FA-100803 / Model output stopping rules / Member archive

Output stopping: A stop token in the prompt prematurely ends generated output · case 03

A stop token in the prompt prematurely ends generated output.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Inspect only generated IDs for stop membership; prompt IDs never terminate generated output. Return the generated prefix before the first stop and a bool.

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
prompt stop ignored	`[[], true]`	`[[1, 2], false]`	Failed

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