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What's Cozy?

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Cozy is a platform that brings all your web services in the same private space. With it, your webapps and your devices can share data easily, providing you with a new experience. You can install Cozy on your own hardware where no one's tracking you.

What's cozy-contacts?

Contact manager for Cozy Cloud


πŸ“Œ Note: we recommend to use Yarn instead of NPM for package management. Don't hesitate to install and use it for your Cozy projects, it's now our main node packages tool for Cozy official apps.

Install and run in dev mode

Hacking the Cozy cozy-contacts app requires you to setup a dev environment.

You can then clone the app repository and install dependencies:

$ git clone
$ cd cozy-contacts
$ yarn install

πŸ“Œ If you use a node environment wrapper like nvm or ndenv, don't forget to set your local node version before doing a yarn install.

Cozy's apps use a standard set of npm scripts to run common tasks, like watch, lint, test, build…

Run it inside the VM

You can easily view your current running app, you can use the cozy-stack docker image:

# in a terminal, run your app in watch mode
$ cd cozy-contacts
$ yarn watch
# in another terminal, run the docker container
$ docker run --rm -it -p 8080:8080 -v "$(pwd)/build":/data/cozy-app/cozy-contacts cozy/cozy-app-dev
$ yarn stack:docker

your app is available at

Living on the edge

Cozy-ui is our frontend stack library that provides common styles and components accross the whole Cozy's apps. You can use it for you own application to follow the official Cozy's guidelines and styles. If you need to develop / hack cozy-ui, it's sometimes more useful to develop on it through another app. You can do it by cloning cozy-ui locally and link it to yarn local index:

git clone
cd cozy-ui
yarn install
yarn link

then go back to your app project and replace the distributed cozy-ui module with the linked one:

cd cozy-drive
yarn link cozy-ui

Cozy-client-js is our API library that provides an unified API on top of the cozy-stack. If you need to develop / hack cozy-client-js in parallel of your application, you can use the same trick that we used with cozy-ui: yarn linking.


Tests are run by jest under the hood. You can easily run the tests suite with:

$ cd cozy-contacts
$ yarn test

πŸ“Œ Don't forget to update / create new tests when you contribute to code to keep the app the consistent.


The Cozy datastore stores documents, which can be seen as JSON objects. A doctype is simply a declaration of the fields in a given JSON object, to store similar objects in an homogeneous fashion.

Cozy ships a built-in list of doctypes for representation of most of the common documents (Bills, Contacts, Files, ...).

Whenever your app needs to use a given doctype, you should:

  • Check if this is a standard doctype defined in Cozy itself. If this is the case, you should add a model declaration in your app containing at least the fields listed in the main fields list for this doctype. Note that you can extend the Cozy-provided doctype with your own customs fields. This is typically what is done in Konnectors for the Bill doctype.
  • If no standards doctypes fit your needs, you should define your own doctype in your app. In this case, you do not have to put any field you want in your model, but you should crosscheck other cozy apps to try to homogeneize the names of your fields, so that your doctype data could be reused by other apps. This is typically the case for the Konnector doctype in Konnectors.

Open a Pull-Request

If you want to work on cozy-contacts and submit code modifications, feel free to open pull-requests! See the contributing guide for more information about how to properly open pull-requests.



Localization and translations are handled by Transifex, which is used by all Cozy's apps.

As a translator, you can login to Transifex (using your Github account) and claim an access to the app repository. Locales are pulled when app is build before publishing.

As a developer, you must configure the transifex client, and claim an access as maintainer to the app repository. Then please only update the source locale file (usually en.json in client and/or server parts), and push it to Transifex repository using the tx push -s command.


The lead maintainer for cozy-contacts is cozy, send him/her a 🍻 to say hello!

Get in touch

You can reach the Cozy Community by:


cozy-contacts is developed by cozy and distributed under the AGPL v3 license.