---
title: "Overview"
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";
## Find the shape of your problem
Each row is a kind of problem, not a kind of agent. Find the sentence that sounds like what you are building: every recipe sits in exactly one row, and the time beside it is the one the recipe declares.
{/* GERADO por scripts/cookbooks/gerar-indice.mjs — não editar à mão */}
{/* fim do bloco gerado */}
## How a recipe works
Each one 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.
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