FA-18482 / Time representation / Member archive

Target displacement loses signed future-versus-past meaning · case 02

The decoded time state disagrees with the explicit regression oracle for until.

Member previewVariant 2 · 3 implementations · 11 checks per implementation

Case contract

Virtual clock has anchor A at monotonic M0, rate p0/q0 until switch S, then p1/q1 thereafter. Readings may precede M0 and use first rate. The switch is continuous. Report exact coordinate, active rate, continuity anchor, next target delta and inverse monotonic coordinate for a target at or after switch. All rates positive.

Why this case matters

Clock transfer and timestamp consumers require preserved coordinate, phase, validity and elapsed-time semantics.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`["185/2", "3/2", "115", "-75/2", "85/2"]`	`["185/2", "3/2", "115", "75/2", "85/2"]`	Failed

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

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