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Serial distance is forward modular distance · case 02

Serial distance is forward modular distance.

Member previewVariant 2 · 3 implementations · 4 checks per implementation

Case contract

Bounded offline decision model: serial distance is forward modular distance. Inputs are already validated protocol fields; the explicit fixtures define the supported policy, not a complete protocol implementation.

Why this case matters

This deterministic transport flow control model isolates the serial-distance-is-forward-modular-distance policy at a network component boundary.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`-247`	`9`	Failed

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