Anthropic Upgrade & Migration

Overview

Upgrade the Anthropic SDK to new versions and migrate between Claude model generations. Covers version checking, changelog review, model ID updates across the codebase, output comparison testing, and gradual rollout via environment variables.

SDK Upgrade

# Check current version
npm list @claude-ai/sdk
pip show anthropic

# Upgrade to latest
npm install @claude-ai/sdk@latest
pip install --upgrade anthropic

# Check changelog for breaking changes
#