add AI-Policy and Contributing and agents.md files to the repo

Signed-off-by: Simon L. <szaimen@e.mail.de>

CONTRIBUTING.md

@@ -0,0 +1,76 @@
+<!--
+SPDX-FileCopyrightText: 2021-2024 Nextcloud GmbH and Nextcloud contributors
+SPDX-License-Identifier: MIT
+-->
+
+## Submitting issues
+
+If you have questions about how to install or use Nextcloud, please direct these to our [forum][forum].
+
+### Guidelines
+* Please search the existing issues first, it's likely that your issue was already reported or even fixed.
+  - Go to one of the repositories, click "issues" and type any word in the top search/command bar.
+  - More info on [search syntax within github](https://help.github.com/articles/searching-issues)
+* __SECURITY__: Report any potential security bug to us via [our HackerOne page](https://hackerone.com/nextcloud) following our [security policy](https://nextcloud.com/security/) instead of filing an issue in our bug tracker.
+* The issues in other components should be reported in their respective repositories: You will find them in our [GitHub Organization](https://github.com/nextcloud/)
+* Report the issue using one of our templates, they include all the information we need to track down the issue.
+
+Help us to maximize the effort we can spend fixing issues and adding new features, by not reporting duplicate issues.
+
+[forum]: https://help.nextcloud.com/
+
+## Contributing to Source Code
+
+Thanks for wanting to contribute source code to Nextcloud. That's great!
+
+Please read the [Developer Manuals][devmanual] to learn how to create your first application or how to test the Nextcloud code.
+
+### AI-assisted contributions
+
+Nextcloud allows contributions made with the help of AI tools. You are the author of everything you submit - AI assistance does not change that responsibility.
+
+* **Disclosure:** Declare AI tool use in the PR description and add an `Assisted-by: AGENT_NAME:MODEL_VERSION` git trailer to each affected commit.
+
+* **Accountability:** You must be able to explain, defend, and modify every line you submit. If a reviewer asks why something works a certain way, "the AI wrote it" is not an answer.
+
+* **Communication:** PR descriptions, review comments, and issue reports must be written in your own words. This applies throughout the review process - passing reviewer feedback to an AI and posting whatever comes out is not acceptable.
+
+* **Quality:** AI output must be quality assured by the human, i.e. reviewed, cleaned up, and tested before submission. New features must be tested on a live instance by you, not by an agent. Code that has never been executed, or that shifts debugging work onto maintainers, will not be accepted.
+
+* **Licensing:** Ensure AI-generated code contains no material incompatible with the license of the repository you are contributing to.
+
+For the full policy including autonomous agent rules, security reports, and beginner issues, read the [AI Contribution Policy][aipolicy].
+
+### Tests
+
+In order to constantly increase the quality of our software we can no longer accept pull request which submit un-tested code.
+It is a must have that changed and added code segments are unit tested.
+In some areas unit testing is hard (aka almost impossible) as of today - in these areas refactoring WHILE fixing a bug is encouraged to enable unit testing.
+
+### Sign your work
+
+We use the Developer Certificate of Origin (DCO) as a additional safeguard
+for the Nextcloud project. This is a well established and widely used
+mechanism to assure contributors have confirmed their right to license
+their contribution under the project's license.
+Please read [contribute/developer-certificate-of-origin][dcofile].
+If you can certify it, then just add a line to every git commit message:
+
+````
+  Signed-off-by: Random J Developer <random@developer.example.org>
+````
+
+Use your real name (sorry, no pseudonyms or anonymous contributions).
+If you set your `user.name` and `user.email` git configs, you can sign your
+commit automatically with `git commit -s`. You can also use git [aliases](https://git-scm.com/book/tr/v2/Git-Basics-Git-Aliases)
+like `git config --global alias.ci 'commit -s'`. Now you can commit with
+`git ci` and the commit will be signed.
+
+### Apply a license
+
+In case you are not sure how to add or update the license header correctly please have a look at [contribute/HowToApplyALicense.md][applyalicense]
+
+[devmanual]: https://github.com/nextcloud/all-in-one/blob/main/develop.md
+[dcofile]: https://github.com/nextcloud/server/blob/master/contribute/developer-certificate-of-origin
+[applyalicense]: https://github.com/nextcloud/server/blob/master/contribute/HowToApplyALicense.md
+[aipolicy]: https://github.com/nextcloud/all-in-one/blob/main/AI_POLICY.md