Rust Magic Linter

Rust Magic Linter

Add strict Clippy lint configurations to Rust projects. These "guardrails" help AI agents write better Rust code by turning best practices into compiler errors.

Workflow

1. Verify this is a Rust project (check for Cargo.toml)
2. Ask which preset the user wants (if not specified)
3. Check if [lints.*] sections already exist in Cargo.toml
4. Detect workspace vs single project (use [workspace.lints.*] for workspaces)
5. Apply the configuration from assets
6. Create clippy.toml from assets
7. Optionally offer .cargo/deny.toml and CONSTITUTION.md
8. Run cargo clippy to verify

Presets

• minimal - Just panic guards: unwrap, expect, panic, allow_attributes, dbg_macro, todo. Use for quick safety net with minimal code changes.
• standard - Pedantic + async safety + output control. Recommended for most projects.
• maximum - All lint groups at deny level, minimal relaxations. Very strict, may require significant code changes.

Assets

All configuration files are in assets/:

• assets/minimal.toml - Minimal preset
• assets/standard.toml - Standard preset (recommended)
• assets/maximum.toml - Maximum preset (strictest)
• assets/clippy.toml - Complexity thresholds for project root
• assets/deny.toml - cargo-deny config for .cargo/deny.toml
• assets/CONSTITUTION.md - Project rules template

Applying Configurations

1. Read the appropriate preset from assets/
2. For workspaces: replace [lints. with [workspace.lints.
3. Append to Cargo.toml with a header comment
4. Copy assets/clippy.toml to project root
5. If user wants supply chain security: copy assets/deny.toml to .cargo/deny.toml
6. If user wants project rules: copy assets/CONSTITUTION.md to project root

Key Lints Explained

The most important lint is allow_attributes = "deny" - this prevents AI from bypassing errors by adding #[allow(clippy::...)]. The AI must actually fix the code.

Other critical lints:

• unwrap_used, expect_used, panic - Force proper error handling
• dbg_macro, todo - No debug leftovers or incomplete code
• print_stdout, print_stderr - Use tracing for structured logging
• await_holding_lock - Prevent async deadlocks

Repository

https://github.com/vicnaum/rust-magic-linter

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