hermes - 💡(How to fix) Fix [Feature]: 支援白天/黑夜自動切換 Skin Auto-switch skin based on time of day or system theme [2 comments, 2 participants]

在使用 CLI 的過程中，白天和黑夜的環境光線差異很大——白天用深色主題看不清，黑夜用淺色主題刺眼。如果能自動根據時間或系統主題切換 skin，能大幅提升使用體驗。Hermes Agent already has excellent skin support with multiple built-in themes, including light variants (daylight, warm-lightmode) and dark variants (default, mono, ares, slate, etc.). However, switching between them currently requires manual action — either /skin <name> during a session or editing display.skin in config.yaml.

When using the CLI throughout the day, ambient lighting changes significantly: dark themes become hard to read in bright environments, and light themes are harsh on the eyes at night. Automatic skin switching based on time or system theme would greatly improve the user experience.

2. 系統主題自動跟隨模式（macOS）
   - 偵測 macOS 的 Light/Dark Mode 設定
   - 透過 defaults read -g AppleInterfaceStyle 判斷
   - 自動對應到 light 或 dark 系列的 skin
   - 範例設定：
     yaml
     display:
       skin_follow_system: true
       skin_dark: mono
       skin_light: daylight

2. System theme follow mode (macOS)
   - Detect macOS Light/Dark Mode setting
   - Check via defaults read -g AppleInterfaceStyle
   - Auto-map to corresponding light/dark skin
   - Example config:
     yaml
     display:
       skin_follow_system: true
       skin_dark: mono
       skin_light: daylight

Relevant code locations:
- Skin engine: hermes_cli/skin_engine.py
- Skin switching command: cli.py (the /skin slash command handler)
- Config key: display.skin