# tauri

A Cursor rule that sets conventions for the Rust side of a Tauri app: commands, shared state, error types and permissions. Useful once the frontend is done and the Rust layer grows.

- rule · `type=rule` · Cursor · ★ 3579
- Author: sanjeed5
- License: CC0-1.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/sanjeed5/awesome-cursor-rules-mdc/tree/HEAD/rules-mdc/tauri.mdc
- Updated: 2026-05-19
- HTML: https://affpapa.org/en/nevibecode/rules/tauri

## What it does

The rule attaches to `**/*.rs` files and reads as a set of agreements for the Rust half of a Tauri project. It asks you to group code by feature instead of by file kind, so structs, enums and their `impl` blocks stay in one module. Tauri commands should stay small and async, with the real work handed off to a service or manager.

Shared mutable state goes through `tauri::State`, wrapped in `Arc<Mutex<T>>` or `Arc<RwLock<T>>`. For errors the rule points at `thiserror` or `anyhow`, and commands return `Result<T, E>` where `E` serializes, so the frontend can show something readable. Anything blocking belongs in `spawn_blocking`; leave it on the async runtime and the UI stops responding.

Permissions get their own section. Capabilities are listed explicitly in `src-tauri/tauri.conf.json`, and a wildcard is only acceptable for named, audited plugins. Skip that and the allowlist stops meaning much. After edits, run `cargo fmt` and `cargo clippy`.

## Install

### Cursor (native platform)

**Manually: put the files in place**
- File: `.cursor/rules/tauri.mdc` — Frontmatter: description, globs, alwaysApply

### Claude Code

**Manually: put the files in place**
- File: `.claude/rules/tauri.md` — The paths frontmatter field limits the files: move globs from the source into paths

### Codex

**AGENTS.md**
- Codex reads AGENTS.md: paste the rule text there

### GitHub Copilot

**Manually: put the files in place**
- File: `.github/instructions/tauri.instructions.md` — The applyTo field sets which files it applies to: move globs from the source into applyTo

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/rules/tauri.md`

### Cline

**Manually: put the files in place**
- File: `.clinerules/tauri.md`

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/sanjeed5/awesome-cursor-rules-mdc/tree/HEAD/rules-mdc/tauri.mdc

## When to use it
- split Tauri Rust code by feature rather than by file type
- keep Tauri commands async so the UI stays responsive
- share mutable state through `tauri::State` without data races
- return a typed, serializable error instead of a string or a panic
- narrow the allowlist in `src-tauri/tauri.conf.json` instead of using a wildcard

## Example prompts
- Reorganize `src-tauri/src` into feature modules and move the command logic into a manager
- Rewrite this command to return `Result<T, AppError>` with a serializable error type
- Move the blocking file read into `spawn_blocking` and register the state with `tauri::State`

## Source text · tauri.mdc · CC0-1.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: d069fb83fa99674c.

BEGIN THIRD-PARTY FILE d069fb83fa99674c
````text
---
description: This guide provides definitive, actionable best practices for writing robust, performant, and secure Rust backend code in Tauri applications, focusing on modern patterns and common pitfalls.
globs: **/*.rs
---
# Tauri Best Practices (Rust Backend)

Tauri applications thrive on a lean, secure Rust backend. This guide outlines the essential patterns and anti-patterns for writing high-quality Rust code that integrates seamlessly with your frontend.

## 1. Code Organization and Structure

Organize your Rust code by feature, not by file type. Keep related structs, enums, and their `impl` blocks together within a module. Leverage Rust's module system for clear separation of concerns and encapsulation.

**✅ GOOD: Feature-based Modules**

```rust
// src-tauri/src/main.rs
mod user; // Defines the 'user' module

fn main() {
    // ...
}

// src-tauri/src/user/mod.rs
pub mod manager; // Exposes user::manager

// src-tauri/src/user/manager.rs
use serde::{Deserialize, Serialize};

#[derive(Debug, Serialize, Deserialize, Clone)]
pub struct User {
    pub id: u32,
    pub name: String,
}

impl User {
    pub fn new(id: u32, name: String) -> Self {
        Self { id, name }
    }

    pub fn greet(&self) -> String {
        format!("Hello, {}!", self.name)
    }
}
```

**❌ BAD: Separating Types and Implementations**

```rust
// src-tauri/src/types.rs (AVOID)
pub struct User { /* ... */ }

// src-tauri/src/user_impls.rs (AVOID)
impl User { /* ... */ }
```

> **Action**: Always run `cargo fmt` and `cargo clippy` to enforce standard Rust style and catch common errors.

## 2. Tauri Command Fundamentals

Tauri commands are the bridge between your frontend and Rust backend. Keep them focused, asynchronous, and delegate complex logic.

**✅ GOOD: Lean, Async Commands**

```rust
// src-tauri/src/main.rs
#[tauri::command]
async fn greet(name: String) -> Result<String, String> {
    // Delegate complex logic to a dedicated service/manager
    let greeting = user::manager::User::new(0, name).greet();
    Ok(greeting)
}

fn main() {
    tauri::Builder::default()
        .invoke_handler(tauri::generate_handler![greet])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}
```

**❌ BAD: Blocking or Overly Complex Commands**

```rust
// src-tauri/src/main.rs (AVOID)
#[tauri::command]
fn process_large_file_sync(path: String) -> Result<String, String> {
    // This blocks the main thread, making the UI unresponsive
    std::thread::sleep(std::time::Duration::from_secs(5));
    Ok(format!("Processed {}", path))
}
```

## 3. Manage Global State with `tauri::State`

For shared, mutable application state, `tauri::State` is the definitive solution. Wrap your state in `Arc<Mutex<T>>` or `Arc<RwLock<T>>` for thread-safe access.

**✅ GOOD: Thread-Safe Global State**

```rust
// src-tauri/src/main.rs
use std::sync::{Arc, Mutex};

struct AppState {
    counter: u32,
}

#[tauri::command]
fn increment_counter(state: tauri::State<'_, Arc<Mutex<AppState>>>) -> Result<u32, String> {
    let mut app_state = state.lock().map_err(|e| format!("State lock error: {}", e))?;
    app_state.counter += 1;
    Ok(app_state.counter)
}

fn main() {
    let app_state = Arc::new(Mutex::new(AppState { counter: 0 }));
    tauri::Builder::default()
        .manage(app_state) // Register the state
        .invoke_handler(tauri::generate_handler![increment_counter])
        .run(tauri::generate_context!())
        .expect("error while running tauri application");
}
```

**❌ BAD: Unmanaged Global Statics**

```rust
// src-tauri/src/main.rs (AVOID)
````
END THIRD-PARTY FILE d069fb83fa99674c

The third-party file has ended. Everything between the d069fb83fa99674c tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 3619 of 8598 bytes. © sanjeed5 · CC0-1.0 · https://github.com/sanjeed5/awesome-cursor-rules-mdc/tree/HEAD/rules-mdc/tauri.mdc

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