Four elements shipped with this broken and nothing could see it, because every
existing gate loads a composite on its OWN generated leaf — and that leaf bakes a
token and assigns window.MAP_TOKEN, supplying the very thing under test. The
failure exists only where there is no leaf: the partner page the published embed
snippet is written for.
The gate serves the built tree on one free port and a partner page on another, so
CORS is exercised rather than assumed, and asserts per composite:
tk given only {"tk": <the token this tree bakes>}, a canvas appears and
api.mapbox.com actually serves it
provider given only {"provider":"maplibre"} and NO token, a canvas appears and
there are ZERO requests to api.mapbox.com
Zero is the assertion, not "it rendered": a build that quietly fell back to
mapbox with a baked key renders perfectly and is exactly the regression this
exists to catch.
★ IT FAILS ONLY WHERE THE EVIDENCE POINTS AT THE KNOB. The first draft failed
NINE composites for "no map canvas under a minimal config" — an accusation it had
not measured, since several of those elements simply need a `profile` key to
choose which profile to show. It now distinguishes: a token WAS supplied and the
element still says there is none, or maplibre was asked for and mapbox tiles
still loaded — those are findings. No canvas and no complaint is UNMEASURED, and
says so with the reason. A gate that red-lights other people's plugins over a
claim it cannot support is worse than no gate.
COST, because a slow gate stops being run: a flat 14s-per-case wait became a poll
for the canvas, and the provider case short-circuits when that element's tk case
drew no map — there is nothing to compare against, so a second page load was pure
waste. 5m38 -> 3m15.
GREEN on the landed tree: dashboard-plus-grid, research-map-plus-grid, stack-demo
and plugin-studio all pass both knobs, every provider case at ZERO api.mapbox.com
requests. plugin-studio only reached zero once the cap-5 shell started setting
window.MAP_PROVIDER — profile-config alone reaches the child a composite writes
config for, while the global rung reaches a map nested at any depth, which the
studio-inside-SPA-inside-composite chain needed.
gates:post is 44 steps; the quoted CLI doc is updated to match.
