300 years is not deep time.

It is:

child → parent → grandparent → great-grandparent → living memory bridge

This HIR/OAM pressure-event ledger maps historical anchors and simulation-derived checkpoints across a 300-year human chain.

Not prophecy.
Not prediction.

A pressure map.

What happens when degradation compounds?
What changes when repair becomes operating code?

Sₜ = AₜBₜ − Pₜ