Supported versions (spike decisions)

Last verified: 2026-07-13
Unity editor: 6000.3.7f1
Addressables package: 2.2.2 (pinned in host Packages/manifest.json)

API verification

API	Status	Notes
ResourceManager.RegisterDiagnosticCallback	Removed in 2.2.2 public API	Layer 2b (Completed / Destroyed) is primary channel
AsyncOperationHandle.Completed / Destroyed	Expected stable	Subscribed in PerHandleEventBridge
GetHashCode / Equals / IsValid / DebugName	Expected stable	Handle identity only — no private reflection

Runtime defaults

• Verbose stack traces: off by default (captureStackTraces: false in ILPP JSON)
• Lifecycle channels: both diagnostic callback and per-handle events enabled
• Minimum Addressables: 1.20+ recommended; 2.x validated in host project

Follow-up spike

Re-run spike when bumping Addressables major version or Unity LTS target.