Xcode 27.2 ships an Instruments skill letting coding agents diagnose app hangs
JordanMorgan10 · x · 2026-10-30
timsneath revealed that Xcode 27.2 ships a new skill for coding agents to work with Instruments, plus an updated SwiftUI specialist skill — apps get better just by upgrading Xcode. The screenshot shows Claude Code (Sonnet 5.5) loading the xctrace skill, automatically analyzing a trace file, pinpointing a 350ms main-thread microhang in WindowRequestRouter.open(:), and digging into the code and full profile next — one prompt to have an agent diagnose app hangs.
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