New pattern - Lambda SnapStart with Amazon Bedrock (CDK)

[NithinChandranR-AWS]

Description

This pattern deploys a Python 3.13 Lambda function with SnapStart enabled that invokes Amazon Bedrock (Claude Sonnet) for text generation, using AWS CDK.

Key Features

• Lambda SnapStart via SnapStartConf.ON_PUBLISHED_VERSIONS — reduces cold start latency by up to 10x
• Published version + live alias (SnapStart only applies to published versions, not $LATEST)
• boto3 client initialized at module level for snapshot capture
• Inference profile model ID with scoped IAM permissions
• JSON structured logging with 2-week retention

Architecture

Lambda (Python 3.13, SnapStart) ──▶ Amazon Bedrock (Claude Sonnet)

Testing

Deployed and tested on AWS account. Verified:

• ExecutedVersion: 1 confirms invocation through SnapStart-optimized alias
• Successful Bedrock Claude Sonnet response with usage metadata
• SnapStart alias shows Restore Duration instead of Init Duration in CloudWatch Logs

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation (README.md)
• My changes generate no new warnings
• New and existing tests pass locally with my changes
• example-pattern.json included