I've always been interested in how "AI Assistants" work. There's now a ton of them out there. But you can run mine locally, and it has a couple of easter eggs ;-) as well as voice notes through telegram, connect MCP servers, and runs in a single Docker container needing less than 100MB of memory. Any issues/feature requests would be welcome:

https://github.com/mutablelogic/go-llm

No access to email/calendar directly, so that's the next thing.