A mod ship file now holds a HullData at mod-hull:<id> and the ShipAuthoring
visual package at mod-ship:<id>. HullData.Visual (key 32) is the typed ref
between them; ShipAuthoring.Hull (key 1) is retired.
- One joint validator over (hull, visual) is the only semantic check; Load
owns the file structure (one hull, one visual, deterministic keys).
- Compose copies the mod store's records verbatim, so the derived catalog
holds one hull per mod ship.
- ship_cc.py edits the hull record's slots directly; the body[HULL_SLOT]
indirection is gone.
- The package fixture is generated from ShipAuthoringTests.Fixture() (glTF
scene included) and exported when AETHERIA_SHIP_FIXTURE_DIR is set.
Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
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