core: expose v2 model listing API (#25821)

packages/core/src/plugin/env.ts

@@ -0,0 +1,18 @@
+import { Effect } from "effect"
+import { PluginV2 } from "../plugin"
+
+export const EnvPlugin = PluginV2.define({
+  id: PluginV2.ID.make("env"),
+  effect: Effect.gen(function* () {
+    return {
+      "provider.update": Effect.fn(function* (evt) {
+        const key = evt.provider.env.find((item) => process.env[item])
+        if (!key) return
+        evt.provider.enabled = {
+          via: "env",
+          name: key,
+        }
+      }),
+    }
+  }),
+})