   python3 server.py

2. Monitor the queue:

   python3 /Users/bard/mcp/memory_files/command_queue/queue_viewer.py

3. Add a job to the queue:

   # JSON job
   echo '{"command": "echo", "args": ["Hello from queue!"]}' > /Users/bard/mcp/memory_files/command_queue/pending/test_job.json
   
   # Text job
   echo 'ls -la /Users/bard/Code' > /Users/bard/mcp/memory_files/command_queue/pending/list_code.txt

Running in Background with LaunchControl

Create a launch agent to run the server automatically:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
    <key>Label</key>
    <string>com.brain.execution-server</string>
    <key>ProgramArguments</key>
    <array>
        <string>/usr/bin/python3</string>
        <string>/Users/bard/Code/mcp-execution-server/server.py</string>
    </array>
    <key>WorkingDirectory</key>
    <string>/Users/bard/Code/mcp-execution-server</string>
    <key>RunAtLoad</key>
    <true/>
    <key>KeepAlive</key>
    <true/>
    <key>StandardOutPath</key>
    <string>/Users/bard/mcp/memory_files/command_queue/server.log</string>
    <key>StandardErrorPath</key>
    <string>/Users/bard/mcp/memory_files/command_queue/server.error.log</string>
</dict>
</plist>

Queue Directories

• Pending: /Users/bard/mcp/memory_files/command_queue/pending/ - Jobs waiting to be processed

• Completed: /Users/bard/mcp/memory_files/command_queue/completed/ - Successfully executed jobs

• Failed: /Users/bard/mcp/memory_files/command_queue/failed/ - Jobs that failed or timed out

• Logs: /Users/bard/mcp/memory_files/command_queue/daemon.log - Server activity log

Security Note

This server executes arbitrary code from the queue. Ensure proper permissions on the queue directories.