THE BUG: GLB_MAGIC was 0x4655_4C67, which spells "gLUF" — not "glTF"
(0x4654_6C67). The magic check therefore rejected EVERY REAL GLB, probe()
returned defaults, and the entire 4,442-model library indexed with
rigged:false, animated:false, size:None. Size filters silently matched
nothing; no model was ever detected as rigged. Any claim made from that
metadata — including "Kenney has essentially no rigging" — was measuring a
no-op, not the catalogue.
It stayed invisible because THE TEST FIXTURE WROTE THE SAME WRONG MAGIC, so
the test and the bug agreed with each other. Fixing the constant broke that
test, which is exactly how a fixture should behave once it stops encoding the
defect. A second bug sat behind it: bounds() searched for "max" only AFTER
"min", but Kenney's exporter writes max first, so bounds would have failed
even with the magic fixed. Both fixed, both with regression tests.
Consequence: the previously-reported 120 ms index build was timing a no-op.
Real probing is ~1.8 s for 5,309 models, now cut to the declared JSON chunk
and parallelised across <=8 threads (std-only, order preserved,
deterministic). The proper fix is caching probes by path+mtime — NOT done, and
the perf bound is now 12 s with a comment saying why rather than a tight
number the test cannot control under contention.
KIT INVENTORY — 23 kits, 2,064 tiles, grouped so a query returns a coherent
visually-matching set instead of one tile from each of five kits. Tile size is
the MEDIAN horizontal extent (kits ship occasional double-width pieces, and a
mean lands between grid pitches — a value no tile uses). Highlights:
city-kit-roads 72 tiles @1.00, coaster-kit 183 @4.00, tower-defense-kit 160
@1.00, marble-kit 162 @1.20, platformer-kit 153 @1.00, modular-buildings 108
@1.00, racing-kit 112 @1.05. The most useful single fact: modular-dungeon,
-cave and -space kits have IDENTICAL role histograms — one layout algorithm
drives all three and the kit choice is pure theming.
Honest failure: city-kit-commercial (41) and city-kit-industrial (25) yield
ZERO roles — their files are building-a..building-z, whole buildings with no
role vocabulary. Grid-placeable but not composable; arguably not kits.
Adjacency ships as DATA (ROLE_ADJACENCY) for the composition layer and is
deliberately coarse: Kenney filenames say what a piece IS, never which edges
are open, so anything finer would be invented. Also added: role/kit/clips/
joints on entries, kits()/kit_tiles() grouping, a find_kit agent tool (<2 KB
so the AI can discover a coherent set before composing), and composition-intent
vocabulary.
Inert per the Kenney-only scope cut: clip extraction, Quaternius source
support, .gltf support — tested and harmless. 64 fetched Quaternius models
were deleted after verifying they parse (46 joints/13 clips).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
