FA-20530 / Assistive announcements / Member archive

Staged correction edits the first message in the frame · case 05

The announcement trace violates the stated announcement-transaction contract.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Nested announcement transactions stage text. Begin pushes a frame; append outside a frame speaks immediately. Commit merges into parent or speaks outer contents in order; rollback discards only the top frame. Replace edits only last staged item or appends when empty. Clear empties top frame. Flush cannot expose staged text. Report spoken and nested staged frames.

Why this case matters

Deterministic controlled model of assistive announcement delivery.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
trace-1	`[["outsideoutsideoutsideoutsideoutside", "second", "fixedfixedfixedfixedfixed", "second"], []]`	`[["outsideoutsideoutsideoutsideoutside", "second", "first", "fixedfixedfixedfixedfixed"], []]`	Failed

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