The Driver wants MapLibre as the default everywhere, on cost and on how it
looks, with Mapbox supported as an explicit choice.
One line decided it. resolveMapProvider read
explicit || (token present ? 'mapbox' : 'maplibre')
so merely HOLDING a Mapbox token selected Mapbox. That conflated two different
things: having a token is a capability, wanting Mapbox is a decision, and only
the decision belongs in this function. It now reads explicit || 'maplibre'.
The token is still honoured for what it is — with provider:'mapbox' it
authenticates the map, and the token argument stays in the signature because
callers pass one they hold outside the config. It simply no longer votes.
The migration surface is exactly one shape: a host that pasted a real token into
a published embed snippet and set no provider. All 36 shipped snippets carry a
tk placeholder and no provider key, so any host who filled one in is in it. An
unfilled snippet was already MapLibre, because hasMapToken rejects YOUR_
placeholders, and the DX Life branches pass no token at all. Such a host keeps
Mapbox by adding "provider":"mapbox"; ?provider= and window.MAP_PROVIDER are
unchanged.
The gate's four token-selects-Mapbox assertions were the old specification, so
they are inverted rather than deleted — the diff should show what changed for
whom. Two are added: the opt-in still works with a token in hand, which is the
path a migrating host takes, and a real token is still SEEN, asserted apart from
the engine because otherwise the engine could be right while authentication
broke silently.
check:map-props-unit was not in gates:pre, so it proved nothing on a normal run.
It is now, and the suite reads 32 of 32 with it named.
