FA-11394 / Accessibility interaction semantics / Member archive

A visible child escapes a hidden ancestor · case 04

A descendant remains exposed despite a hidden container.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Input is preorder [id,parent_id,hidden] for a forest with unique IDs and parents preceding children. Return exposed IDs in input order; any hidden ancestor excludes a node even if its own hidden flag is false.

Why this case matters

A controlled offline accessibility-data model. It isolates the stated contract; it does not simulate browser accessibility APIs or claim full ARIA conformance.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
hidden grandparent	`["b", "4"]`	`[]`	Failed

MEMBER ARCHIVE

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

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