dotMCP 0.3.0

dotMCP

MCP server that exposes a C# solution as a semantic graph over Roslyn, instead of requiring an LLM agent to grep files and re-parse text on every step.

What it's for

Connect this server to an MCP-capable client (Claude Code, VS Code + Copilot, Cursor, etc.) so the agent can navigate, analyze, and edit a C# solution through typed tool calls (get_type, get_call_graph, find_writes, rename_symbol, concurrency_audit, tests_run, and more) instead of raw file search-and-replace.

All tool responses are TOON-encoded (Token-Oriented Object Notation, spec v3): the same facts as JSON with camelCase keys and nulls omitted, at a fraction of the token cost — uniform result lists collapse into one header plus tabular rows.

See the repository at https://github.com/QsROg8320/SharpMCP — .claude/skills/dotmcp-tools/SKILL.md there documents all 61 tools with real tested examples, argument constraints, and known gaps.

Usage via NuGet (dnx)

VS Code / clients that use a "servers" config block:

{
  "servers": {
    "dotMCP": {
      "type": "stdio",
      "command": "dnx",
      "args": ["dotMCP@0.3.0", "--yes"]
    }
  }
}

qwen-code / Pi Coding Agent / other clients that use a plain "mcpServers" block (do not include "servers" or "type" here — those are VS Code-specific and will be rejected by these clients):

{
  "mcpServers": {
    "dotMCP": {
      "command": "dnx",
      "args": ["dotMCP@0.3.0", "--yes"]
    }
  }
}

Requires the .NET 10 SDK (for the dnx command) on the machine running the MCP client.

Environment variables

• DOTMCP_RELOAD_DEBOUNCE_SECONDS — quiet period of the file watcher before external edits trigger a workspace reload (default 60).
• DOTMCP_DEPLOY_SKILL=true — opt-in: deploy the bundled Claude Code skill doc on startup.
• DOTMCP_SKILLS_DIR — overrides the skills directory for that deployment.