What is rust-mcp-server copilot-instructions.md?

Project instructions for building a Rust-based MCP server, including its communication method, asynchronous structure, dependencies, and required tool behaviour. Rust is a programming language, and MCP is a standard for connecting AI applications to tools.

Use them when developing or reviewing the server, including its JSON-RPC communication, tools, resources, logging, error handling, formatting, and checks.

They give coding agents consistent rules for understanding and changing this particular server.

How Vaiz/rust-mcp-server configures GitHub Copilot

Reuse

Borrowing it

Nothing to install: this file belongs to Vaiz/rust-mcp-server. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/Vaiz/rust-mcp-server/master/.github/copilot-instructions.md

Clone the repo

git clone --depth 1 https://github.com/Vaiz/rust-mcp-server

Made for: GitHub Copilot.

Wrote 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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/vaiz/rust-mcp-server/copilot-instructions/github.svg)](https://agentmods.dev/instructions/vaiz/rust-mcp-server/copilot-instructions)

Your own site

<a href="https://agentmods.dev/instructions/vaiz/rust-mcp-server/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/vaiz/rust-mcp-server/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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/vaiz/rust-mcp-server/copilot-instructions"><img src="https://agentmods.dev/badge/instructions/vaiz/rust-mcp-server/copilot-instructions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 691 This file is loaded in full into every session.

When invoked 691 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

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	$0.00691	$0.00691
Opus 5.5	$0.00276	$0.00276
Sonnet 5.5	$0.00138	$0.00138
Haiku 4.5	$0.00069	$0.00069

Measured 2mo ago against content hash 536319f210ea, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rust-mcp-server 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 2mo 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.

.github/copilot-instructions.md · 72 lines

How it starts

The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Copilot Instructions for Rust MCP Server

This is a Rust implementation of a Model Context Protocol (MCP) server.

Project Context

Language: Rust
Protocol: Model Context Protocol (MCP)
Communication: JSON-RPC over stdio
Architecture: Async/await with Tokio runtime

Key Guidelines

Follow Rust best practices and idioms
Use proper error handling with Result<T, E> and ohno::AppError for error propagation
Implement MCP protocol methods according to the specification
Use structured logging with the tracing crate
Ensure all async operations are properly awaited

MCP Protocol Implementation

Initialize: Handle client initialization and capability negotiation
Tools: Implement tool listing and execution
Resources: Handle resource discovery and reading
Logging: Support MCP logging protocol

Dependencies

tokio: Async runtime
serde: Serialization/deserialization
rmcp: MCP protocol handling
ohno: Error handling
tracing: Structured logging

AI Agent Guidelines

1. Always Use Rust MCP Tools

Use #cargo-check for quick code validation
Use #cargo-clippy for linting
Use #cargo-fmt for code formatting
Use #cargo-test for running tests

2. use @rust-docs subagent

For any questions about public API for dependencies or standard library, consult the @rust-docs subagent. Just ask it what you looking for in natural language, and it will fetch the relevant documentation for you.

2. Development Workflow

Follow this systematic approach when working on code changes:

Check current state: Use #cargo-check with all_targets: true, all_features: true
Make changes: Edit code using appropriate development tools
Validate: Use #cargo-clippy with workspace: true, all_targets: true
Format: Use #cargo-fmt with all: true
Test: Use #cargo-test with all_features: true
Build: Use #cargo-build with all_targets: true, all_features: true for final verification
Check unused dependencies: Use #cargo-machete to identify unused dependencies
Verify security compliance: Use #cargo-deny-check to ensure security and licensing compliance

Read the full file on GitHub · 72 lines

Changes

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.

2mo ago First seen · 72 lines · 691 tokens per session scan A 536319f210ea

Subscribe to this mod's changes

rust-mcp-server copilot-instructions.md is an instructions file published in the GitHub repository Vaiz/rust-mcp-server (38 stars, last pushed 2mo ago), licensed Unlicense. It adds 691 tokens to every session, about $0.0028 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.

Building agents Languages Rust mcp-server

rust-mcp-server copilot-instructions.md next to 6 instructions from other repositories
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rust-mcp-server: Instructions file for GitHub Copilot