On macOS I've verified the whole flow end to end: set up sharing, switch accounts, and older Code conversations open in every account. On Windows and Linux the automated tests pass (junctions on Windows, symlinks on Linux), but I haven't seen it on a real Claude Desktop install yet.
If you use Claude Desktop with more than one account on Windows or Linux, I'd love a quick report:
Your OS and Claude Desktop version
What the preview said (how many account/org folders it found)
After switching accounts, did older Code sessions appear and open?
Personal and work Claude accounts? Every switch hides your local Claude Code sessions. My Shared Claude links them into one session list: double-click setup, a preview before anything changes, and one-step undo. Free and open source for Mac, Windows and Linux.