MGS1044: a spell override replaces nothing usable
A path: entry in magus.yaml redirects a spell import to a workspace directory, and
that directory cannot stand in for the spell:
[error] [MGS1044] magus.yaml spells.magus/spell/go: path spells/go holds no spell.buzz,
so there is no spell to replace it with
The same code covers an embedded spell's replacement that declares another name
(holds the spell "mygo", not "go"), and an override of magus/spell/<name> for a name
this magus does not ship.
Why
An override is declared, like Go's replace, so the import string never changes and
the one line in magus.yaml is what a reviewer sees. That line has to point at a real
replacement. A copy of an embedded spell takes over the embedded spell's registry entry,
so every use of the name runs the copy; a copy under another name would leave the name
bound to nothing it declares.
What to do
Point path at the directory holding the copy's spell.buzz, relative to magus.yaml.
For an embedded spell, keep mgs_getName() returning the embedded spell's name, and
check the name exists with magus describe spells. See
Remote spells.