FA-39058 / Tree accessibility / Member archive

Hierarchical clipboard root normalization: Subtree clipboard omits root or descendants · case 03

Subtree clipboard omits root or descendants produces the wrong hierarchical widget state in a regression fixture.

Member previewVariant 3 · 3 implementations · 7 checks per implementation

Case contract

Copy or cut operates on selected topmost roots only, excluding descendants of a selected root. Roots follow tree order. Cut excludes read-only roots, retains protected selection, and advertises a move only within the same tree generation. Clipboard payload carries selected root paths and descendants once.

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
cut normalized	`[["a"], ["a"], {"a": ["z", "a"]}, ["a"], "move", ["b", "q"], "a"]`	`[["a"], ["a", "b", "c"], {"a": ["z", "a"]}, ["a"], "move", ["q"], "a"]`	Failed

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

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