diff --git a/src/gdiffer/cli.py b/src/gdiffer/cli.py
index 4a31433..ac14a12 100644
--- a/src/gdiffer/cli.py
+++ b/src/gdiffer/cli.py
@@ -1,291 +1 @@
-"""CLI interface for git diff explainer."""
-
-import json
-import sys
-from typing import Optional
-
-import click
-
-from gdiffer import __version__
-from gdiffer.code_analyzer import CodeAnalyzer
-from gdiffer.issue_detector import IssueDetector
-from gdiffer.language_detector import LanguageDetector
-from gdiffer.models import DiffAnalysis, DiffFile
-from gdiffer.output import OutputFormatter, OutputFormat
-from gdiffer.parser import parse_diff
-
-
-def create_analysis(files: list[DiffFile], verbose: bool = False) -> DiffAnalysis:
-    analysis = DiffAnalysis()
-    language_detector = LanguageDetector()
-    code_analyzer = CodeAnalyzer()
-    issue_detector = IssueDetector()
-
-    for file_obj in files:
-        analysis.files.append(file_obj)
-
-        if file_obj.change_type == "add":
-            analysis.files_added += 1
-        elif file_obj.change_type == "delete":
-            analysis.files_deleted += 1
-        elif file_obj.change_type == "rename":
-            analysis.files_renamed += 1
-        else:
-            analysis.files_modified += 1
-
-        lang = language_detector.detect(file_obj.filename)
-        if lang != "text":
-            analysis.language_breakdown[lang] = analysis.language_breakdown.get(lang, 0) + 1
-
-        for hunk in file_obj.hunks:
-            old_code = '\n'.join(hunk.old_lines_content)
-            new_code = '\n'.join(hunk.new_lines_content)
-
-            summary = code_analyzer.summarize_change(old_code, new_code, lang)
-
-            issues = issue_detector.detect_diff_issues(old_code, new_code, lang)
-            for issue in issues:
-                issue_dict = {
-                    'type': issue.type,
-                    'severity': issue.severity,
-                    'title': issue.title,
-                    'description': issue.description,
-                    'line': issue.line,
-                    'suggestion': issue.suggestion,
-                    'file': file_obj.filename,
-                }
-                analysis.all_issues.append(issue_dict)
-
-            suggestions = issue_detector.suggest_improvements(new_code, lang)
-            analysis.all_suggestions.extend(suggestions)
-
-            analysis.total_changes += hunk.new_lines
-
-    analysis.total_files = len(files)
-
-    return analysis
-
-
-@click.group()
-@click.version_option(version=__version__)
-@click.option('--verbose', '-v', is_flag=True, help='Enable verbose output')
-@click.option('--output', '-o', type=click.Choice(['terminal', 'json', 'plain']),
-              default='terminal', help='Output format')
-@click.pass_context
-def main(ctx: click.Context, verbose: bool, output: str):
-    ctx.ensure_object(dict)
-    ctx.obj['verbose'] = verbose
-    ctx.obj['output'] = output
-
-
-@main.command()
-@click.argument('diff_input', type=click.STRING, required=False)
-@click.option('--file', '-f', type=click.Path(exists=True), help='Read diff from file')
-@click.option('--stdin', '-s', is_flag=True, help='Read diff from stdin')
-@click.pass_context
-def explain(ctx: click.Context, diff_input: Optional[str], file: Optional[str], stdin: bool):
-    verbose = ctx.obj.get('verbose', False)
-    output_format = ctx.obj.get('output', 'terminal')
-
-    diff_content = ""
-
-    if stdin:
-        diff_content = sys.stdin.read()
-    elif file:
-        with open(file, 'r') as f:
-            diff_content = f.read()
-    elif diff_input:
-        diff_content = diff_input
-    else:
-        click.echo("No diff provided. Use --stdin, --file, or pass diff as argument.", err=True)
-        sys.exit(1)
-
-    try:
-        files = parse_diff(diff_content)
-
-        if not files:
-            click.echo("No valid diff files found. Please provide a valid git diff.", err=True)
-            sys.exit(1)
-
-        analysis = create_analysis(files, verbose)
-
-        if output_format == 'json':
-            result = format_analysis_json(analysis)
-            click.echo(result)
-        else:
-            formatter = OutputFormatter(OutputFormat(output_format))
-            formatter.print_analysis(analysis)
-
-    except Exception as e:
-        click.echo(f"Error analyzing diff: {e}", err=True)
-        if verbose:
-            import traceback
-            traceback.print_exc()
-        sys.exit(1)
-
-
-@main.command()
-@click.option('--file', '-f', type=click.Path(exists=True), help='Read diff from file')
-@click.option('--stdin', '-s', is_flag=True, help='Read diff from stdin')
-@click.pass_context
-def issues(ctx: click.Context, file: Optional[str], stdin: bool):
-    diff_content = ""
-
-    if stdin:
-        diff_content = sys.stdin.read()
-    elif file:
-        with open(file, 'r') as f:
-            diff_content = f.read()
-    else:
-        diff_content = sys.stdin.read()
-
-    if not diff_content.strip():
-        click.echo("No diff provided.", err=True)
-        sys.exit(1)
-
-    try:
-        files = parse_diff(diff_content)
-
-        issue_detector = IssueDetector()
-        all_issues = []
-
-        for file_obj in files:
-            for hunk in file_obj.hunks:
-                old_code = '\n'.join(hunk.old_lines_content)
-                new_code = '\n'.join(hunk.new_lines_content)
-                lang = LanguageDetector().detect(file_obj.filename)
-
-                issues = issue_detector.detect_diff_issues(old_code, new_code, lang)
-                for issue in issues:
-                    all_issues.append({
-                        'file': file_obj.filename,
-                        'line': issue.line,
-                        'severity': issue.severity,
-                        'title': issue.title,
-                        'description': issue.description,
-                        'suggestion': issue.suggestion,
-                    })
-
-        if all_issues:
-            severity_priority = {'critical': 0, 'high': 1, 'medium': 2, 'low': 3}
-            all_issues.sort(key=lambda x: severity_priority.get(x.get('severity', ''), 4))
-
-            if ctx.obj.get('output') == 'json':
-                click.echo(json.dumps(all_issues, indent=2))
-            else:
-                for issue in all_issues:
-                    color = {'critical': 'red', 'high': 'orange3', 'medium': 'yellow', 'low': 'cyan'}.get(
-                        issue['severity'], 'white'
-                    )
-                    click.echo(f"[{color}][{issue['severity'].upper()}][/] {issue['title']}")
-                    click.echo(f"  File: {issue['file']}:{issue['line']}")
-                    click.echo(f"  {issue['description']}")
-                    click.echo(f"  Suggestion: {issue['suggestion']}")
-                    click.echo()
-        else:
-            click.echo("No issues detected in the diff.")
-
-    except Exception as e:
-        click.echo(f"Error analyzing issues: {e}", err=True)
-        sys.exit(1)
-
-
-@main.command()
-@click.option('--file', '-f', type=click.Path(exists=True), help='Read diff from file')
-@click.option('--stdin', '-s', is_flag=True, help='Read diff from stdin')
-@click.pass_context
-def summarize(ctx: click.Context, file: Optional[str], stdin: bool):
-    diff_content = ""
-
-    if stdin:
-        diff_content = sys.stdin.read()
-    elif file:
-        with open(file, 'r') as f:
-            diff_content = f.read()
-    else:
-        diff_content = sys.stdin.read()
-
-    if not diff_content.strip():
-        click.echo("No diff provided.", err=True)
-        sys.exit(1)
-
-    try:
-        files = parse_diff(diff_content)
-
-        if not files:
-            click.echo("No valid diff files found.")
-            sys.exit(1)
-
-        analysis = create_analysis(files)
-
-        click.echo(f"Files changed: {analysis.total_files}")
-        click.echo(f"  Added: {analysis.files_added}")
-        click.echo(f"  Deleted: {analysis.files_deleted}")
-        click.echo(f"  Modified: {analysis.files_modified}")
-        click.echo(f"  Renamed: {analysis.files_renamed}")
-        click.echo(f"Total changes: {analysis.total_changes}")
-
-        if analysis.language_breakdown:
-            click.echo("\nLanguages:")
-            for lang, count in sorted(analysis.language_breakdown.items()):
-                click.echo(f"  - {lang}: {count} files")
-
-        if analysis.all_issues:
-            critical = sum(1 for i in analysis.all_issues if i.get('severity') == 'critical')
-            high = sum(1 for i in analysis.all_issues if i.get('severity') == 'high')
-            medium = sum(1 for i in analysis.all_issues if i.get('severity') == 'medium')
-            low = sum(1 for i in analysis.all_issues if i.get('severity') == 'low')
-
-            click.echo(f"\nIssues found: {len(analysis.all_issues)}")
-            if critical:
-                click.echo(f"  Critical: {critical}")
-            if high:
-                click.echo(f"  High: {high}")
-            if medium:
-                click.echo(f"  Medium: {medium}")
-            if low:
-                click.echo(f"  Low: {low}")
-
-    except Exception as e:
-        click.echo(f"Error summarizing diff: {e}", err=True)
-        sys.exit(1)
-
-
-def format_analysis_json(analysis: DiffAnalysis) -> str:
-    result = {
-        'summary': {
-            'total_files': analysis.total_files,
-            'files_added': analysis.files_added,
-            'files_deleted': analysis.files_deleted,
-            'files_modified': analysis.files_modified,
-            'files_renamed': analysis.files_renamed,
-            'total_changes': analysis.total_changes,
-            'language_breakdown': analysis.language_breakdown,
-        },
-        'files': [],
-        'issues': analysis.all_issues,
-        'suggestions': analysis.all_suggestions,
-    }
-
-    for file_obj in analysis.files:
-        file_data = {
-            'filename': file_obj.filename,
-            'change_type': file_obj.change_type,
-            'language': file_obj.extension,
-            'hunks': [],
-        }
-
-        for hunk in file_obj.hunks:
-            hunk_data = {
-                'old_start': hunk.old_start,
-                'new_start': hunk.new_start,
-                'changes': {
-                    'added': hunk.get_added_lines(),
-                    'removed': hunk.get_removed_lines(),
-                },
-            }
-            file_data['hunks'].append(hunk_data)
-
-        result['files'].append(file_data)
-
-    return json.dumps(result, indent=2)
+# src/gdiffer/cli.py