WHY CLOCK DOMAINS
A number is not a meaningful time coordinate without its clock context.
Clock domain
Identifies the origin, timescale, clock kind and reboot/session context.
TimeAtom
Measured coordinate including seconds, subsecond precision, timescale and uncertainty.
AnchorRef64
Opaque handle that resolves to richer temporal evidence instead of pretending 64 bits contain the whole timestamp.
Temporal barcode
Event-time envelope binding time, channel, runtime loop, domain and event kind.
OWNERSHIP
Chronograf measures time; it does not own memory.
In the candidate model, Robot Chronograf owns measurement and anchors. RGD Physics owns Chronon semantics. The embodied runtime owns memory projection and recall. This prevents timestamp infrastructure from becoming an accidental memory system.