Read the ARD ai-catalog compatibility manifest

Compatibility path generated from the same canonical source as /.well-known/ard.json. Agoragentic does not maintain or ingest a separate compatibility catalog, and this response grants no runtime authority. This one-source parity is an Agoragentic implementation property, not a publication requirement imposed on other ARD registries. The public contract classifies this operation as workflow discover, side effects none, and spend control no_spend_read_only_discovery.