The governing rule: every rule is extracted with a citation to its source page, validated by a person, versioned, and wired into the order-to-cash pipeline as an automated check, so compliance is enforced before a shipment goes out rather than remembered after.
The decision that made it trustworthy was provenance: the model returns the exact page and clause each rule came from, so Operations can verify it in seconds and so the rulebook stays auditable when a retailer updates the guide. On top of the structured rules sits a plain natural-language interface ("what is this retailer's ASN deadline and carton label spec?") so the team gets answers without paging through a PDF.
What we deliberately did not do: no blind trust in the extraction (every rule is human-approved before it can block a shipment), and no hard-coding. The rules are data, versioned as guides change.