FA-36048 / Tab interfaces / Member archive

Unpin restoration: normal partition insertion · case 03

The tab workspace reports an incorrect normal partition insertion.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Unpin restores a tab after the remaining pin prefix at its saved unpinned rank, clamps rank to the current normal partition and restores surviving group membership.

Why this case matters

Offline tab/panel workspace behavior; no browser or desktop framework is emulated.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
workspace regression 0	`[["q"], 2, 3, ["p", "a", "b", "c", "extra0", "extra1"], "g", 1]`	`[["q"], 2, 3, ["a", "b", "p", "c", "extra0", "extra1"], "g", 1]`	Failed

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