add-plugin

name	add-plugin
description	Research and create a new plugin for the day/night cycle automation. Use when user asks to "add a plugin for [app name]" or "add support for [app name]".
allowed-tools	WebSearch, WebFetch, Read, Write, Edit, Glob, Grep, Bash

Add Plugin

Automatically research and create a new plugin for the day/night cycle automation system.

Overview

This skill helps you add support for new applications to the day/night cycle automation. Given an app name, it will:

1. Research how theme switching works for the application
2. Identify configuration file locations or APIs
3. Create a new plugin file in the plugins/ directory
4. Register the plugin in plugins/plugin.go Registry map
5. Provide configuration examples

Instructions

When adding a plugin, follow these steps:

1. Research Phase

First, understand how theme switching works for the target application:

• Search for official documentation on theme/appearance switching
• Look for configuration file locations (JSON, YAML, plist, etc.)
• Check for AppleScript support on macOS
• Investigate CLI commands or APIs
• Review GitHub issues or community discussions about automation

Key questions to answer:

• Where are theme settings stored?
• What file format is used?
• What are the exact theme/preset names?
• Does the app support live reloading of settings?
• Are there any special requirements or permissions needed?

2. Implementation Phase

Create a new plugin file in the plugins/ directory:

Read existing plugins first:

Read: plugins/iterm2.go  # or any other plugin as example
Read: plugins/plugin.go  # for helper functions

Create new file: plugins/[app_name].go

Plugin function signature:

package plugins

func [AppName](cfg map[string]interface{}, isLight bool) error {
    // Implementation
}

Implementation patterns by type:

1. JSON Config Files:

   • Use helper: UpdateJSONTheme(path, key, value) from plugins/plugin.go
   • Or read current file into struct or map
   • Update theme property
   • Marshal and write back
   • Verify write succeeded

2. AppleScript (macOS apps):

   • Use exec.Command("osascript", "-e", script)
   • Set appropriate timeout
   • Handle errors gracefully

3. CLI Commands:

   • Use exec.Command() with arguments
   • Check error return values
   • Capture and handle stderr

Available helpers in plugins/plugin.go:

• UpdateJSONTheme(path, key, value) - Update JSON config files
• ExpandPath(path) - Expand ~ in file paths

Error handling requirements:

• Return descriptive errors using fmt.Errorf()
• Handle file not found separately from other errors
• Print helpful messages to stderr when appropriate

3. Integration Phase

Register the plugin in the Registry:

Edit plugins/plugin.go:

var Registry = map[string]Func{
    // ... existing plugins
    "[app-name]": [AppName],
}

Test the plugin:

# Build first
make build

# Test light mode
./bin/day-night-cycle --config config.yaml light

# Test dark mode
./bin/day-night-cycle --config config.yaml dark

# Check status
./bin/day-night-cycle --config config.yaml status

4. Documentation Phase

Provide the user with:

1. Configuration example for config.yaml:

plugins:
  - name: [app-name]
    enabled: true
    # Include any custom options discovered

2. Setup instructions if needed:
   • Where to find theme names
   • Any prerequisites or permissions
   • How to verify it's working

Checklist

Before completing the task, verify:

• New plugin file created in plugins/ directory (e.g., plugins/vscode.go)
• File has package plugins declaration
• Function signature matches func [AppName](cfg map[string]interface{}, isLight bool) error
• Extracts config values with proper type assertions
• Handles both light and dark modes based on isLight parameter
• Returns descriptive errors
• Plugin registered in plugins/plugin.go Registry map
• Configuration example provided
• Basic testing completed

Example Usage

User: "Add a plugin for Visual Studio Code"

Expected workflow:

1. Research VS Code settings location and theme configuration
2. Discover settings.json at ~/Library/Application Support/Code/User/settings.json
3. Find that theme is controlled by workbench.colorTheme property
4. Create plugins/vscode.go with VSCode function
5. Register in plugins/plugin.go Registry map as "vscode"
6. Provide config example with popular theme names
7. Test the implementation

Common Pitfalls

• Don't guess paths or APIs - Always research first
• Check for platform differences - macOS vs Linux vs Windows
• Verify theme names - Use exact names from the application
• Test error cases - What if app isn't installed?
• Consider permissions - Some apps may need accessibility permissions

Resources

• Existing plugins: See files in plugins/ directory for implementation patterns
• Plugin helpers: See plugins/plugin.go for available helper functions
• Plugin patterns: See plugin-patterns.md in this skill directory

Notes

• Always read existing plugin files in plugins/ directory before implementing
• Each plugin gets its own file (e.g., plugins/iterm2.go)
• Use helper functions from plugins/plugin.go when appropriate
• Follow the patterns from existing plugins
• Research thoroughly before implementing
• Return descriptive errors
• Test both light and dark mode transitions