presets(vercel): add framework info to build output config

src/presets/vercel/types.ts

@@ -43,6 +43,9 @@ export interface VercelBuildConfigV3 {
   >;
   cache?: string[];
   bypassToken?: string;
+  framework?: {
+    version: string;
+  };
   crons?: {
     path: string;
     schedule: string;

src/presets/vercel/utils.ts

@@ -1,6 +1,7 @@
 import fsp from "node:fs/promises";
 import { defu } from "defu";
 import { writeFile } from "../_utils/fs.ts";
+import { version as nitroVersion } from "nitro/meta";
 import type { Nitro, NitroRouteRules } from "nitro/types";
 import { dirname, relative, resolve } from "pathe";
 import { joinURL, withLeadingSlash, withoutLeadingSlash } from "ufo";
@@ -137,6 +138,9 @@ function generateBuildConfig(nitro: Nitro, o11Routes?: ObservabilityRoute[]) {
 
   const config = defu(nitro.options.vercel?.config, {
     version: 3,
+    framework: {
+      version: nitroVersion,
+    },
     overrides: {
       // Nitro static prerendered route overrides
       ...Object.fromEntries(

test/presets/vercel.test.ts

@@ -1,6 +1,7 @@
 import { promises as fsp } from "node:fs";
 import { resolve, join, basename } from "pathe";
 import { describe, expect, it, vi, beforeAll, afterAll } from "vitest";
+import { version as nitroVersion } from "nitro/meta";
 import { setupTest, testNitro, fixtureDir } from "../tests.ts";
 import { toFetchHandler } from "srvx/node";
 
@@ -27,6 +28,8 @@ describe("nitro:preset:vercel:web", async () => {
         const config = await fsp
           .readFile(resolve(ctx.outDir, "config.json"), "utf8")
           .then((r) => JSON.parse(r));
+        expect(config.framework).toEqual({ version: nitroVersion });
+        delete config.framework;
         expect(config).toMatchInlineSnapshot(`
           {
             "overrides": {