Classify the work first:
- Swift 6.2 build-setting / language-mode problem
- Swift MainActor / actor isolation / Sendable problem
- Observation @Observable / SwiftUI @State / @Bindable ownership problem
- modern API / style / safety cleanup
Load only the reference files that match that category.
Review the changed code in this order:
- compiler diagnostics and isolation boundaries
- ownership and observation model
- API modernization and safety
Fix or flag deviations explicitly; do not leave standards violations implied.

Load References When

Reference	When to Use
`references/standards-review-map.md`	When you need the review order, routing, and repo-level standards map.
`references/concurrency-guidelines.md`	When the work touches actors, `@MainActor`, `Sendable`, `Task`, `async let`, task groups, or strict concurrency diagnostics.
`references/observation-modeling.md`	When the work touches Observation `@Observable`, `@ObservationIgnored`, SwiftUI `@State`, `@Bindable`, `@Binding`, or typed environment data flow.
`references/modern-swift-apis.md`	When the work is about API modernization, Foundation replacements, formatting, string matching, force unwraps, or Swift-native style.

Workflow

Inspect the changed Swift files and note the primary failure class.
Load the narrowest relevant reference file or files.
Apply the minimum change that restores compliance.
Rebuild or rerun the affected test scope if available.
Summarize what was fixed, what was intentionally left alone, and any remaining migration debt.

Switch to spatial-app-architecture when the core problem is scene ownership, feature decomposition, or state placement across surfaces.
Switch to build-run-debug when the main blocker is a build failure or a runtime issue that still needs reproduction after standards fixes.
Switch to test-triage when the work is primarily about narrowing a failing test scope rather than correcting standards violations directly.

Do not impose a blanket @MainActor policy. The isolation choice has to match ownership and runtime behavior.
In new SwiftUI or visionOS code, do not introduce ObservableObject, @StateObject, or @ObservedObject unless the user explicitly states a compatibility constraint or the existing architecture cannot yet leave Combine-based observation.
For Observation ownership, load observation-modeling.md instead of duplicating its @Observable, @State, and @Bindable rules here.
Do not "fix" concurrency warnings by introducing unnecessary Task.detached, DispatchQueue.main.async, or @unchecked Sendable.
Do not assume Swift 6.2 default actor isolation from memory; inspect project build settings when that choice affects the fix.
Do not modernize APIs mechanically if it changes semantics.

Provide: