Module speculation 

Runtime-side paired speculation races for megakernel dispatch.

The driver crate owns the backend-neutral decision math. This module owns the megakernel/runtime bridge: every candidate rewrite is measured as a conservative/speculative pair, the faster side is recorded in the shared autotune store, and the accumulated sample window is converted into the N2 adoption verdict.

Structs

PairedSpeculationSample

One measured conservative/speculative dispatch pair.

PairedSpeculationUpdate

Result of recording one paired race.

PairedSpeculationWindow

Accumulated paired-race window for one rewrite candidate and shape.