FA-98309 / Autoregressive target shifting / Member archive

Target gather uses the context position instead of its successor · case 04

Target gather uses the context position instead of its successor.

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

Contexts are [absolute_position,input_token] rows and targets maps absolute positions to tokens. Return [input,target_at_position_plus_one] for each context row.

Why this case matters

A small deterministic token-stream contract makes next-token alignment errors inspectable.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
shifted lookup	`[[10, 90], [11, 12]]`	`[[10, 12], [11, 13]]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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