[restrictedolly]

How can I preserve the local configuration files I have with this container? (the custom slash commands, config.json etc)

[ffsm8]

Mount them to the local filesystem, maybe even as read-only so Claude cannot modify them.

It actually makes bootstrapping the dev env so much easier too, basically just take a template .devcontainers and you're golden. After that just tell Claude what files you want to mount to the filesystem and restart