07 / SYSTEM2026
AI Accounts Payable Agent
Multi-agent invoice-processing pipeline
Six agents, three safety gates, seven passing tests.
SYSTEM SHEET
- PATTERN
- Supervisor / worker — one orchestrator routing six specialized agents
- SAFETY
- Three hard gates between an invoice arriving and money moving
- API
- FastAPI REST endpoint wrapping the whole pipeline
- TESTS
- 7/7 pytest — the pipeline is exercised end to end, not vibes-checked
- STACK
- LangGraph + GPT-4o
MY SCOPE
- Supervisor/worker LangGraph graph — six specialized agents
- Three-gate safety design between invoice and payment
- FastAPI endpoint + end-to-end pytest suite (integrated GPT-4o)