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# extension-guideline
## Process Isolation
Shell: no Gtk, Gdk, Adw. Prefs: no St, Clutter, Meta, Shell.
## Cleanup
Everything created in `enable()` destroyed in `disable()`. Signals cleaned.
## Signals
`connectObject` preferred. Plain `connect` only for signals that must persist across open/close.
## ESM
`import 'gi://Name'`, not `imports.gi.Name`.
## Constructor
No underscore properties in GObject constructors. Assign after.
## CSS
Only `/* */` comments.
## Try/Catch
Only file I/O, JSON parsing, regex.
## Optional Chaining
Prohibited for guaranteed objects.
