CaffeineTray v1.0.0 — ultra-light Windows tray caffeine

CaffeineTray 1.0.0

Ultra-light tray app that blocks idle sleep. Single portable EXE. No installer. No deps.

Highlights

• Left-click toggle; right-click menu
• Settings: Start enabled, Keep display awake, Run at startup
• About dialog; follows system dark/light
• Single-instance guard
• Re-applies after resume and unlock
• Icons embedded; reliable tray presence

Power behavior

• Uses SetThreadExecutionState
  • ES_SYSTEM_REQUIRED always when ON
  • ES_DISPLAY_REQUIRED when "Also keep display awake" is on
• Does not override manual sleep, lid-close, critical battery, or policy

Download

• Grab CaffeineTray.exe from Assets (win-x64, single-file, self-contained)
• Place anywhere and run

Quick verify

1. Turn ON (tray says "Caffeine: on")
2. Optional: enable "Also keep display awake"
3. Run: powercfg /requests
   • SYSTEM: [PROCESS] CaffeineTray.exe
   • DISPLAY appears only if display option enabled

Requirements

• Windows 11 or Windows 10 1607+ (x64)

License

• NFE-OSL v1.0 (see LICENSE)