Driver brief §B, BUILD-LIBRARY-CHART-LANGUAGE-TREE: promote gospel-internet's language
tree so a fork can build one from its OWN rows.
gospel's scripts/build-language-tree.mjs does two jobs in one file. The generic half is
the radial layout, the circle packing and the inverse Web Mercator projection. The other
half reads gospel-internet.json, ebible-index.json, gospel-resource-links.json and FCBH
verse scopes to classify each language g/y/r, and emits a second, purely gospel output.
Moving the file whole would have put eBible and FCBH inside library/, and a fork
building from its own roster has no eBible index -- so the literal move is the one shape
that would NOT deliver the reuse the brief asks for.
So the classification stays with its owner and arrives as `statusOf`, returning an
OPAQUE string. Nothing here knows what 'g' means; a consumer colouring by speaker count
substitutes one function instead of forking a data pipeline.
The status is written on LEAVES ONLY, which is not an omission. Rolling a parent's
colour up from its descendants is a RUNTIME decision the chart makes against the
reader's current scope -- and the scope changes as the reader filters, so baking it
would freeze one answer into the data. gospel confirmed the rollup is policy rather
than geometry: nothing in the drawing depends on a parent being the worst of its
children.
The measured constants keep their reasons: the enclosing circle is the tree's real
extent plus room for one label (sized by the deepest ring, packing wasted a third of the
board); the poster layout drops dialects (2,653 dialect slots squeezed the 858 languages
until ~40% of names could not be printed); and the share of the Mercator square is a
parameter with a measured default, because it is what decides how far a reader can zoom
out below the opening view.
check-language-tree-layout asserts INVARIANTS rather than a golden file -- a snapshot of
4,000 coordinates fails on every legitimate change and says nothing about which property
broke. Family circles do not overlap, every roster language is reachable, a missing one
warns rather than vanishing, the drawing stays inside its extent budget, the poster
layout excludes dialects, the status letter is carried through unexamined, and the same
input builds the same tree twice.
gospel's own script is untouched: they switch to this and drop their copy in the single
owner-land already planned, so nothing of theirs breaks in between.
6518fad1bb