# Claude Code v0.2.78

> Claude Code v0.2.78, released 22 Apr 2025 (2025-04-22). 8 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/0.2.78

## Changes

# Claude Code v0.2.78 Changelog

### OAuth Token Refresh Support

- **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

### Configurable Telemetry Settings

- **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

**Example usage**

`  # Disable session ID tracking
  OTEL_METRICS_INCLUDE_SESSION_ID=false claude

  # Enable version tracking
  OTEL_METRICS_INCLUDE_VERSION=true claude`

### Enhanced OAuth Infrastructure

- 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

### Code Organization

- 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

### OAuth Token Management

- 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

## Internal Changes

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

## Technical Details

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