The commit described.
The cells downstream of the written ones, or null when nothing reads them.
Errors now in the written and dependent cells, by region.
Written cells that held an error before the commit and hold none now.
Error regions past RunDelta.errors.
One entry per sheet whose cells the commit changed.
What is not a cell, over the written or dependent cells.
What one commit did to a workbook, at region altitude: the structured half of the run delta.
Remarks
JSON-safe, so a host can send it as it is; renderDelta is its markdown. Every address is sheet-qualified and every list is capped, with the uncounted rest in a
morefield.