diff --git a/knowledge base/markdown.md b/knowledge base/markdown.md
index 4ac13d7..7c645ef 100644
--- a/knowledge base/markdown.md	
+++ b/knowledge base/markdown.md	
@@ -90,6 +90,11 @@ Code blocks for diagrams can either:
 - start with ` ```mermaid ` and finish with ` ``` `, or
 - start with `:::mermaid` and finish with `:::`.
 
+| Code delimiter | Gitea | Github | Gitlab |
+| -------------- | ----- | ------ | ------ |
+| ` ```mermaid ` | ✓     | ✓      | ✓      |
+| ` :::mermaid ` | ✓     | ✗      | ✓      |
+
 ### Flowchart A.K.A. graph
 
 ```md