The backend materials list shows the zjazd (meeting, by number). The
MCP save and update material tools, the README material example and the
management token test stop modelling a zjazd as a tag, and the README
describes the one-way zjazd tag migration.
The management save/update body takes is_private, author_user_id and
share_user_ids (absent keeps each; a new material gets the caller as
author), and the managed material shows them. New routes PATCH
/materials/{id}/visibility, PUT /materials/{id}/shares and GET /users,
with the MCP tools bm_manage_set_material_visibility,
bm_manage_set_material_shares and bm_manage_list_users. The /bmadmin
form gets the private switch, the author picker and shared_with.
The management API could only upsert a material on its title and course,
so a renamed note became a second material. PUT /materials/{id} applies the
same body to one material (422 when the new title and course belong to
another one), GET /materials/{id} shows a draft or published material with
its public files, and the upsert, update and validation share one path.
The README documents the management API.
