temetro/CLAUDE.md

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Project

temetro — an open-source clinical tool that acts as an AI middleman between clinicians and patient data. Clinicians use a natural-language AI chat to retrieve and organize patient information, displayed as rich record cards.

The distinguishing idea is a patient-owned data model. Instead of (or alongside) living in a doctor's own database, a patient's record can be stored on the patient's own device. When a clinician adds or changes data, they sign it (blockchain-style); the change is written to the patient's record and cannot be modified until the patient approves it through a companion app. temetro can also read existing patient databases and present them in the same organized card UI.

This repository is a monorepo: the frontend/ and backend/ apps live side by side in one git repository (published as temetro).

Status: the backend is built. backend/ is a TypeScript + Express + Postgres API (Drizzle ORM) with authentication and multi-tenant clinics via Better Auth, plus an org-scoped patient records API. The frontend/ chat is wired to it: real auth (login/signup/reset/onboarding), route protection, clinic switching, and patient data fetched over the API — the old in-memory fixture is gone (frontend/lib/patients.ts now calls the backend).

Now built (thin slice): a patient wallet app (~/Desktop/temetro-app, sibling repo — see "Patient wallet app" below) and an end-to-end encrypted share / patient-approval flow: clinics hold a real Ed25519 signing key (Settings → Signing, backend/src/services/signing.ts), and "Import from a patient app" on the Patients page relays an encrypted request to the wallet over a /wallet Socket.io namespace, the patient approves on their phone, and the sealed record is imported (with optional temporary share + auto-delete). See backend/src/routes/{signing,patients-wallet}.ts.

Still vision, not built: clinic→wallet push of signed record updates, in-app record editing, QR pairing, and cryptographic time-boxing of temporary shares. The AI chat is still mock replies. Email verification is wired but currently not enforced at sign-in (see backend/CLAUDE.md).

Patient wallet app (sibling repo ~/Desktop/temetro-app)

The patient companion app is its own git repo on the Desktop (not in this monorepo): an Expo SDK 56 app whose UI must be built with HeroUI Native (heroui-native + Uniwind/Tailwind) — a hard requirement; the one exception is the native tab bar, which uses expo-router NativeTabs. See its CLAUDE.md. It stores the patient's record encrypted on-device, the patient's identity is an Ed25519 keypair whose public key (base58check, tmw_…) is their wallet number, and it shares records by sealing them to a clinic's ephemeral key over the backend relay. The crypto wire format mirrors backend/src/lib/wallet-crypto.ts exactly. "Decentralization" here means keys + data live on the patient's device and the relay only ever forwards ciphertext — it is not a literal blockchain (records are off-chain, which is also what lets a temporary share be deleted). Commit/push that app inside its own repo, separately from this one.

Layout

frontend/ and backend/ were previously separate per-folder git repos; they have been merged into this single monorepo with full history of both preserved.

The marketing landing page is not in this monorepo — it lives in the sibling Desktop folder ../temetro/landing-page (/Users/khalidabdi/Desktop/temetro/landing-page), right next to the ../temetro/docs site. It is its own git repository (a Next.js app with the marketing components/landing/); edit and commit it there, separately from this repo.

• frontend/ — the Next.js product app (the AI chat UI). This is where almost all current work happens. It has its own CLAUDE.md — read frontend/CLAUDE.md for the stack, commands, architecture, and gotchas.
• backend/ — the TypeScript + Express + Postgres API (Drizzle ORM + Better Auth). Built and Dockerised. Has its own CLAUDE.md (and README.md) — read it for the auth/schema workflow and gotchas.

frontend/ and backend/ are independent apps, each with its own package.json / node_modules. Run npm commands from inside the relevant app directory, not from this root.

Documentation (very important)

The project documentation lives outside this repo, in the sibling Desktop folder ../temetro/docs (/Users/khalidabdi/Desktop/temetro/docs) — a Fumadocs (Next.js) site with user guides (content/docs/guides/), an API reference (content/docs/api/), admin docs, and a roadmap (content/docs/roadmap.mdx). It is its own git repository.

Whenever you make a significant change here — a new feature, endpoint, page, or behavior change — update the affected docs pages in the same work session so the documentation stays accurate (e.g. a new backend route needs an content/docs/api/*.mdx entry; a UI feature belongs in the matching guide; status changes belong in the roadmap). Commit docs changes inside that repo, separately from this one.

Running the stack

From backend/: ensure a .env exists (cp .env.example .env, then set BETTER_AUTH_SECRET via openssl rand -base64 32), then docker compose up --build → frontend :3000, backend :4000, Postgres. Compose builds the sibling ../frontend app, which works because they remain siblings in the monorepo. See backend/README.md.

Port note: if another Postgres already holds host port 5432, set POSTGRES_PORT (e.g. 5433) in backend/.env — the app still talks to Postgres internally on db:5432; only the published host port changes.

For local dev without Docker, run npm run dev in backend/ and frontend/ separately (the frontend reads NEXT_PUBLIC_API_URL, default http://localhost:4000).

Version control (single monorepo)

This root is one git repository (temetro). The old per-folder .git repos are gone — frontend/ and backend/ are plain subdirectories now.

Commit after every change. When you finish a task, commit from the repo root (git add -A && git commit). Keep each commit focused on one logical change, and prefix the subject with the area when useful (e.g. frontend: / backend:). End commit messages with the Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> trailer.

.env files are git-ignored (only .env.example is tracked) — never commit real secrets.

Customized Next.js (frontend)

The frontend/ app runs a customized Next.js 16 whose APIs/conventions differ from public docs. Before writing Next.js code, read the relevant guide under frontend/node_modules/next/dist/docs/01-app/.

Root tooling

• .mcp.json registers the shadcn MCP server, and the root package.json pins the shadcn CLI — used to browse/add registry components into the apps. There is nothing to build or run at this root level.