I think this covers the basics.
- Home assistant running under proxmox on an ancient hp micro server
- ZZH zigbee gateway stick
- Xiaomi/Aqara light switches, with one more switch than circuit going to switch to act as a button for lamps
- Ikea
- Bulbs for lamps
- undercounter strips with zigbee for office mood lights
- Nest hubs for music + 4 room house amp system
- Tado for heating