# Claude Code v1.0.109

> Claude Code v1.0.109, released 8 Sep 2025 (2025-09-08). 7 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/1.0.109

Version 1.0.109 introduces asynchronous hook support, enabling long-running hooks to execute in the background without blocking conversation flow, along with improved API error tracking for better debugging.

## Changes

### Asynchronous Hook Execution

**What:** Hooks can now run asynchronously in the background, allowing long-running operations without blocking the main conversation **How to use:**

`{ "async": true, "asyncTimeout": 30000 }` **Details:**

- Background process management for async hooks
- Configurable timeout settings (default 15 seconds)
- Automatic response collection and delivery
- Process cleanup when hooks complete or timeout
- **Evidence**: `D$A() at line 362558`, `s10() at line 362783`, `U$A() at line 362581`

### Enhanced API Error Tracking

**What:** Improved error reporting with gateway and infrastructure tracking for API failures **How to use:** Automatic - enhanced error information appears in debug logs and telemetry **Details:**

- Extracts gateway information from API response headers
- Better visibility into which infrastructure components handled requests
- Enhanced debugging capabilities for API failures
- **Evidence**: `JE0() header extraction function`, `VE0() at line 393771` (renamed from `XE0`)

### Hook Registry Management

Enhanced hook execution with background process tracking, timeout management, and response collection system for better reliability and performance.

### Rewind Feature UI

Improved checkpoint and rewind interface with better display of code changes, timestamps, and checkpoint status for enhanced user feedback.

### Code Organization

Function renaming and reorganization (`XE0` → `VE0`) as part of ongoing code maintenance and improved structure.

### Stream Import Cleanup

Removed redundant stream import (`o7Q`) that was no longer needed, reducing bundle size and potential conflicts.

### Dead Code Removal

Removed unused functions (`eP5()`, `e$0()`) that served no purpose, improving code cleanliness and maintainability.