Hallucinated model name in codebase caught six days before deploy
A developer found 'gemini-3.6-flash' sitting in their gateway config — a model name that never existed, likely invented by an AI-assisted edit — with all 130 tests passing and a model-family shutdown deadline six days out. The thread's practical takeaway: gateways should validate model names against the provider's catalog at startup and refuse to boot on unknown names.