Rebuilding a devcontainer discards any chats in the Github Copilot "Agents" window #11938

• VSCode Version: 1.144.1
• Local OS Version: MacOS 26.7.1
• Remote OS Version: Debian GNU/Linux 12 (bookworm) (vite-plus base image, running as the default rootless "vp" user)
• Remote Extension/Connection Type: Dev Containers

Steps to Reproduce:

1. Start a devcontainer normally (i.e. "Rebuild and reopen in devcontainer" via command pallette)
2. Open the agents window from the top of the VSCode window
3. Start a new chat instance in a new worktree
4. Rebuild devcontainer (Either with or without cache - Same in both instances)
5. Chats are no longer visible to continue

I've confirmed the chats aren't hidden by one of the filters.

Do agent chats need to be mounted in a volume to persist across sessions, and if so, which directories should be persisted?

Does this issue occur when you try this locally?: No
Does this issue occur when you try this locally and all extensions are disabled?: No

Screenshots available here: https://imgur.com/a/nczmch6