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Causal position does not reset at segment boundaries · case 02

Causal position does not reset at segment boundaries.

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

Each entry is [segment_id, local_position]; visible iff IDs match and key local position<=query local position.

Why this case matters

A small explicit visibility matrix makes sequence-attention boundary behavior reviewable.

One recorded failure

Sample boundary fixture

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

Boundary fixtureActualExpectedOutcome
reset and isolate[[true, false, false, false], [true, true, false, false], [true, true, true, false], [true, true, true, true]][[true, false, false, false], [true, true, false, false], [false, false, true, false], [false, false, true, true]]Failed

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

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