Home Assistant REST API

Docs: https://developers.home-assistant.io/docs/api/rest/

NixOS extraComponents bundles integration code, but config-flow-only integrations (Spotify, Matter, HomeKit Controller, Cast, etc.) require the REST API or UI to complete setup.

hass-cli (preferred for inspection/simple calls)

home-assistant-cli is installed on the NUC. Prefer it over raw curl for entity listing, service calls, device/area management, and event watching.

# On NUC (after getting a token):
export HASS_SERVER=http://localhost:8123
export HASS_TOKEN=<token>