Individual skill
aws-step-functions
Authors and edits AWS Step Functions state machines: writes Amazon States Language (ASL) in JSONata, and chooses and structures state types (Task, Choice, Map, Parallel, Pass, Wait, Succeed, Fail). Covers ASL syntax, JSONata data transformation and variables, Retry/Catch error handling, service integrations (.sync, waitForTaskToken callbacks), Distributed Map for large-scale S3/CSV processing, saga/compensation patterns, Standard vs Express workflow choice, TestState API unit testing, and migrating state machines from JSONPath to JSONata. Use when the user is building, authoring, debugging, or migrating a Step Functions state machine or ASL definition, or orchestrating multi-step workflows with branching, retries, or human-approval callbacks, even if they don't say 'Step Functions.' Do NOT use for general Lambda function code, API Gateway, EventBridge wiring, or SAM/CDK application packaging.
skills/specialized-skills/serverless-skills/aws-step-functions/SKILL.md
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SKILL.mdcore · 13,522 bytesassets/compensation-saga-pattern.asl.jsonasset · 3,708 bytesassets/express-standard-handoff.asl.jsonasset · 2,272 bytesassets/human-in-the-loop-with-timeout-escalation.asl.jsonasset · 3,484 bytesassets/nested-map-parallel-structures.asl.jsonasset · 2,095 bytesassets/polling-loop-wait-check-choice.asl.jsonasset · 2,025 bytesassets/scatter-gather-with-partial-results.asl.jsonasset · 2,256 bytesassets/semaphore-concurrency-lock.asl.jsonasset · 3,452 bytesreferences/architecture-patterns.mddoc · 5,260 bytesreferences/asl-state-types.mddoc · 12,077 bytesreferences/error-handling.mddoc · 6,142 bytesreferences/migrating-from-jsonpath-to-jsonata.mddoc · 11,615 bytesreferences/processing-state-inputs-and-outputs.mddoc · 7,521 bytesreferences/service-integrations.mddoc · 7,143 bytesreferences/transforming-data.mddoc · 6,052 bytesreferences/validation-and-testing.mddoc · 11,708 bytes
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# AWS Step Functions
## Overview
AWS Step Functions uses Amazon States Language (ASL) to define state machines as JSON. With AWS Step Functions, you can create workflows, also called state machines, to build distributed applications, automate processes, orchestrate microservices, and create data and machine learning pipelines.
This skill provides comprehensive guidance for writing state machines in ASL, covering:
- ASL structure and JSONata expression syntax
- Details on the eight available workflow states
- The `$states` reserved variable
- Workflow variables with `Assign`
- Error handling
- AWS Service integration patterns