---
title: Cookbooks
description: Nineteen runnable recipes. Each one is a working agent that solves one real commerce problem end to end, with the refusals you will actually hit.
---
import { Callout } from "fumadocs-ui/components/callout";
Every cookbook is a **single runnable file**, not pseudo-code. Copy it, put your `csk_test_` key in the environment, and run it: a test key resolves to a sandbox project, so the whole flow completes without provider OAuth and without moving real money.
Each one also documents the order its handlers run in, what already exists when a refusal arrives, and which refusal a retry can fix. That is usually the part you need at 2am.
## Start here
## Your agent spends
The agent is the buyer. It moves money out of a wallet it governs, inside an allowance someone signed.
## Your agent collects
The agent is the merchant. It issues what someone else pays, then invoices and ships against it.
## Govern what it may do
The recipes that put a bound on an agent before it spends, and let you prove afterwards what it did.
## Run it in production
Patterns for operating agents, whichever side yours is on.
For output that never touches an upstream, declare per-session fixtures with `cs.create({ mocks: {...} })`. [Test Mode](/docs/concepts/test-mode) has the strict-mode contract and the envelope reference.
## Next steps