A digital twin is the piece's own record. What it is, what it's made of, what's hidden inside, who built it and when, and what you did differently from the plan. It's written while you work, in your words, and it's yours.
Craft intelligence, written down.
There's the plan, which says what was intended. There's the piece, which is what got built. And there's the gap between them: every place the wood, the tools or the maker made a different call. The plan is on paper. The piece is in the room. The gap lives in one person's head, and heads forget.
That gap is where the craft is. It's the thing a plan can't carry, and it's the thing the next person needs most: the one who repairs the piece in thirty years, the one who inherits it, the one who wants to build another. A digital twin makes the invisible visible. It catches the gap at the moment it happens, at the bench, and keeps it with the piece.
Fast furniture is anonymous and unrepairable. A piece with a twin is neither.Hewn, The Digital Twin, 2026
On this site the twin is a section of your notebook called Your pieces. Adapt the Shaker Wall Shelf plan to your shop and the first line lands: who's building, where, for what climate. Mark a step done and it's a line, with the time it took. Log what you actually did and it's a line. Finish, and the finish is a line. Cross one out and it stays, struck and dated, so the record shows its own corrections.
Every line is yours: written by you or kept by you. Hewn adds nothing in its own voice to a piece's record, and never will.
On this device until you sign in; in your profile after. Download it, print the piece card, import it anywhere, or delete it. There's no code to scan and it transfers nothing.
The record is free. It will stay free. A certificate you can hand on with the piece may cost something later; the record itself never will.
Think of it as the piece's medical record: what it's made of, where it came from, who made it, and what's been done to it since. The first three are what the bench writes today. The fourth is what the record is for.
Species, sizes, joinery, finish, hardware: the piece as it actually is, not as the drawing hoped.
Written todayWho made it, where, when, for whom, and how long it took at the bench.
Written todayThe gap: every call made against the plan, logged at the step where it happened, in the maker's words.
Written todayRepair it, re-finish it, sell it with its story, pass it on. A photo and, later, a model of the piece belong here too.
NextA plan is re-engineered for your shop before you start. The twin is what comes back after: what the wood did, what the tools allowed, what the maker chose. Enough of those, offered freely and anonymously if you like, and the next plan starts wiser than the last. That's the whole idea. Build wiser.
A plan read by the system, with every joint and dimension understood, not just drawn.
On this siteThe plan re-engineered for your shop: your tools, your stock, your climate, your skill.
On this siteThe record written at the bench while you build, line by line, in your name.
On this site, since the Shaker Wall ShelfPieces offered to the Library of Human Making, so the next maker starts from what was actually built.
Next, with your consentLive for the Shaker Wall Shelf today; every plan on the site in turn.
The workbench already knows your tools and stock; that's how a plan gets re-engineered for your shop.
Who you are at the bench, what you've learned, and now what you've built. Yours, in your words.
You own the information and your build history. Hewn keeps a copy only while you're signed in, and only so your notebook follows you between devices. Nothing in it is offered to anyone until you tick the box that offers it, and you can offer it anonymously. The twin can leave Hewn whole, any day, as a file you can read.
The right to repair your own furniture comes from knowing how it was built in the first place.Hewn, The Digital Twin, 2026
Furniture built before Hewn, or without it, can have a twin too. You tell the piece's story in the same questions the bench would have asked. Photos aren't needed yet: what makes a record worth keeping is what a photo can't show, the joinery inside, the finish, the mistake and what you did about it. Only you know that.
What's true about a record today. It is as true as what you tell it: Hewn checks nothing and says so on the printed card. It lives on this device until you sign in, and signing in needs an invite code for now. It's free, and the record stays free; a certificate you can hand on with the piece is something we may charge for later. The record itself never will be.