# Claude Code v0.2.56

> Claude Code v0.2.56, released 27 Mar 2025 (2025-03-27). 6 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/0.2.56

## Changes

### New Features

Enhanced Permission System

- **New granular permission rules**: The permission system now supports more specific rule configurations with the ability to grant permissions for specific command patterns
- Example: You can now allow `bash` commands that start with specific prefixes like `npm:*` or `git:*`
- Rules can be configured through both CLI arguments and local settings

Supervisor Mode

- Added a new "supervisorMode" setting to the configuration options
- This appears to be a new operational mode for Claude Code (specific functionality details would need further investigation)

Environment Variable Overrides Display

- The welcome screen now displays active environment variable overrides when present, including:
- Custom API keys (shown as `sk-ant-…` with partial masking)
- Prompt caching status (shows "off" when disabled via `DISABLE_PROMPT_CACHING`)
- API timeout settings (from `API_TIMEOUT_MS`)
- Maximum thinking tokens (from `MAX_THINKING_TOKENS`)
- Custom API base URL (from `ANTHROPIC_BASE_URL`)

WebSearch Tool Enhancement

- WebSearch tool now supports domain filtering:
- `allowed_domains`: Restrict search results to specific domains
- `blocked_domains`: Exclude results from specific domains
- Example usage: Search only within documentation sites or exclude certain sources

Project-wide MCP Server Settings

- New `enableAllProjectMcpServers` configuration option
- Allows enabling all MCP (Model Context Protocol) servers for a project at once

### Performance Improvements

Intelligent Retry Backoff

- Retry delays now include a random jitter (up to 25% of base delay) to prevent thundering herd problems
- This helps distribute retry attempts when multiple operations fail simultaneously

Host Validation Optimization

- Added caching for CLAUDE.md host validation to reduce repeated lookups
- Improves performance when checking URLs referenced in project documentation

### Technical Improvements

Enhanced Spinner Animation System

- Refactored the progress indicator system with new `Ov5` function
- Supports different spinner styles, colors, and update intervals based on context
- More flexible configuration for tool-use, responding, and thinking states

Stream Processing

- Updated stream handling to use proper Node.js stream imports
- Added new `gk` function for consuming async iterators completely

### Bug Fixes

- Fixed duplicate comment issue (as mentioned in recent commits)
- Improved error handling in permission checking system
- Better handling of aborted operations with proper cleanup

### Internal Changes

- Refactored permission checking logic to use a rule-based system
- Updated tool configuration with new tools array structure
- Constants for line limits now properly defined (`m91` and `j91` both set to 2000)
- Better separation of concerns in the permission validation flow

### Breaking Changes

None identified - the update maintains backward compatibility while adding new optional features.