diff --git a/scripts/scenarios/start-app.ts b/scripts/scenarios/start-app.ts
index 5dee3f26c1..3613273c17 100644
--- a/scripts/scenarios/start-app.ts
+++ b/scripts/scenarios/start-app.ts
@@ -17,7 +17,7 @@ import * as Stream from "effect/Stream";
 import { Argument, Command } from "effect/cli";
 import { ChildProcess, ChildProcessSpawner } from "effect/process";
 
-import { ScenarioError } from "./shell.ts";
+import { run, ScenarioError } from "./shell.ts";
 
 // The dev runner's web port is 5733 plus an offset. Mirror of BASE_WEB_PORT in dev-runner.ts.
 const BASE_WEB_PORT = 5733;
@@ -52,7 +52,7 @@ esac
 
 const encodeSettings = Schema.encodeEffect(Schema.fromJsonString(Schema.Unknown));
 
-const prepareHome = Effect.fn("startApp.prepareHome")(function* (home: string) {
+const prepareHome = Effect.fn("startApp.prepareHome")(function* (home: string, revision: string) {
   const fs = yield* FileSystem.FileSystem;
   const path = yield* Path.Path;
   yield* fs.remove(home, { recursive: true, force: true });
@@ -60,15 +60,20 @@ const prepareHome = Effect.fn("startApp.prepareHome")(function* (home: string) {
   yield* fs.makeDirectory(path.join(home, "bin"));
   for (const command of ["hostnamectl", "scutil"]) {
     const shim = path.join(home, "bin", command);
-    yield* fs.writeFileString(shim, HOST_LABEL_SHIM);
+    yield* fs.writeFileString(shim, HOST_LABEL_SHIM.replaceAll('echo "Scenario"', `echo "Web ${revision}"`));
     yield* fs.chmod(shim, 0o755);
   }
+  const shell = path.join(home, "bin/scenario-shell");
+  yield* fs.writeFileString(shell, "#!/bin/sh\nexport PS1='$ '\nexec /bin/bash --noprofile --norc -i\n");
+  yield* fs.chmod(shell, 0o755);
   const noModel = path.join(home, "bin/no-model");
   yield* fs.writeFileString(noModel, "#!/bin/sh\necho 'scenarios run no model' >&2\nexit 1\n");
   yield* fs.chmod(noModel, 0o755);
   yield* fs.writeFileString(
     path.join(home, "userdata/settings.json"),
     yield* encodeSettings({
+      automaticGitFetchInterval: 0,
+      backgroundActivity: { profile: "custom", baseProfile: "balanced", overrides: { automaticGitFetchInterval: 0 } },
       defaultModelSelection: REPLAY,
       providerInstances: Object.fromEntries(
         REAL_PROVIDERS.map((driver) => [
@@ -125,11 +130,13 @@ const startApp = Effect.fn("startApp")(function* (input: {
   const node = yield* HostProcess.ExecutablePath;
   const checkout = yield* HostProcess.WorkingDirectory;
   const hostEnvironment = yield* HostProcess.Environment;
-  yield* prepareHome(input.home);
+  const revision = (yield* run("git", ["rev-parse", "--short=10", "HEAD"], { cwd: checkout })).stdout.trim();
+  yield* prepareHome(input.home, revision);
   const env = {
     ...hostEnvironment,
     PATH: `${path.join(input.home, "bin")}:${hostEnvironment.PATH ?? ""}`,
     T3CODE_AUTO_BOOTSTRAP_PROJECT_FROM_CWD: "0",
+    SHELL: path.join(input.home, "bin/scenario-shell"),
   };
   const devRunner = (mode: string, args: ReadonlyArray<string>) => [
     "scripts/dev-runner.ts",