Uno.DevServer 6.6.0-dev.930

Prefix Reserved
.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher.
This is a prerelease version of Uno.DevServer.
There is a newer prerelease version of this package available.
See the version list below for details. 
{
  "servers": {
    "Uno.DevServer": {
      "type": "stdio",
      "command": "dnx",
      "args": ["Uno.DevServer@6.6.0-dev.930", "--yes", "--", "mcp", "serve"]
    }
  }
}
This package contains an MCP Server. The server can be used in VS Code by copying the generated JSON to your VS Code workspace's .vscode/mcp.json settings file. 
dotnet tool install --global Uno.DevServer --version 6.6.0-dev.930
This package contains a .NET tool you can call from the shell/command line. 
dotnet new tool-manifest
                    


                            if you are setting up this repo
                        

                    

                
dotnet tool install --local Uno.DevServer --version 6.6.0-dev.930
This package contains a .NET tool you can call from the shell/command line. 
#tool dotnet:?package=Uno.DevServer&version=6.6.0-dev.930&prerelease
                    


                    

                
nuke :add-package Uno.DevServer --version 6.6.0-dev.930

Uno Platform DevServer CLI

The Uno DevServer CLI (uno-devserver) manages the local development server for Uno Platform projects. It handles DevServer lifecycle, IDE channel communication, add-in discovery, and exposes an MCP (Model Context Protocol) interface for AI-powered development tools.

Installation

The CLI is distributed as a .NET tool and is typically invoked via dotnet dnx:

dotnet dnx -y uno.devserver <command>

Commands

Command Description
start Start or reuse a DevServer for the current solution
stop Stop all running DevServer instances
list Display running DevServer instances with process ancestry
cleanup Remove stale DevServer registrations
disco Discover environment details (SDK, packages, active servers)
health Report DevServer health for the current workspace
login Open Uno Platform settings
mcp serve Start the MCP STDIO proxy for AI tool integration
mcp status Report MCP server registration state across IDE clients
mcp install Register MCP servers in IDE client config files
mcp uninstall Remove MCP server registrations

How it works

The DevServer is a lightweight local HTTP server that provides bidirectional communication between the IDE and your running Uno Platform application:

  1. IDE opens a solution — the DevServer reserves a TCP port and writes it to .csproj.user
  2. App is built in Debug — connection details are embedded in the build output
  3. App launches — it connects back to the DevServer via WebSocket
  4. Development features activate — Hot Reload, XAML updates, and design-time tools start working

IDE channel

The IDE channel is a named pipe (\\.\pipe\{guid}) providing a direct JSON-RPC link between the IDE extension and the DevServer Host. It carries:

  • Development environment status notifications
  • Hot Reload coordination messages
  • Application launch tracking

When a DevServer is already running (e.g. started by MCP), the CLI reuses it and rebinds the IDE channel without restarting the Host process.

MCP integration

The CLI exposes an MCP server (mcp serve) that AI coding assistants (Claude, Codex, Copilot, Cursor, etc.) can connect to. This enables AI tools to inspect your app, query diagnostics, and interact with the DevServer programmatically.

Diagnostics

Use disco for a full environment diagnostic:

dotnet dnx -y uno.devserver disco

This shows: SDK version, DevServer package version, Host path, .NET version, resolved add-ins, and active server instances with their process ancestry chain.

Use health for a quick status check:

dotnet dnx -y uno.devserver health

Security

The DevServer binds to local ports only and is intended for local development. Do not expose it to untrusted networks.

Documentation

Product Compatible and additional computed target framework versions.
.NET net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

This package has no dependencies.

Version Downloads Last Updated
6.6.0-dev.943 0 4/4/2026
6.6.0-dev.942 31 4/3/2026
6.6.0-dev.939 46 4/3/2026
6.6.0-dev.938 35 4/3/2026
6.6.0-dev.935 45 4/3/2026
6.6.0-dev.934 53 4/2/2026
6.6.0-dev.931 52 4/1/2026
6.6.0-dev.930 35 4/1/2026
6.6.0-dev.929 36 4/1/2026
6.6.0-dev.928 37 4/1/2026
6.6.0-dev.927 31 4/1/2026
6.6.0-dev.926 26 4/1/2026
6.6.0-dev.925 42 3/31/2026
6.6.0-dev.922 64 3/30/2026
6.6.0-dev.921 49 3/30/2026
6.6.0-dev.920 48 3/30/2026
6.6.0-dev.912 56 3/30/2026
6.6.0-dev.910 154 3/28/2026
6.6.0-dev.908 62 3/26/2026
6.5.153 4,729 2/10/2026
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