fn provider_install_dir(
provider_id: &str,
pinned_version: &str,
) -> Option<PathBuf>Expand description
Where a new install of provider_id goes: the shared, pinned-version dir
(backend::cli_install), which is also what resolvecli and the launch
path look in first. Honors portable / installed mode + the
AGENTMUX_HOME_OVERRIDE test override via DataPaths::from_env().