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Split-pane divider allocation: The first pane consumes space reserved for the second minimum · case 03

The first pane consumes space reserved for the second minimum.

Member previewVariant 3 · 3 implementations · 10 checks per implementation

Case contract

Subtract divider from total; honor both minimums when feasible; otherwise share available width in proportion to minima; panes sum to available space.

Why this case matters

A deterministic model of split-pane divider allocation; this isolates one interface invariant without requiring a browser.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
second min	`[95, 5]`	`[70, 30]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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