Constant INSTALL_PROVENANCE_FILE 

pub const INSTALL_PROVENANCE_FILE: &str = "install-provenance.json";

Filename of the install-time provenance stamp memstead schema install writes INTO the sealed package when the install source was an authoring directory: {"authoring_path": "<canonical path>"}. The stamp is the detection basis for the authoring-drift health axis — a schema without one (sealed pre-stamp, built-in, name- or archive-sourced install) is simply not checked, because a guessed provenance is worse than an absent one. The stamp is workspace- local by design: every package collector in this module reads selectively (schema.yaml, types/*.yaml, mem-template.json, README.md) and therefore never picks it up, and the git-ref export path excludes it by name — a published .mem archive never carries another machine’s filesystem path.