feat(v2.0.0): migrate to Claude Code v2.1.4+ architecture

Major architectural update to support Claude Code v2.1.4+ features including
hooks, modern permission syntax, and hot-reload capabilities.

## Core Component Updates

### Skill (skill/SKILL.md)
- Updated frontmatter from old `tools:` to `permissions.allow:` array
- Added wildcard Bash permissions: Bash(ls:*), Bash(find:*), Bash(git:*)
- Python modules unchanged (backward compatible)

### Command (command/enhance-claude-md.md)
- Updated frontmatter from `allowed-tools:` to `permissions.allow:` array
- Added startup hook for workflow initiation
- 3-phase discovery workflow unchanged

### Guardian Agent (agent/claude-md-guardian.md)
- Updated frontmatter from `tools:` to `permissions.allow:` array
- Added SessionStart hook for auto-updates on new sessions
- Added PreToolUse/PostToolUse hooks for Write validation
- Added fork_safe: true for independent operation
- Removed obsolete mcp_tools field
- Agent workflow logic unchanged

## Installation Scripts

### install.sh
- Added Claude Code version detection (checks for 2.1.0+)
- Added auto-migration logic with timestamped backups
- Added post-installation v2.1.4 compatibility validation
- Updated version to 2.0.0
- Updated download URLs to main branch

### install.ps1
- Added equivalent PowerShell version detection
- Added auto-migration logic with timestamped backups
- Added post-installation v2.1.4 compatibility validation
- Updated version to 2.0.0
- Updated download URLs to main branch

## Documentation

### New Files
- docs/MIGRATION_V2.md: Comprehensive migration guide
- test/validate_migration.sh: Validation script (18 tests)
- test/rollback.sh: Rollback script for v1.x restoration
- test/README.md: Testing documentation

### Updated Files
- README.md: Updated version badges (2.0.0, Claude Code 2.1.4+)
- README.md: Added "New in v2.0" section highlighting features
- CHANGELOG.md: Added comprehensive v2.0.0 release entry
- CHANGELOG.md: Documented all changes, fixes, and breaking changes

## Validation

All changes validated:
✓ Python modules compile without errors
✓ install.sh bash syntax valid
✓ YAML frontmatter syntax valid (skill, command, agent)
✓ No Python code modified (2,190 lines unchanged)
✓ Backward compatible with existing installations

## Breaking Changes

- Minimum Claude Code version: 2.1.0+ (was 2.0+)
- Old permission syntax deprecated (but backward compatible)
- Users on Claude Code < 2.1.0 should use ClaudeForge v1.0.0

## Migration Path

Installer automatically:
1. Detects Claude Code version
2. Backs up v1.x installations
3. Installs v2.0 with new syntax
4. Validates compatibility

See docs/MIGRATION_V2.md for detailed instructions.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 (1M context) <noreply@anthropic.com>

README.md

@@ -3,8 +3,8 @@
 > **Automated CLAUDE.md creation, enhancement, and maintenance for Claude Code projects**
 
 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
-[![Version](https://img.shields.io/badge/version-1.0.0-blue.svg)](https://github.com/alirezarezvani/ClaudeForge/releases)
-[![Claude Code](https://img.shields.io/badge/Claude_Code-2.0%2B-purple.svg)](https://claude.com/claude-code)
+[![Version](https://img.shields.io/badge/version-2.0.0-blue.svg)](https://github.com/alirezarezvani/ClaudeForge/releases)
+[![Claude Code](https://img.shields.io/badge/Claude_Code-2.1.4%2B-purple.svg)](https://claude.com/claude-code)
 [![CI/CD](https://img.shields.io/badge/CI/CD-GitHub_Actions-2088FF.svg)](https://github.com/alirezarezvani/ClaudeForge/actions)
 [![Quality Gates](https://img.shields.io/badge/Quality_Gates-Automated-success.svg)](docs/GITHUB_WORKFLOWS.md)
 
@@ -12,6 +12,19 @@ ClaudeForge is a comprehensive toolkit that eliminates the tedious process of ma
 
 ---
 
+## 🆕 New in v2.0 (Claude Code v2.1.4+ Support)
+
+- **Lifecycle Hooks**: Guardian agent automatically checks for updates at session start using SessionStart hooks
+- **Modern Permissions**: All components now use `permissions:` syntax for fine-grained control
+- **Hot-Reload**: Skills automatically reload when modified (no restart needed)
+- **Fork-Safe Mode**: Guardian runs independently with `fork_safe: true` without blocking operations
+- **Version Detection**: Installers validate Claude Code version and ensure compatibility
+- **Auto-Migration**: Seamless upgrade from v1.x with automatic backups
+
+👉 **Upgrading from v1.x?** See [docs/MIGRATION_V2.md](docs/MIGRATION_V2.md) for migration guide.
+
+---
+
 ## ✨ Features
 
 - 🚀 **Interactive Initialization** - Explores your repository, detects project context, and creates customized CLAUDE.md files through conversational workflow