AI_TOOL_USAGE.md

ParcelPilot AI System — AI Tool Usage

1. AI Coding Tools Used

• Antigravity AI Assistant (Powered by Gemini 3.6 Flash): Used end-to-end for architecture design, document parsing, backend Python implementation, test suite generation, and frontend styling.

2. How Tools Were Applied

1. Data Pack Extraction: Automated parsing of PDF files (pypdf) and Excel workbook structures (openpyxl/pandas).
2. Core System Implementation: Engineered the FastAPI backend, security access control layer (security.py), document authority matrix (document_indexer.py), tool suite (tools.py), agent reasoning engine (agent_engine.py), and proactive issue detector (proactive_detector.py).
3. Frontend UI Development: Built a sleek dark-mode glassmorphism Web Application (index.html, styles.css, app.js) featuring interactive context switching, step-by-step tool execution traces, human-in-the-loop confirmation modals, and proactive issue dashboards.
4. Automated Verification: Created a 100% passing test suite (tests/test_suite.py) validating security isolation, contract overrides, SLA breaches, and state-changing action workflows.