diff --git a/profiles/develop/zsh/functions/chext b/profiles/develop/zsh/functions/chext
new file mode 100644
index 00000000..52905a9f
--- /dev/null
+++ b/profiles/develop/zsh/functions/chext
@@ -0,0 +1,5 @@
+[[ -z $3 ]] || return 1
+file=$1
+ext=$2
+new="${file:r}.${ext}"
+mv $file $new
diff --git a/profiles/develop/zsh/functions/rnm b/profiles/develop/zsh/functions/rnm
new file mode 100644
index 00000000..766bc9cf
--- /dev/null
+++ b/profiles/develop/zsh/functions/rnm
@@ -0,0 +1,4 @@
+[[ -z $3 ]] || return 1
+head=${1:h}
+name="${head}/${2}"
+mv $1 $name