FA-31620 / Keyboard interactions / Member archive

Keyboard macro deterministic playback scheduler: Stroke deadlines round upward rather than applying the contract floor · case 05

The event trace violates the deadline rounding rule and produces incorrect keyboard state or command output.

Member previewVariant 5 · 3 implementations · 9 checks per implementation

Case contract

Case [records,start,rate_num,rate_den,loops,gap]. Records [kind,key,offset] have ordered nonnegative integer offsets. Positive rational playback speed scales deadlines by floor(offset*den/num). Repeat cycles start after scaled final offset plus gap. End of each cycle synthesizes releases for remaining held keys in sorted order. Return emitted [kind,key,deadline] records. Loops nonnegative; gap positive. Inputs are finite ordered event traces; return the stated deterministic state. Batch entries are independent. N varies the number of independent input transactions.

Why this case matters

Controlled keyboard event processing model for debugging application event logic.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
macro-play scenario 2	`[[["down", "A", 10], ["up", "A", 12], ["down", "A", 15], ["up", "A", 17]], [["down", "A", 10], ["up", "A", 12], ["down", "A", 15], ["up", "A", 17]], [["down", "A", 10], ["up", "A", 12], ["down", "A", 15], ["up", "A", 17]], [["down", "A", 10], ["up", "A", 12], ["down", "A", 15], ["up", "A", 17]], [["down", "A", 10], ["up", "A", 12], ["down", "A", 15], ["up", "A", 17]]]`	`[[["down", "A", 10], ["up", "A", 11], ["down", "A", 15], ["up", "A", 16]], [["down", "A", 10], ["up", "A", 11], ["down", "A", 15], ["up", "A", 16]], [["down", "A", 10], ["up", "A", 11], ["down", "A", 15], ["up", "A", 16]], [["down", "A", 10], ["up", "A", 11], ["down", "A", 15], ["up", "A", 16]], [["down", "A", 10], ["up", "A", 11], ["down", "A", 15], ["up", "A", 16]]]`	Failed

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