The copy is not truth
Most systems operate off a copy. BLU asks the source again.
CRMs and CDPs copy the business into another system, and eventually everybody operates off the copy. When the source changes, you get multiple versions of reality and a quarterly argument about which one is right. BLU resolves status from the systems where the truth actually lives.
I did not want another version of reality.
PULL NOT STORE
Resolve, do not freeze
BLU pulls on read and stores almost nothing. The only stored numbers are scalar time-series for trendlines. Useful analytical data lands in BigQuery so resolution is quick. Who is churned right now is a question, not a list.
BETTER EVIDENCE
The answer improves without a fix
When a shipment arrives late or an identity resolves differently, no old report needs correcting. The next time the question gets asked, the answer is different. It works backward too. I can look at any prior day using everything we know now.
MEMORY
History is not status
BLU remembers what we believed, what we decided, what we did and what happened afterward. That history matters enormously. But memory and current truth are not the same thing. Reality is the source of status.