Field notes
Why we built replay before we built sharing.
The first feature wasn't a document type. It wasn't an editor. It wasn't even a save button. It was the trail behind your cursor.
Mira EstebanApr 14, 2026
Field notes from the team building a writing tool with a memory. Some opinions, some craft, some quiet thinking.
The first feature wasn't a document type. It wasn't an editor. It wasn't even a save button. It was the trail behind your cursor.
A comment on a paragraph is not metadata. It's a thought adjacent to another thought — and it deserves the same affordances as the writing itself.
We almost shipped a 'share as image' button. We're glad we didn't. Here's the case for a link that shows process, not product.
Tools are spaces. The room you write in shapes what you write. We talk about the room we're trying to build.
Six people, two years, one writing tool. A short letter on why we're not in a hurry.
How we model every keystroke as a checkpoint without melting your Firestore bill.
Most product manifestos are about what you ship. Ours is about what we refuse to. A short, opinionated list.