Azure AI Foundry Support

What: Claude Code now supports connecting to Claude models deployed on Azure AI Foundry with Azure AD token authentication

How to use:

# Enable Foundry mode
export CLAUDE_CODE_USE_FOUNDRY=true

# Option 1: Use API key authentication
export ANTHROPIC_FOUNDRY_API_KEY=your-api-key
export ANTHROPIC_FOUNDRY_BASE_URL=https://your-resource.services.ai.azure.com/anthropic/

# Option 2: Use resource name (automatically constructs URL)
export ANTHROPIC_FOUNDRY_RESOURCE=your-resource-name

# Option 3: Use Azure AD authentication (no API key needed)
# Azure AD token provider is automatically configured

Details:

• Supports both API key and Azure AD token provider authentication methods
• Can specify either a full baseURL or a resource name (which constructs the Azure services URL automatically)
• Azure AD authentication uses the https://cognitiveservices.azure.com/.default scope
• For testing/debugging, you can skip authentication with CLAUDE_CODE_SKIP_FOUNDRY_AUTH=true
• Foundry deployments are now recognized as a first-party environment alongside standard Anthropic deployments
• Evidence: dsA class at line 202345, Foundry client initialization in xw() at line 243262, environment detection via j3() at line 86382