# Claude Code v0.2.51

> Claude Code v0.2.51, released 20 Mar 2025 (2025-03-20). 5 entries read out of the shipped bundle. Unofficial, and not affiliated with Anthropic.

Web version: https://changelogs.core-directive.com/v/0.2.51

## Changes

### New Features

Local Installation Migration Tool

A new command `migrate-installer` has been added to help users migrate from global npm installation to a local installation in their home directory. This provides better isolation and avoids global dependency conflicts.

**Usage:**

`claude migrate-installer` This interactive command will:

- Install Claude CLI locally to `~/.claude/local/`
- Set up shell aliases for the `claude` command
- Uninstall the global npm package

The migration process includes progress tracking and error handling, with telemetry to monitor success rates.

Enhanced Memory Management UI

The memory management interface has been completely redesigned with a more user-friendly selection system:

- **Visual improvements**: Better layout with clear descriptions and examples for each memory type
- **Three memory locations**:
- **Project memory** - Stored in `./CLAUDE.md` (checked into version control)
- **Project memory (local)** - Stored in `./CLAUDE.local.md` (gitignored)
- **User memory** - Stored in `~/.claude/CLAUDE.md` (global across all projects)
- **Interactive selection**: Use arrow keys to navigate between options with visual feedback
- **Helpful examples**: Each memory type now shows concrete usage examples

MCP Server Approval System

New security features for MCP (Model Context Protocol) servers detected in project `.mcp.json` files:

- **Batch approval**: When multiple MCP servers are detected, users can select which ones to enable using a checkbox interface
- **Single server approval**: For projects with one MCP server, a simple yes/no prompt
- **Security warnings**: Clear explanations about MCP server capabilities and risks
- **Persistent choices**: Approved/rejected servers are saved and remembered
- **Management command**: Users can reset their choices with `claude mcp reset-project-choices`

**Interactive prompts:**

- Space to select/deselect servers
- Enter to confirm selections
- Escape to reject all servers

### Improvements

Enhanced URL Detection and Handling

- **Improved URL extraction**: Now detects both full URLs and domain names (e.g., `example.com` will be converted to `https://example.com`)
- **HTTP to HTTPS upgrade**: HTTP URLs are automatically upgraded to HTTPS for security
- **Better redirect handling**: Only allows redirects that add "www." to the hostname for security
- **Placeholder system**: URLs in content are replaced with placeholders during processing to avoid false matches

WebFetch Tool Updates

- Added guidance to prefer MCP-provided web fetch tools when available
- Updated security notes about URL validation
- Improved error messages for domain restrictions

### Technical Changes

️ Infrastructure Updates

- Added proper handling for Node.js inspector/debugger detection
- Improved telemetry for tracking migration success
- Better error handling in the initialization process
- Enhanced process exit handling with proper cleanup

Security Enhancements

- Stricter URL validation removing protocol restrictions (now accepts both HTTP and HTTPS)
- Better domain validation for web fetching
- Enhanced MCP server security with explicit user approval required

### Bug Fixes

- Fixed memory type selection UI to use proper dropdown components instead of manual navigation
- Improved error handling during local installation migration
- Better cleanup of interrupted processes

### Internal Changes

- Added new utility functions for stream handling (`sU4`, `IR4`, `ZR4`, `WR4`)
- Improved partition utility with `JR4` for array splitting
- Enhanced token counting with `eO2` function
- Better component organization with dedicated UI components for MCP approval