Filbert's round 1 (comment 29634) and Sage's N3 ruling (sage-1474).
Row 189 also named a test T55, so row 190's is T56. webui-service.sh copy
refuses --instance like stack-copy.sh copy; TOOLS.md shows --instance on
the bus and discord usage. A named Console unit's comment names
MOSAIC_CONFIG, and the default keeps the template's line. check
--instance needs the wrapper's MOSAIC_CONFIG line. TOOLS.md says an
existing directory keeps its mode.
--instance NAME on the shell entry points through scripts/instance.sh;
per-instance config, data root and marker, units, wrapper and ports;
the claim checks in mosaic-config.mjs; the guard protects every
instance's config and data root. Brief blob 4e8f1e0528, design
agents/darkwing/work/queue-190/DESIGN.md rev 3 (Filbert approved).
jason.woltje