FA-98339 / Autoregressive target shifting / Member archive
A separator context incorrectly suppresses the following target · case 04
A separator context incorrectly suppresses the following target.
Case contract
Return adjacent pairs except when the target equals sep; a sep input can predict ordinary content.
Why this case matters
A small deterministic token-stream contract makes next-token alignment errors inspectable.
One recorded failure
Sample boundary fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| separator context valid | [[1, 9]] | [[9, 2]] | Failed |
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