Deterministic AI Systems with Rule-Based Validation and RoutingDeterministic AI Systems with Rule-Based Validation and Routing
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The rule behind everything we build.
Every system I build follows one rule: the model reads or talks, and code decides. In Docket (invoice intake), a value only turns green when it's found on the page and passes every check in code: arithmetic, VAT, IBAN, and ABA routing checksums for US invoices. In Dossier (forged documents), the outcome comes from versioned rules, never from the model. In Front Desk (AI receptionist), a deterministic TypeScript policy gate decides the lead route, and hours and prices come from configuration rather than from the model. When a model is unsure or a provider is down, the system says so and hands the case to a person instead of guessing. We fail closed on money and fail open on anything optional. Stack: Python, FastAPI, PostgreSQL/pgvector, Next.js, n8n, Docker. adaptivesystems.dev
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Creatives on Contra have earned over $150M and we are just getting started