Delta
A description of what changed between two versions of the same data.
What it means
A delta lists what was added, removed or changed, so a consumer reacts to the difference instead of re-reading everything.
How Onekey handles it
A monitor.changed event carries delta with added, removed and changed items, per-field from, to, delta and pct, and a summary count, plus the content_hash and previous_hash of the two runs. The data is the new result exactly as the endpoint served it, and is dropped above 64 KB while the delta stays.