Implemented the building improvements: fitted rear windows, framed flower boxes, distinct furnishings, ceiling timbers, planted borders, and a seeded U-shaped garden-house composition.

New public interfaces cover window gardens, ceiling decoration, and footprint boundaries. The kernel, persistence, CLI, and all 200 earlier tests remain unchanged; clients need no private geometry knowledge.

Verified:

- **230 tests passed**
- **124/124 supported inputs validated**
- **5/16 stress inputs succeeded**, with all 11 limit failures retained
- **25 exterior and cutaway renders inspected**
- Paired reload and hash-seed replay passed

Buildings remain below the lodge references in richness: regular bays, repetitive roofs, nonhabitable attics, and simpler landscaping remain constraints. No serious architectural flaw was found.

[Assessment](/work/generator/workspace/reports/building-detail/ASSESSMENT.md) · [Previews](/work/generator/workspace/previews/building-detail/README.md) · [Default schematic](/work/generator/workspace/output.litematic) · [Companion](/work/generator/workspace/output.litematic.structure.json)