Agent skill

Step Functions

by itsmostafa in itsmostafa/aws-agent-skills

AWS Step Functions workflow orchestration with state machines.

MITAuto-check passedDevelopment

Install Step Functions

skills CLI

$ npx skills add itsmostafa/aws-agent-skills --skill step-functions -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install itsmostafa/aws-agent-skills step-functions --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/itsmostafa/aws-agent-skills.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/step-functions .claude/skills/step-functions && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "step-functions" agent skill from https://github.com/itsmostafa/aws-agent-skills/tree/main/skills/step-functions into .claude/skills/step-functions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "step-functions", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/itsmostafa/aws-agent-skills/tree/main/skills/step-functions

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add itsmostafa/aws-agent-skills --skill step-functions -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install itsmostafa/aws-agent-skills step-functions --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itsmostafa/aws-agent-skills.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/step-functions .agents/skills/step-functions && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "step-functions" agent skill from https://github.com/itsmostafa/aws-agent-skills/tree/main/skills/step-functions into .agents/skills/step-functions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "step-functions", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add itsmostafa/aws-agent-skills --skill step-functions -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install itsmostafa/aws-agent-skills step-functions --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itsmostafa/aws-agent-skills.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/step-functions .cursor/skills/step-functions && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "step-functions" agent skill from https://github.com/itsmostafa/aws-agent-skills/tree/main/skills/step-functions into .cursor/skills/step-functions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "step-functions", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/itsmostafa/aws-agent-skills.git --path skills/step-functions

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add itsmostafa/aws-agent-skills --skill step-functions -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install itsmostafa/aws-agent-skills step-functions --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itsmostafa/aws-agent-skills.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/step-functions .gemini/skills/step-functions && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "step-functions" agent skill from https://github.com/itsmostafa/aws-agent-skills/tree/main/skills/step-functions into .gemini/skills/step-functions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "step-functions", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install itsmostafa/aws-agent-skills step-functions

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add itsmostafa/aws-agent-skills --skill step-functions -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/itsmostafa/aws-agent-skills.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/step-functions .github/skills/step-functions && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "step-functions" agent skill from https://github.com/itsmostafa/aws-agent-skills/tree/main/skills/step-functions into .github/skills/step-functions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "step-functions", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add itsmostafa/aws-agent-skills --skill step-functions -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install itsmostafa/aws-agent-skills step-functions --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/itsmostafa/aws-agent-skills.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/step-functions .opencode/skills/step-functions && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "step-functions" agent skill from https://github.com/itsmostafa/aws-agent-skills/tree/main/skills/step-functions into .opencode/skills/step-functions/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "step-functions", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: step-functions
GitHub stars: 1.2k
Token cost: ~2.4k tokens
SKILL.md length: 338 words
Files: 2
Skills in repo: 17
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

AWS Step Functions workflow orchestration with state machines.

Designing workflows
SKILL.md covers Table of Contents, Core Concepts, Common Patterns and CLI Reference, plus 3 more sections
Calls aws
Implementing error handling

What it does

Step Functions is an agent skill from itsmostafa/aws-agent-skills. AWS Step Functions workflow orchestration with state machines. Use when designing workflows, implementing error handling, configuring parallel execution, integrating with AWS services, or debugging executions.

Its SKILL.md is about 2.4k tokens, which your agent loads only when the skill is triggered. The skill folder holds 1 other file (for example `workflow-patterns.md`).

It sits in Development, covering Error handling. It works with Amazon Web Services. The repository describes itself as: AWS Skills for Agents. The licence is MIT.

When your agent uses it

Designing workflows
Implementing error handling
Configuring parallel execution
Integrating with AWS services

Example prompts

“/step-functions”

Requirements

Python 3

What it can do on your machine

Read from SKILL.md and the folder at commit e786d25. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- aws
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- docs.aws.amazon.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Step Functions loads about 2.4k tokens when it runs. Until then it costs about 56 tokens; SKILL.md has 338 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~56
When it runs · the whole SKILL.md, loaded when a task matches: ~2.4k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from itsmostafa/aws-agent-skills at commit e786d25, republished under its MIT licence (© itsmostafa). 338 words, ~2,427 tokens.

Download SKILL.mdSave it as .claude/skills/step-functions/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: step-functions
description: AWS Step Functions workflow orchestration with state machines. Use when designing workflows, implementing error handling, configuring parallel execution, integrating with AWS services, or debugging executions.
last_updated: 2026-01-07
doc_source: https://docs.aws.amazon.com/step-functions/latest/dg/

AWS Step Functions

AWS 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.

Core Concepts
Common Patterns
CLI Reference
Best Practices
Troubleshooting
References

Core Concepts

Workflow Types

Type	Description	Pricing
Standard	Long-running, durable, exactly-once	Per state transition
Express	High-volume, short-duration	Per execution (time + memory)

State Types

State	Description
Task	Execute work (Lambda, API call)
Choice	Conditional branching
Parallel	Execute branches concurrently
Map	Iterate over array
Wait	Delay execution
Pass	Pass input to output
Succeed	End successfully
Fail	End with failure

Amazon States Language (ASL)

JSON-based language for defining state machines.

Common Patterns

Simple Lambda Workflow

json

{
  "Comment": "Process order workflow",
  "StartAt": "ValidateOrder",
  "States": {
    "ValidateOrder": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:123456789012:function:ValidateOrder",
      "Next": "ProcessPayment"
    },
    "ProcessPayment": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:123456789012:function:ProcessPayment",
      "Next": "FulfillOrder"
    },
    "FulfillOrder": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:us-east-1:123456789012:function:FulfillOrder",
      "End": true
    }
  }
}

Create State Machine

AWS CLI:

bash

aws stepfunctions create-state-machine \
  --name OrderWorkflow \
  --definition file://workflow.json \
  --role-arn arn:aws:iam::123456789012:role/StepFunctionsRole \
  --type STANDARD

boto3:

python

import boto3
import json

sfn = boto3.client('stepfunctions')

definition = {
    "Comment": "Order workflow",
    "StartAt": "ProcessOrder",
    "States": {
        "ProcessOrder": {
            "Type": "Task",
            "Resource": "arn:aws:lambda:...",
            "End": True
        }
    }
}

response = sfn.create_state_machine(
    name='OrderWorkflow',
    definition=json.dumps(definition),
    roleArn='arn:aws:iam::123456789012:role/StepFunctionsRole',
    type='STANDARD'
)

Start Execution

python

import boto3
import json

sfn = boto3.client('stepfunctions')

response = sfn.start_execution(
    stateMachineArn='arn:aws:states:us-east-1:123456789012:stateMachine:OrderWorkflow',
    name='order-12345',
    input=json.dumps({
        'order_id': '12345',
        'customer_id': 'cust-789',
        'items': [{'product_id': 'prod-1', 'quantity': 2}]
    })
)

execution_arn = response['executionArn']

Choice State (Conditional Logic)

json

{
  "StartAt": "CheckOrderValue",
  "States": {
    "CheckOrderValue": {
      "Type": "Choice",
      "Choices": [
        {
          "Variable": "$.total",
          "NumericGreaterThan": 1000,
          "Next": "HighValueOrder"
        },
        {
          "Variable": "$.priority",
          "StringEquals": "rush",
          "Next": "RushOrder"
        }
      ],
      "Default": "StandardOrder"
    },
    "HighValueOrder": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:...:function:ProcessHighValue",
      "End": true
    },
    "RushOrder": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:...:function:ProcessRush",
      "End": true
    },
    "StandardOrder": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:...:function:ProcessStandard",
      "End": true
    }
  }
}

Parallel Execution

json

{
  "StartAt": "ProcessInParallel",
  "States": {
    "ProcessInParallel": {
      "Type": "Parallel",
      "Branches": [
        {
          "StartAt": "UpdateInventory",
          "States": {
            "UpdateInventory": {
              "Type": "Task",
              "Resource": "arn:aws:lambda:...:function:UpdateInventory",
              "End": true
            }
          }
        },
        {
          "StartAt": "SendNotification",
          "States": {
            "SendNotification": {
              "Type": "Task",
              "Resource": "arn:aws:lambda:...:function:SendNotification",
              "End": true
            }
          }
        },
        {
          "StartAt": "UpdateAnalytics",
          "States": {
            "UpdateAnalytics": {
              "Type": "Task",
              "Resource": "arn:aws:lambda:...:function:UpdateAnalytics",
              "End": true
            }
          }
        }
      ],
      "Next": "Complete"
    },
    "Complete": {
      "Type": "Succeed"
    }
  }
}

Map State (Iteration)

json

{
  "StartAt": "ProcessItems",
  "States": {
    "ProcessItems": {
      "Type": "Map",
      "ItemsPath": "$.items",
      "MaxConcurrency": 10,
      "Iterator": {
        "StartAt": "ProcessItem",
        "States": {
          "ProcessItem": {
            "Type": "Task",
            "Resource": "arn:aws:lambda:...:function:ProcessItem",
            "End": true
          }
        }
      },
      "ResultPath": "$.processedItems",
      "End": true
    }
  }
}

Error Handling

json

{
  "StartAt": "ProcessWithRetry",
  "States": {
    "ProcessWithRetry": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:...:function:Process",
      "Retry": [
        {
          "ErrorEquals": ["Lambda.ServiceException", "Lambda.TooManyRequestsException"],
          "IntervalSeconds": 2,
          "MaxAttempts": 6,
          "BackoffRate": 2
        },
        {
          "ErrorEquals": ["States.Timeout"],
          "IntervalSeconds": 5,
          "MaxAttempts": 3,
          "BackoffRate": 1.5
        }
      ],
      "Catch": [
        {
          "ErrorEquals": ["CustomError"],
          "ResultPath": "$.error",
          "Next": "HandleCustomError"
        },
        {
          "ErrorEquals": ["States.ALL"],
          "ResultPath": "$.error",
          "Next": "HandleAllErrors"
        }
      ],
      "End": true
    },
    "HandleCustomError": {
      "Type": "Task",
      "Resource": "arn:aws:lambda:...:function:HandleCustom",
      "End": true
    },
    "HandleAllErrors": {
      "Type": "Fail",
      "Error": "ProcessingFailed",
      "Cause": "An error occurred during processing"
    }
  }
}

CLI Reference

State Machine Management

Command	Description
`aws stepfunctions create-state-machine`	Create state machine
`aws stepfunctions update-state-machine`	Update definition
`aws stepfunctions delete-state-machine`	Delete state machine
`aws stepfunctions list-state-machines`	List state machines
`aws stepfunctions describe-state-machine`	Get details

Executions

Command	Description
`aws stepfunctions start-execution`	Start execution
`aws stepfunctions stop-execution`	Stop execution
`aws stepfunctions describe-execution`	Get execution details
`aws stepfunctions list-executions`	List executions
`aws stepfunctions get-execution-history`	Get execution history

Best Practices

Design

Keep states focused — one purpose per state
Use meaningful state names
Implement comprehensive error handling
Use Parallel for independent tasks
Use Map for batch processing

Performance

Use Express workflows for high-volume, short tasks
Set appropriate timeouts
Limit Map concurrency to avoid throttling
Use SDK integrations when possible (avoid Lambda wrapper)

Reliability

Retry transient errors
Catch and handle specific errors
Use idempotent operations
Enable X-Ray tracing

Cost Optimization

Use Express for short workflows (< 5 minutes)
Combine related operations to reduce transitions
Use Wait states instead of Lambda delays

Troubleshooting

Execution Failed

bash

# Get execution history
aws stepfunctions get-execution-history \
  --execution-arn arn:aws:states:us-east-1:123456789012:execution:MyWorkflow:exec-123 \
  --query 'events[?type==`TaskFailed` || type==`ExecutionFailed`]'

Lambda Timeout

Causes:

Lambda running too long
Task timeout too short

Fix:

json

{
  "Type": "Task",
  "Resource": "arn:aws:lambda:...",
  "TimeoutSeconds": 300,
  "HeartbeatSeconds": 60
}

State Stuck

Check:

Task state waiting for callback
Wait state not yet elapsed
Activity worker not responding

Invalid State Machine

bash

# Validate definition
aws stepfunctions validate-state-machine-definition \
  --definition file://workflow.json

References

Files

SKILL.md and 1 other file in skills/step-functions of itsmostafa/aws-agent-skills.

SKILL.md
workflow-patterns.md

Open the folder on GitHubat commit e786d25

Compare with similar skills

Step Functions next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Step Functions compared with similar skills
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AWS Lambda Durable Functionsawslabs/agent-plugins	915	—	~2.3k	Automated safety check: Pass	Apache-2.0	yesterday
AWS Lambda Durable Functionsaws/agent-toolkit-for-aws	2.8k	—	~2.3k	Automated safety check: Pass	Apache-2.0	today
Mole Bug Patternstw93/Mole	70k	—	~2k	Automated safety check: Pass	GPL-3.0	today
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Rust Best Practicesfarm-fe/farm	5.6k	3 repos	~1.1k	Automated safety check: Pass	MIT	17 days ago

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Questions about Step Functions

What does Step Functions do?

AWS Step Functions workflow orchestration with state machines. Step Functions is an agent skill from itsmostafa/aws-agent-skills. AWS Step Functions workflow orchestration with state machines.

When should I use Step Functions?

Step Functions fits situations like: designing workflows; implementing error handling; configuring parallel execution; integrating with AWS services.

How do I install Step Functions in Claude Code?

Run `npx skills add itsmostafa/aws-agent-skills --skill step-functions -a claude-code`. Or copy the skill folder (skills/step-functions in itsmostafa/aws-agent-skills) into .claude/skills/step-functions in your project. Claude Code loads it when a task matches its description.

How do I install Step Functions in Codex?

Run `npx skills add itsmostafa/aws-agent-skills --skill step-functions -a codex`. Or copy the skill folder (skills/step-functions in itsmostafa/aws-agent-skills) into .agents/skills/step-functions in your project. Codex loads it when a task matches its description.

Can I use Step Functions in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add itsmostafa/aws-agent-skills --skill step-functions -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/step-functions, .gemini/skills/step-functions, .github/skills/step-functions and .opencode/skills/step-functions in your project.

What does Step Functions need to run?

Going by SKILL.md and its folder, Step Functions needs the command-line tools its instructions call (aws). Our summary lists: Python 3.

Does Step Functions access the network?

SKILL.md names 1 domain. As links in the text: docs.aws.amazon.com. This is read from the text; nothing was executed.

Is Step Functions safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Step Functions use?

Step Functions is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Step Functions use?

About 2.4k tokens (SKILL.md is roughly 9.7k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Step Functions?

Skills that share tags, products or a category with Step Functions: AWS Lambda Durable Functions (awslabs/agent-plugins, 915 stars), AWS Lambda Durable Functions (aws/agent-toolkit-for-aws, 2.8k stars), Mole Bug Patterns (tw93/Mole, 70k stars) and Native Data Fetching (CherryHQ/cherry-studio-app, 4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Step Functions?

itsmostafa (a GitHub user) maintains it in itsmostafa/aws-agent-skills, which has 1,162 GitHub stars. The repository holds 17 skills in this directory. The repository was last updated on October 5, 2026.

Source: itsmostafa/aws-agent-skills on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Step Functions

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

AWS Step Functions

Table of Contents

Core Concepts

Workflow Types

State Types

Amazon States Language (ASL)

Common Patterns

Simple Lambda Workflow

Create State Machine

Start Execution

Choice State (Conditional Logic)

Parallel Execution

Map State (Iteration)

Error Handling

CLI Reference

State Machine Management

Executions

Best Practices

Design

Performance

Reliability

Cost Optimization

Troubleshooting

Execution Failed

Lambda Timeout

State Stuck

Invalid State Machine

References

Files

Compare with similar skills

Similar skills

More from itsmostafa/aws-agent-skills

Related

Questions about Step Functions