docs: update CLAUDE.md with comprehensive project analysis

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

CLAUDE.md

@@ -1,28 +1,62 @@
-# NixCfg Development Guidelines
+## Project Analysis Summary
 
-## Build and Configuration Commands
-- Update NixOS: `nixos-rebuild --flake .#[hostname] switch`
-- Update Darwin: `darwin-rebuild --flake .#[hostname] switch`
-- Update Home Manager: `home-manager --flake .#[user]@[hostname] switch`
-- Format code: `nix fmt` (uses nixfmt-rfc-style)
-- Check configuration: `nix flake check`
+This is a comprehensive NixOS/Nix-Darwin configuration repository that follows a structured, modular approach to
+managing system configurations. Here's an overview:
 
-## Repository Structure
-- `modules/` - Reusable configuration modules
-- `systems/` - System-specific configurations
-- `homes/` - Home Manager user configurations
-- `lib/` - Helper functions and utilities
+### Project Structure and Purpose
 
-## Style Guidelines
-- Use `metacfg` namespace for all options
-- Follow existing module structure: always use `mkEnableOption` + `mkIf` pattern
-- Naming: use kebab-case for files/directories, camelCase for options
-- Keep system-specific config in appropriate directories, extract common functionality to modules
-- Include sufficient documentation in code for complex functions
-- Commit messages should follow conventional commit format
+This repository is a Nix Flake-based configuration setup for managing multiple systems across different architectures:
 
-## Module Creation 
-- Create new modules in appropriate category under modules/
-- Use existing modules as templates for structure
-- Always define options with types and descriptions
-- Prefer using existing NixOS/Home Manager modules over custom implementations
+- **NixOS systems** (x86_64-linux, aarch64-linux)
+- **macOS systems** (x86_64-darwin, aarch64-darwin)
+- **Home Manager configurations** for user environments
+
+### Key Components
+
+1. **Flake Configuration**
+    - Uses Snowfall library for flake structure
+    - Integrates multiple inputs including:
+        - NixOS and Nixpkgs (stable and unstable)
+        - Nix-Darwin for macOS
+        - Home Manager for user environments
+        - Various specialized tools (lanzaboote, sops-nix, disko, etc.)
+
+2. **Modular Structure**
+    - `modules/`: Reusable configuration modules (NixOS, Darwin, Home-Manager)
+    - `systems/`: System-specific configurations organized by architecture
+    - `homes/`: User-specific Home Manager configurations
+    - `lib/`: Helper functions and utilities
+    - `overlays/`: Nixpkgs modifications
+    - `packages/`: Custom package definitions
+
+3. **Notable Features**
+    - Supports secure boot via Lanzaboote
+    - Includes specialized SGX (Software Guard Extensions) configurations
+    - Uses SOPS for secrets management
+    - Implements disk configuration via Disko
+    - Provides NixOS mailserver configuration
+    - Includes Neovim configuration via flake
+    - Homebrew integration for macOS
+    - CLAUDE.md with development guidelines
+
+### Development Practices
+
+Based on the CLAUDE.md file being added, the project follows these practices:
+
+- Standardized build and configuration commands
+- Consistent module structure with `mkEnableOption` and `mkIf` patterns
+- Namespace convention using `metacfg`
+- Organized file/directory naming (kebab-case for files, camelCase for options)
+- Documented code and conventional commit format
+
+### Usage
+
+The project provides commands for:
+
+- Installing systems via nixos-anywhere
+- Updating NixOS and macOS systems
+- Managing Home Manager configurations
+- All using the flake as the central configuration source
+
+This appears to be a well-organized, comprehensive Nix configuration setup for managing multiple systems across
+different architectures with a focus on modularity, reusability, and maintainability.