Coding Standards Enforcer

Quick Start

Use this skill whenever Swift source changes are in scope and the question is whether the code matches the repository's concurrency, observation, and modern API standards.

1. 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

1. Load only the reference files that match that category.
2. Review the changed code in this order:

- compiler diagnostics and isolation boundaries - ownership and observation model - API modernization and safety

1. Fix or flag deviations explicitly; do not leave standards violations implied.

Load References When

Workflow

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

remaining migration debt.

When To Switch Skills

• 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.

Guardrails

• 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](references/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.

Output Expectations

Provide:

• the files or symbols reviewed
• which standards category was applied
• the concrete violations fixed or still present
• the validation step used
• the next skill to use if the blocker is no longer a standards question