diff --git a/knowledge base/expect.placeholder b/knowledge base/expect.placeholder
new file mode 100644
index 0000000..e69de29
diff --git a/knowledge base/kubernetes/kueue.placeholder b/knowledge base/kubernetes/kueue.placeholder
new file mode 100644
index 0000000..400b873
--- /dev/null
+++ b/knowledge base/kubernetes/kueue.placeholder	
@@ -0,0 +1 @@
+https://kueue.sigs.k8s.io/
diff --git a/knowledge base/tmux.placeholder b/knowledge base/tmux.placeholder
new file mode 100644
index 0000000..577d5c8
--- /dev/null
+++ b/knowledge base/tmux.placeholder	
@@ -0,0 +1 @@
+https://github.com/tmux/tmux/wiki/