What is aws-lambda-durable-functions?

A guide to building long-running, multi-step applications with AWS Lambda durable functions. These functions save their progress, retry failed steps, and coordinate work that may be interrupted or run for a long time.

Use it to build TypeScript, JavaScript, or Python workflows; add retries and state persistence; handle waits and callbacks; use saga-style error recovery; test; and deploy with AWS tools.

It helps applications continue reliably through failures, pauses, callbacks, and interruptions instead of losing their progress.

aws-lambda-durable-functions — Skill for Claude Code by awslabs

About the project

awslabs/agent-plugins is a collection of plugins, skills, instructions, an MCP server, a hook, and a setting that guide AI coding agents in architecting, deploying, and operating software on Amazon Web Services. It is for developers using coding agents such as Claude Code, Codex, and Cursor with AWS projects. The catalogue entries are the repository's own agent workflows and supporting components.

awslabs/agent-plugins · 924 stars · on GitHub

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add awslabs/agent-plugins --skill aws-lambda-durable-functions

Clone the repo

git clone --depth 1 https://github.com/awslabs/agent-plugins

Made for: Claude Code.

Or install aws-serverless, the plugin that ships this one along with the rest of its 7 skills, 1 hook.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/awslabs/agent-plugins/aws-lambda-durable-functions/github.svg)](https://agentmods.dev/skills/awslabs/agent-plugins/aws-lambda-durable-functions)

Your own site

<a href="https://agentmods.dev/skills/awslabs/agent-plugins/aws-lambda-durable-functions"><img src="https://agentmods.dev/badge/skills/awslabs/agent-plugins/aws-lambda-durable-functions/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/awslabs/agent-plugins/aws-lambda-durable-functions"><img src="https://agentmods.dev/badge/skills/awslabs/agent-plugins/aws-lambda-durable-functions.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 109 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,062 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector pass 7 Sept 2026

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00109	$0.02062
Opus 5.5	$0.00044	$0.00825
Sonnet 5.5	$0.00022	$0.00412
Haiku 4.5	$0.00011	$0.00206

Measured 1mo ago against content hash 30b5352bc7ca, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

aws-lambda-durable-functions scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugins/aws-serverless/skills/aws-lambda-durable-functions/SKILL.md · 205 lines

How it starts

The opening of the file, as written. The whole thing — 205 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AWS Lambda durable functions

Build resilient multi-step applications and AI workflows that can execute for up to 1 year while maintaining reliable progress despite interruptions.

Onboarding

Step 1: Validate Prerequisites

Before using AWS Lambda durable functions, verify:

AWS CLI is installed (2.33.22 or higher) and configured:
```
aws --version
aws sts get-caller-identity
```
Runtime environment is ready:
- For TypeScript/JavaScript: Node.js 22+ (node --version)
- For Python: Python 3.11+ (python --version. Note that currently only Lambda runtime environments 3.13+ come with the Durable Execution SDK pre-installed. 3.11 is the min supported Python version by the Durable SDK itself, however, you could use OCI to bring your own container image with your own Python runtime + Durable SDK.)
Deployment capability exists (one of):
- AWS SAM CLI (sam --version) 1.153.1 or higher
- AWS CDK (cdk --version) v2.237.1 or higher
- Direct Lambda deployment access

Step 2: Select language and IaC framework

Language Selection

Default: TypeScript

Override syntax:

"use Python" → Generate Python code
"use JavaScript" → Generate JavaScript code

When not specified, ALWAYS use TypeScript

IaC framework selection

Default: CDK

Override syntax:

"use CloudFormation" → Generate YAML templates
"use SAM" → Generate YAML templates

When not specified, ALWAYS use CDK

Error Scenarios

Unsupported Language

List detected language
State: "Durable Execution SDK is not yet available for [framework]"
Suggest supported languages as alternatives

Unsupported IaC Framework

List detected framework
State: "[framework] might not support Lambda durable functions yet"
Suggest supported frameworks as alternatives

Serverless MCP Server Unavailable

Inform user: "AWS Serverless MCP not responding"
Ask: "Proceed without MCP support?"
DO NOT continue without user confirmation

Read the full file on GitHub · 205 lines

Files

What ships with it

11 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 205 lines · 109 tokens per session scan A 30b5352bc7ca

Subscribe to this mod's changes

aws-lambda-durable-functions is a skill published in the GitHub repository awslabs/agent-plugins (924 stars, last pushed 3d ago), licensed Apache-2.0. It adds 109 tokens to every session and 2,062 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Backend and APIs Cloud DevOps and cloud agent-plugins agent-skills agents aws coding-agent-skills coding-agents

dynamo-recipe-runner

Select, validate, patch, and deploy existing NVIDIA Dynamo Kubernetes recipes. Use for model/backend/GPU/deployment-mode recipe bring-up; use router-starter for router-only mode work and troubleshoot for broken deployments.

NVIDIA/skills · 49 tokens

azure-eventhub-dotnet

Azure Event Hubs SDK for .NET. Use for high-throughput event streaming: sending events (EventHubProducerClient, EventHubBufferedProducerClient), receiving events (EventProcessorClient with checkpointing), partition management, and real-time data ingestion. Triggers: "Event Hubs", "event streaming"…

microsoft/skills · 94 tokens

azure-mgmt-apimanagement-dotnet

Azure Resource Manager SDK for API Management in .NET. Use for MANAGEMENT PLANE operations: creating/managing APIM services, APIs, products, subscriptions, policies, users, groups, gateways, and backends via Azure Resource Manager. Triggers: "API Management", "APIM service", "create APIM", "manage APIs"…

microsoft/skills · 97 tokens

azure-mgmt-botservice-dotnet

Azure Resource Manager SDK for Bot Service in .NET. Management plane operations for creating and managing Azure Bot resources, channels (Teams, DirectLine, Slack), and connection settings. Triggers: "Bot Service", "BotResource", "Azure Bot", "DirectLine channel", "Teams channel", "bot management .NET", "create bot".

microsoft/skills · 78 tokens

azure-servicebus-dotnet

Azure Service Bus SDK for .NET. Enterprise messaging with queues, topics, subscriptions, and sessions. Use for reliable message delivery, pub/sub patterns, dead letter handling, and background processing. Triggers: "Service Bus", "ServiceBusClient", "ServiceBusSender", "ServiceBusReceiver", "ServiceBusProcessor"…

microsoft/skills · 86 tokens

durable-objects

Build, debug, or review Cloudflare Durable Objects code for persistent state and coordination.

cloudflare/skills · 22 tokens