FA-100799 / Model output stopping rules / Member archive

Output stopping: A stop sequence split across chunks is missed · case 04

A stop sequence split across chunks is missed.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Given chunks and a nonempty stop string, concatenate logically and return emitted text before first occurrence and stop flag. Chunk boundaries have no semantic effect.

Why this case matters

A deterministic output-control model isolates one finish or streaming boundary from any particular runtime.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
split two chunks	`["abcdz", false]`	`["a", true]`	Failed

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