FA-21189 / Assistive announcements / Member archive

Ordinary direct message carries a zero coalescing count · case 04

The announcement trace violates the stated quiet-session contract.

Member previewVariant 4 · 3 implementations · 8 checks per implementation

Case contract

Quiet nesting is a counter. Enter increments; leave decrements without going negative. Ordinary messages during quiet replace a per-topic summary [latest,count], emergency speech always emits immediately. Final leave emits summaries in topic first-seen order as [topic,latest,count]. Remove-topic discards only that summary. Reset quiet silently discards backlog. Ordinary speech outside quiet emits directly with count1. Report output, nesting and pending summaries.

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-7	`[[["a", "directdirectdirectdirect", 0]], 0, []]`	`[[["a", "directdirectdirectdirect", 1]], 0, []]`	Failed

MEMBER ARCHIVE

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

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