Borrowing it
Nothing to install: this file belongs to jongalloway/dotnet-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/jongalloway/dotnet-mcp/main/.github/copilot-instructions.mdgit clone --depth 1 https://github.com/jongalloway/dotnet-mcpWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/instructions/jongalloway/dotnet-mcp/copilot-instructions)<a href="https://agentmods.dev/instructions/jongalloway/dotnet-mcp/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/jongalloway/dotnet-mcp/copilot-instructions/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/instructions/jongalloway/dotnet-mcp/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/jongalloway/dotnet-mcp/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.04030 | $0.04030 |
| Opus 5.5 | $0.01612 | $0.01612 |
| Sonnet 5.5 | $0.00806 | $0.00806 |
| Haiku 4.5 | $0.00403 | $0.00403 |
Grade A, and why
dotnet-mcp copilot-instructions.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 407 lines — stays where its author put it; the contents beside it link to each section on GitHub.
GitHub Copilot Instructions for .NET MCP Server
Project Overview
This project is an MCP (Model Context Protocol) server that integrates with the .NET SDK. It provides both CLI command execution and direct SDK integration through official NuGet packages, offering rich metadata access and type-safe operations.
Important: This package is designed exclusively as an MCP server for AI assistants. It is not intended for use as a library or for programmatic consumption in other .NET applications. The only supported use case is running it as an MCP server via dnx or dotnet run.
Key Technologies
- .NET 10.0 and .NET 11.0 RC3 or GA: Dual-targeted server and tests;
global.jsonspecifies an RC3 SDK minimum withlatestPatchroll-forward within 11.0.1xx. Shared CI setup automatically installs GA when published; exact-RC3 regression/package lanes remain pinned. - Model Context Protocol SDK: Version 2.0.0, with matching
ModelContextProtocol.Extensions.Tasks - Stdio Transport: Communication via standard input/output
- Microsoft.Extensions.Hosting: For application lifecycle management
- Microsoft.TemplateEngine.*: v10.0.403 for
net10.0, v11.0.100-rc.3.26522.148 fornet11.0; keep dependency groups target-specific - Microsoft.Build.*: MSBuild integration for framework validation (v18.9.6)
NuGet.Config adds the public dotnet-tools feed for RC3's NuGet 8 dependencies. Packaged tools include those dependencies and do not require the feed at installation. Both targets expose the same MCP tools, and project defaults remain .NET 10 LTS. RollForward=Minor does not permit backward or cross-major runtime selection. Verify generated runtimeconfigs and packaged tool execution, not just project builds.
Architecture
The stdio server supports MCP 2026-07-28 and legacy initialization. Register Tasks through WithTasks using the extension's shared store; do not restore obsolete ToolTaskSupport attributes or advertise legacy experimental Tasks. Preserve InputRequiredException and cancellation through tool filters. Current-protocol logging requires a per-request log level, and client-dependent capability flags must use request-scoped context. Governance must remain fail-closed; see doc/mcp-governance.md for the existing full-catalog scanner restriction.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 3d ago Changed · +1 lines · +177 tokens per session caad2487b8ca
- 7d ago Changed · +2 lines · +117 tokens per session 5747c13d4960
- 2mo ago First seen · 404 lines · 3,736 tokens per session scan A b5e230b5821f
dotnet-mcp copilot-instructions.md is an instructions file published in the GitHub repository jongalloway/dotnet-mcp (37 stars, last pushed yesterday), licensed MIT. It adds 4,030 tokens to every session, about $0.0161 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
dotnet-mcp copilot-instructions.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| dotnet-mcp copilot-instructions.mdjongalloway/dotnet-mcp | Instructions file | 37 | yesterday | MIT | A | 4,030 | GitHub Copilot |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |