Default UmbracoExtensions template packages.json does not work

[tbolon]

Which Umbraco version are you using?

16.1.1

Bug summary

The default extension project includes a buggy packages.json which does not resolve all dependencies.

$npm install
npm error code ERESOLVE
npm error ERESOLVE unable to resolve dependency tree
npm error
npm error While resolving: connect-cms-tip-tap-styles-extension@0.0.0
npm error Found: @hey-api/client-fetch@0.10.2
npm error node_modules/@hey-api/client-fetch
npm error   dev @hey-api/client-fetch@"^0.10.0" from the root project
npm error
npm error Could not resolve dependency:
npm error peer @hey-api/client-fetch@"^0.12.0" from @umbraco-cms/backoffice@16.1.1
npm error node_modules/@umbraco-cms/backoffice
npm error   dev @umbraco-cms/backoffice@"^*" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.
npm error
npm error
npm error For a full report see:
npm error d:\packages\npm\_logs\2025-08-12T09_55_49_991Z-eresolve-report.txt
npm error A complete log of this run can be found in: d:\packages\npm\_logs\2025-08-12T09_55_49_991Z-debug-0.log

Default package.json:

{
  "name": "umbraco-extension",
  "private": true,
  "version": "0.0.0",
  "type": "module",
  "scripts": {
    "watch": "tsc && vite build --watch",
    "build": "tsc && vite build",
    "generate-client": "node scripts/generate-openapi.js https://localhost:44339/umbraco/swagger/umbracoextension/swagger.json"
  },
  "devDependencies": {
    "@hey-api/client-fetch": "^0.10.0",
    "@hey-api/openapi-ts": "^0.66.7",
    "@umbraco-cms/backoffice": "^*",
    "chalk": "^5.4.1",
    "cross-env": "^7.0.3",
    "node-fetch": "^3.3.2",
    "typescript": "^5.8.3",
    "vite": "^6.3.4"
  }
}

fixed package.json:

{
  "name": "umbraco-extension",
  "private": true,
  "version": "0.0.0",
  "type": "module",
  "scripts": {
    "watch": "tsc && vite build --watch",
    "build": "tsc && vite build",
    "generate-client": "node scripts/generate-openapi.js https://localhost:44339/umbraco/swagger/umbracoextension/swagger.json"
  },
  "devDependencies": {
    "@umbraco-cms/backoffice": "^16.1.1",
    "chalk": "^5.4.1",
    "cross-env": "^7.0.3",
    "node-fetch": "^3.3.2",
    "typescript": "^5.8.3",
    "vite": "^6.3.4"
  }
}

Specifics

No response

Steps to reproduce

dotnet new install Umbraco.Templates
dotnet new umbraco-extension --name MyExtension
cd MyExtension/Client
npm install

Expected result / actual result

No response

[github-actions]

Hi there @tbolon!

Firstly, a big thank you for raising this issue. Every piece of feedback we receive helps us to make Umbraco better.

We really appreciate your patience while we wait for our team to have a look at this but we wanted to let you know that we see this and share with you the plan for what comes next.

• We'll assess whether this issue relates to something that has already been fixed in a later version of the release that it has been raised for.
• If it's a bug, is it related to a release that we are actively supporting or is it related to a release that's in the end-of-life or security-only phase?
• We'll replicate the issue to ensure that the problem is as described.
• We'll decide whether the behavior is an issue or if the behavior is intended.

We wish we could work with everyone directly and assess your issue immediately but we're in the fortunate position of having lots of contributions to work with and only a few humans who are able to do it. We are making progress though and in the meantime, we will keep you in the loop and let you know when we have any questions.

Thanks, from your friendly Umbraco GitHub bot 🤖 🙂

[warrenbuckley]

I have a draft PR of this here that will look to fix this - #19825
Need to find some time in the evening or a lunch to wrap it up (around the day job)

[umbracocommunity]

This issue has been mentioned on Umbraco community forum. There might be relevant details there:

https://forum.umbraco.com/t/upgrade-umbraco-on-macos/5563/9