jongalloway / jongalloway/dotnet-mcp

Opportunity: first-class MCP Apps APIs (SEP-1865)

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enhancement mcp-app priority: low
Dominant language
C#
Stars
36
Forks
3
PR merge metrics
No merged PRs in 30d

Description

Opportunity: first-class MCP Apps APIs (SEP-1865)

Part of #481.

The server already exposes McpAppsResources (DotNetMcp/Resources/McpAppsResources.cs). SDK 2.0 promotes MCP Apps to a structured extension with typed APIs: McpApps.ExtensionId (io.modelcontextprotocol/ui), McpUiToolMeta, and the [McpAppUi] attribute (diagnostic MCPEXP003, experimental).

Tasks
  • Evaluate moving McpAppsResources to the typed ModelContextProtocol.Extensions.Apps APIs.
  • Use McpApps.ExtensionId instead of any hard-coded identifier.
  • Note that the API remains experimental (MCPEXP003) and may change before the spec finalizes.
Acceptance
  • MCP Apps support uses the SDK's typed extension surface (or a documented decision to defer).

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start with DotNetMcp/Resources/McpAppsResources.cs and compare its current MCP Apps support with the SDK 2.0 typed APIs: ModelContextProtocol.Extensions.Apps, McpApps.ExtensionId, McpUiToolMeta, and [McpAppUi]. Done means the support uses that typed extension surface, or the repository documents a decision to defer while noting the MCPEXP003 experimental status.

Written by the indexing model from the issue text.

Assessment

Tech stack
csharp
Domain
api, backend
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Mostly clear
Newbie friendliness
48/100

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