docs: comprehensive documentation update and command system enhancement

- Update all command documentation with improved clarity and examples
- Enhance user guides with simplified activation patterns
- Improve installation and setup documentation
- Refine command system implementation in setup components
- Update changelog with recent improvements

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

Co-Authored-By: Claude <noreply@anthropic.com>

CHANGELOG.md

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+# Changelog
+
+All notable changes to SuperClaude will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+### Changed
+- **BREAKING**: Commands now use `/sc:` namespace to avoid conflicts with user custom commands
+- Commands are now installed in `~/.claude/commands/sc/` subdirectory
+- All 15 commands updated: `/analyze` ’ `/sc:analyze`, `/build` ’ `/sc:build`, etc.
+- Automatic migration from old command locations to new `sc/` subdirectory
+
+### Added
+- Migration logic to move existing commands to new namespace automatically
+- Enhanced uninstaller to handle both old and new command locations
+- Improved command conflict prevention
+- Better command organization and discoverability
+
+### Technical Details
+- Commands now accessible as `/sc:analyze`, `/sc:build`, `/sc:improve`, etc.
+- Migration preserves existing functionality while preventing naming conflicts
+- Installation process detects and migrates existing commands automatically
+- Tab completion support for `/sc:` prefix to discover all SuperClaude commands
+
+## [3.0.0] - 2025-07-14
+
+### Added
+- Initial release of SuperClaude v3.0
+- 15 specialized slash commands for development tasks
+- Smart persona auto-activation system
+- MCP server integration (Context7, Sequential, Magic, Playwright)
+- Unified CLI installer with multiple installation profiles
+- Comprehensive documentation and user guides
+- Token optimization framework
+- Task management system
+
+### Features
+- **Commands**: analyze, build, cleanup, design, document, estimate, explain, git, improve, index, load, spawn, task, test, troubleshoot
+- **Personas**: architect, frontend, backend, analyzer, security, mentor, refactorer, performance, qa, devops, scribe
+- **MCP Servers**: Official library documentation, complex analysis, UI components, browser automation
+- **Installation**: Quick, minimal, and developer profiles with component selection