fix: show clear error when Cloudflare provider env vars are missing (#20399)

Co-authored-by: Aiden Cline <63023139+rekram1-node@users.noreply.github.com>
Co-authored-by: Aiden Cline <aidenpcline@gmail.com>

packages/opencode/src/plugin/index.ts

@@ -10,6 +10,7 @@ import { NamedError } from "@opencode-ai/util/error"
 import { CopilotAuthPlugin } from "./github-copilot/copilot"
 import { gitlabAuthPlugin as GitlabAuthPlugin } from "opencode-gitlab-auth"
 import { PoeAuthPlugin } from "opencode-poe-auth"
+import { CloudflareAIGatewayAuthPlugin, CloudflareWorkersAuthPlugin } from "./cloudflare"
 import { Effect, Layer, ServiceMap, Stream } from "effect"
 import { InstanceState } from "@/effect/instance-state"
 import { makeRuntime } from "@/effect/run-service"
@@ -46,7 +47,14 @@ export namespace Plugin {
   export class Service extends ServiceMap.Service<Service, Interface>()("@opencode/Plugin") {}
 
   // Built-in plugins that are directly imported (not installed from npm)
-  const INTERNAL_PLUGINS: PluginInstance[] = [CodexAuthPlugin, CopilotAuthPlugin, GitlabAuthPlugin, PoeAuthPlugin]
+  const INTERNAL_PLUGINS: PluginInstance[] = [
+    CodexAuthPlugin,
+    CopilotAuthPlugin,
+    GitlabAuthPlugin,
+    PoeAuthPlugin,
+    CloudflareWorkersAuthPlugin,
+    CloudflareAIGatewayAuthPlugin,
+  ]
 
   function isServerPlugin(value: unknown): value is PluginInstance {
     return typeof value === "function"