FA-98243 / Autoregressive target shifting / Member archive
The final input token has no next-token target · case 03
The final input token has no next-token target.
Case contract
For a token stream, return adjacent [input,target] pairs; streams shorter than two yield an empty list.
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 |
|---|---|---|---|
| ordinary | [[3, 3], [4, 4], [5, 5]] | [[3, 4], [4, 5]] | Failed |
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