This is just a dump of some interesting undocumented features of webOS (3.8 specifically, on early 2018 4k LG TV) and other development-related tips.
- OpenVPN frontend (OpenVPN itself is easily buildable and runs on webOS TVs: https://discord.com/channels/407937994037919756/835489130967859251/906943542457401395)
- App autostart manager - dynamically update arbitrary app config and register it as input (see Registering an app as an input)
- webos-vncserver frontend with autostart option
- Package hyperiond into Piccap directly
- Quick Screenshot (expose HTTP port that just returns PNG of current screen contents)
- Custom IR remote codes editor/updater/blaster