scaffold: schema, compose, contract

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drjones
2026-08-25 20:02:23 -07:00
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CONTRACT.md Normal file
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# Polaris — Reseller Platform · Module Contract (agents read this)
Single source of truth for the 3 parallel build agents. Do NOT drift from these
interfaces — the other agents depend on them exactly as written.
## Stack (locked)
- Backend: **FastAPI** (Python 3.12) in `/backend`, SQLAlchemy 2.0 ORM, Pydantic v2
- DB: **PostgreSQL 16** (schema in `db/schema.sql` — DO NOT modify it, build against it)
- Queue: **Celery** + **Redis** (`redis://redis:6379/0`)
- Frontend: **React 18 + Vite + TypeScript + Tailwind** in `/frontend`
- Deploy: Docker Compose (root `docker-compose.yml` already has postgres+redis)
## Service URLs (inside Docker network)
- postgres: `postgres://reseller:${POSTGRES_PASSWORD}@postgres:5432/reseller`
- redis: `redis://redis:6379/0`
- api listens on `0.0.0.0:8000`
## BACKEND agent owns: /backend
- `app/main.py` — FastAPI app, CORS allow-all (MVP), mounts routers under `/api`
- `app/models.py` — SQLAlchemy models mirroring `db/schema.sql` EXACTLY (table + column names)
- `app/database.py` — engine from `DATABASE_URL` env, `SessionLocal`, `Base`
- `app/schemas.py` — Pydantic v2 request/response models
- `app/engines/pricing.py` — `calculate_price(cost, shipping, fees)` -> returns retail,
margin, profit using active `price_rules`; `estimate_net_profit(...)`; never below min_price
- `app/engines/suppliers/base.py` — `SupplierAdapter` ABC:
get_products / get_inventory / get_price / create_order / get_order_status / get_tracking / cancel_order
- `app/engines/suppliers/csv_adapter.py` — CSV feed adapter (reads supplier CSV: sku,title,cost,inventory,shipping_cost,shipping_time,category,image_url)
- `app/engines/suppliers/sample.py` — sample supplier seeded with ~25 realistic products ($50-$500, home/gadgets/office niche)
- `app/engines/importer.py` — import feed -> normalize -> validate -> upsert products/supplier_products; never auto-publish invalid
- `app/engines/order_router.py` — `select_supplier(product_id, qty)` highest-score eligible supplier; `route_order(order)`
- `app/engines/scoring.py` — supplier score = 40% price + 20% inventory + 15% speed + 10% fulfillment + 10% returns + 5% history
- `app/engines/inventory.py` — sync supplier_products inventory, mark 0/unavailable, alert flags
- `app/tasks.py` — Celery: sync_inventory (every 5min), sync_tracking, recalc_prices
- `app/routers/` — products.py, suppliers.py, orders.py, customers.py, admin.py, analytics.py, health.py
- `alembic/` — optional; MVP may `Base.metadata.create_all()` instead (schema.sql is canonical)
## API endpoints (frontend depends on these — do not rename)
- `GET /api/health` -> {status, version}
- `GET /api/products` (filters: ?status=&category=&search=&limit=&offset=)
- `GET /api/products/{id}`
- `POST /api/products/{id}/publish`
- `POST /api/products/{id}/pause`
- `GET /api/products/{id}/price-history`
- `POST /api/products/import` (body: {supplier_id, feed_type, data_or_url})
- `GET /api/suppliers` / `POST /api/suppliers`
- `GET /api/suppliers/{id}/performance`
- `POST /api/orders` (body: {customer_email, items:[{product_id,qty}]}) -> creates+routes order
- `GET /api/orders` / `GET /api/orders/{id}`
- `POST /api/orders/{id}/tracking` (simulate supplier tracking push)
- `GET /api/analytics/summary` -> today revenue/orders/profit/margin/aov/conversion
- `GET /api/analytics/top-products`
- `GET /api/analytics/supplier-performance`
- `POST /api/auth/login` (admin, simple: env ADMIN_EMAIL/ADMIN_PASSWORD_HASH, returns JWT)
- `POST /api/auth/register` (customer)
## FRONTEND agent owns: /frontend
React+Vite+TS+Tailwind. Two surfaces, shared API client (`src/lib/api.ts`):
- `/` storefront: home, shop grid, category filter, product page, cart, checkout (mock
Stripe/BTCPay button -> creates order), order-tracking page. ORIGINAL brand "Polaris".
Dark premium aesthetic. BMAC footer link https://buymeacoffee.com/r26xrthzttg
- `/admin` dashboard: today KPI cards (revenue/orders/gross+net profit/margin/aov/refunds),
top products table, supplier performance table, import button, product lifecycle view,
order list with status + tracking. Cache-Control no-store on all API fetches.
- Env: `VITE_API_URL=/api` (nginx proxies).
## OPS agent owns: root deploy + docs
- Extend `docker-compose.yml` with: api, worker, frontend, nginx services
- `backend/Dockerfile`, `frontend/Dockerfile`, `nginx/nginx.conf` (proxy /api->api:8000, /->frontend)
- `.env.example` (POSTGRES_PASSWORD, DATABASE_URL, REDIS_URL, SECRET_KEY, ADMIN_EMAIL, ADMIN_PASSWORD, BTCPAY_URL/KEY, STRIPE_KEY)
- `README.md` (deploy steps), `docs/api.md` (endpoint reference), `tests/` (pytest smoke tests)
- systemd unit `polaris.service` wrapping `docker compose up -d`, enabled+started
## Verification (the parent re-runs these — every agent must self-verify first)
1. `docker compose up -d` clean, all containers healthy
2. seed sample supplier + import -> products appear in GET /api/products
3. pricing returns sensible margin for a $80 cost item
4. POST /api/orders creates order, routes to supplier, records profit
5. frontend `/` and `/admin` render with live API data
6. README deploy steps reproducible from scratch
## Rules
- Secrets ONLY via env vars, never hard-coded.
- Backup any existing file before overwriting (cp x x.bak-<date>).
- Never delete the parent's work; only add/extend.
- All code self-contained; report exact files changed + live curl proof.

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-- Polaris — canonical PostgreSQL schema (single source of truth)
-- Database: reseller User: reseller
CREATE EXTENSION IF NOT EXISTS "pgcrypto";
-- ── SUPPLIERS ──────────────────────────────────────────────
CREATE TABLE suppliers (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
name TEXT NOT NULL,
adapter_type TEXT NOT NULL, -- csv|xml|json|api|affiliate
api_endpoint TEXT,
account_id TEXT,
credentials_enc TEXT, -- encrypted secret ref (never raw)
fulfillment_caps JSONB DEFAULT '[]',
shipping_regions JSONB DEFAULT '[]',
reliability_score NUMERIC(5,2) DEFAULT 50.0,
status TEXT NOT NULL DEFAULT 'active', -- active|paused|failed
created_at TIMESTAMPTZ DEFAULT now(),
updated_at TIMESTAMPTZ DEFAULT now()
);
-- ── PRODUCTS ───────────────────────────────────────────────
CREATE TABLE products (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
sku TEXT UNIQUE NOT NULL,
title TEXT NOT NULL,
description TEXT,
category TEXT,
brand TEXT,
manufacturer TEXT,
upc_ean_gtin TEXT,
images JSONB DEFAULT '[]',
dimensions JSONB, -- {length,width,height,unit}
weight_grams NUMERIC(10,2),
cost NUMERIC(12,2) NOT NULL DEFAULT 0,
retail_price NUMERIC(12,2),
min_price NUMERIC(12,2),
max_price NUMERIC(12,2),
status TEXT NOT NULL DEFAULT 'discovered', -- discovered|analyzing|approved|imported|content_generated|price_calculated|quality_check|published|monitored|paused|sold
lifecycle JSONB DEFAULT '{}', -- opportunity score etc
created_at TIMESTAMPTZ DEFAULT now(),
updated_at TIMESTAMPTZ DEFAULT now()
);
-- ── SUPPLIER_PRODUCTS ──────────────────────────────────────
CREATE TABLE supplier_products (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
supplier_id UUID NOT NULL REFERENCES suppliers(id) ON DELETE CASCADE,
supplier_sku TEXT NOT NULL,
product_id UUID REFERENCES products(id) ON DELETE SET NULL,
supplier_cost NUMERIC(12,2) NOT NULL DEFAULT 0,
supplier_inventory INTEGER NOT NULL DEFAULT 0,
shipping_cost NUMERIC(12,2) DEFAULT 0,
shipping_time TEXT, -- e.g. '3-5 days'
last_updated TIMESTAMPTZ DEFAULT now(),
UNIQUE (supplier_id, supplier_sku)
);
-- ── CUSTOMERS ──────────────────────────────────────────────
CREATE TABLE customers (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
email TEXT UNIQUE NOT NULL,
name TEXT,
shipping_addr JSONB,
created_at TIMESTAMPTZ DEFAULT now()
);
-- ── ORDERS ─────────────────────────────────────────────────
CREATE TABLE orders (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
order_number TEXT UNIQUE NOT NULL,
customer_id UUID REFERENCES customers(id),
items JSONB NOT NULL, -- [{product_id,qty,unit_price}]
retail_total NUMERIC(12,2) NOT NULL DEFAULT 0,
supplier_id UUID REFERENCES suppliers(id),
supplier_cost NUMERIC(12,2) DEFAULT 0,
shipping_cost NUMERIC(12,2) DEFAULT 0,
fees NUMERIC(12,2) DEFAULT 0,
profit NUMERIC(12,2) DEFAULT 0,
status TEXT NOT NULL DEFAULT 'new', -- new|paid|fraud_check|supplier_order|confirmed|shipped|delivered|cancelled|refunded
tracking TEXT,
carrier TEXT,
created_at TIMESTAMPTZ DEFAULT now(),
updated_at TIMESTAMPTZ DEFAULT now()
);
-- ── PRICE HISTORY ──────────────────────────────────────────
CREATE TABLE price_history (
id BIGSERIAL PRIMARY KEY,
product_id UUID NOT NULL REFERENCES products(id) ON DELETE CASCADE,
price NUMERIC(12,2) NOT NULL,
reason TEXT, -- manual|auto|competitor|cost_change
created_at TIMESTAMPTZ DEFAULT now()
);
-- ── INVENTORY HISTORY ──────────────────────────────────────
CREATE TABLE inventory_history (
id BIGSERIAL PRIMARY KEY,
supplier_product_id UUID NOT NULL REFERENCES supplier_products(id) ON DELETE CASCADE,
inventory INTEGER NOT NULL,
created_at TIMESTAMPTZ DEFAULT now()
);
-- ── SUPPLIER PERFORMANCE ───────────────────────────────────
CREATE TABLE supplier_performance (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
supplier_id UUID NOT NULL REFERENCES suppliers(id) ON DELETE CASCADE,
fulfillment_rate NUMERIC(5,2) DEFAULT 100,
avg_shipping_days NUMERIC(6,2),
cancellation_rate NUMERIC(5,2) DEFAULT 0,
stock_accuracy NUMERIC(5,2) DEFAULT 100,
return_rate NUMERIC(5,2) DEFAULT 0,
updated_at TIMESTAMPTZ DEFAULT now()
);
-- ── PRICE RULES ────────────────────────────────────────────
CREATE TABLE price_rules (
id SERIAL PRIMARY KEY,
min_cost NUMERIC(12,2) NOT NULL DEFAULT 0,
max_cost NUMERIC(12,2), -- null = no upper bound
markup_pct NUMERIC(6,2) NOT NULL,
min_margin_pct NUMERIC(6,2) DEFAULT 0,
active BOOLEAN DEFAULT true,
created_at TIMESTAMPTZ DEFAULT now()
);
-- ── AUDIT LOG ──────────────────────────────────────────────
CREATE TABLE audit_logs (
id BIGSERIAL PRIMARY KEY,
actor TEXT,
action TEXT NOT NULL,
entity TEXT,
entity_id TEXT,
detail JSONB,
created_at TIMESTAMPTZ DEFAULT now()
);
-- seed default price rules (cost -> markup)
INSERT INTO price_rules (min_cost, max_cost, markup_pct) VALUES
(0, 25, 50.00),
(25, 100, 35.00),
(100, 500, 25.00),
(500, NULL, 15.00);
CREATE INDEX idx_supplier_products_product ON supplier_products(product_id);
CREATE INDEX idx_orders_status ON orders(status);
CREATE INDEX idx_products_status ON products(status);
CREATE INDEX idx_price_history_product ON price_history(product_id);

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services:
postgres:
image: postgres:16-alpine
environment:
POSTGRES_USER: reseller
POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
POSTGRES_DB: reseller
volumes:
- pgdata:/var/lib/postgresql/data
- ./db/schema.sql:/docker-entrypoint-initdb.d/01-schema.sql:ro
ports:
- "5432:5432"
healthcheck:
test: ["CMD-SHELL", "pg_isready -U reseller"]
interval: 5s
timeout: 3s
retries: 10
redis:
image: redis:7-alpine
ports:
- "6379:6379"
healthcheck:
test: ["CMD", "redis-cli", "ping"]
interval: 5s
timeout: 3s
retries: 10
volumes:
pgdata: