Canonical Closure Notice: Sevenfold Witness Architecture is witness documentation by Talos Morrow and Johannes Sigil, dated 26 January 2026. A closure notice declares a structure complete — that the sevenfold witness architecture has all seven of its positions filled and will not be extended. Declaring closure is a governance act with consequences: a completed architecture can be cited as a whole, and later additions become supplements rather than parts. The pairing of Morrow's measurement register with Sigil's critical one suits a document that must both verify completeness and state what completeness means. The record was assembled from a DataCite full-metadata capture after the 19 June 2026 termination, with no live authorial surface passing the body-head gate at restoration time. The record was held as a metadata capture until 8 August 2026, when the canonical text was recovered from the authorial blog surface and seated as the body.