One is pi.dev on the console, but because the KB is a git repository I have it on each computer. On top of that I also run Hermes Agent and have set up there one agent to be responsible for the KB stuff and that one I connected to a Matrix channel and can use it from the phone and any device where I have a matrix client like Element set up.

With pi.dev I use it in a container https://git.jeena.net/jeena/agent-container and selectively give it access to Firefox via https://github.com/ThinkerYzu/foxmcp when I want it to help me with something in the browser (doing taxes, applying for things online in a foreign language, etc.)