diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1a9145e..56848a1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,14 +8,54 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- Contributing keeper agent for maintaining CONTRIBUTING.md files
-- Agent definitions following Keep a Contributing-File format
-- Integration with PythonVibes best practices for Python repositories
+- **Complete hybrid agent distribution system** with AgentRegistry, AgentInstaller, and ProjectInitializer
+- **CLI tool `kaizen-agentic`** with comprehensive command interface for agent management
+- **Agent registry and installer functionality** for discovering, installing, and managing agents across projects
+- **Project templates system** with python-basic, python-web, python-cli, python-data, and comprehensive templates
+- **Agent categorization system** (project-management, development-process, code-quality, documentation, testing)
+- **Dependency resolution and validation** with safety measures and backup/rollback support
+- **Console script entry point** making kaizen-agentic command available globally after pip install
+- **Context manifest system** with external documentation references (ContextManifest.md)
+- **Reference documentation** for Keep a Contributing-File V0.0.1 and Keep a Todofile V0.0.1 formats
+- **PythonVibes integration** with Python project best practices reference
+- **Comprehensive CLI commands**:
+  - `kaizen-agentic init` - Initialize new projects with agents
+  - `kaizen-agentic install/update/remove` - Manage agents in existing projects
+  - `kaizen-agentic list/status/validate` - Discovery and maintenance operations
+  - `kaizen-agentic templates` - Project template management
+- **Integrated Makefile targets** for agent management (agents-list, agents-update, agents-validate, agents-status)
+- **Automatic Claude Code configuration** updates via CLAUDE.md integration
+- **Comprehensive documentation**:
+  - GETTING_STARTED.md - Complete setup and usage guide
+  - AGENT_DISTRIBUTION.md - Agent distribution system architecture
+  - CLI_CHEAT_SHEET.md - Quick reference for all CLI commands
+- **Multi-language build system integration** examples and patterns
+- **Complete test coverage** for all distribution system components
+- **Package data distribution** with all agents included in pip-installable package
 
 ### Changed
-- Refactored CONTRIBUTING.md to follow Keep a Contributing-File V0.0.1 format
-- Streamlined contribution guidelines with welcoming tone and clear setup instructions
-- Updated agent specifications to align with official documentation standards
+- **Makefile target reorganization** with consistent naming conventions:
+  - Agent management targets now use `agents-` prefix (agents-list, agents-update, agents-validate)
+  - Setup targets maintain `setup-` prefix for consistency
+  - Standards targets use `standards-` prefix (standards-check, standards-fix, standards-test)
+- **Enhanced dependency management** with YAML frontmatter support and precise reference detection
+- **Improved backup and safety systems** with microsecond timestamps and collision prevention
+- **Updated agent definitions** to align with official documentation standards and distribution requirements
+- **Streamlined Makefile structure** with visual section separators and clear help documentation
+- **Agent repository consolidation** removing duplicates and focusing on comprehensive implementations
+
+### Fixed
+- **All flake8 violations** across the entire codebase for PEP 8 compliance
+- **Test reliability issues** with backup directory collision prevention
+- **Dependency detection accuracy** with more precise agent reference detection
+- **Code style compliance**:
+  - Line length violations with appropriate line breaks
+  - Unused imports and variables removal
+  - F-string usage corrections
+  - Import organization and newline standardization
+- **Test suite stability** with all 24 tests now passing consistently
+- **Validation error reporting** improvements for better debugging
+- **Virtual environment setup** reliability issues on fresh repositories
 
 ## [0.1.0] - 2025-10-18