# HyperTwist Phase 6R-D MagicTile tiling topology preparation packet

Created on `2026-05-21`

## Status

- historical same-day preparation authority
- bounded post-Phase-`6R-C` preparation slice
- the first bounded implementation slice now lands separately under:
  - `docs/arch/HYPERTWIST_PHASE6R_D_MAGICTILE_TILING_TOPOLOGY_IMPLEMENTATION_PACKET_2026-05-21.md`

## Purpose

This packet freezes the next widening order after the landed `Phase 6R-C`
`vivaansinghvi07/rubix-cube-solver` reconstruction slice.

The open task was:

- define the first bounded source-backed widening packet for `roice3/MagicTile` as the retained
  `Phase 6R-D` tiling-topology and geometry-family seam

It is not:

- a full `MagicTile` row transplant
- a `Hyperspeedcube` runtime-base replacement packet
- a transform-aware macro remapping packet
- a WinForms/OpenTK host-shell packet
- a broad non-Euclidean runtime or viewer-shell transplant
- the next speech-input / voice sidecar packet

## Current authority basis

This preparation packet stands on already-closed authority:

- `docs/HYPERTWIST_PHASE_0R_PACKET_0R_A_EVALUATION_2026-05-12.md`
- `docs/HYPERTWIST_PHASE_2R_PACKET_2R_A_OWNERSHIP_AND_ACCEPTANCE_CONTRACT_2026-05-13.md`
- `docs/REPO_LICENSE_TRACKING.md`
- `docs/arch/HYPERTWIST_PHASE6R_C_RUBIX_CUBE_SOLVER_RECONSTRUCTION_IMPLEMENTATION_PACKET_2026-05-20.md`

The key accepted routing facts are:

- `roice3/MagicTile` is the retained non-Euclidean topology and geometry-family donor immediately
  after the landed `6R-C` slice
- earliest widening route is `Phase 6R / Packet 6R-D`
- the retained donor value there is:
  - tiling topology analysis
  - non-Euclidean geometry-family descriptors
  - generalized tiling-derived puzzle loader seam
  - explicit donor attribution boundary for direct permissive use
- ownership denied there is:
  - do not let the row replace the `Hyperspeedcube` runtime anchor
  - do not widen into the WinForms/OpenTK host shell
  - do not widen into transform-aware macro remapping in the first packet
  - do not widen into broad viewer-shell or persistence-shell ownership

## Why this was the next packet

The earlier retained queue heads were already landed:

- `Phase 6R-A` `HactarCE/Hyperspeedcube`
- `Phase 6R-B` `kkoomen/qbr`
- `Phase 6R-C` `vivaansinghvi07/rubix-cube-solver`

That advanced the live queue to:

- `Phase 6R-D` `roice3/MagicTile`

with the later adjacent retained rows ordered behind it:

- the bounded speech-input / voice sidecar set

## Required result

The source-backed control pass for this packet is now complete.

The first actual `6R-D` implementation packet should:

- use the retained `0R-A` and `2R-A` authority surfaces plus the inspected `MagicTile` source
  basis
- define one bounded retained slice from `MagicTile`
- keep the slice inside the accepted non-Euclidean topology and geometry-family ownership
- widen only the first topology contract family that can stand on its own without dragging in
  macro remapping or legacy host-shell scope
- explicitly state which neighboring retained rows stay closed in that packet

## Source-backed retained basis

The queue-head decision is now source-backed rather than README-only.

Inspected retained donor basis:

- `README.md`
- `Puzzle/TopologyAnalyzer.cs`
- `Puzzle/Loader.cs`
- `Puzzle/Puzzle.cs`
- `Puzzle/Twisting/Macro.cs`
- `R3/R3.Core/Geometry/Tiling.cs`
- `R3/R3.Core/Geometry/Polytope.cs`
- `R3/R3.Core/Honeycombs/H3.cs`

Inspected first-party receiving basis:

- `UnrealHyperTwist/Source/UnrealHyperTwist/Public/HyperTwistTraining/HyperTwistTrainingLegacy4DLibrary.h`
- `UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistTrainingLegacy4DLibrary.cpp`
- `UnrealHyperTwist/Source/UnrealHyperTwist/Public/HyperTwistTraining/HyperTwistTrainingRuntimeLibrary.h`
- `UnrealHyperTwist/Source/UnrealHyperTwist/Private/HyperTwistTraining/HyperTwistTrainingRuntimeLibrary.cpp`
- `UnrealHyperTwist/Source/UnrealHyperTwist/Public/HyperTwistCore/HyperTwistCoreTypes.h`

## Narrowed 6R-D slice decision

The first widening slice was fixed as:

1. tiling topology and geometry-family contract plus loader/runtime-anchor boundary

not as the broader non-Euclidean interaction bundle.

That narrowed slice covers:

- first-party tiling package references and package checklist export
- first-party topology contract for:
  - logical face-edge-vertex counts
  - Euler characteristic
  - identification merging
  - topology-derived indexing
  - non-Euclidean geometry-family tags
- first-party loader boundary for:
  - generalized puzzle loading
  - master/slave cell preparation
  - topology-derived construction
  - runtime-anchor separation
- first-party attribution boundary for direct permissive donor use
- runtime-library accessors and focused automation coverage

## Deferred neighboring families

The first `6R-D` implementation packet must keep these capability families closed:

- transform-aware macro remapping
- deeper non-Euclidean interaction or viewer ownership
- WinForms/OpenTK host shell
- broad runtime-base replacement
- speech-input / voice sidecar work

Why this slice is first:

- `MagicTile` exposes the strongest narrow retained seam at tiling topology, geometry-family tags,
  and topology-derived loader boundaries
- current first-party code already has a separate `legacy4d` macro lane, so macro transport
  widening here would blur ownership rather than clarify it
- the runtime library lacked a dedicated tiling/topology contract even though the puzzle-family
  space already included `Tiling`

## Out of scope for the first 6R-D packet

- transform-aware macro remapping
- broad non-Euclidean viewer or editor shell
- legacy persistence shell
- runtime-base replacement above `Hyperspeedcube`
- the next speech-input / voice sidecar queue head

## Acceptance criteria

- the packet records why the live queue advanced from landed `6R-C` to `6R-D`
- the packet records that the first `6R-D` widening slice is tiling topology plus loader boundary
  only
- the packet states exact out-of-scope families for the first `6R-D` pass
- the packet preserves the direct-donor MIT attribution boundary explicitly
- the packet leaves transform-aware macros and host-shell ownership deferred

## Validation checklist

1. confirm the landed `Phase 6R-C` packet is the consumed prior queue head
2. confirm the retained `MagicTile` seam narrows cleanly to tiling topology, geometry-family tags,
   and loader/runtime-anchor boundary
3. confirm the next implementation packet is framed as bounded source-backed widening rather than a
   broad non-Euclidean transplant

That is the packet.
