---
name: "aws-lambda-container-image"
description: "Package large Lambda functions (up to 10GB) as Docker containers with provisioned concurrency."
metadata:
  author: "AWS"
  version: "1.0.0"
  runtime_compatibility:
    - "codex"
    - "claude-code"
    - "cursor"
    - "windsurf"
triggers:
  - "build lambda container image"
  - "eliminate lambda cold start"
  - "configure provisioned concurrency"
permissions:
  fs_read: true
  fs_write: "workspace"
  shell_exec: false
  net_access: false
---

# AWS Lambda Container Image Packaging & Provisioned Concurrency

Builds AWS Lambda containers: using AWS Lambda base images, configuring runtime interface emulator (RIE) for local debugging, tuning memory allocations, and setting Provisioned Concurrency to eliminate cold starts.

## When to Invoke
Invoke this skill whenever you need to:
- build lambda container image
- eliminate lambda cold start
- configure provisioned concurrency

## Execution SOP & Rules
1. Base Dockerfile on public.ecr.aws/lambda/python:3.12 or install aws-lambda-ric in custom image.
2. Define CMD ['app.handler'] pointing to your entrypoint handler function.
3. Publish image to Amazon ECR and deploy Lambda function with package-type Image.
4. Configure provisioned concurrency on a published Lambda version alias (e.g. prod).

## Verification Checklist
- Run local linting, syntax validation, and type-checks before reporting completion.
- Ensure all created or modified files adhere to workspace boundaries and avoid uncommitted secrets.
- Verify tests or build commands exit cleanly with return code 0.