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DiagBridge MCP

by putaojuju
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TypeScript
Hybrid

DiagBridge MCP

DiagBridge MCP is a general Windows MCP bridge for trusted local and remote AI agents.

It exposes one shared tool registry through:

  • stdio for local MCP clients (Codex, Claude Code, Cursor, etc.)

  • Streamable HTTP for remote MCP clients (ChatGPT, Codex Plugin, remote agents, etc.)

Runtime Requirements: Requires Node.js 22.6 or newer. Tested on Node.js 24.

中文：

DiagBridge MCP 是面向可信本地和远程 AI Agent 的通用 Windows MCP 桥。 它通过 stdio 和 Streamable HTTP 暴露同一套工具。

Transports

Entry point

Command / Script

Purpose

Stdio MCP server (MCP Host)

node --experimental-strip-types <path>/src/mcp/transports/stdio.ts

Production integration for MCP hosts over stdio.

Stdio MCP server (Manual Dev)

npm run dev:mcp

Manual process launch for development.

| Streamable HTTP MCP transport | npm run dev:remote-mcp | Remote MCP client integration over Streamable HTTP (src/mcp/transports/streamable-http.ts). | | Local Control Panel (Web UI) | npm run dev:friend-ui | Local Web UI (http://127.0.0.1:8790) and Remote Streamable HTTP server for friend diagnostic session management. |

Related MCP server: MCP Server for WinDbg Crash Analysis

Tools Overview

All tools are defined in a single, shared tool registry (src/mcp/tool-registry.ts).

Local Stdio Defaults (6 read-only tools)

  • system_info

  • list_dir

  • read_file

  • drive_inventory

  • junk_candidates

  • windows_event_summary

write_file and run_command are destructive and disabled by default. They can be enabled for stdio using DIAGBRIDGE_MCP_TOOLS.

Remote Streamable HTTP Defaults (4 read-only tools)

  • system_info

  • drive_inventory

  • junk_candidates

  • windows_event_summary

read_file, write_file, and run_command are never registered on the remote transport for security and privacy protection.

For full tool details, see docs/TOOLS.md.

Configuration

Environment variables:

Variable

Default

Meaning

DIAGBRIDGE_HOST

127.0.0.1

Default host address.

DIAGBRIDGE_REMOTE_HOST

127.0.0.1

Bind address for Streamable HTTP server (DIAGBRIDGE_HTTP_HOST supported for 1-version deprecated compatibility).

DIAGBRIDGE_PORT

8787

Default port number.

DIAGBRIDGE_REMOTE_PORT

8787

Streamable HTTP server port (DIAGBRIDGE_HTTP_PORT supported for 1-version deprecated compatibility).

DIAGBRIDGE_SESSION_TOKEN

generated at startup

Session token for authenticating HTTP requests.

DIAGBRIDGE_MCP_TOOLS

read-only local tools

Comma-separated enabled tools for local stdio transport (DIAGBRIDGE_TOOLS supported for 1-version deprecated compatibility).

DIAGBRIDGE_REMOTE_DEV_NO_AUTH

0

Enable 1 for temporary localhost Inspector testing without token authentication (DIAGBRIDGE_HTTP_DEV_NO_AUTH supported for 1-version deprecated compatibility).

DIAGBRIDGE_CWD

current directory

Base working directory.

DIAGBRIDGE_AUDIT_LOG

.diagbridge-audit.jsonl

JSONL audit log file path.

Quick Start

npm install
npm run check
npm test

# Launch remote Streamable HTTP server
npm run dev:remote-mcp

Documentation

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