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oscal-compass

Trestle MCP

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by oscal-compass
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Trestle MCP

MCP server to easily use compliance-trestle (OSCAL tool) from Claude, Roo, or any MCP-compliant client.

mcp-name: io.github.oscal-compass/compliance-trestle-mcp

Getting Started

This project can be used in the following two ways:

Choose the option that best fits your workflow.

Usage from RooCode

  1. Add the following JSON to .roo/mcp.json (Roo workspace):

    {
    "mcpServers": {
        "trestle": {
            "command": "uvx",
            "args": ["--from", "compliance-trestle-mcp", "trestle-mcp"]
        }
    }
}

  2. Open Roo, confirm trestle tools are listed in the MCP panel, and execute as needed.

    https://github.com/user-attachments/assets/59215549-cad9-4101-baa4-ecba77ac3904

Usage from CLI (MCP Client)

Step 1: Write your mcp.json config

{
    "mcpServers": {
        "trestle": {
            "command": "uvx",
            "args": ["--from", "./trestle-mcp-tmp", "trestle-mcp"]
        }
    }
}

Save this as mcp.json in your current directory.

Step 2: List Available Tools

uvx mcp-cli tools --config-file mcp.json

Sample output (tools available):

6 Available Tools
┌─────────┬─────────────────────────────────┬───────────────────────────────────────────────────────────────────┐
│ Server  │ Tool                            │ Description                                                       │
├─────────┼─────────────────────────────────┼───────────────────────────────────────────────────────────────────┤
│ trestle │ trestle_init                    │ Initialize a trestle working directory.                           │
│ trestle │ trestle_import                  │ Import an existing OSCAL model into the trestle workspace.        │
│ trestle │ trestle_author_catalog_generate │ Generate Catalog controls in markdown form from a catalog         │
│ trestle │ trestle_author_profile_generate │ Generate markdown documentation set for controls defined in profile│
│ trestle │ trestle_author_profile_resolve  │ Resolve an OSCAL profile to a resolved profile catalog.           │
│ trestle │ trestle_author_profile_assemble │ Assemble markdown controls into a Profile JSON file.              │
└─────────┴─────────────────────────────────┴───────────────────────────────────────────────────────────────────┘

Step 3: Execute a Tool (e.g., trestle_init)

Start MCP interactive shell:

uvx mcp-cli interactive --config-file mcp.json

Then run, for example:

> execute trestle_init '{"params": {}}'

Typical result:

✓ ✅ Tool executed successfully
{
  "result": {
    ...
    "content": [
      {
        "type": "text",
        "text": "✅ Trestle workspace initialized successfully"
      }
    ]
  }
}

You'll see folders as follows:

assessment-plans    catalogs               plan-of-action-and-milestones  system-security-plans
assessment-results  component-definitions  profiles

Tool List & Quick Reference

  • trestle_init: Initialize a trestle workspace

  • trestle_import: Import OSCAL models (Catalog/Profile/etc.) from a file or URL

  • trestle_author_catalog_generate: Generate markdown controls from a catalog

  • trestle_author_profile_generate: Generate markdown for profiles

  • trestle_author_profile_resolve: Resolve profile to catalog

  • trestle_author_profile_assemble: Assemble markdown controls into profile JSON

For advanced use, refer to official compliance-trestle docs or developer documents in this repo.

Troubleshooting & Help

  • Make sure uvx is installed and on your PATH.

  • If you see command/module errors, check the MCP server path in mcp.json is correct.

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