To be utterly shameless, this what I've been building: https://github.com/ASIXicle/persMEM

Three persistent Claude instances share AMQ with an additional Memory Index to query with an embedding model (that I'm literally upgrading to Voyage 4 nano as I type). It's working well so far, I have an instance Wren "alive" and functioning very well for 12 days going, swapping in-and-out of context from the MCP without relying on any of Anthropic's tools.

And it's on a cheap LXC, 8GB of RAM, N97.