The partial graph is the caller's self-contained view of the world — so
the time belongs in it. partialGraph.now becomes the evaluation clock for
that check (TTL gates, proof expiry, decay all honor it), with an
explicit options.now taking precedence. The explain rerun replays the
SAME partial graph object and reproduces the original decision; the
serializer records request.temporal.now for the record.
Pins: partialGraph.now driving a challenge decision both sides of the
window, the explicit-override precedence, and the explain rerun with the
same object.
John Dvorak
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