Claude Code v0.2.78

# Claude Code v0.2.78 Changelog

• Added automatic OAuth token refresh functionality for MCP (Model Context Protocol) connections
• When an OAuth access token expires, Claude Code will now automatically attempt to refresh it using the refresh token
• This prevents authentication interruptions during long sessions
• Usage: This happens automatically in the background when using MCP servers that require OAuth authentication

• New environment variables for controlling telemetry data collection:
• OTEL_METRICS_INCLUDE_SESSION_ID (default: true) - Controls whether session IDs are included in metrics
• OTEL_METRICS_INCLUDE_VERSION (default: false) - Controls whether the app version is included in metrics
• OTEL_METRICS_INCLUDE_ACCOUNT_UUID (default: true) - Controls whether account UUIDs are included in metrics

  # Disable session ID tracking
  OTEL_METRICS_INCLUDE_SESSION_ID=false claude
  
  # Enable version tracking
  OTEL_METRICS_INCLUDE_VERSION=true claude

• Added OAuth authorization server metadata discovery following the .well-known/oauth-authorization-server specification
• Improved error handling for OAuth token refresh failures with detailed error messages
• Added fallback OAuth configuration for servers that don't support metadata discovery

• Refined import statements to use more specific imports (e.g., import { PassThrough as ou9 } from "stream" instead of importing the entire stream module)
• Added proper process imports using the node: prefix convention

• Fixed potential issues with expired OAuth tokens by implementing proper refresh logic
• Added validation to ensure refresh tokens are only used when available
• Improved error recovery when token refresh fails

• Added constant LI3 = 60000 (60 seconds timeout value)
• Updated MCP protocol version to "2024-11-05"
• Version bump to 0.2.78

The OAuth token refresh implementation includes:

• Automatic detection of expired tokens based on expiresAt timestamp
• Support for OAuth 2.0 refresh token grant type
• Proper handling of client credentials (client_id and client_secret)
• Telemetry events for tracking refresh success/failure rates