Full-stack-skills tauri-app-single-instance

Prevent multiple app instances and handle second-launch arguments using the Tauri v2 single-instance plugin. Use when enforcing single-instance behavior, forwarding CLI arguments from a second launch, or focusing the existing window on re-entry.

install

source · Clone the upstream repo

git clone https://github.com/partme-ai/full-stack-skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/partme-ai/full-stack-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/tauri-skills/tauri-app-single-instance" ~/.claude/skills/partme-ai-full-stack-skills-tauri-app-single-instance && rm -rf "$T"

manifest: skills/tauri-skills/tauri-app-single-instance/SKILL.md

When to use this skill

ALWAYS use this skill when the user mentions:

Preventing multiple app instances from running
Handling second-launch arguments or deep links
Focusing the existing window when re-launched

Trigger phrases include:

"single instance", "prevent duplicate", "second launch", "one instance only"

How to use this skill

Install the single-instance plugin:

cargo add tauri-plugin-single-instance

Register the plugin in your Tauri builder with a callback:

tauri::Builder::default()
    .plugin(tauri_plugin_single_instance::init(|app, args, _cwd| {
        // Focus the main window when a second instance is launched
        if let Some(window) = app.get_webview_window("main") {
            window.set_focus().unwrap();
        }
        // Forward args to the running instance
        println!("Second launch args: {:?}", args);
    }))

The callback receives: the app handle, command-line arguments, and the working directory from the second launch
Combine with deep-linking to route
```
myapp://
```
URLs from the second instance to the existing window
Combine with CLI plugin to forward parsed arguments to the running app
The second instance exits automatically after the callback runs

Outputs

Single-instance plugin setup with window focus callback
Second-launch argument forwarding pattern
Integration with deep-linking and CLI plugins

References

https://v2.tauri.app/plugin/single-instance/

Keywords

tauri single instance, prevent duplicate, second launch, window focus, args