Individual skill

swift-optimise

Swift 6.2 and SwiftUI performance optimization for iOS 26 clinic architecture codebases. Covers async/await concurrency patterns, Sendable/actor isolation, view/render performance, and animation performance while preserving modular MVVM-C boundaries across App, Feature, Domain, and Data layers. Use when profiling or optimizing Swift/SwiftUI behavior in clinic modules.

skills/.experimental/swift-optimise/SKILL.md

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SKILL.mdcore · 5,078 bytes
assets/templates/_template.mddoc · 1,007 bytes
metadata.jsonasset · 1,049 bytes
references/_sections.mddoc · 1,005 bytes
references/anim-gesture-driven.mddoc · 3,166 bytes
references/anim-matchedgeometry.mddoc · 3,898 bytes
references/anim-spring.mddoc · 2,622 bytes
references/anim-transition-effects.mddoc · 1,727 bytes
references/anim-with-animation.mddoc · 2,351 bytes
references/conc-actor-for-shared-state.mddoc · 1,896 bytes
references/conc-asyncsequence-streams.mddoc · 2,290 bytes
references/conc-combine-to-async.mddoc · 3,406 bytes
references/conc-mainactor-isolation.mddoc · 2,597 bytes
references/conc-swift6-sendable.mddoc · 3,104 bytes
references/conc-task-id-pattern.mddoc · 2,699 bytes
references/perf-async-image.mddoc · 3,114 bytes
references/perf-canvas-timeline.mddoc · 3,559 bytes
references/perf-drawinggroup.mddoc · 3,538 bytes
references/perf-equatable-views.mddoc · 4,516 bytes
references/perf-instruments-profiling.mddoc · 3,439 bytes
references/perf-lazy-containers.mddoc · 3,132 bytes
references/perf-task-modifier.mddoc · 2,795 bytes
references/perf-view-decomposition.mddoc · 4,713 bytes

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# Apple Swift/SwiftUI Performance Optimization Best Practices

Comprehensive guide for Swift and SwiftUI performance optimization. Contains 19 rules across 3 categories covering modern concurrency, render performance, and animation performance. Targets iOS 26 / Swift 6.2 with @Observable and Swift 6 strict concurrency.


## Clinic Architecture Contract (iOS 26 / Swift 6.2)

All guidance in this skill assumes the clinic modular MVVM-C architecture:

- Feature modules import `Domain` + `DesignSystem` only (never `Data`, never sibling features)
- App target is the convergence point and owns `DependencyContainer`, concrete coordinators, and Route Shell wiring
- `Domain` stays pure Swift and defines models plus repository, `*Coordinating`, `ErrorRouting`, and `AppError` contracts
- `Data` owns SwiftData/network/sync/retry/background I/O and implements Domain protocols
- Read/write flow defaults to stale-while-revalidate reads and optimistic queued writes