step-functions

1# AWS Step Functions
2 
3AWS Step Functions is a serverless orchestration service that lets you build and run workflows using state machines. Coordinate multiple AWS services into business-critical applications.
4 
5## Table of Contents
6 
7- [Core Concepts](#core-concepts)
8- [Common Patterns](#common-patterns)
9- [CLI Reference](#cli-reference)
10- [Best Practices](#best-practices)
11- [Troubleshooting](#troubleshooting)
12- [References](#references)
13 
14## Core Concepts
15 
16### Workflow Types
17 
18| Type | Description | Pricing |
19|------|-------------|---------|
20| **Standard** | Long-running, durable, exactly-once | Per state transition |
21| **Express** | High-volume, short-duration | Per execution (time + memory) |
22 
23### State Types
24 
25| State | Description |
26|-------|-------------|
27| **Task** | Execute work (Lambda, API call) |
28| **Choice** | Conditional branching |
29| **Parallel** | Execute branches concurrently |
30| **Map** | Iterate over array |
31| **Wait** | Delay execution |
32| **Pass** | Pass input to output |
33| **Succeed** | End successfully |
34| **Fail** | End with failure |
35 
36### Amazon States Language (ASL)
37 
38JSON-based language for defining state machines.
39 
40## Common Patterns
41 
42### Simple Lambda Workflow
43 
44```json
45{
46  "Comment": "Process order workflow",
47  "StartAt": "ValidateOrder",
48  "States": {
49    "ValidateOrder": {
50      "Type": "Task",
51      "Resource": "arn:aws:lambda:us-east-1:123456789012:function:ValidateOrder",
52      "Next": "ProcessPayment"
53    },
54    "ProcessPayment": {
55…