Arbor
shared family tree · link-based, printable
The family tree the whole family keeps up to date, from a link.
A family tree the whole family keeps up to date together, made for a father who kept his in an old desktop program and reprinted it after every birth or separation. A shared link replaces the reprint: relatives fix the tree from their phones, every change can be undone, and the paper version prints with a QR code back to the live one.
- TypeScript
- React
- Cloudflare Workers
- Durable Objects
- SQLite
- Playwright
- Coverage
- 46%
- lines run by the genealogy core, the Worker and the screens, read 2026-10-08
- House packages
- 11 of 11
- installed from npm
At a glance
- One person creates the family and shares a link; every relative can then add people, fix a date, attach a photo or record a wedding from a phone. No account, no password, nothing to install.
- Real families, not a binary tree: successive unions and their end, adoption and step-parents, half-siblings, unknown parents and approximate dates such as “around 1880”.
- Every edit is an entry in the family’s change log, signed by whoever made it: any edit can be undone, deletions go to a bin, and the keeper can restore the tree as it stood at any moment.
- The tree prints as a vector PDF, on one sheet or tiled across several, with a QR code back to the live tree, so it is reprinted only when someone wants paper.
- “How are we related?” between any two people, named the way the family says it, in plain French: a second cousin, a great-uncle by marriage.
- Each family is its own Durable Object with its own SQLite: a family link only ever reaches its own data, and the whole thing runs on Cloudflare’s free plan.
House packages
11 of the 11 house packages, from npm, down to the compiler and linter settings.
- @adrienlcp/react-routerThe router provider every app takes.0.1.1
- @adrienlcp/i18nTranslates, and knows at compile time what each message asks for.0.3.0
- @adrienlcp/theme-preferenceKeeps the chosen theme from flashing, down to the phone’s toolbar.0.3.0
- @adrienlcp/browserCopies to the clipboard even over plain HTTP, where the Clipboard API does not exist.0.1.1
- @adrienlcp/reactThe context helpers every React app starts from.0.3.0
- @adrienlcp/react-ariaThe focus ring and class composition over react-aria-components.0.1.0
- @adrienlcp/stylesThe reset and shared styles every project starts from.0.5.0
- @adrienlcp/resultSays whether something worked, without throwing and without null.0.1.0
- @adrienlcp/safe-storageTakes the throw out of localStorage and returns a Result instead.0.1.0
- @adrienlcp/tsconfigThe compiler settings every project extends.0.1.0
- @adrienlcp/biome-configThe linter and formatter settings every project extends.0.1.0