FA-98255 / Autoregressive target shifting / Member archive
Start marker context is copied as its own target · case 05
Start marker context is copied as its own target.
Case contract
For observed tokens and bos, return [context,target] pairs beginning [bos, first token]; empty observations produce no pairs.
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 |
|---|---|---|---|
| first target | [[0, 0], [5, 5]] | [[0, 5], [5, 6]] | Failed |
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