# 0008: The default workspace is a primary-terminal 3×1 composition

Status: accepted for the native vertical slice.

Lumbridge defaults to three vertical bands in one column. The top 20% exposes
pane, agent, tools, context, goal, target, and attention state. The middle 60%
belongs to the active terminal or work surface. The bottom 20% holds answers,
choices, chat, approvals, and the local-analyst boundary.

This composition favors the surface where engineers type and read for most of
the day. It keeps context and decisions visible without making six equally sized
cards compete for attention. Pane selectors and keyboard shortcuts switch the
large work surface. Users may later create deliberate splits or dashboard grids,
but those are workspace choices rather than the default visual hierarchy.

The framework spike retains six updating surfaces even when five are offscreen.
That preserves the earlier streaming and reducer workload for performance
comparison. Hidden surfaces do not receive keyboard input merely because they
continue to update.

Window geometry determines the middle band's terminal rows and columns. The UI
resizes the terminal engine and PTY through the bounded runtime actor; it does
not resize only the text view or infer terminal wrapping after the fact.