feat: refresh shared skills catalog

skills/deliver-file/SKILL.md

@@ -4,6 +4,7 @@ description: >
   Deliver a file or directory from this host to the user's device over
   Tailscale SSH. Use when the user wants to download, receive, or get a
   file, document, archive, report, or folder from the host machine.
+scope: global
 ---
 
 # Deliver File
@@ -21,10 +22,12 @@ Host address: `vasily@msi.tail0b014a.ts.net` (Tailscale IP 100.67.41.125).
 If `t3-deliver` is missing, print the equivalent command yourself:
 
 ```text
-scp vasily@msi.tail0b014a.ts.net:"/absolute/path/to/file" .
+scp "vasily@msi.tail0b014a.ts.net:/absolute/path/to/file" .
 ```
 
-Add `-r` for directories.
+Add `-r` after `scp` for directories. This command assumes OpenSSH scp with
+SFTP support. For names containing shell expansion characters, use a simple
+archive name rather than handing the user an unsafe command.
 
 ## Notes