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feat(skills): add dotnet-mcp-builder, deprecate csharp-mcp-server-gen… (#1645)

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* feat(skills): add dotnet-mcp-builder, deprecate csharp-mcp-server-generator

Adds a comprehensive skill for building MCP (Model Context Protocol)
servers in C#/.NET against the official ModelContextProtocol 1.x NuGet
packages. Covers both transports (STDIO, Streamable HTTP — SSE is
deprecated) and every primitive in the current MCP spec (2025-11-25):
tools, prompts, resources, elicitation (form + URL mode), sampling,
roots, completions, logging, and MCP Apps. Includes a thin .NET MCP
client reference and testing guidance (MCP Inspector + in-memory
transport for unit tests).

Steers the model toward the current stable 1.x packages instead of the
0.x previews it tends to pin by default, and enforces the STDIO
stdout/stderr trap.

Also deprecates the existing csharp-mcp-server-generator skill, which
predates ModelContextProtocol 1.0 and only covered a subset of the
current spec. Its SKILL.md now redirects users to dotnet-mcp-builder so
existing install URLs keep working without surprises.

* fix: address PR review from aaronpowell

- Delete csharp-mcp-server-generator skill (rather than deprecating it)
- Update mcp-apps.md pitfalls section to reference .NET Tool.Meta type
  instead of the serialized _meta JSON property names
- Rebuild docs/README.skills.md

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

* chore: remove C# MCP development plugin files

* chore: remove csharp-mcp-development plugin entry from marketplace

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
This commit is contained in:
Adrien Clerbois
2026-05-11 01:35:26 +02:00
committed by GitHub
parent d944a73b58
commit 2c275f2ef9
20 changed files with 2272 additions and 122 deletions
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@@ -38,7 +38,6 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-plugins) for guidelines on how t
| [context-matic](../plugins/context-matic/README.md) | Coding agents hallucinate APIs. ContextMatic gives them curated, versioned API and SDK docs. Ask your agent to "integrate the payments API" and it guesses — falling back on outdated training data and generic patterns that don't match your actual SDK. ContextMatic solves this by giving the agent deterministic, version-aware, SDK-native context at the exact moment it's needed. | 2 items | api-context, api-integration, mcp, sdk, apimatic, third-party-apis, sdks |
| [copilot-sdk](../plugins/copilot-sdk/README.md) | Build applications with the GitHub Copilot SDK across multiple programming languages. Includes comprehensive instructions for C#, Go, Node.js/TypeScript, and Python to help you create AI-powered applications. | 1 items | copilot-sdk, sdk, csharp, go, nodejs, typescript, python, ai, github-copilot |
| [csharp-dotnet-development](../plugins/csharp-dotnet-development/README.md) | Essential prompts, instructions, and chat modes for C# and .NET development including testing, documentation, and best practices. | 9 items | csharp, dotnet, aspnet, testing |
| [csharp-mcp-development](../plugins/csharp-mcp-development/README.md) | Complete toolkit for building Model Context Protocol (MCP) servers in C# using the official SDK. Includes instructions for best practices, a prompt for generating servers, and an expert chat mode for guidance. | 2 items | csharp, mcp, model-context-protocol, dotnet, server-development |
| [database-data-management](../plugins/database-data-management/README.md) | Database administration, SQL optimization, and data management tools for PostgreSQL, SQL Server, and general database development best practices. | 6 items | database, sql, postgresql, sql-server, dba, optimization, queries, data-management |
| [dataverse-sdk-for-python](../plugins/dataverse-sdk-for-python/README.md) | Comprehensive collection for building production-ready Python integrations with Microsoft Dataverse. Includes official documentation, best practices, advanced features, file operations, and code generation prompts. | 4 items | dataverse, python, integration, sdk |
| [devops-oncall](../plugins/devops-oncall/README.md) | A focused set of prompts, instructions, and a chat mode to help triage incidents and respond quickly with DevOps tools and Azure resources. | 3 items | devops, incident-response, oncall, azure |