diff --git a/e2e/local/cli-telemetry-optout.test.ts b/e2e/local/cli-telemetry-optout.test.ts
new file mode 100644
index 000000000..441d735f5
--- /dev/null
+++ b/e2e/local/cli-telemetry-optout.test.ts
@@ -0,0 +1,27 @@
+import { expect, it } from "@effect/vitest";
+import { Effect } from "effect";
+
+import { makeCliSurface } from "../src/surfaces/cli";
+
+it.live("terminal E2E sessions force product telemetry off", () =>
+  makeCliSurface()
+    .session(
+      [
+        process.execPath,
+        "-e",
+        "console.log([process.env.DO_NOT_TRACK, process.env.EXECUTOR_DISABLE_ANALYTICS, process.env.EXECUTOR_DISABLE_INTEGRATIONS_FETCH].join('|'))",
+      ],
+      (terminal) =>
+        terminal.screen
+          .waitUntil((screen) => screen.text.includes("1|1|1"), { timeoutMs: 5_000 })
+          .then((screen) => expect(screen.text).toContain("1|1|1")),
+      {
+        env: {
+          DO_NOT_TRACK: "0",
+          EXECUTOR_DISABLE_ANALYTICS: "0",
+          EXECUTOR_DISABLE_INTEGRATIONS_FETCH: "0",
+        },
+      },
+    )
+    .pipe(Effect.timeout("10 seconds")),
+);
diff --git a/e2e/src/surfaces/cli.ts b/e2e/src/surfaces/cli.ts
index ac7161883..85c0a9325 100644
--- a/e2e/src/surfaces/cli.ts
+++ b/e2e/src/surfaces/cli.ts
@@ -32,6 +32,15 @@ interface AsciicastEvent {
   bytes?: number[];
 }
 
+// E2E subprocesses must never report product usage or fetch the production
+// integrations catalog. Keep these after caller-provided values below so a
+// scenario cannot accidentally turn outbound telemetry back on.
+const E2E_OUTBOUND_OPT_OUT = {
+  DO_NOT_TRACK: "1",
+  EXECUTOR_DISABLE_ANALYTICS: "1",
+  EXECUTOR_DISABLE_INTEGRATIONS_FETCH: "1",
+} as const;
+
 /** terminal-control's JSONL recording → asciicast v2 (what asciinema plays). */
 const toAsciicast = (recording: Uint8Array): string => {
   const events = new TextDecoder()
@@ -74,7 +83,7 @@ export const makeCliSurface = (): CliSurface => ({
         const session: Session = await tc.launch({
           command,
           cwd: options?.cwd,
-          env: options?.env,
+          env: { ...options?.env, ...E2E_OUTBOUND_OPT_OUT },
           record: options?.record ? true : undefined,
           viewport: options?.viewport,
         });