FA-9074 / Direct manipulation / Member archive

Gesture axis locking and cancellation: Axis choice depends on signed direction rather than magnitude · case 04

Axis choice depends on signed direction rather than magnitude.

Member previewVariant 4 · 3 implementations · 12 checks per implementation

Case contract

Cancelled gestures emit no movement; activate at the maximum absolute-axis threshold; choose dominant magnitude with horizontal tie; lock persists and suppresses cross-axis displacement.

Why this case matters

A deterministic model of gesture axis locking and cancellation; this isolates one interface invariant without requiring a browser.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
negative	`["y", 0, 0]`	`["x", -10, 0]`	Failed

MEMBER ARCHIVE

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

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