Build around one job
A mini app should help someone complete a specific piece of work. It might reconcile a delivery, prepare a customer review, or collect proof from a visit. A narrow job keeps the interface clear and makes the result easy to verify.
Reuse business context
The small interface should not become another isolated tool. Supervisor supplies the same permissions, source records, and operating rules used elsewhere. A person sees only the fields needed for the task, while the business keeps one source of truth.
Keep the escape hatch
Internal tools meet unusual cases quickly. Let the operator inspect the source, add a note, or send the item for review. A mini app stays useful when it handles the common path well and makes the uncommon path visible instead of hiding it.