```coffeescript
# Keybindings require three things to be fully defined: A selector that is
# matched against the focused element, the keystroke and the command to
# execute.
#
# Below is a basic keybinding which registers on all platforms by applying to
# the root workspace element.

# For more detailed documentation see
# https://atom.io/docs/latest/advanced/keymaps
'.workspace':
  'ctrl-cmd-p': 'project-manager:toggle'
```

Add keybindings for windows and linux
user
```coffeescript
'.platform-darwin':
  'ctrl-cmd-p': 'project-manager:toggle'

'.platform-win32':
  'ctrl-alt-p': 'project-manager:toggle'

'.platform-linux':
  'ctrl-alt-p': 'project-manager:toggle'```
assistant