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You can't prompt hallucinations away — you engineer around them. Five layers: RAG grounding, constrained output, checkable citations, a measured eval set, and confidence routing. The target isn't 0% errors — it's a known error rate with graceful failure.

Custom web application development in Germany: internal tools run €15,000–€40,000, customer portals €30,000–€80,000, complex platforms €80,000–€250,000+. The price drivers are user roles, ERP/CRM integrations, compliance and data migration — not the number of screens.

Most agency projects end with a code dump and 'good luck.' We publish our actual handoff process — ADRs, walkthrough recordings, living documentation — so your team doesn't lose 3 months.