Reported from a laptop running `bun run dev`: under the Plugin Studio, maps drew with no boundary
polygons and UPG-100 had no posters. The built tree was fine, and every gate measured the built tree.
Cause: a dev leaf page is /__leaf/<bundle>/<profile>. A plugin that falls back to the page-relative
'./assets' asked for /__leaf/<bundle>/assets/…, and the leaf route answered with its own HTML at
HTTP 200, so JSON.parse failed and the map drew without our data. /<tree>/assets/ was not served
in dev at all. The built leaf never hits this because its page passes assetsBase "../../assets".
- dev-plugin serves the pool at /__leaf/…/assets/ and /<tree>/assets/ too, and the dev leaf page
passes assetsBase "/assets" in its profile-config, as the built leaf passes its own.
- resolveAssetsBase's last rung is '/assets' under the dev server (import.meta.env.DEV, false in
every build); the built tree keeps './assets'.
- check:dev-assets (headless): starts a short-lived dev server for this checkout, requires
boundaries/previews/fonts/images/tables to answer 200 and not HTML at every prefix a dev page can
produce, and requires the dev leaf to carry the root-absolute assetsBase. It fails on the parent
commit (4 prefixes and both leaves) and passes here.
No Vue, no Pinia, no Mapbox. Anything reactive is a composable; anything stateful is a store.
File
Purpose
apiBaseUrl.js
Resolves the API base URL at runtime (window.MAP_APP_API_URL / VITE_API_BASE_URL)
embedBase.js
Share/embed URL ladder — the built bundle derives its tree root from its own script url (profileConfig.shareUrl / embedBaseUrl / window.MAP_EMBED_BASE_URL override) so tree-relative <bundle>/<profile>/index.html links work on any host
geoUtils.js
Centroid, bounds, validation, GeoJSON helpers
ClusterHelpers.js
Shared helpers for the two clustering utilities below
MSTClusteringUtil.js
Minimum-spanning-tree clustering for affinity blocks
NetworkClusteringUtil.js
Network-line clustering — connect nearby pins with edges
No import { ref } from 'vue' and no import mapboxgl in this folder — operate on plain
[lng, lat] arrays.
Named exports (for tree-shaking), JSDoc on every export.
Writing reactive logic or needing Mapbox APIs? That's a composable — move it to ../composables/.
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