A grid is a spreadsheet with a playbook wired into it
Open one and it looks like a spreadsheet, because that’s what it is. Columns run left to right in three groups. The input columns hold what the playbook needs, one set per row. The playbook column is the run itself. The output columns fill in with what came back. On a grid built from an FAQ playbook, that reads: article URL, number of FAQs, country, language and whether to use the Brand Kit, then the playbook, then the FAQs and the schema it generated.
The input columns. One set of values per row, and the row and column counts against the limits in the footer.

A row that has run shows View output. One that hasn't shows Run. The columns after it hold what came back.
Fill it by hand or import the list
Add rows one at a time with + Row, or use Import when the list already exists somewhere else. Most real work starts as a CSV from another tool, so import is usually the faster way in. Export takes the finished grid back out, outputs included. A grid holds up to 1,000 rows and 28 columns. Past that, split the work across more than one grid.Run one row before you run all of them
Run All starts every row that hasn’t run. Each row also has its own Run. Use the single-row run first, on real input, and read what comes back. A playbook that gets it right once is worth pointing at the other three hundred rows. One that doesn’t is a cheap thing to find out early, while the fix costs one row instead of four hundred.Review happens per row
Rows are reviewed one at a time rather than the grid being accepted in one go. The grids list counts Rows pending review and Rows completed separately, so a grid can be part done. That matters at volume. Approve a first batch, check the quality held, then work through the rest. A row that came back wrong doesn’t hold up the ones that came back right.
The grids list. Rows pending review is the column to watch.
What’s next
Build a playbook
Write the procedure a grid runs.
Approvals
See how review works elsewhere in Agents.