feat: CLAUDE.md 파일을 추가하다

- 지금 상태를 저장해놓음.

Author: ujuc

CLAUDE.md

@@ -0,0 +1,60 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with
+code in this repository.
+
+## Project Overview
+
+This is a Korean personal blog powered by Pelican (static site generator) with a
+custom CLI tool for content management. The blog uses a custom "clean" theme and
+supports both Markdown and reStructuredText content.
+
+## Common Commands
+
+### Blog Management
+
+- `uv run cli post <TITLE>` - Create a new blog post with proper metadata
+  template
+- `uv run cli preview` - Start development server with auto-reload (
+  `pelican --autoreload --listen`)
+- `uv run cli build` - Build site for production using publishconf.py
+- `uv run cli clean` - Clean output directory and cache files
+
+### Package Management
+
+- `uv sync` - Install dependencies from uv.lock
+- `uv add <package>` - Add new dependency
+
+## Architecture
+
+### Content Structure
+
+- Blog posts are stored in `content/blog/YYYY/` directories
+- Posts use Pelican metadata format with Title, Date, Category, Tags, Slug,
+  Summary
+- Images are organized in `content/img/YYYY/` matching post dates
+- Content supports both Markdown (.md) and reStructuredText (.rst)
+
+### CLI Tool (`cli/main.py`)
+
+- Built with Cleo framework for command-line interface
+- PostCmd: Generates post templates with Korean slug support
+- PreviewCmd: Wrapper for Pelican development server
+- BuildCmd: Production build using publishconf.py settings
+- CleanCmd: Cleanup utility for output and cache directories
+
+### Configuration
+
+- `pelicanconf.py`: Development configuration with relative URLs
+- `publishconf.py`: Production configuration with absolute URLs, analytics, and
+  feeds
+- Uses custom "clean" theme located in `clean/` directory
+- Markdown extensions include mermaidjs, toc, codehilite, and more
+
+### Key Features
+
+- Korean language support with proper timezone (Asia/Seoul)
+- Mermaid.js integration for diagrams
+- Multiple comment systems (Utterances, Giscus)
+- Google Analytics and AdSense integration in production
+- Buy Me a Coffee integration