diff --git a/CHANGELOG.md b/CHANGELOG.md
index a3fee91d..516e499a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,7 @@ Special thanks to: @rejas, @sdetweil, @MagMar94
 - Added hourlyWeather functionality to Weather.gov weather provider
 - Removed weatherEndpoint definition from weathergov.js (not used)
 - Added css class names "today" and "tomorrow" for default calendar
+- Added Collaboration.md
 - Added new github action for dependency review (#2862)
 
 ### Removed
diff --git a/Collaboration.md b/Collaboration.md
new file mode 100644
index 00000000..6be3fecb
--- /dev/null
+++ b/Collaboration.md
@@ -0,0 +1,12 @@
+This document describes how collaborators of this repository should work together.
+
+## Pull Requests
+
+- never merge your own PR's
+- never merge without someone having approved (approving and merging from same person is allowed)
+- wait for all approvals requested (or the author decides something different in the comments)
+
+## Issues
+
+- "real" Issues are closed if the problem is solved and the fix is released
+- unrelated Issues (e.g. related to a foreign module) are closed immediately with a comment to open an issue in the module repository or to discuss this further in the forum or discord