The old skill predated MapLibre, the universal props, the dx-maps tree and the three outputs.
plugin-designer teaches an agent to design a plugin in plugin-designs/ against the Plugin Studio:
bundle = folder = one JS file; the starter (now a real minimal map) and its exact renames; reuse
library/ first, private src/, library changes to the build owner; the universal props (engine
auto/mapbox/maplibre, locale, token, token service) with their channels in order; seven engine
rules, each from a real bug, including parsing expressions headless with
@maplibre/maplibre-gl-style-spec (a transitive dependency, so the skill says so); localization
with right to left on the element only; the five capability levels; learning from the seven
production plugins (each rule mapped to the one that shows it best); dev in the studio, the one
build, the three outputs. Reviewed by studio and exp-shepherd; every path it names exists on
main; references nothing outside this repo.
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