56 lines
2.0 KiB
Markdown
56 lines
2.0 KiB
Markdown
# OpenSpec Change: enterprise-gaming-r3f-building
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- **Change ID**: enterprise-gaming-r3f-building
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- **Package**: `@suaveplan/r3f-building`
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- **Category**: gaming/scene
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- **Target path**: `gaming/scene/r3f-building`
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- **Status**: PROPOSED
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- **Date**: 2026-04-24
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- **Reference spec**: `/mnt/s/web/suaveplan/enterprise/r3f-building.md`
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---
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## Summary
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Deliver `@suaveplan/r3f-building` on the genesis branch from scratch at enterprise quality. The package provides R3F building mode UI: ghost preview of the piece being placed, snap socket highlight spheres, invalid placement red tint, confirm/cancel keybind integration, and structural instability shake effect. It wires directly to `@suaveplan/building`'s `PlacementEngine` and `StructureGraph`. A `BuildingMode` component activates the placement mode context; `PlacementGhost` renders the translucent preview mesh. Genesis adds structured errors, OTel placement counter, and 100% coverage.
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---
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## Available workspace deps
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`@suaveplan/error`, `@suaveplan/building`, `@suaveplan/controller`, react, `@react-three/fiber`, `@react-three/drei`, three.
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---
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## Public API surface
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```ts
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function BuildingMode(props: BuildingModeProps): JSX.Element
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// registry, onPlaced, onCancel, controllerManager
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function PlacementGhost(props: PlacementGhostProps): JSX.Element
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function SnapIndicator(props: SnapIndicatorProps): JSX.Element
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function PlacedPieces(props: PlacedPiecesProps): JSX.Element
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function useBuildingMode(): BuildingModeCon```text
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---
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## File layout
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```text
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gaming/scene/r3f-building/
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package.json / tsconfig.json / vitest.config.ts
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src/
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index.ts / error-codes.ts
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types/common.ts + md
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context/building-mode-provider.tsx + md + test
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hooks/use-building-mode.ts + md + test
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components/
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BuildingMode/ (tsx + md + test + stories + index)
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PlacementGhost/ (tsx + md + test + stories + index)
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SnapIndicator/ (tsx + md + test + stories + index)
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PlacedPieces/ (tsx + md + test + stories + index)
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tests/integration.test.ts
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```
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