Open-Source AI Agent Uses Deterministic Code to Stop SLM Hallucinations in Billing

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A developer has open-sourced a local-first AI agent architecture called closed-loop-slm-agent, built around Meta's Llama 3.2 3B model, designed to eliminate hallucinations in high-stakes business workflows like invoicing and ledger billing. The system strictly separates responsibilities: the small language model handles only prose generation, while deterministic Python code owns all arithmetic, balance verification, and transaction matching. To avoid unreliable 'vibe-based' evaluations, the architecture uses Quadratic Weighted Kappa to calibrate AI judges for statistically sound output scoring. The agent also features explicit tri-state routing, allowing it to abstain or escalate to a human expert rather than guessing when data is ambiguous or missing. Human corrections are fed back into the system in-context, creating a continuous learning loop instead of letting operator edits go to waste.

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ProgrammingDEV Community ·

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