WP-CLI had no way to specify a custom SSH config file when connecting to remote servers, blocking use cases like Lima (Linux on macOS) where connections require ssh -F config_file host_alias.

Changes

• php/WP_CLI/Runner.php: In generate_ssh_command, reads ssh_config from the alias config and prepends -F <path> to the SSH command args. Also adds ssh_config to the connection-specific keys skip list so it is not forwarded to the remote WP-CLI instance.
• features/aliases.feature: Adds a Behat scenario verifying -F appears in the generated SSH command when ssh_config is set.

Usage

# wp-cli.yml
@lima:
  ssh: user@lima-instance:/path/to/wordpress
  ssh_config: ~/.lima/default/ssh.config

Generates: ssh -F '~/.lima/default/ssh.config' -T -q 'user@lima-instance' 'wp ...'