FA-20997 / Assistive announcements / Member archive

Canceling one narrated task drops all progress tracking · case 02

The announcement trace violates the stated progress-narration contract.

Member previewVariant 2 · 3 implementations · 8 checks per implementation

Case contract

A task start records total and resets spoken milestone. Advance clamps monotone completion to total; a 25-percent bucket is announced only when it increases and before terminal status. Unknown total uses item-count messages. Complete announces exactly once, even for zero total. Fail announces failure and blocks progress. Retry reopens at zero and resets milestone. Rename affects future messages. Cancel drops task silently. Return speech and [id,done,status,bucket].

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-6	`[[], []]`	`[[], [["b", 0, "running", 0]]]`	Failed

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