Restructured AGENTS.md to follow OpenAI Codex guidelines:
- Added "Dev Environment" section (recommended by OpenAI)
- Added "Project Standards" with security requirements
- Added "Testing" section with verification steps
- Simplified troubleshooting section
- Removed non-existent slash commands (/scan, /install-tools)
- Removed hardcoded version number
- Made content project-focused instead of MEDUSA documentation

Based on: https://developers.openai.com/codex/guides/agents-md/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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