# HyperTwist Phase 7C MagicTile native behavior proof implementation packet

Created on `2026-06-19`

## Status

- first-party HyperTwist packet
- bounded first-party `Phase 7C` implementation slice

## Purpose

This packet lands the smallest first-party native `MagicTile` behavior proof
that can inform later renderer-port decisions without widening into renderer or
legacy host ownership.

The landed slice is:

- a first-party native behavior proof contract above the landed `Phase 7B`
  tiling bridge
- a proof probe for selected-cell focus, candidate-twist disambiguation,
  preview, commit, and timer continuity

It is not:

- a renderer port
- a `WinForms` / `OpenTK` host-shell packet
- a generic non-Euclidean runtime-base replacement

## Current authority basis

This implementation packet stands on:

- `docs/arch/HYPERTWIST_PHASE7C_MAGICTILE_NATIVE_BEHAVIOR_PROOF_PREPARATION_PACKET_2026-06-19.md`
- `docs/ops/HYPERTWIST_COMPREHENSIVE_RECONSTRUCTION_ROADMAP_2026-06-10.md`
- `docs/v6_5_deep_manual_pack/HyperTwist/ROADMAP.md`

## Landed scope

The current code now owns a bounded first-party `Phase 7C` proof seam through:

- new tiling contract and probe types for:
  - native behavior proof contract
  - native behavior proof probe
- expanded bundled tiling reference-bundle construction in:
  - `UHyperTwistTrainingTilingLibrary`
- new runtime-library accessors for:
  - bundled native behavior proof contract lookup
  - bundled proof-probe creation
  - bundled proof-probe normalization
  - bundled proof-probe JSON serialization/deserialization
- focused automation coverage in:
  - `HyperTwistMagicTilePhase7CNativeBehaviorProofTest.cpp`

The proof seam stays explicitly anchored to:

- the landed embedded-browser host decision
- the landed tiling browser-state bridge
- first-party puzzle-state and timer continuity rather than renderer ownership

## Why this is still intentionally bounded

This packet proves the missing native behavior seam, but it still defers:

- native spherical or hyperbolic renderer ownership
- `WinForms` / `OpenTK` host-shell ownership
- generic non-Euclidean runtime replacement

## Validation

Build validation:

- `Build.bat UnrealHyperTwistEditor Win64 Development -Project='C:\HyperTwist_worktrees\phase10validate\UnrealHyperTwist\UnrealHyperTwist.uproject' -WaitMutex -NoHotReloadFromIDE -NoUba`
- result on `2026-06-19`: `Result: Succeeded` with UnrealBuildTool `Total execution time: 3069.89 seconds` on isolated worktree `C:\HyperTwist_worktrees\phase10validate`

Focused automation validation:

- `Automation RunTests HyperTwist.FirstParty.MagicTile.Phase7C`
- result on `2026-06-19`: exported `Saved\AutomationReports\Phase7C-NativeBehaviorProof` with all `3` `HyperTwist.FirstParty.MagicTile.Phase7C.*` tests passing

Regression automation validation:

- `Automation RunTests HyperTwist.FirstParty.MagicTile`
- `Automation RunTests HyperTwist.Browser`
- `Automation RunTests HyperTwist.Permissive.MagicTile`
- result on `2026-06-19`: exported `Saved\AutomationReports\Phase7-MagicTile` with all `7` `HyperTwist.FirstParty.MagicTile.*` tests passing, `Saved\AutomationReports\Browser-Rerun` with all `4` `HyperTwist.Browser.*` tests passing, and `Saved\AutomationReports\Phase7-Permissive-MagicTile-Rerun` with all `6` `HyperTwist.Permissive.MagicTile.*` tests passing

Expected covered tests:

- `NativeBehaviorProofContract`
- `NativeBehaviorProofProbeCreation`
- `NativeBehaviorProofProbeSerialization`

## Queue effect

This packet consumes the bounded first-party `Phase 7C` proof slice.

`MagicTile` still remains partially incorporated:

- landed now:
  - tiling topology and geometry-family contract
  - transform-aware macro remapping contract
  - embedded-browser host decision
  - tiling browser-state bridge
  - native behavior proof contract and proof probe
- still deferred:
  - renderer-port ownership
  - legacy host-shell ownership
  - broad non-Euclidean runtime replacement

The next renderer-facing move, if ever reopened, must be a separate explicit
decision packet rather than an automatic continuation. That decision is now
captured in
`docs/arch/HYPERTWIST_PHASE7D_MAGICTILE_RENDERER_PORT_DECISION_PACKET_2026-06-19.md`.
