Build a reproducible SwiftUI Instruments experiment that separates unstable identity, expensive body work, image pipelines, invalidation, and layout costs.
Split a Swift macro into a thin plugin entry point, pure generation rules, syntax construction, and deliberate diagnostics for smaller and more stable tests.
Compare ordinary state animation, PhaseAnimator, and KeyframeAnimator, then choose the smallest model that preserves meaning, interruption, and accessibility.
Use the Lua 5.4.8 coroutine API to separate waiting intents from a scheduler, with explicit cancellation, error boundaries, and deterministic tests.
Design a reversible and validated SwiftUI editor around AttributedString, selection, formatting intents, Unicode-safe ranges, and an explicit document schema.