The active tab was stored in Automerge's shared doc (activeLayerId),
causing different browser windows/sessions to fight over which tab
is highlighted. When one window switched to rInbox, another window
showing rFlows would have its tab bar update to highlight rInbox
while still displaying rFlows content.
Changes:
- Active tab is now always determined locally by the URL/currentModuleId
- Automerge sync only manages the tab LIST (which modules are open)
and flows, not which tab is active
- Removed sync.setActiveLayer() calls on tab switch
- Removed activeLayerId reads from Automerge on connect and on
remote change events
- TabCache continues to manage active state correctly when switching
tabs within the same page load
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett
2bc1b78f30