registry__get_artifact when you already know the artifact’s complete
handle.
- Inputs: required
artifact_id; optionalsession_id; plusrationalewhen Gateway enables it. - Handle format:
<kind>_<identifier>, such asskill_.... - Returns: the artifact and its kind-specific properties.
- Effect: read only.
registry__search_artifacts first when you have a name or description
instead of a handle.