docs(ospo): community health rollout v2 — README, agents.md, health files (#1344)

docs: OSPO community health rollout v2

Introduced by the Kiteworks Open Source Program Office (OSPO) on May 5, 2026.

Changes:
- README.md: rewritten with OSPO v2 template — license-specific Apache 2.0
  migration guidance, Community & Support section with mandatory links
  (GitHub Discussions, Matrix, docs, enterprise support), Contributing
  workflow (Rebase Early/Often, Dependabot, PGP-signed commits, DCO,
  GitHub Actions policy), Security pointing to security.owncloud.com +
  YesWeHack bug bounty
- agents.md: added OSPO Policy Constraints (GitHub Actions, Dependabot,
  Git Workflow) for AI coding agents
- CODE_OF_CONDUCT.md: redirect to https://owncloud.com/contribute/code-of-conduct/
- CONTRIBUTING.md: redirect to https://owncloud.com/contribute/
- SECURITY.md: redirect to https://security.owncloud.com + YesWeHack
- SUPPORT.md: redirect to https://owncloud.com/contact-us/ + channels

OSPO: https://kiteworks.com/opensource

Signed-off-by: David Walter <david.walter@kiteworks.com>
Co-authored-by: Thomas Müller <1005065+DeepDiver1975@users.noreply.github.com>

Author: dj4oC

CODE_OF_CONDUCT.md

@@ -0,0 +1,8 @@
+# Code of Conduct
+
+This project follows the ownCloud Code of Conduct.
+
+Please read the full Code of Conduct at:
+**<https://owncloud.com/contribute/code-of-conduct/>**
+
+By participating in this project, you agree to abide by its terms.

CONTRIBUTING.md

@@ -0,0 +1,9 @@
+# Contributing
+
+Thank you for your interest in contributing to this project!
+
+Please read the full contributing guidelines at:
+**<https://owncloud.com/contribute/>**
+
+For development setup, coding standards, and pull request process,
+see the README in this repository.

README.md

@@ -1,41 +1,101 @@
 # ownCloud Calendar
 
-[![Build Status](https://drone.owncloud.com/api/badges/owncloud/calendar/status.svg)](https://drone.owncloud.com/owncloud/calendar)
-[![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=owncloud_calendar&metric=alert_status)](https://sonarcloud.io/dashboard?id=owncloud_calendar)
-[![Security Rating](https://sonarcloud.io/api/project_badges/measure?project=owncloud_calendar&metric=security_rating)](https://sonarcloud.io/dashboard?id=owncloud_calendar)
-[![Coverage](https://sonarcloud.io/api/project_badges/measure?project=owncloud_calendar&metric=coverage)](https://sonarcloud.io/dashboard?id=owncloud_calendar)
+<!-- OSPO-managed README | Generated: 2026-04-16 | v2 -->
 
-**A calendar app for [ownCloud](https://owncloud.org)**  
+[![License](https://img.shields.io/badge/License-AGPL--3.0-blue.svg)](COPYING) [![ownCloud OSPO](https://img.shields.io/badge/OSPO-ownCloud-blue)](https://kiteworks.com/opensource) [![Docker Hub](https://img.shields.io/docker/pulls/owncloud)](https://hub.docker.com/r/owncloud/server)
 
-This is the new calendar app that has replaced the [old calendar app](https://github.com/owncloudarchive/calendar), and is only the frontend for the new server-integrated CalDAV-Backend.
+The ownCloud Calendar app provides a web-based calendar interface for ownCloud Server. It is the frontend for the server-integrated CalDAV backend, replacing the original calendar app. Users can create and manage multiple calendars, schedule events, and share calendars with other users. The app supports Chrome/Chromium 49+, Edge 14+, Firefox 45+, Internet Explorer 11, and Safari 10+.
 
-![](https://github.com/owncloud/screenshots/blob/master/calendar/screenshot.png)
+## Part of Classic (OC10)
 
-## Maintainer:
+Calendar is an app for [ownCloud Server (Classic)](https://github.com/owncloud/core). It uses the CalDAV backend built into ownCloud Server core. The app is available on [Docker Hub as part of the ownCloud Server image](https://hub.docker.com/r/owncloud/server).
 
- - [Julian Müller](https://github.com/Julian1998)
+## Getting Started
 
-## Contributors:
+1. Clone this repository into the `apps/` directory of your ownCloud Server installation
+2. Run `make` to build the app
+3. Enable the app: `occ app:enable calendar`
 
- - [Georg Ehrke](https://github.com/georgehrke)
- - [Raghu Nayyar](https://github.com/raghunayyar)
- - [Bernhard Fröhler](https://github.com/codeling)
- - [and many more](https://github.com/owncloud/calendar/graphs/contributors)
+## Documentation
 
-If you’d like to join, just go through the [issue list](https://github.com/owncloud/calendar/issues) and fix some. :)   
-We’re also in [#owncloud-calendar on freenode IRC](https://webchat.freenode.net/?channels=owncloud-calendar).
+- [Calendar FAQ](https://github.com/owncloud/calendar/wiki/FAQs)
+- [ownCloud Server documentation](https://doc.owncloud.com)
+- For CalDAV backend issues, see [ownCloud Core](https://github.com/owncloud/core)
 
-## Support:
+## Community & Support
 
-Check out our [FAQ](https://github.com/owncloud/calendar/wiki/FAQs). If you don't find a solution, you are welcome to [ask for support](https://owncloud.org/support/) in our Forums or the IRC-Channel. If you have found a bug, feel free to open a new Issue on GitHub. Keep in mind, that this repository only manages the frontend. If you find bugs or have problems with the CalDAV-Backend, you should ask the guys at [ownCloud Core](https://github.com/owncloud/core) for help!
+**[Star](https://github.com/owncloud/calendar)** this repo and **Watch** for release notifications!
 
-## Supported Browsers
+- [ownCloud Website](https://owncloud.com)
+- [Community Discussions](https://github.com/orgs/owncloud/discussions)
+- [Matrix Chat](https://app.element.io/#/room/#owncloud:matrix.org)
+- [Documentation](https://doc.owncloud.com)
+- [Enterprise Support](https://owncloud.com/contact-us/)
+- [OSPO Home](https://kiteworks.com/opensource)
 
-* Chrome/Chromium 49+
-* Edge 14+
-* Firefox 45+
-* Internet Explorer 11
-* Safari 10+
+## Contributing
 
-We don't support Internet Explorer 10 and below. Patches for IE9+ are accepted though.
+We welcome contributions! Please read the [Contributing Guidelines](CONTRIBUTING.md)
+and our [Code of Conduct](CODE_OF_CONDUCT.md) before getting started.
 
+### Workflow
+
+- **Rebase Early, Rebase Often!** We use a rebase workflow. Always rebase on the target branch before submitting a PR.
+- **Dependabot**: Automated dependency updates are managed via Dependabot. Review and merge dependency PRs promptly.
+- **Signed Commits**: All commits **must** be PGP/GPG signed. See [GitHub's signing guide](https://docs.github.com/en/authentication/managing-commit-signature-verification).
+- **DCO Sign-off**: Every commit must carry a `Signed-off-by` line:
+  ```
+  git commit -s -S -m "your commit message"
+  ```
+- **GitHub Actions Policy**: Workflows may only use actions that are (a) owned by `owncloud`, (b) created by GitHub (`actions/*`), or (c) verified in the GitHub Marketplace.
+
+## Translations
+
+Help translate this project on Transifex:
+**<https://explore.transifex.com/owncloud-org/owncloud/>**
+
+Please submit translations via Transifex -- do not open pull requests for translation changes.
+
+## Security
+
+**Do not open a public GitHub issue for security vulnerabilities.**
+
+Report vulnerabilities at **<https://security.owncloud.com>** -- see [SECURITY.md](SECURITY.md).
+
+Bug bounty: [YesWeHack ownCloud Program](https://yeswehack.com/programs/owncloud-bug-bounty-program)
+
+## License
+
+This project is licensed under the [AGPL-3.0](COPYING).
+
+## About the ownCloud OSPO
+
+The [Kiteworks Open Source Program Office](https://kiteworks.com/opensource), operating under
+the [ownCloud](https://owncloud.com) brand, launched on May 5, 2026, to steward the open source
+ecosystem around ownCloud's products. The OSPO ensures transparent governance, license compliance,
+community health, and sustainable collaboration between the open source community and
+[Kiteworks](https://www.kiteworks.com), which acquired ownCloud in 2023.
+
+- **OSPO Home**: <https://kiteworks.com/opensource>
+- **GitHub**: <https://github.com/owncloud>
+- **ownCloud**: <https://owncloud.com>
+
+For questions about the OSPO or licensing, contact ospo@kiteworks.com.
+
+### License Migration to Apache 2.0
+
+The OSPO is driving a strategic relicensing of ownCloud repositories toward the
+[Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0), following
+the [Apache Software Foundation's third-party license policy](https://www.apache.org/legal/resolved.html).
+
+Individual repositories will migrate as their audit is completed. The LICENSE file
+in each repo reflects its **current** license status (not the target).
+
+**Current license: AGPL-3.0** (Category X per Apache policy -- cannot be included in Apache-2.0 works).
+
+Migration prerequisites for this repository:
+
+- **CLA/DCO coverage**: All past contributors must have signed agreements permitting relicensing
+- **Copyleft dependency audit**: All AGPL/GPL dependencies must be replaced or isolated
+- **KDE heritage review**: Any code with KDE-era copyrights requires legal analysis
+- **Complete relicensing**: AGPL-3.0 is a strong copyleft license; migration requires full relicensing of all files, not just a header change

SECURITY.md

@@ -0,0 +1,11 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+**Do NOT open a public GitHub issue for security vulnerabilities.**
+
+Please report security issues responsibly via:
+**<https://security.owncloud.com>**
+
+You can also report vulnerabilities through our YesWeHack bug bounty program:
+**<https://yeswehack.com/programs/owncloud-bug-bounty-program>**

SUPPORT.md

@@ -0,0 +1,10 @@
+# Support
+
+For support with this project, please use the following channels:
+
+- **Enterprise Support**: <https://owncloud.com/contact-us/>
+- **Community discussions**: https://github.com/orgs/owncloud/discussions
+- **Matrix Chat**: <https://app.element.io/#/room/#owncloud:matrix.org>
+- **Documentation**: <https://doc.owncloud.com>
+
+Please do not use GitHub issues for general support questions.

agents.md

@@ -0,0 +1,86 @@
+# AI Agent Guidelines for Calendar
+
+This file provides context for AI coding agents (Claude Code, GitHub Copilot, Cursor, etc.) working in this repository.
+
+## Repository Overview
+- **Product family:** Classic (OC10)
+- **Primary language(s):** JavaScript, PHP
+- **Build system:** Composer, Make, npm/Yarn, Gulp
+- **Test framework:** PHPUnit, Karma (JavaScript)
+- **CI system:** GitHub Actions
+
+## Architecture & Key Paths
+- `controller/` - PHP controllers
+- `http/` - HTTP layer
+- `js/` - Frontend JavaScript
+- `css/` - Stylesheets
+- `templates/` - Server-side templates
+- `l10n/` - Translations
+- `appinfo/` - ownCloud app metadata
+- `img/` - App icons
+- `screenshots/` - App screenshots
+- `tests/` - Test suites
+- `Makefile` - Build and test automation
+- `composer.json` - PHP dependencies
+- `package.json` - JavaScript dependencies
+- `gulpfile.js` - Gulp task runner configuration
+- `phpunit.xml` - PHPUnit configuration
+
+## Development Conventions
+- **Branching:** master
+- **Commit messages:** DCO sign-off required (`git commit -s`)
+- **Code style:** PHP_CodeSniffer, ownCloud coding standard, ESLint
+- **PR process:** Open a PR against master. All CI checks must pass.
+
+## Build & Test Commands
+```bash
+# Build
+make
+
+# Test (all)
+make test
+
+# Test (PHP unit)
+make test-php-unit
+
+# Test (JavaScript)
+make test-js
+
+# Lint (PHP)
+make test-php-style
+
+# Fix code style
+make test-php-style-fix
+```
+
+## Important Constraints
+- All code contributions must be compatible with the **AGPL-3.0** license
+- Do not introduce new **copyleft-licensed dependencies** (GPL, AGPL, LGPL, MPL) without explicit discussion in an issue first. This is especially important for repos migrating to Apache 2.0.
+- Do not introduce new dependencies without discussion in an issue first
+- This app is the frontend only; the CalDAV backend is in ownCloud Core
+
+
+## OSPO Policy Constraints
+
+### GitHub Actions
+- **Only** use actions owned by `owncloud`, created by GitHub (`actions/*`), or verified on the GitHub Marketplace.
+- Pin all actions to their full commit SHA (not tags): `uses: actions/checkout@<SHA> # vX.Y.Z`
+- Never introduce actions from unverified third parties.
+
+### Dependency Management
+- Dependabot is configured for automated dependency updates.
+- Review and merge Dependabot PRs as part of regular maintenance.
+- Do not introduce new dependencies without discussion in an issue first.
+
+### Git Workflow
+- **Rebase policy**: Always rebase; never create merge commits. Use `git pull --rebase` and `git rebase` before pushing.
+- **Signed commits**: All commits **must** be PGP/GPG signed (`git commit -S -s`).
+- **DCO sign-off**: Every commit needs a `Signed-off-by` line (`git commit -s`).
+- **Conventional Commits**: Use the [Conventional Commits](https://www.conventionalcommits.org/) format where the repository enforces it.
+
+## Context for AI Agents
+- Match existing code style
+- Do not refactor unrelated code in the same PR
+- Write tests for new functionality
+- Keep PRs focused and atomic
+- Backend (CalDAV) issues should be filed against ownCloud Core, not this repository