FA-98329 / Autoregressive target shifting / Member archive
A segment start loses its first valid target pair · case 04
A segment start loses its first valid target pair.
Case contract
For each [start,end) segment, include i=start..end-2 when both tokens exist.
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 pair retained | [[2, 3]] | [[1, 2], [2, 3]] | Failed |
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