Ready. 

This document specifies conventions for using the Hierarchical Signature System (HSS) / Leighton-Micali Signature (LMS) hash-based signature algorithm with the CBOR Object Signing and Encryption (COSE) syntax.  The HSS/LMS algorithm is described in RFC 8554. The document targets Standards Track, this the Normative Reference to the Informational RFC 8554 is a downref. The shepherd write-up makes a convincing argument why this downref is acceptable, maybe this justification could have been mentioned explicitly in the text. Otherwise this is a clear document, and Section 5 deals with the Operational Considerations. A full RFC 5706 review does not apply, but I do not see any operational or manageability issues that would prevent approval from the OPS-DIR perspective.