FA-98257 / Autoregressive target shifting / Member archive
The first observed token is paired with itself after start insertion · case 02
The first observed token is paired with itself after start insertion.
Case contract
Given observations and bos, return adjacent pairs in [bos]+tokens, excluding any pair beyond the final observed target.
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 | [[2, 2], [4, 4]] | [[6, 2], [2, 4]] | Failed |
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