254 Lamdba Layers Sop 2256ec7f

Lambda Layers Standard Operating Procedures (SOP)

Overview

This document defines the standard operating procedures for managing Strands Agents Lambda layers across all AWS regions, Python versions, and architectures.

Total: 136 individual Lambda layers (17 regions × 2 architectures × 4 Python versions). All variants must maintain the same layer version number for each PyPI package version, with only one row per PyPI version appearing in documentation.

Deployment Process

1. Initial Deployment

1. Run workflow with ALL options selected (default)
2. Specify PyPI package version
3. Type "Create Lambda Layer {package_version}" to confirm
4. All 136 individual layers deploy in parallel (4 Python × 2 arch × 17 regions)
5. Each layer gets its own unique name: strands-agents-py{PYTHON_VERSION}-{ARCH}

2. Version Buffering for New Variants

When adding new variants (new Python version, architecture, or region):

1. Determine target layer version: Check existing variants to find the highest layer version
2. Buffer deployment: Deploy new variants multiple times until layer version matches existing variants
3. Example: If existing variants are at layer version 5, deploy new variant 5 times to reach version 5

3. Handling Transient Failures

When some regions fail during deployment:

1. Identify failed regions: Check which combinations didn't complete successfully
2. Targeted redeployment: Use specific region/arch/Python inputs to redeploy failed combinations
3. Version alignment: Continue deploying until all variants reach the same layer version
4. Verification: Confirm all combinations have identical layer versions before updating docs