import json
import sys

def summarize_issues(input_file, output_file):
    with open(input_file, 'r') as f:
        issues = json.load(f)
        
    with open(output_file, 'w') as out:
        out.write("# Open Issues Summary\n\n")
        for i in issues:
            out.write(f"## Issue #{i['number']}: {i['title']}\n")
            # Truncate body if it's too long
            body = i.get('body', '') or ''
            if len(body) > 500:
                body = body[:500] + "...\n(truncated)"
            out.write(f"{body}\n\n---\n")

if __name__ == "__main__":
    summarize_issues("all_issues.json", "issue_summary.md")