addSkillDirectory
Register an external directory containing skill subdirectories. The path is validated (it must exist and be a directory) and de-duplicated before being added. This is the recommended, strict entry point for registering third-party skill directories.
Unlike addSearchPath(), which silently accepts any path,
addSkillDirectory() throws on an invalid path. Retrieve registered directories
with getExternalPaths().
Parameters
path
Absolute or relative path to a directory containing skill subdirectories.
Returns
void — Throws an Error when the path doesn’t exist or isn’t a directory.