What the regulation actually asks for
The EU AI Act is often discussed as an abstract compliance burden, but for teams running AI workflows the practical requirements are concrete. High-risk systems must keep records that let a human reconstruct what the system did and why. That is not a vague aspiration — Article 12 requires automatic logging of events over the lifetime of the system, and Article 14 requires that a person can meaningfully oversee and intervene. If your workflow cannot produce that record on demand, you do not have a compliance gap you can paper over later; you have a design gap.
Article 12: logging is not optional
Automatic event logging means the system records the inputs it received, the decisions it made, the model versions involved, and the outcome — continuously, without an engineer remembering to turn it on. The logs have to be traceable and tamper-evident enough that an auditor trusts them. In practice this pushes teams toward append-only storage: you write events once, you never edit them, and each entry is hash-linked to the previous one so any later tampering is detectable. A regular application log rotated after seven days does not meet this bar.
Article 14: human oversight you can prove
Human oversight is only real if a person could have understood the situation and acted. That means the workflow must surface, at the moment of a consequential decision, enough context for a reviewer to approve, reject, or escalate — and it must record what they decided. A policy gate that pauses an automation for sign-off, and logs the identity and reasoning of the approver, is the difference between claiming oversight and evidencing it.
What this means for your architecture
The through-line is evidence. Every requirement — logging, traceability, oversight, post-incident analysis — assumes you can answer "what happened, exactly?" months after the fact. Systems that treat their execution history as disposable will struggle. Systems built on an append-only, hash-linked event log answer these questions almost for free, because the record already exists and cannot be quietly rewritten.
Starting without boiling the ocean
You do not need to solve the entire Act on day one. Start by identifying which workflows touch high-risk decisions, make their event logs append-only and hash-linked, and put a human approval gate on the irreversible steps. That gives you the spine of an audit trail. Everything else — documentation, risk assessments, conformity work — attaches to that spine far more easily than it attaches to a system that never recorded what it did.