Defaults to the bundled 'cli' role (concise, terminal-friendly output),
installed on first use by symlinking scripts/cli-agent.md into the aichat
config dir. Inherits all aichat flags and completions via --wraps; passing
--role/-r forwards unchanged. Only defined when aichat is installed.
--help prepends a banner and rewrites aichat's own help to qc.
Docs: fish-config.md 5.12 + index keywords.
