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rust-cargo-docs-rag-mcp: Instructions file for Claude Code

CLAUDE.md

rust-cargo-docs-rag-mcp CLAUDE.md is an instructions file for Claude Code from PromptExecution/rust-cargo-docs-rag-mcp. It costs 277 tokens per session, scanned A, original, from a forked repository, MIT.

A set of Claude Code instructions for developing a Rust MCP server that provides Rust documentation tools. It covers how to build, run, test, format, check, and structure the project.

In plain words
What is it for?
Use it when working on this Rust documentation server, especially for running tests, checking code, and following its architecture and style guidelines.
Why use it?
It gives contributors one place to find the project’s development commands and coding rules.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md.

This is PromptExecution/rust-cargo-docs-rag-mcp's own configuration. It tells Claude Code how to work on rust-cargo-docs-rag-mcp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything rust-cargo-docs-rag-mcp configures →

not rated 19repo 3mo ago A scan 277 tokens fork MIT archived
View source ↗ PromptExecution/rust-cargo-docs-rag-mcp
Reuse

Borrowing it

Nothing to install: this file belongs to PromptExecution/rust-cargo-docs-rag-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.

Copy the file
curl -O https://raw.githubusercontent.com/PromptExecution/rust-cargo-docs-rag-mcp/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/PromptExecution/rust-cargo-docs-rag-mcp

Made for: Claude Code.

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Per session 277 This file is loaded in full into every session.
When invoked 277 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 fork From a forked repository.
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00277 $0.00277
Opus 5.5 $0.00111 $0.00111
Sonnet 5.5 $0.00055 $0.00055
Haiku 4.5 $0.00028 $0.00028

Measured 2mo ago against content hash 4ad6ba3d9531, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

rust-cargo-docs-rag-mcp CLAUDE.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.

CLAUDE.md · 26 lines

What it actually says

CrateDocs MCP Development Guide

Build Commands

  • Build project: cargo build
  • Run STDIN/STDOUT server: cargo run --bin stdio-server
  • Run HTTP/SSE server: cargo run --bin axum-docs
  • Run tests: cargo test
  • Run specific test: cargo test test_name
  • Format code: cargo fmt
  • Check code: cargo clippy

Code Style Guidelines

  • Naming: Use snake_case for functions/variables, CamelCase for types/structs
  • Error Handling: Use Result<T, ToolError> for functions that can fail
  • Imports: Organize imports by external crates first, then internal modules
  • Async: Use async/await with proper error propagation using ? operator
  • Documentation: Include doc comments for public functions and structs
  • Error Messages: Be specific and descriptive in error messages
  • Caching: Implement caching for repeated operations when appropriate
  • Responses: Return structured responses via Content::text()

Project Architecture

  • Implements MCP protocol for Rust documentation tools
  • DocRouter is the core component for handling tool requests
  • Uses reqwest for API requests, tokio for async runtime
  • Async handlers for all tool implementations
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.

  1. 2mo ago First seen · 26 lines · 277 tokens per session scan A 4ad6ba3d9531

Subscribe to this mod's changes

rust-cargo-docs-rag-mcp CLAUDE.md is an instructions file published in the GitHub repository PromptExecution/rust-cargo-docs-rag-mcp (19 stars, last pushed 3mo ago), licensed MIT. It adds 277 tokens to every session, about $0.0011 per session on Opus 5.5. A static security scan graded it A with 0 findings. It comes from a forked repository.

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