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Incremental client response projection: Cancel freezes visible text · case 04

Cancel freezes visible text.

Member previewVariant 4 · 3 implementations · 70 checks per implementation

Case contract

The client stream view tracks a chunk cursor independently from rendered text. Per-frame budgets consume chunks including empty chunks. Completion waits for drain, and cancellation preserves committed text but discards pending output. Operation cancel-freezes-visible-text has the six explicit input/output oracles below.

Why this case matters

An offline client lifecycle model that isolates a state-management defect without DOM rendering or network services.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
cancel-freezes-visible-text scenario 4	`"oldab"`	`"old"`	Failed

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