The wall every digital twin hits, the way past it, and what the next eighteen months have to prove.
Re-tuning is easy. Certifying it is not. That is the blocker — and the business.
A model is re-fitted by engineers and shipped as a new version. That cadence cannot follow a patient.
An engineer could build an agent that re-tunes a model this afternoon.
What they cannot do is hand a regulator a file that says why it is safe. No existing regime covers a hybrid model re-tuned at runtime.
The moat is not the anatomy. It is the paperwork nobody else wants to write.
An agent's authority over a model — graded A0 to A4 — sizes the evidence required, alongside model risk. Raise the authority, raise the burden.
A constant without primary-source provenance does not degrade gracefully. It refuses to run, and is hidden from the model picker.
Provenance is generated as the agent acts inside the envelope — continuously, rather than once at design time.
Every gate is a number someone else can check.
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