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Update dotnet-mcp-builder skill to ModelContextProtocol 2.x (#2487)

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* Update dotnet-mcp-builder skill to ModelContextProtocol 2.x

Align the skill with the C# SDK 2.0.0 release and the MCP 2026-07-28
spec: stable line is now 2.x, HttpServerTransportOptions.Stateless
defaults to true, roots/sampling/MCP-channel logging are [Obsolete]
(MCP9005) with the multi-round-trip input_required pattern as the
replacement, discovery-first negotiation (server/discover) supersedes
the initialize handshake, Mcp-Method/Mcp-Name routable headers, raw
structuredContent for non-object results, required Tool.inputSchema,
and the new ModelContextProtocol.Extensions.Tasks and
ModelContextProtocol.Extensions.Apps packages (typed MCP Apps support
replacing the hand-rolled _meta/ui:// pattern on 1.x).

* Address Copilot review: Apps extension accuracy, header scope, capability ownership

- packages.md: the Apps package replaces the manual _meta wiring, not the
  ui:// resource; note the experimental MCPEXP003 diagnostic; label the
  1.x -> 2.0 list as highlights and add the OAuth/SSE runtime changes
  with a pointer to the full release notes.
- transport-http.md: Mcp-Method is on every POST, Mcp-Name only on named
  invocations (tools/call, prompts/get, resources/read) - do not require
  it globally at gateways.
- mcp-apps.md: current MIME type is text/html;profile=mcp-app (skybridge
  is a legacy draft value); document [McpAppUi] + WithMcpApps().
- server-features.md: roots/sampling are client capabilities, only
  logging sits on ServerCapabilities.

* Correct stateful HTTP guidance: 2026-07-28 has no HTTP sessions

Per the official SDK v2 elicitation docs, a server with Stateless=false
refuses the 2026-07-28 revision so dual-path clients fall back to an
initialize-capable revision; ElicitAsync cannot be used on 2026-07-28
Streamable HTTP at all. Reframe stateful HTTP as down-level
compatibility mode and document the multi-round-trip pattern
(InputRequiredException / InputRequest.ForElicitation, retry with
InputResponses -> ElicitResult) as the current-protocol way to ask
mid-tool, across SKILL.md, transport-http.md, and elicitation.md.
This commit is contained in:
Adrien Clerbois
2026-07-31 02:31:14 +02:00
committed by GitHub
parent ed3d68dd66
commit aa01464ccb
13 changed files with 69 additions and 44 deletions
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@@ -161,7 +161,7 @@ See [CONTRIBUTING.md](../CONTRIBUTING.md#adding-skills) for guidelines on how to
| [documentation-writer](../skills/documentation-writer/SKILL.md)<br />`gh skills install github/awesome-copilot documentation-writer` | Diátaxis Documentation Expert. An expert technical writer specializing in creating high-quality software documentation, guided by the principles and structure of the Diátaxis technical documentation authoring framework. | None |
| [dotnet-best-practices](../skills/dotnet-best-practices/SKILL.md)<br />`gh skills install github/awesome-copilot dotnet-best-practices` | Ensure .NET/C# code meets best practices for the solution/project. | None |
| [dotnet-design-pattern-review](../skills/dotnet-design-pattern-review/SKILL.md)<br />`gh skills install github/awesome-copilot dotnet-design-pattern-review` | Review the C#/.NET code for design pattern implementation and suggest improvements. | None |
| [dotnet-mcp-builder](../skills/dotnet-mcp-builder/SKILL.md)<br />`gh skills install github/awesome-copilot dotnet-mcp-builder` | Build Model Context Protocol (MCP) servers in C#/.NET against the current ModelContextProtocol 1.x NuGet packages. Especially helps with cases the model often gets wrong without guidance — stale preview versions (it tends to pick 0.3 or 0.4 preview), MCP Apps (interactive UI rendered in the host), elicitation URL mode, per-session HTTP wiring, OAuth and reverse-proxy deploy specifics, and debugging concrete MapMcp / STDIO / Streamable-HTTP errors. Also covers the routine work — STDIO and Streamable HTTP transports (SSE is deprecated), tools, prompts, resources, sampling, roots, completions, logging — and a basic .NET MCP client. Trigger when the user says or implies any .NET MCP server work: ModelContextProtocol, McpServerTool, MapMcp, WithStdioServerTransport, "MCP server in C#", "MCP tool in dotnet", "expose this as MCP", or names a primitive (prompt/resource/elicitation/MCP App) in a .NET context. Skip for MCP work in other languages. | `references/client.md`<br />`references/elicitation.md`<br />`references/mcp-apps.md`<br />`references/packages.md`<br />`references/prompt-primitive.md`<br />`references/resource-primitive.md`<br />`references/roots.md`<br />`references/sampling.md`<br />`references/server-features.md`<br />`references/testing.md`<br />`references/tool-primitive.md`<br />`references/transport-http.md`<br />`references/transport-stdio.md` |
| [dotnet-mcp-builder](../skills/dotnet-mcp-builder/SKILL.md)<br />`gh skills install github/awesome-copilot dotnet-mcp-builder` | Build Model Context Protocol (MCP) servers in C#/.NET against the current ModelContextProtocol 2.x NuGet packages. Helps with cases the model gets wrong without guidance — stale versions (0.x preview or 1.x-era defaults), the v2 stateless-by-default HTTP flip, the 2026-07-28 spec deprecations (roots/sampling/logging), MCP Apps and Tasks extension packages, elicitation URL mode, per-session HTTP wiring, OAuth and reverse-proxy deploy specifics, and debugging MapMcp / STDIO / Streamable-HTTP errors. Also covers STDIO and Streamable HTTP transports (SSE is deprecated), tools, prompts, resources, completions, and a basic .NET MCP client. Trigger when the user says or implies any .NET MCP server work: ModelContextProtocol, McpServerTool, MapMcp, WithStdioServerTransport, "MCP server in C#", "MCP tool in dotnet", "expose this as MCP", or names a primitive (prompt/resource/elicitation/MCP App) in a .NET context. Skip for MCP work in other languages. | `references/client.md`<br />`references/elicitation.md`<br />`references/mcp-apps.md`<br />`references/packages.md`<br />`references/prompt-primitive.md`<br />`references/resource-primitive.md`<br />`references/roots.md`<br />`references/sampling.md`<br />`references/server-features.md`<br />`references/testing.md`<br />`references/tool-primitive.md`<br />`references/transport-http.md`<br />`references/transport-stdio.md` |
| [dotnet-timezone](../skills/dotnet-timezone/SKILL.md)<br />`gh skills install github/awesome-copilot dotnet-timezone` | .NET timezone handling guidance for C# applications. Use when working with TimeZoneInfo, DateTimeOffset, NodaTime, UTC conversion, daylight saving time, scheduling across timezones, cross-platform Windows/IANA timezone IDs, or when a .NET user needs the timezone for a city, address, region, or country and copy-paste-ready C# code. | `references/code-patterns.md`<br />`references/timezone-index.md` |
| [dotnet-upgrade](../skills/dotnet-upgrade/SKILL.md)<br />`gh skills install github/awesome-copilot dotnet-upgrade` | Ready-to-use prompts for comprehensive .NET framework upgrade analysis and execution | None |
| [doublecheck](../skills/doublecheck/SKILL.md)<br />`gh skills install github/awesome-copilot doublecheck` | Three-layer verification pipeline for AI output. Extracts verifiable claims, finds supporting or contradicting sources via web search, runs adversarial review for hallucination patterns, and produces a structured verification report with source links for human review. | `assets/verification-report-template.md` |