Meta XR Unity SDK Upgrade

Upgrade the project as an evidence-driven migration. Package resolution and a clean compile are checkpoints, not proof that the app still works.

Optimize for the shortest verified path. In a time-bounded session, finish the package/provider transition, remove duplicate SDK code, migrate every known producer and consumer, and obtain a clean compile before optional cleanup or broader platform validation. Do not spend the remaining budget polishing a compile-clean project setting while a known legacy consumer or vendored SDK file remains.

For Unreal, native Android or Spatial SDK, WebXR or Immersive Web SDK (IWSDK), and general cross-platform upgrades, use hz-api-upgrade.

Required workflow