Chris Hendrickson 260d291b0f Compile CLI to .project/toolchain/bin/dew for MCP stdio use

melos run pollutes stdout, breaking the MCP JSON-RPC channel.
The compiled binary has clean stdio and can be pointed at directly
by MCP clients.

- Add melos run compile script (output to .project/toolchain/bin/dew)
- Ignore .project/toolchain/ in .gitignore
- Update mcp.md with compile + client config instructions
- Remove workspace-root bin/ directory

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

2026-04-23 15:35:44 -04:00

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Dew Model Context Protocol (MCP) Server

The Dew Model Context Protocol (MCP) Server is a feature that allows AI agents to interact with your project. This enables you to integrate AI capabilities into your project management workflow, such as automated task creation, progress tracking, and more.

Package structure

The MCP feature is split across two packages to keep concerns separate:

packages/core defines the McpToolProvider interface. Any feature package that wants to expose tools to AI agents implements this interface — without needing to depend on the MCP server itself.
packages/mcp implements the actual server. It collects all registered McpToolProvider implementations and serves them over stdio using the dart_mcp package. Only the cli package depends on packages/mcp; feature packages like kanban remain decoupled from the transport layer.

Configuration

The MCP server is configured under the mcp key in .project/dew.yaml. By default it runs on localhost at port 8080.

dew:
  mcp:
    host: "localhost"
    port: 8080

See the Configuration documentation for full details.

Running the server

The MCP server uses stdio transport — the MCP client launches it as a child process and communicates over stdin/stdout. Because of this, the process must have clean stdout (no decorative output). melos run pollutes stdout with its own log lines, which corrupts the JSON-RPC channel.

Step 1 — Compile to a native binary

melos run compile

This produces .project/toolchain/bin/dew (or .project/toolchain/bin/dew.exe on Windows).

Step 2 — Configure your MCP client

Point your MCP client at the compiled binary. For example, in VS Code's MCP configuration:

{
  "mcpServers": {
    "dew": {
      "command": "/absolute/path/to/dew/.project/toolchain/bin/dew",
      "args": ["mcp", "serve"]
    }
  }
}

The server logs its startup message to stderr so it never interferes with the JSON-RPC channel on stdout.

Available tools

The following tools are registered by the kanban package:

Tool	Description
`kanban_create_ticket`	Create a new kanban ticket
`kanban_list_tickets`	List tickets, optionally filtered by column or type
`kanban_get_ticket`	Get a ticket by ID
`kanban_update_ticket`	Update one or more fields on an existing ticket
`kanban_delete_ticket`	Delete a ticket by ID

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