swift-concurrency-expert
Swift Concurrency review and remediation for Swift 6.2+ codebases.
- Diagnoses and fixes actor isolation, Sendable safety, and data-race warnings through targeted edits that preserve existing behavior
- Applies minimal, concrete fixes:
@MainActorannotations, actor isolation, Sendable conformance, and completion-handler-to-async/await migrations - Triages compiler diagnostics by checking project concurrency settings, actor context, and whether code is UI-bound or background work
- Verifies fixes by rebuilding, running tests, and iteratively resolving any new warnings until the build is clean
Swift Concurrency Expert
Overview
Review and fix Swift Concurrency issues in Swift 6.2+ codebases by applying actor isolation, Sendable safety, and modern concurrency patterns with minimal behavior changes.
Workflow
1. Triage the issue
- Capture the exact compiler diagnostics and the offending symbol(s).
- Check project concurrency settings: Swift language version (6.2+), strict concurrency level, and whether approachable concurrency (default actor isolation / main-actor-by-default) is enabled.
- Identify the current actor context (
@MainActor,actor,nonisolated) and whether a default actor isolation mode is enabled. - Confirm whether the code is UI-bound or intended to run off the main actor.
2. Apply the smallest safe fix
Prefer edits that preserve existing behavior while satisfying data-race safety.
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