FA-98263 / Autoregressive target shifting / Member archive
End marker is omitted from next-token supervision · case 03
End marker is omitted from next-token supervision.
Case contract
Return [input,target] pairs for each token followed by eos; empty tokens yield no pair.
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 |
|---|---|---|---|
| last target eos | [[3, 4]] | [[3, 4], [4, 99]] | Failed |
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