Sync and Conflict Resolution

A conflict occurs when changes cannot safely be accepted under the agreed concurrency rules. Detecting a conflict and deciding its outcome are different tasks.

Choose the resolution policy from the meaning of the data. A theme setting, a note body, and an inventory reservation should not automatically use the same rule.

Detect competing changes with a version check

Suppose a phone and laptop both read note revision 4. The laptop's edit is accepted as revision 5. The phone later submits its own edit based on revision 4.