diff --git a/apps/backend/api/config-github-apply.ts b/apps/backend/api/config-github-apply.ts
new file mode 100644
index 000000000..59deed829
--- /dev/null
+++ b/apps/backend/api/config-github-apply.ts
@@ -0,0 +1,8 @@
+import app from "../dist/vercel.mjs";
+
+export const config = {
+  runtime: "nodejs",
+  maxDuration: 800,
+};
+
+export default app;
diff --git a/apps/backend/api/config-github-commit.ts b/apps/backend/api/config-github-commit.ts
new file mode 100644
index 000000000..74b64ab32
--- /dev/null
+++ b/apps/backend/api/config-github-commit.ts
@@ -0,0 +1,8 @@
+import app from "../dist/vercel.mjs";
+
+export const config = {
+  runtime: "nodejs",
+  maxDuration: 120,
+};
+
+export default app;
diff --git a/apps/backend/src/server/app.ts b/apps/backend/src/server/app.ts
index 047278972..2bc0c5dba 100644
--- a/apps/backend/src/server/app.ts
+++ b/apps/backend/src/server/app.ts
@@ -178,6 +178,33 @@ import.meta.vitest?.test("API version migrations do not expose their internal re
   }
 });
 
+import.meta.vitest?.test("uncaught dispatch errors use the global sanitized error boundary", async ({ expect }) => {
+  const { vi } = import.meta.vitest!;
+  vi.stubEnv("NODE_ENV", "production");
+  vi.stubEnv("HEXCLAVE_ARTIFICIAL_DEVELOPMENT_DELAY_MS", "1");
+  vi.stubEnv("STACK_ARTIFICIAL_DEVELOPMENT_DELAY_MS", "1");
+
+  try {
+    const response = await app.handle(new Request("http://localhost/api/v1"));
+
+    expect({
+      status: response.status,
+      body: await response.text(),
+      contentType: response.headers.get("content-type"),
+      contentTypeOptions: response.headers.get("x-content-type-options"),
+    }).toMatchInlineSnapshot(`
+      {
+        "body": "Internal Server Error",
+        "contentType": "text/plain; charset=utf-8",
+        "contentTypeOptions": "nosniff",
+        "status": 500,
+      }
+    `);
+  } finally {
+    vi.unstubAllEnvs();
+  }
+});
+
 function homeHtml() {
   const devStatsLink = getNodeEnvironment() === "development"
     ? `<br><a href="/dev-stats">Dev Stats</a><br>`
diff --git a/apps/backend/src/server/vercel-config.test.ts b/apps/backend/src/server/vercel-config.test.ts
new file mode 100644
index 000000000..b83eb08b5
--- /dev/null
+++ b/apps/backend/src/server/vercel-config.test.ts
@@ -0,0 +1,31 @@
+import { readFile } from "node:fs/promises";
+import { describe, expect, it } from "vitest";
+
+describe("Vercel function durations", () => {
+  it("preserves the route-specific limits from the Next.js deployment", async () => {
+    const [vercelJson, applyEntry, commitEntry] = await Promise.all([
+      readFile(new URL("../../vercel.json", import.meta.url), "utf8"),
+      readFile(new URL("../../api/config-github-apply.ts", import.meta.url), "utf8"),
+      readFile(new URL("../../api/config-github-commit.ts", import.meta.url), "utf8"),
+    ]);
+
+    expect(JSON.parse(vercelJson)).toMatchObject({
+      rewrites: [
+        {
+          source: "/api/:version/internal/config/github/apply",
+          destination: "/api/config-github-apply",
+        },
+        {
+          source: "/api/:version/internal/config/github/commit",
+          destination: "/api/config-github-commit",
+        },
+        {
+          source: "/(.*)",
+          destination: "/api",
+        },
+      ],
+    });
+    expect(applyEntry).toContain("maxDuration: 800");
+    expect(commitEntry).toContain("maxDuration: 120");
+  });
+});
diff --git a/apps/backend/vercel.json b/apps/backend/vercel.json
index 921bc8f0d..fb7b45f13 100644
--- a/apps/backend/vercel.json
+++ b/apps/backend/vercel.json
@@ -2,6 +2,8 @@
   "$schema": "https://openapi.vercel.sh/vercel.json",
   "framework": null,
   "rewrites": [
+    { "source": "/api/:version/internal/config/github/apply", "destination": "/api/config-github-apply" },
+    { "source": "/api/:version/internal/config/github/commit", "destination": "/api/config-github-commit" },
     { "source": "/(.*)", "destination": "/api" }
   ],
   "crons": [