AWS Lambda
AWS LabsOfficialPublished by AWS Labs
- Skill
- Tool integration
- Cloud and DevOps
- Apache-2.0
- Low risk
AutoGineer summary
Written by AutoGineer from the skill’s own files, not by the author
This skill provides comprehensive support for developing serverless applications on AWS. It integrates with the AWS Serverless MCP Server to assist with project initialization, infrastructure-as-code (IaC) generation, deployment, and debugging. It covers event-driven architectures, web application deployment via Lambda Web Adapter, and performance optimization, while enforcing best practices for security, idempotency, and observability.
What it does
- Initializes and builds serverless projects using SAM CLI or CDK.
- Configures event source mappings for services like DynamoDB, SQS, and Kinesis.
- Deploys full-stack web applications using the Lambda Web Adapter.
- Implements event-driven architectures with EventBridge and schema management.
- Provides troubleshooting guidance for common deployment and runtime errors.
- Enforces security best practices including least-privilege IAM and secret management.
When to use it
- When starting a new serverless project on AWS.
- When configuring event-driven triggers for Lambda functions.
- When deploying web APIs or full-stack applications to AWS Lambda.
- When optimizing Lambda performance, cost, or cold-start times.
- When debugging deployment failures or runtime errors in serverless stacks.
Advantages
- Automated validation of IaC templates via SAM CLI integration.
- Built-in support for AWS Lambda Powertools for logging and idempotency.
- Clear guidance on choosing between choreography and orchestration patterns.
- Comprehensive troubleshooting and limit references for rapid debugging.
- Standardized project setup using industry-recognized frameworks.
Usage examples
- “Create a new serverless API project using TypeScript and CDK.”
- The agent will initialize a new project structure, generate the necessary CDK constructs for an API Gateway and Lambda function, and set up the project configuration.
- “How do I configure my Lambda to process messages from an SQS queue?”
- The agent will provide the configuration steps for an Event Source Mapping, including best practices for batch sizes and partial failure handling.
- “My Lambda function is failing with a timeout error, how can I debug it?”
- The agent will guide you through checking CloudWatch logs, reviewing memory settings, and potentially using X-Ray tracing to identify the bottleneck.
Install
Download the skill as a ZIP:
https://autogineer.com/agent-skills/awslabs/aws-lambda/downloadUnzip it into the cross-client skills folder of your project:
mkdir -p .agents/skills && unzip aws-lambda.zip -d .agents/skills
Documentation by AWS Labs
AWS Lambda Serverless Development
Design, build, deploy, and debug serverless applications with AWS serverless services. This skill provides access to serverless development guidance through the AWS Serverless MCP Server, helping you to build production-ready serverless applications with best practices built-in.
Use SAM CLI for project initialization and deployment, Lambda Web Adapter for web applications, or Event Source Mappings for event-driven architectures. AWS handles infrastructure provisioning, scaling, and monitoring automatically.
Key capabilities:
SAM CLI Integration: Initialize, build, deploy, and test serverless applications
Web Application Deployment: Deploy full-stack applications with Lambda Web Adapter
Event Source Mappings: Configure Lambda triggers for DynamoDB, Kinesis, SQS, Kafka
Lambda durable functions: Resilient multi-step applications with checkpointing — see the durable-functions skill for guidance
Lambda Managed Instances: Run Lambda on dedicated EC2 instances with managed lifecycle — see the managed-instances skill for evaluation, configuration, and migration guidance
Schema Management: Type-safe EventBridge integration with schema registry
Observability: CloudWatch logs, metrics, and X-Ray tracing
Performance Optimization: Right-sizing, cost optimization, and troubleshooting
When to Load Reference Files
Load the appropriate reference file based on what the user is working on:
Getting started, what to build, project type decision, or working with existing projects -> see references/getting-started.md
SAM, CDK, deployment, IaC templates, CDK constructs, or CI/CD pipelines -> see the aws-serverless-deployment skill (separate skill in this plugin)
Web app deployment, Lambda Web Adapter, API endpoints, CORS, authentication, custom domains, or sam local start-api -> see references/web-app-deployment.md
Event sources, DynamoDB Streams, Kinesis, SQS, Kafka, S3 notifications, or SNS -> see references/event-sources.md
EventBridge, event bus, event patterns, event design, Pipes, or schema registry -> see references/event-driven-architecture.md
Durable functions, checkpointing, replay model, saga pattern, or long-running Lambda workflows -> see the durable-functions skill (separate skill in this plugin with full SDK reference, testing, and deployment guides)
Lambda Managed Instances, LMI, capacity providers, multi-concurrency, EC2-backed Lambda, cold start elimination, or Lambda cost optimization with Reserved Instances -> see the managed-instances skill (separate skill in this plugin for evaluation, configuration, and migration)
Orchestration, workflows, or Durable Functions vs Step Functions -> see references/orchestration-and-workflows.md
Step Functions, ASL, state machines, JSONata, Distributed Map, SDK integrations, TestState API, mocking service integrations, or state machine unit tests -> see the aws-step-functions skill for comprehensive guidance
Observability, logging, tracing, metrics, alarms, or dashboards -> see references/observability.md
Optimization, cold starts, memory tuning, cost, or streaming -> see references/optimization.md
Powertools, idempotency, feature flags, parameters, parser, batch processing, or data masking -> see references/powertools.md
Troubleshooting, errors, debugging, or deployment failures -> see references/troubleshooting.md
Best Practices
Project Setup
Do: Use
sam_initorcdk initwith an appropriate template for your use caseDo: Set global defaults for timeout, memory, runtime, and tracing (
Globalsin SAM, construct props in CDK)Do: Use AWS Lambda Powertools for structured logging, tracing, metrics (EMF), idempotency, and batch processing — available for Python, TypeScript, Java, and .NET
Don't: Copy-paste templates from the internet without understanding the resource configuration
Don't: Use the same memory and timeout values for all functions regardless of workload
Security
Do: Follow least-privilege IAM policies scoped to specific resources and actions
Do: Use
secure_esm_*tools to generate correct IAM policies for event source mappingsDo: Store secrets in AWS Secrets Manager or SSM Parameter Store, never in environment variables
Do: Use VPC endpoints instead of NAT Gateways for AWS service access when possible
Do: Enable Amazon GuardDuty Lambda Protection to monitor function network activity for threats (cryptocurrency mining, data exfiltration, C2 callbacks)
Don't: Use wildcard (
*) resource ARNs or actions in IAM policiesDon't: Hardcode credentials or secrets in application code or templates
Don't: Store user data or sensitive information in module-level variables — execution environments can be reused across different callers
Idempotency
Do: Write idempotent function code — Lambda delivers events at least once, so duplicate invocations must be safe
Do: Use the AWS Lambda Powertools Idempotency utility (backed by DynamoDB) for critical operations
Do: Validate and deduplicate events at the start of the handler before performing side effects
Don't: Assume an event will only ever be processed once
For topic-specific best practices, see the dedicated guide files in the reference table above.
Lambda Limits Quick Reference
Limits that developers commonly hit:
| Resource | Limit |
|---|---|
| Function timeout | 900 seconds (15 minutes) |
| Memory | 128 MB – 10,240 MB |
| 1 vCPU equivalent | 1,769 MB memory |
| Synchronous payload (request + response) | 6 MB each |
| Async invocation payload | 1 MB |
| Streamed response | 200 MB |
| Deployment package (.zip, uncompressed) | 250 MB |
| Deployment package (.zip upload, compressed) | 50 MB |
| Container image | 10 GB |
| Layers per function | 5 |
| Environment variables (aggregate) | 4 KB |
/tmp ephemeral storage | 512 MB – 10,240 MB |
| Account concurrent executions (default) | 1,000 (requestable increase) |
| Burst scaling rate | 1,000 new executions per 10 seconds |
Check Service Quotas for your account limits: aws lambda get-account-settings
Troubleshooting Quick Reference
| Error | Cause | Solution |
|---|---|---|
Build Failed | Missing dependencies | Run sam_build with use_container: true |
Stack is in ROLLBACK_COMPLETE | Previous deploy failed | Delete stack with aws cloudformation delete-stack, redeploy |
IteratorAge increasing | Stream consumer falling behind | Increase ParallelizationFactor and BatchSize. Use esm_optimize |
| EventBridge events silently dropped | No DLQ, retries exhausted | Add RetryPolicy + DeadLetterConfig to rule target |
| Step Functions failing silently | No retry on Task state | Add Retry with Lambda.ServiceException, Lambda.AWSLambdaException |
| Durable Function not resuming | Missing IAM permissions | Add lambda:CheckpointDurableExecution and lambda:GetDurableExecutionState — see durable-functions skill |
For detailed troubleshooting, see references/troubleshooting.md.
Configuration
AWS CLI Setup
This skill requires that AWS credentials are configured on the host machine:
Verify access: Run aws sts get-caller-identity to confirm credentials are valid
SAM CLI Setup
Install SAM CLI: Follow the SAM CLI installation guide
Verify: Run
sam --version
Container Runtime Setup
Install a Docker compatible container runtime: Required for
sam_local_invokeand container-based buildsVerify: Use an appropriate command such as
docker --versionorfinch --version
MCP Server Configuration
Write access is enabled by default. The plugin ships with --allow-write in .mcp.json, so the MCP server can create projects, generate IaC, and deploy on behalf of the user.
Access to sensitive data (like Lambda and API Gateway logs) is not enabled by default. To grant it, add --allow-sensitive-data-access to .mcp.json.
SAM Template Validation Hook
This plugin includes a PostToolUse hook that runs sam validate automatically after any edit to template.yaml or template.yml. If validation fails, the error is returned as a system message so you can fix it immediately. The hook requires SAM CLI and jq to be installed; if either is missing, validation is skipped with a system message. Users can disable it via /hooks.
Verify: Run jq --version
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
Serverless MCP Server Unavailable
Inform user: "AWS Serverless MCP not responding"
Ask: "Proceed without MCP support?"
DO NOT continue without user confirmation
Resources
Files
- ATTRIBUTION.mdAdded by AutoGineer906 B
- LICENSELicence file added by AutoGineer9.9 KiB
- NOTICELicence file added by AutoGineer89 B
- SKILL.md12.1 KiB
- references/event-driven-architecture.md15.6 KiB
- references/event-sources.md16.3 KiB
- references/getting-started.md6.0 KiB
- references/observability.md22.7 KiB
- references/optimization.md14.5 KiB
- references/orchestration-and-workflows.md6.2 KiB
- references/powertools.md10.2 KiB
- references/troubleshooting.md11.3 KiB
- references/web-app-deployment.md10.6 KiB
LICENSE
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
Requirements and compatibility
Written for: Claude Code
Works with: Claude Code, Claude apps, OpenAI Codex, GitHub Copilot, Cursor, Gemini CLI, Kiro, OpenCode, Goose, Amp, Roo Code, JetBrains Junie, Factory Droid, Devin (ex-Windsurf), Mistral Vibe, OpenHands, Letta
“Works with” means the tool reads the open Agent Skills format; a skill written for one tool may use features others lack.
Needs: Claude Code frontmatter, Needs an MCP server
Security
What our scanner noticed· Low risk
- Instructions that use the network
A static scan is not a guarantee. Skills are third-party content: review a skill before you let an agent use it.
Attribution and licence
- Published by
- AWS Labs
- Publisher
- AWS Labs (Official)
- Source
- awslabs/agent-plugins · plugins/aws-serverless/skills/aws-lambda · commit fbefb37
- Licence
- Apache License 2.0 (redistribution allowed)
- LICENSE (added by AutoGineer from LICENSE)
- NOTICE (added by AutoGineer from NOTICE)
- ATTRIBUTION.md (written by AutoGineer)
- Synced
AutoGineer is not affiliated with or endorsed by AWS Labs or AWS Labs.
Download ZIP
The ZIP holds the skill’s files, its licence files and an ATTRIBUTION.md. Download aws-lambda.zip