FA-39003 / Tree accessibility / Member archive

Inline branch rename transaction: Whitespace-only tree label is accepted · case 03

Whitespace-only tree label is accepted produces the wrong hierarchical widget state in a regression fixture.

Member previewVariant 3 · 3 implementations · 8 checks per implementation

Case contract

Rename completion is applied only to the same row incarnation and edit session. Empty trimmed labels are rejected, duplicate sibling labels are rejected case-insensitively, and failure leaves editing active. Successful rename preserves expansion/selection and restores focus to the renamed row only when editing owned focus.

Why this case matters

Offline executable model of a hierarchical accessibility interaction; inputs are bounded and valid as stipulated. No browser, assistive technology, or normative ARIA conformance is claimed.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
empty draft	`[{"a": "Taken", "b": "", "q": "Other"}, null, null, "b", ["b"], ["a"]]`	`[{"a": "Taken", "b": "Old", "q": "Other"}, "b", "invalid", "editor:b", ["b"], ["a"]]`	Failed

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

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