dotnet-mcp-builder SKILL.md skillA
dotnet-mcp-builder from github/awesome-copilot is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add github/awesome-copilot/dotnet-mcp-builder@git:20260731.aa01464Pins git:20260731.aa01464 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- github/awesome-copilot
- Path
skills/dotnet-mcp-builder/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260731.aa01464, committed Jul 31, 2026
- First version recorded
- May 10, 2026
- Size
- 8,614 bytes
- Repository stars
- 40,941
- License
- MIT
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…
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Building MCP servers in .NET This skill helps you write production-quality MCP servers and basic clients in C#/.NET against the **official** [`ModelContextProtocol`](https://www.nuget.org/profiles/ModelContextProtocol) NuGet packages, maintained by Microsoft and the MCP project. It targets the **stable 2.x** line and the current spec (2026-07-28). ## When this skill earns its keep The .NET MCP SDK had years of preview packages (`0.x-preview`) before reaching `1.0`, and v2 flipped several defaults. Without help, the model tends to: - Pin a stale preview version that won't compile against current samples. - Apply 1.x-era defaults that v2 reversed (HTTP was stateful by default; in 2.x `Stateless` defaults to `true`). - Recommend capabilities the 2026-07-28 spec deprecates (roots, sampling, MCP-channel logging — now `[Obsolete]`, warning `MCP9005`). - Miss recent spec features (multi-round-trip `input_required`, discovery-first negotiation, MCP Apps/Tasks extension packages, elicitation URL mode, structured content blocks). - Get HTTP transport details wrong (stateful/stateless, proxy buffering, OAuth wiring). - Forget the STDIO stdout/stderr trap. …
Read the whole file at its exact version.
How to install
mdr add github/awesome-copilot/dotnet-mcp-builder@sha256:7860696a124e61fcThe line at the top of this page pins the label git:20260731.aa01464, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_gjaqektukjcml4ac)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 10, 2026 and Jul 31, 2026, about one every 81 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260731.aa01464 latest | 2026-07-31 | aa01464 | 8,614 B | A | view · diff |
| git:20260510.2c275f2 | 2026-05-10 | 2c275f2 | 6,904 B | A | view |
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8614 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
github/awesome-copilot · 40,941 stars · license MIT · pushed 2026-11-09 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_gjaqektukjcml4ac GET https://markdownregistry.com/api/v1/resolve?ref=github/awesome-copilot/dotnet-mcp-builder GET https://markdownregistry.com/api/v1/blob/7860696a124e61fc1fa6bb38f9c79f6be6eda130e245a814e41f0e7030d09619
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.