X_AI_GATEWAY_MISSING
Means
an llm() action ran with no gateway installed
Typical cause
no aiGateway in apps/<app>/runtime.ts
Fix
apps/<app>/runtime.ts: export const runtime = { aiGateway: providerGateway({ providers: [provider] }) } — in a test, installAiGateway(gateway) from @ultimat3/ai/adapter — any provider: the Anthropic format, the OpenAI format (any compatible server), or your own