It reads before it writes.
Every turn starts from the same stack of context, resolved in the same order: your workspace’s brand kit, the project, this deck’s brief and instructions, the slides as they stand, whatever you have selected, and then the thing you just asked for. The layers only flow down. A deck can override the kit for itself; nothing an agent does to a slide reaches back up and changes the kit.
That order is why “make this match the others” works without you saying which others, and why it never quietly restyles a slide you weren’t looking at.
Top-down. Each layer can narrow the one above it for its own scope; none can change the one above.
It asks before it builds.
A sentence is enough to start. What comes back is not a deck — it is a question about the one thing the sentence didn’t say, with the likely answers as chips you can tap. When it has enough, it proposes an outline as a card: one row per slide, each with the point that slide makes. Cut the rows you don’t want. Nothing is generated until you open the editor.
One question per turn, with the answers it expects. You can always type instead.
Every change is a proposal.
In the editor the agent never touches the deck directly. It proposes a list of steps, each one an operation the editor already has — move this block, resize that one, set this heading, add a slide after the third. You see the result drawn on the slide as a preview, with a diff if you want it. Apply the steps you agree with, skip the rest. Each applied step is checked against the deck’s own rules before it lands, so a proposal can’t leave a block off the grid or a slide without a heading.
Because the vocabulary is the editor’s, there is nothing the agent can do that you couldn’t have done by hand — and nothing you can do by hand that you can’t ask it to do instead.
The proposal card. Steps land one at a time; the one in focus is drawn on the slide behind it.
Undo is one step. So is last Tuesday.
Every applied proposal is a single undo, however many steps it had. Before the agent dresses a deck it composed from an outline, the deck is versioned first, so the whole pass can be put back with one restore. And the brand kit is never on the table: “put this on every slide” copies the block to every slide, it doesn’t change what every future deck inherits.
What a turn costs.
Turns are metered in the credits your seat includes each month, and a turn is quoted before it runs — the same arithmetic the pricing page uses. A free workspace has 125 credits for its life, and no card. What a credit buys, on the pricing page.