---
name: "tech-flue-register-in-initializer"
title: "Flue: register providers in initializer"
description: "Custom gateways must register from agent init with ctx.env; module load has empty env"
type: "tech"
category: "agents"
tags: ["tech", "llm-agents", "cloudflare"]
related: ["[[reference-cloudflare-acquires-astro]]", "[[project-anyrouter]]", "[[tech-cloudflare-ai-gateway-transparent]]"]
---
Flue addresses models as `provider/model`. Register custom providers inside `defineAgent` initializer using `ctx.env`.

`process.env` is empty at module load on workerd. Debug with Node target when errors hide. Related: [[reference-cloudflare-acquires-astro]], [[project-anyrouter]].