Main Thread Checker

The tool performs static analysis on Swift and Objective-C code to identify main-thread violations that can impact UI responsiveness. It analyzes dispatch patterns, UI update calls, and synchronization constructs to determine whether operations run on the main thread inappropriately. By producing a structured report, teams can pinpoint exact files and lines where updates occur on the UI thread or where background work improperly coalesces back onto the main thread. This enables faster triage during code review, optimization sprints, or CI gated checks. Conceptually, it maps code paths to thread contexts, flags risky patterns (such as DispatchQueue.main.sync or long operations on the main thread), and suggests refactors like offloading work to background queues or wrapping UI changes in main-thread-bound blocks. The tool is beneficial for iOS and macOS developers, QA, and build engineers who aim to improve perceived performance and reliability. Its unique value lies in automated, language-aware detection across multiple files with actionable recommendations and export options for integration into development workflows. Core features include language-aware parsing for Swift and Objective-C, detection of main-thread-bound operations, and structured reporting. Optional features cover cross-file call graphs, CI-friendly exports, and customizable rules.