- Add g_last_error package variable matching PACK_JSON/PACK_IMPORT_COMENZI pattern - Implement get_last_error() and clear_error() functions for VFP orchestrator integration - Replace exceptions with error storage in validation and main functions - Return -1 on errors instead of raising exceptions for deferred error handling - Enable orchestrator to read errors before deciding when to log them 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>