Personalize your UI for each user — automatically and privately

@epode/cambia-runtime makes your app's interface adapt to each person who uses it. It starts every user with a sensible default, then quietly tailors the parts you allow — like table density or default sort — based on the choices they actually make. The parts you mark as fixed never change, so the app always feels familiar.

Everything happens on the user's device. No accounts, no tracking, nothing sent to a server.

npm i @epode/cambia-runtime

Quick start

import { createCambia, createLocalStorageStore } from '@epode/cambia-runtime'

const cambia = createCambia({
  designMd,                          // your DESIGN.md (describes your design system)
  userId: 'alice',                   // keeps each user's preferences separate
  store: createLocalStorageStore(),  // saves in the browser; optional
})

const table = cambia.role('tabular-list')

table.values()                                    // the settings to render with, tailored to this user
table.observe({ trait: 'density', value: 'comfortable' })  // tell it what the user chose
// After a clear, repeated pattern, the table adapts for this user only.

cambia.forget()                                   // erase this user's preferences (e.g. for GDPR)

Why teams use it

• Better UX with zero effort from users — the interface fits each person over time.
• Privacy-friendly — preferences stay on the device; there's nothing to track or breach, and forget() deletes a user's data in one call.
• Safe to adopt — only the parts you opt in can change; your core layout stays put.
• Tiny and framework-agnostic — plain functions; use it anywhere. For React, add @epode/cambia-react.

Part of Cambia. Free and open source (MIT).