diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 185a165..f97f0a1 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node: [18, 20, 22]
+        node: [20, 22, 24]
     name: Node ${{ matrix.node }} test
     steps:
       - uses: actions/checkout@v4
diff --git a/CLAUDE.md b/CLAUDE.md
new file mode 100644
index 0000000..3950e65
--- /dev/null
+++ b/CLAUDE.md
@@ -0,0 +1,60 @@
+# CLAUDE.md
+
+This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
+
+## Commands
+
+### Development Commands
+- `npm run lint` - Run ESLint for code linting
+- `npm run lint:fix` - Run ESLint with automatic fixes
+- `npm run test` - Run Jest tests with experimental VM modules support
+
+### Testing the CLI Tool
+- `npx openapi-generate-html -i openapi.json` - Generate HTML from OpenAPI spec
+- `npx openapi-generate-html -i openapi.json --theme=dark` - Generate with dark theme
+- `npx openapi-generate-html -i openapi.json --ui=swagger --output=custom.html` - Generate with Swagger UI
+
+## Architecture
+
+This is a Node.js CLI tool that generates standalone HTML documentation from OpenAPI specifications. The tool creates self-contained HTML files with all assets embedded.
+
+### Core Components
+
+**Main Entry Point (`src/index.js`)**
+- CLI argument parsing using Commander.js
+- Interactive prompts using Inquirer.js
+- Three-phase workflow: get options → render HTML → write file
+
+**Template System (`resources/*/`)**
+- Three UI options: Stoplight Elements, Swagger UI, Redoc
+- Each UI has: `template.ejs`, `index.css`, `index.js`
+- Templates use EJS with embedded CSS/JS content and OpenAPI data
+
+**Validation (`src/utils/validate.js`)**
+- Input validation for CLI commands and interactive prompts
+- Supports JSON/YAML files and URLs
+- Enforces HTML output format
+
+**Constants (`src/constants/index.js`)**
+- UI types: `['stoplight', 'swagger', 'redoc']`
+- Themes: `['light', 'dark']`
+- File extensions: `['.json', '.yaml', '.yml']`
+
+### Key Processing Steps
+
+1. **Input Resolution**: Accepts file paths or URLs, validates format
+2. **$ref Resolution**: Uses `@apidevtools/json-schema-ref-parser` to bundle external references
+3. **Template Rendering**: EJS templates embed CSS, JS, and OpenAPI data into single HTML file
+4. **Output Generation**: Creates standalone HTML with no external dependencies
+
+### File Structure Logic
+
+- `src/index.js` - Main orchestration and rendering logic
+- `src/utils/validate.js` - All input validation functions
+- `src/constants/index.js` - Configuration constants
+- `resources/{ui}/` - UI-specific templates and assets
+- Tests are co-located with source files (e.g., `validate.test.js`)
+
+### Testing
+
+Uses Jest with ES modules (`--experimental-vm-modules` flag required). Tests focus on validation functions and CLI argument handling.
\ No newline at end of file
diff --git a/package-lock.json b/package-lock.json
index 49abf4b..62827c1 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "openapi-generate-html",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "openapi-generate-html",
-      "version": "0.5.2",
+      "version": "0.5.3",
       "license": "MIT",
       "dependencies": {
         "@apidevtools/json-schema-ref-parser": "^13.0.5",
diff --git a/package.json b/package.json
index 99da9df..d58a7b6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "openapi-generate-html",
-  "version": "0.5.2",
+  "version": "0.5.3",
   "description": "Generate standalone HTML from OpenAPI Specification",
   "type": "module",
   "bin": {
diff --git a/resources/common/index.css b/resources/common/index.css
index 2315f73..0adbe17 100644
--- a/resources/common/index.css
+++ b/resources/common/index.css
@@ -61,6 +61,9 @@
   display: flex;
   flex-direction: column;
   flex: 1;
+  word-break: break-all;
+  overflow-wrap: break-word;
+  white-space: normal;
 }
 
 .endpoint-path {