arbitrium

PStryder/arbitrium

Persistent shell MCP server for Claude Code. Spawn headless shell sessions that retain full state (env vars, cwd, aliases) across tool calls. Sentinel-based output capture returns complete command output with exit codes. Auto-detects best available shell (Git Bash, pwsh, cmd). All sessions logged to ./logs/. The agency layer of the Velle triad.

Install

{
  "mcpServers": {
    "arbitrium": {
      "command": "npx",
      "args": [
        "-y",
        "arbitrium"
      ]
    }
  }
}

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