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Incremental client response projection: Render budget prefix · case 05

Render budget prefix.

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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 render-budget-prefix 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
render-budget-prefix scenario 1	`["aaaaa", "b"]`	`["b", "c"]`	Failed

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