Point shell documentation to the canonical reference

manual/32-shell-plugins.md

@@ -95,7 +95,7 @@ omarchy plugin validate ./my-plugin
 
 That runs the same checks the shell does at load time: the schema version, the required fields, an id that isn't reserved, entry points that are safe relative paths and actually exist, an entry point for every kind you claimed, and no symlinks anywhere inside the folder.
 
-For the full picture, the source is the documentation: `shell/README.md` in the Omarchy repo covers the manifest schema, the shell's IPC contract, and the exact shape of `shell.json`, and `shell/plugins/README.md` lists every first-party plugin with its id, kinds, and entry points.
+For plugin development, see the [shell reference](https://github.com/omacom/omarchy/blob/quattro/docs/omarchy-shell.md) and [first-party plugin catalog](https://github.com/omacom/omarchy/blob/quattro/shell/plugins/README.md).
 
 ## Sharing yours with the world