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Allow changing temperature of running instance (IPC/signal support) #75

@konzerterlebnisberichte

Description

Currently, changing the temperature requires killing the running hyprsunset process and starting a new one. This causes a brief flicker (screen goes to default colors before new filter applies) because hyprsunset doesn't allow two instances (A CTM manager is already running).

Request: Add a way to change temperature/gamma of a running instance, e.g.:

  • hyprsunset --set-temp 3000 that communicates with running instance
  • Signal-based (e.g. SIGUSR1 to reload from config)
  • hyprctl integration

This would enable flicker-free transitions for scripts like automatic day/night temperature adjustment.

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