Reading map: a 3D hero of everything read, traced by what I highlighted

An orbiting point cloud of all 8,424 indexed passages, with the 262 highlighted
ones lit and threaded in the order they were marked. Data comes from library-rag
(chunks + embeddings) projected to 3D with UMAP; the page never touches Postgres.

Projection is `airy` (n_neighbors=50, min_dist=0.8) and the palette is `frost` --
both chosen by eye against the alternatives. Note that airy shows the underlying
book-territory structure LESS than the tight projection the pre-flight measured,
so the 0.805 k-NN purity figure describes that one, not this.

Page weight: the wrapper adds 321 B gzip to the homepage's blocking load. `three`
(127 KB gz) and the payload (56 KB gz) are a dynamic chunk fetched after render.
It fails closed -- no WebGL, no payload, or a dead fetch leaves a plain page.

The payload is a static snapshot; the 5-minute auto-build rebuilds the site, not
the data. New reading reaches this map only when export.py is re-run.

Co-Authored-By: Claude Opus 5 <[email protected]>

public/reading_umap.json

@@ -0,0 +1 @@
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