{"file": ".trellis/spec/blender/module-structure.md", "reason": "Defines bpy-layer module boundaries and feature module responsibilities for extracting roads."}
{"file": ".trellis/spec/blender/asset-generation.md", "reason": "Defines MeshBatch usage, material order sensitivity, and deterministic asset-generation constraints."}
{"file": ".trellis/spec/pipeline/layer-registry.md", "reason": "Defines ROAD_LAYERS / SCENE_LAYERS cross-language ordering contract and check_layers warning behavior."}
{"file": ".trellis/spec/guides/artifact-parity-guide.md", "reason": "Defines mandatory before/after parity validation for pure Blender scene refactors."}
{"file": ".trellis/spec/guides/cross-layer-thinking-guide.md", "reason": "Defines cross-layer road layer and stage-output contract risks."}