Registry Inspector Rail
This installable rail is the expanded companion surface for a selected preview item, with built-in ready, loading, and empty states.
Review the conceptual usage rules on App Surfaces · Inspector Rail, then come back here for the installable component contract.
Inspector Detail Rail
This installable rail is the expanded supporting surface for the selected preview item. It is not a debug-only panel.
What it is for
Hold grouped metadata, longer rationale, and richer next-step actions without overloading the thread preview.
Use when
The user needs more context than a preview card can safely hold, but not a full screen change.
Do not use when
The content is the primary task itself or requires a true workspace.
Related patterns
Registry Items · List Detail Shell · App Surfaces · Inspector Rail
Escalation path
Supporting rail → fullscreen workspace only if editing or visual exploration grows.
Developer details
Start from these files when you need to trace the live implementation.
shared/ui/chat/InspectorDetailRail.tsx
Ready state
Expanded detail after the user selects a preview card.
Loading state
Use while the richer supporting detail is still being composed.
Empty state
Use before anything has been selected.