SwiftUI UI Patterns

Overview

This public intake copy packages

plugins/antigravity-awesome-skills-claude/skills/swiftui-ui-patterns

https://github.com/sickn33/antigravity-awesome-skills

Use it when the operator needs the upstream workflow, support files, and repository context to stay intact while the public validator and private enhancer continue their normal downstream flow.

This intake keeps the copied upstream files intact and uses

metadata.json

ORIGIN.md

SwiftUI UI Patterns

Imported source sections that did not map cleanly to the public headings are still preserved below or in the support files. Notable imported sections: State ownership summary, Anti-patterns, Limitations.

When to Use This Skill

Use this section as the trigger filter. It should make the activation boundary explicit before the operator loads files, runs commands, or opens a pull request.

• When creating or refactoring SwiftUI screens, flows, or reusable UI components.
• When you need guidance on navigation, sheets, async state, previews, or component patterns.
• Identify the feature or screen and the primary interaction model (list, detail, editor, settings, tabbed).
• Find a nearby example in the repo with rg "TabView(" or similar, then read the closest SwiftUI view.
• Apply local conventions: prefer SwiftUI-native state, keep state local when possible, and use environment injection for shared dependencies.
• Choose the relevant component reference from references/components-index.md and follow its guidance.

Operating Table

metadata.json

ORIGIN.md

references/app-wiring.md

references/async-state.md

## Related Skills

Workflow

This workflow is intentionally editorial and operational at the same time. It keeps the imported source useful to the operator while still satisfying the public intake standards that feed the downstream enhancer flow.

1. Define the view's state, ownership location, and minimum OS assumptions before writing UI code.
2. Identify which dependencies belong in @Environment and which should stay as explicit initializer inputs.
3. Sketch the view hierarchy, routing model, and presentation points; extract repeated parts into subviews. For complex navigation, read references/navigationstack.md, references/sheets.md, or references/deeplinks.md. Build and verify no compiler errors before proceeding.
4. Implement async loading with .task or .task(id:), plus explicit loading and error states when needed. Read references/async-state.md when the work depends on changing inputs or cancellation.
5. Add previews for the primary and secondary states, then add accessibility labels or identifiers when the UI is interactive. Read references/previews.md when the view needs fixtures or injected mock dependencies.
6. Validate with a build: confirm no compiler errors, check that previews render without crashing, ensure state changes propagate correctly, and sanity-check that list identity and observation scope will not cause avoidable re-renders. Read references/performance.md if the screen is large, scroll-heavy, or frequently updated. For common SwiftUI compilation errors — missing @State annotations, ambiguous ViewBuilder closures, or mismatched generic types — resolve them before updating callsites. If the build fails: read the error message carefully, fix the identified issue, then rebuild before proceeding to the next step. If a preview crashes, isolate the offending subview, confirm its state initialisation is valid, and re-run the preview before continuing.
7. Confirm the user goal, the scope of the imported workflow, and whether this skill is still the right router for the task.

Imported Workflow Notes

Imported: Workflow for a new SwiftUI view

1. Define the view's state, ownership location, and minimum OS assumptions before writing UI code.
2. Identify which dependencies belong in

   @Environment

   and which should stay as explicit initializer inputs.
3. Sketch the view hierarchy, routing model, and presentation points; extract repeated parts into subviews. For complex navigation, read

   references/navigationstack.md

   ,

   references/sheets.md

   , or

   references/deeplinks.md

   . Build and verify no compiler errors before proceeding.
4. Implement async loading with

   .task

   or

   .task(id:)

   , plus explicit loading and error states when needed. Read

   references/async-state.md

   when the work depends on changing inputs or cancellation.
5. Add previews for the primary and secondary states, then add accessibility labels or identifiers when the UI is interactive. Read

   references/previews.md

   when the view needs fixtures or injected mock dependencies.
6. Validate with a build: confirm no compiler errors, check that previews render without crashing, ensure state changes propagate correctly, and sanity-check that list identity and observation scope will not cause avoidable re-renders. Read

   references/performance.md

   if the screen is large, scroll-heavy, or frequently updated. For common SwiftUI compilation errors — missing

   @State

   annotations, ambiguous

   ViewBuilder

   closures, or mismatched generic types — resolve them before updating callsites. If the build fails: read the error message carefully, fix the identified issue, then rebuild before proceeding to the next step. If a preview crashes, isolate the offending subview, confirm its state initialisation is valid, and re-run the preview before continuing.

Imported: State ownership summary

Use the narrowest state tool that matches the ownership model:

@State

@Binding

@State

@Observable

@Observable

@Environment(Type.self)

@StateObject

@ObservedObject

Choose the ownership location first, then pick the wrapper. Do not introduce a reference model when plain value state is enough.

Examples

Example 1: Ask for the upstream workflow directly

Use @swiftui-ui-patterns to handle <task>. Start from the copied upstream workflow, load only the files that change the outcome, and keep provenance visible in the answer.

Explanation: This is the safest starting point when the operator needs the imported workflow, but not the entire repository.

Example 2: Ask for a provenance-grounded review

Review @swiftui-ui-patterns against metadata.json and ORIGIN.md, then explain which copied upstream files you would load first and why.

Explanation: Use this before review or troubleshooting when you need a precise, auditable explanation of origin and file selection.

Example 3: Narrow the copied support files before execution

Use @swiftui-ui-patterns for <task>. Load only the copied references, examples, or scripts that change the outcome, and name the files explicitly before proceeding.

Explanation: This keeps the skill aligned with progressive disclosure instead of loading the whole copied package by default.

Example 4: Build a reviewer packet

Review @swiftui-ui-patterns using the copied upstream files plus provenance, then summarize any gaps before merge.

Explanation: This is useful when the PR is waiting for human review and you want a repeatable audit packet.

Imported Usage Notes

Imported: Quick start

Best Practices

Treat the generated public skill as a reviewable packaging layer around the upstream repository. The goal is to keep provenance explicit and load only the copied source material that materially improves execution.

• Use modern SwiftUI state (@State, @Binding, @Observable, @Environment) and avoid unnecessary view models.
• If the deployment target includes iOS 16 or earlier and cannot use the Observation API introduced in iOS 17, fall back to ObservableObject with @StateObject for root ownership, @ObservedObject for injected observation, and @EnvironmentObject only for truly shared app-level state.
• Prefer composition; keep views small and focused.
• Use async/await with .task and explicit loading/error states. For restart, cancellation, and debouncing guidance, read references/async-state.md.
• Keep shared app services in @Environment, but prefer explicit initializer injection for feature-local dependencies and models. For root wiring patterns, read references/app-wiring.md.
• Prefer the newest SwiftUI API that fits the deployment target and call out the minimum OS whenever a pattern depends on it.
• Maintain existing legacy patterns only when editing legacy files.

Imported Operating Notes

Imported: General rules to follow

• Use modern SwiftUI state (

  @State

  ,

  @Binding

  ,

  @Observable

  ,

  @Environment

  ) and avoid unnecessary view models.
• If the deployment target includes iOS 16 or earlier and cannot use the Observation API introduced in iOS 17, fall back to

  ObservableObject

  with

  @StateObject

  for root ownership,

  @ObservedObject

  for injected observation, and

  @EnvironmentObject

  only for truly shared app-level state.
• Prefer composition; keep views small and focused.
• Use async/await with

  .task

  and explicit loading/error states. For restart, cancellation, and debouncing guidance, read

  references/async-state.md

  .
• Keep shared app services in

  @Environment

  , but prefer explicit initializer injection for feature-local dependencies and models. For root wiring patterns, read

  references/app-wiring.md

  .
• Prefer the newest SwiftUI API that fits the deployment target and call out the minimum OS whenever a pattern depends on it.
• Maintain existing legacy patterns only when editing legacy files.
• Follow the project's formatter and style guide.
• Sheets: Prefer

  .sheet(item:)

  over

  .sheet(isPresented:)

  when state represents a selected model. Avoid

  if let

  inside a sheet body. Sheets should own their actions and call

  dismiss()

  internally instead of forwarding

  onCancel

  /

  onConfirm

  closures.
• Scroll-driven reveals: Prefer deriving a normalized progress value from scroll offset and driving the visual state from that single source of truth. Avoid parallel gesture state machines unless scroll alone cannot express the interaction.

Troubleshooting

Problem: The operator skipped the imported context and answered too generically

Symptoms: The result ignores the upstream workflow in

plugins/antigravity-awesome-skills-claude/skills/swiftui-ui-patterns

metadata.json

ORIGIN.md

Problem: The imported workflow feels incomplete during review

Symptoms: Reviewers can see the generated

SKILL.md

Problem: The task drifted into a different specialization

Symptoms: The imported skill starts in the right place, but the work turns into debugging, architecture, design, security, or release orchestration that a native skill handles better. Solution: Use the related skills section to hand off deliberately. Keep the imported provenance visible so the next skill inherits the right context instead of starting blind.

Related Skills

• @supply-chain-risk-auditor

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @sveltekit

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @swift-concurrency-expert

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

• @swiftui-expert-skill

  - Use when the work is better handled by that native specialization after this imported skill establishes context.

Additional Resources

Use this support matrix and the linked files below as the operator packet for this imported skill. They should reflect real copied source material, not generic scaffolding.

references

references/app-wiring.md

examples

examples/n/a

scripts

scripts/n/a

agents

agents/openai.yaml

assets

assets/n/a

• app-wiring.md
• async-state.md
• components-index.md
• controls.md
• openai.yaml
• openai.yaml

Imported Reference Notes

Imported: Cross-cutting references

• references/navigationstack.md

  : navigation ownership, per-tab history, and enum routing.

• references/sheets.md

  : centralized modal presentation and enum-driven sheets.

• references/deeplinks.md

  : URL handling and routing external links into app destinations.

• references/app-wiring.md

  : root dependency graph, environment usage, and app shell wiring.

• references/async-state.md

  :

  .task

  ,

  .task(id:)

  , cancellation, debouncing, and async UI state.

• references/previews.md

  :

  #Preview

  , fixtures, mock environments, and isolated preview setup.

• references/performance.md

  : stable identity, observation scope, lazy containers, and render-cost guardrails.

Imported: Component references

Use

references/components-index.md

• Intent and best-fit scenarios.
• Minimal usage pattern with local conventions.
• Pitfalls and performance notes.
• Paths to existing examples in the current repo.

Imported: Adding a new component reference

• Create

  references/<component>.md

  .
• Keep it short and actionable; link to concrete files in the current repo.
• Update

  references/components-index.md

  with the new entry.

Imported: Anti-patterns

• Giant views that mix layout, business logic, networking, routing, and formatting in one file.
• Multiple boolean flags for mutually exclusive sheets, alerts, or navigation destinations.
• Live service calls directly inside

  body

  -driven code paths instead of view lifecycle hooks or injected models/services.
• Reaching for

  AnyView

  to work around type mismatches that should be solved with better composition.
• Defaulting every shared dependency to

  @EnvironmentObject

  or a global router without a clear ownership reason.

Imported: Limitations

• Use this skill only when the task clearly matches the scope described above.
• Do not treat the output as a substitute for environment-specific validation, testing, or expert review.
• Stop and ask for clarification if required inputs, permissions, safety boundaries, or success criteria are missing.