When the source changes,
the answer should too.
Suppose a manufacturer says a battery fits your pump, then corrects that claim. The new answer should reach you without hiding what was said before.
Illustrative walkthrough using fictional products. In development.
COMPAT-1 · manufacturer specificationCompatibility recorded
The manufacturer lists this battery as compatible with your pump revision.
The answer belongs to this exact product revision. The source and its scope travel with it.
The local memory, permission and answer-consumer path has been exercised with synthetic data. A complete buying and payment flow is still being built.