diff --git a/bunfig.toml b/bunfig.toml
deleted file mode 100644
index cd45629..0000000
--- a/bunfig.toml
+++ /dev/null
@@ -1,2 +0,0 @@
-[test]
-root = "src"
diff --git a/e2e/live.test.ts b/e2e/live.test.ts
new file mode 100644
index 0000000..13e9bce
--- /dev/null
+++ b/e2e/live.test.ts
@@ -0,0 +1,73 @@
+// Live calls against the ChatGPT Codex backend. Opt in by setting both
+// CODEX_LIVE_ACCESS_TOKEN (a "Login with ChatGPT" access token) and
+// CODEX_LIVE_ACCOUNT_ID. CODEX_LIVE_MODEL is optional.
+
+import { describe, expect, test } from "bun:test";
+import { createDefaultScheduler, runInference } from "@intx/inference";
+import type { InferenceEvent, InferenceSource } from "@intx/types/runtime";
+import {
+  CODEX_ACCOUNT_ID_OPTION,
+  CODEX_BASE_URL,
+  CODEX_PROVIDER,
+  createCodexResponsesAdapter,
+  withCodexContentTypeRepair,
+} from "../src/index";
+
+const accessToken = process.env["CODEX_LIVE_ACCESS_TOKEN"] ?? "";
+const accountId = process.env["CODEX_LIVE_ACCOUNT_ID"] ?? "";
+const model = process.env["CODEX_LIVE_MODEL"] ?? "gpt-5.5";
+
+const source: InferenceSource = {
+  id: `codex:${model}`,
+  provider: CODEX_PROVIDER,
+  baseURL: CODEX_BASE_URL,
+  credentialId: "codex",
+  model,
+  quirks: { productName: "Corbits Live Test", environmentTagName: "live_test" },
+};
+
+const deps = {
+  fetch: withCodexContentTypeRepair(fetch),
+  scheduler: createDefaultScheduler(),
+  adapters: {
+    has: (provider: string) => provider === CODEX_PROVIDER,
+    resolve: createCodexResponsesAdapter,
+  },
+};
+
+describe.skipIf(accessToken === "" || accountId === "")(
+  "live Codex backend",
+  () => {
+    test("streams a text turn", async () => {
+      let seq = 0;
+      const events: InferenceEvent[] = [];
+      for await (const ev of runInference({
+        turns: [
+          {
+            role: "user",
+            timestamp: 0,
+            content: [{ type: "text", text: "Reply with the word pong." }],
+          },
+        ],
+        source,
+        inferenceOptions: {
+          systemPrompt: "Answer in one word.",
+          providerOptions: { [CODEX_ACCOUNT_ID_OPTION]: accountId },
+        },
+        nextSeq: () => seq++,
+        readMaterial: () => ({ secret: accessToken }),
+        deps,
+      }))
+        events.push(ev);
+      const done = events.find((e) => e.type === "inference.done");
+      if (done?.type !== "inference.done")
+        throw new Error(
+          `expected inference.done, got ${JSON.stringify(events)}`,
+        );
+      const text = done.data.turn.content.find((b) => b.type === "text");
+      expect(text?.type === "text" && text.text.toLowerCase()).toContain(
+        "pong",
+      );
+    }, 60_000);
+  },
+);
diff --git a/package.json b/package.json
index 1280305..30fd168 100644
--- a/package.json
+++ b/package.json
@@ -29,8 +29,9 @@
     "lint": "eslint .",
     "format": "prettier --write .",
     "format:check": "prettier --check .",
-    "test": "bun test",
-    "check": "bun run typecheck && bun run lint && bun run format:check && bun run test"
+    "test": "bun test src",
+    "check": "bun run typecheck && bun run lint && bun run format:check && bun run test",
+    "test:e2e": "bun test e2e"
   },
   "dependencies": {
     "arktype": "^2.2.3"
diff --git a/tsconfig.json b/tsconfig.json
index d585bb9..b883ac9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -18,5 +18,5 @@
     "lib": ["ESNext"],
     "types": ["bun"]
   },
-  "include": ["src"]
+  "include": ["src", "e2e"]
 }