crates/ghostlight/src/lens.rs owns the eight stock lenses, each lens's
"reaches for" text and leads_with list of existing PATCH_TOOLS names, the
per-lens instruction text, LensWeights (a transparent BTreeMap<Lens, u32>
with an empty Default and no uniform constructor), and draw: a digest over
LensPreimage { world_id, command_id }, first sixteen hex as u64, modulo the
weight total, cumulative walk over Lens::ALL, Invariant error when no
weight is nonzero. Same recipe as select_band; no rand.
lib.rs declares the module, exports Lens and LensWeights, and gives the
library test module stock_weights(). ELABORATION_INSTRUCTIONS stays in
elaboration.rs (Cut 3 moves it) and becomes pub(super) so the lens text can
read it. instructions() and draw() carry cfg_attr(not(test),
expect(dead_code)) until Cut 3 reads them, following controllers.rs:759.
Nothing outside its tests reads the module yet. PATCH_TOOLS, the catalog
functions and the sidecar fixture are untouched. Builds on Windows; the
Linux build is Idunn's.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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