booking/README.md

Cadence — Timeslot Booking

A calm way to publish the windows you are free and let clients claim one. A real, buildable app on the Hanzo stack — fork it on hanzo.app and deploy live on Hanzo Cloud.

• UI — @hanzo/gui (the Hanzo design system) under Vite + React 19. A light, single-accent scheduler; no Tailwind, no second kit.
• Auth — @hanzo/iam, OAuth2 PKCE against hanzo.id. No local passwords — IAM owns every credential interaction.
• Data — @hanzo/base, the IAM-native, org-scoped data plane. Slots and bookings are real Base collections.

Three views cover the whole loop:

• Book — open slots laid out as a calm agenda, one day per row. Pick a slot, add your name/email/note, confirm.
• Bookings — every reservation joined to its time, with cancel.
• Availability — publish slots, open/close them, remove the ones you don't want offered.

"Booked" is derived from the bookings collection (a booking pointing at a slot id), never stored twice — so every action is a single write and the two collections can't drift.

Stack (pinned)

Package	Version
react / react-dom	^19.2.4
@hanzo/gui + @hanzogui/config	7.3.0
@hanzo/iam	^0.13.1
@hanzo/base	^0.2.1
vite	^6 (@vitejs/plugin-react)
typescript	5.9.3

Run it

npm install
npm run dev        # http://localhost:5173
npm run build      # tsc --noEmit && vite build  ->  dist/
npm run preview    # serve the production build (SPA fallback on)

Out of the box it runs against live Hanzo (hanzo.id + api.hanzo.ai) — no config needed to see the sign-in flow. Copy .env.example to .env to point at a different environment.

Environment contract

Only VITE_-prefixed vars reach the browser (this is a static SPA — there is no server). Defaults in parentheses.

Var	Purpose
VITE_HANZO_IAM_URL (https://hanzo.id)	OIDC issuer.
VITE_HANZO_CLIENT_ID (hanzo-app)	IAM application (<org>-<app>). Its redirect-URI list must allow this deploy's /auth/callback — see Ambient IAM.
VITE_HANZO_REDIRECT_URI (${origin}/auth/callback)	PKCE redirect.
VITE_HANZO_BASE_URL (https://api.hanzo.ai)	Browser-reachable Hanzo Base data plane. Deploy injects the provisioned URL.
VITE_HANZO_API_URL / VITE_HANZO_API_KEY	Optional — only if the app calls the Hanzo LLM gateway. Unused here; never commit a real key.

How auth works — ambient IAM

login() starts an OAuth2 PKCE S256 redirect to hanzo.id; hanzo.id returns to /auth/callback, where handleCallback() exchanges the code for tokens (stored in localStorage, refresh-aware via offline_access). Every deployed app is a static site at <slug>.hanzo.app; there is no server token — the SPA authenticates the user in the browser and carries the resulting IAM JWT to Base. "Ambient" means the app just reads the signed-in user via that token.

The one deploy requirement: the IAM client (VITE_HANZO_CLIENT_ID) must list this origin's /auth/callback as an allowed redirect URI. Register a https://*.hanzo.app/auth/callback wildcard on the shared client so every forked app works, or register a dedicated hanzo-booking-timeslot client.

How data works — Base from schema.sql

schema.sql is the app's databaseSchema (SQL DDL). On publish, Hanzo Cloud translates each CREATE TABLE into a Hanzo Base collection (provisionBaseFromDDL, additive + idempotent). Base manages id/created/updated/owner/org, stamps owner+org from the verified IAM principal, and applies the rule @request.auth.org_id = org so a teammate in your org sees the row and other orgs cannot. Two collections:

• slots (start, end, open) — a publishable window; open is your toggle.
• bookings (slot, name, email, note) — a reservation tied to a slot id.

At runtime the three views read/write these through @hanzo/base/react (useQuery/useMutation) carrying the IAM token. Keep schema.sql in lockstep with what the app reads/writes.

Deploy — Hanzo Cloud

hanzo.yml declares a static build (npm run build → dist/, served at <slug>.hanzo.app) plus the Base schema to provision and the env to inject. Do not build a container image locally — Hanzo Cloud owns builds and deploys. CI here only proves the template compiles green.

Layout

src/
  main.tsx          entry
  providers.tsx     GuiProvider -> IamProvider -> BaseProvider(client=IAM-token)
  app.tsx           route (/auth/callback) + auth gate
  gui.config.ts     createGui(defaultConfig from @hanzogui/config/v5)
  iam.config.ts     IAM PKCE config
  env.ts            the VITE_ env contract, one place
  lib/base.ts       BaseClient carrying the IAM bearer token
  lib/booking.ts    Slot/Booking types + the single-accent palette + time helpers
  auth/callback.tsx PKCE return leg
  views/
    brand.tsx       the Cadence mark
    signed-out.tsx  calm landing (PKCE sign-in)
    home.tsx        shell: brand bar + Book / Bookings / Availability tabs
    book.tsx        the booking page (slot grid + booking form)
    bookings.tsx    reservations, with cancel
    availability.tsx publish / open-close / remove slots
    ui.tsx          shared Field + Primary / Ghost / Pill buttons
schema.sql          databaseSchema -> Base collections on publish
hanzo.yml           Hanzo Cloud build/deploy manifest