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# 0008: The default workspace is a primary-terminal 3×1 composition
Status: accepted for the native vertical slice.
Lumbridge defaults to three horizontal bands in one column. The top 20% exposes
pane, agent, tools, context, goal, target, and attention state. The middle 60%
is the terminal-first work region. The bottom 20% holds answers, choices, chat,
approvals, and the local-analyst boundary.
This composition favors the region where engineers type and read for most of the
day. It keeps context and decisions visible without making every surface a small
dashboard card. The middle region may contain a responsive number of vertical
work lanes under decision 0009; the selected lane alone owns keyboard input.
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 and lane geometry determine each terminal's 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.