diff --git a/scripts/scenarios/start-app.ts b/scripts/scenarios/start-app.ts
index 5dee3f26c1..24acd372b2 100644
--- a/scripts/scenarios/start-app.ts
+++ b/scripts/scenarios/start-app.ts
@@ -1,6 +1,7 @@
 #!/usr/bin/env node
 // The app command of e2e.config.ts: starts the dev stack of the checkout it runs in on a fresh
 // T3 home. e2e stops it with a signal, which ends the scope and the processes it started.
+import { tmpdir } from "node:os";
 import * as NodeCrypto from "@effect/platform-node/NodeCrypto";
 import * as NodeRuntime from "@effect/platform-node/NodeRuntime";
 import * as NodeServices from "@effect/platform-node/NodeServices";
@@ -70,16 +71,33 @@ const prepareHome = Effect.fn("startApp.prepareHome")(function* (home: string) {
     path.join(home, "userdata/settings.json"),
     yield* encodeSettings({
       defaultModelSelection: REPLAY,
-      providerInstances: Object.fromEntries(
-        REAL_PROVIDERS.map((driver) => [
-          driver,
-          {
+      providerInstances: {
+        devReplay: {
+          driver: "acpRegistry",
+          environment: [
+            {
+              name: "NODE_OPTIONS",
+              value: `--import ${tmpdir()}/factory-pr-34163-evidence-1/delay-replay.mjs`,
+              sensitive: false,
+            },
+            {
+              name: "T3_STOP_PROOF_DIR",
+              value: `${tmpdir()}/factory-pr-34163-evidence-1`,
+              sensitive: false,
+            },
+          ],
+        },
+        ...Object.fromEntries(
+          REAL_PROVIDERS.map((driver) => [
             driver,
-            enabled: false,
-            ...(driver === "codex" ? { config: { binaryPath: noModel } } : {}),
-          },
-        ]),
-      ),
+            {
+              driver,
+              enabled: false,
+              ...(driver === "codex" ? { config: { binaryPath: noModel } } : {}),
+            },
+          ]),
+        ),
+      },
     }),
   );
 });