wrangler.jsonc file not utilized in Cloudflare Pages build #14926
Description
Describe the bug
Adding a wrangler.jsonc file according to the docs results in a malformed configuration file:
Found wrangler.json file. Reading build configuration...
A wrangler.toml file was found but it does not appear to be valid. Did you mean to use wrangler.toml to configure Pages? If so, then make sure the file is valid and contains the
pages_build_output_dirproperty. Skipping file and continuing.
Reproduction
https://github.com/hyunbinseo/svelte-kit-14926
Logs
2025-11-14T11:59:34.213467Z Cloning repository...
2025-11-14T11:59:34.815284Z From https://github.com/hyunbinseo/svelte-kit-14926
2025-11-14T11:59:34.815784Z * branch 3bc5a8f5f6ac331817839f96d68b63060a3ec077 -> FETCH_HEAD
2025-11-14T11:59:34.815889Z
2025-11-14T11:59:34.843402Z HEAD is now at 3bc5a8f chore: add wrangler.jsonc file
2025-11-14T11:59:34.844004Z
2025-11-14T11:59:34.930133Z
2025-11-14T11:59:34.930587Z Using v2 root directory strategy
2025-11-14T11:59:34.954518Z Success: Finished cloning repository files
2025-11-14T11:59:36.758261Z Checking for configuration in a Wrangler configuration file (BETA)
2025-11-14T11:59:36.758819Z
2025-11-14T11:59:36.759999Z Found wrangler.json file. Reading build configuration...
2025-11-14T11:59:37.862866Z A wrangler.toml file was found but it does not appear to be valid. Did you mean to use wrangler.toml to configure Pages? If so, then make sure the file is valid and contains the `pages_build_output_dir` property. Skipping file and continuing.
20:59:52.846 ⛅️ wrangler 3.101.0
20:59:52.847 -------------------
20:59:53.917 ▲ [WARNING] The package "node:async_hooks" wasn't found on the file system but is built into node.
20:59:53.918
20:59:53.918 Your Worker may throw errors at runtime unless you enable the "nodejs_compat" compatibility flag. Refer to https://developers.cloudflare.com/workers/runtime-apis/nodejs/ for more details. Imported from:
20:59:53.919 - ../../node_modules/.pnpm/@sveltejs+kit@2.48.5_@sveltejs+vite-plugin-svelte@6.2.1_svelte@5.43.6_vite@7.2.2__svelte@5.43.6_vite@7.2.2/node_modules/@sveltejs/kit/src/exports/internal/event.js
20:59:53.919
20:59:53.919
20:59:53.919 ✨ Compiled Worker successfully
20:59:55.004 Found _routes.json in output directory. Uploading.
20:59:55.017 Validating asset output directory
20:59:57.826 Deploying your site to Cloudflare's global network...
21:00:00.856 Parsed 2 valid header rules.
21:00:02.628 Uploading... (0/16)
21:00:07.957 Uploading... (5/16)
21:00:08.205 Uploading... (10/16)
21:00:08.307 Uploading... (16/16)
21:00:08.307 ✨ Success! Uploaded 16 files (6.50 sec)
21:00:08.308
21:00:08.784 ✨ Upload complete!
21:00:14.676 Success: Assets published!
21:00:21.329 Success: Your site was deployed!
System Info
System:
OS: Windows 11 10.0.26200
CPU: (8) x64 Intel(R) Core(TM) Ultra 7 258V
Memory: 4.71 GB / 31.48 GB
Binaries:
Node: 24.11.0 - C:\Users\hyunb\AppData\Local\fnm_multishells\27868_1763104344985\node.EXE
Yarn: 1.22.22 - C:\Users\hyunb\AppData\Local\fnm_multishells\27868_1763104344985\yarn.CMD
npm: 11.6.1 - C:\Users\hyunb\AppData\Local\fnm_multishells\27868_1763104344985\npm.CMD
pnpm: 10.22.0 - C:\Users\hyunb\AppData\Local\fnm_multishells\27868_1763104344985\pnpm.CMD
Deno: 2.4.0 - C:\Users\hyunb\.deno\bin\deno.EXE
Browsers:
Chrome: 142.0.7444.135
Edge: Chromium (140.0.3485.54)
Firefox: 145.0 - C:\Program Files\Mozilla Firefox\firefox.exe
npmPackages:
@sveltejs/adapter-cloudflare: ^7.2.4 => 7.2.4
@sveltejs/kit: ^2.47.1 => 2.48.5
@sveltejs/vite-plugin-svelte: ^6.2.1 => 6.2.1
svelte: ^5.41.0 => 5.43.6
vite: ^7.1.10 => 7.2.2Severity
annoyance
Additional Information
No response