expenses/README.md

Expense Spend

Log expenses by category and see where your money goes — a real, buildable app you fork on hanzo.app and deploy live on Hanzo Cloud.

• UI — @hanzo/gui (the Hanzo design system) under Vite + React 19. 100% gui primitives, no Tailwind, no second kit — a clean fintech surface of tabular rows, category chips, and subtle charts.
• 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. Every expense is a real Base row, private to your org.

Three views, all real: an expense log (add + a tabular ledger) and a spend summary (KPI tiles, a by-category breakdown, and a by-month bar chart).

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-<app> client per app.

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 scopes every row to the caller's org (rule @request.auth.org_id = org) — a teammate in your org sees the row; other orgs cannot. At runtime src/views/log.tsx and src/views/summary.tsx read/write the expenses collection through @hanzo/base/react (useQuery/useMutation) carrying the IAM token. Keep schema.sql in lockstep with what the app reads.

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/expense.ts    domain — categories, money/date helpers, aggregation
  ui.tsx            the fintech kit — Panel, Chip, Bar, Action, Segmented
  auth/callback.tsx PKCE return leg
  views/            signed-out · home (shell + query) · log · summary
schema.sql          databaseSchema -> `expenses` Base collection on publish
hanzo.yml           Hanzo Cloud build/deploy manifest