apple-web-app

Websites and web apps on Apple devices

Choose the scope

Use this skill to give any website or web app a good experience on iPhone and

iPad, in Safari itself or installed to the Home Screen, and for macOS Safari Add

to Dock UI. Service workers, offline caching, background sync and push

implementation belong elsewhere.

Infer the platform, requested outcome and existing architecture from the task

and project. Ask only when a missing detail materially changes the solution.

Apply guidance relevant to that platform and symptom. Preserve working layout,

authentication and product choices unless they cause the requested issue. User

instructions take precedence over this skill's defaults.

• Implement or debug: read the matching reference, make the focused change,

and check its affected behavior and likely regressions.

• Audit: use the

conformance checklist ↗ for all

applicable recommendations. Report findings before modifying the site unless

the user has also asked for fixes.

• Maintain this skill: follow maintenance.md ↗.

Ordinary site work does not require a skill update or upstream handoff.

Read only relevant references

| Platform or problem | Reference |

| :------------------------------------------------------------- | :------------------------------------------------------------------------------------------------------------------------------------ |

| Mac Dock icons, title bar, display mode, navigation or storage | macos-add-to-dock.md ↗ |

| iOS head tags, manifest integration or icons | head-and-icons.md ↗ |

| iOS safe areas, scroll roots, cold launch or touch styling | layout-and-touch.md ↗ |

| iOS status bar, Safari bar tinting or light/dark appearance | theme-color-and-status-bar.md ↗ |

| iOS overlays, full-screen dims, keyboard or scroll locking | overlays-and-keyboard.md ↗ |

| iOS startup images | splash-screens.md ↗; read ios-devices.md ↗ when generating or checking sizes |

| Install hints, installed navigation or storage continuity | install-ux.md ↗ |

| A suspected iOS release regression | ios-26-notes.md ↗ |

| Translating a relevant recipe into existing Tailwind v4 code | tailwind-css-v4.md ↗ |

A Mac-only task starts with the Mac reference. Do not generate iOS startup

images or add iOS safe-area work for it. Source: WebKit; Joe Bell, as recorded

in macos-add-to-dock.md ↗.

Essential constraints and evidence

• A zero safe-area inset is valid. Keep controls usable without assuming a

positive top inset; never hide an app waiting for one. Source: Joe Bell;

WebKit 301994, in sources.md ↗.

• Preserve pinch zoom and text selection. Scope touch suppression to controls or

media with an intentional replacement interaction. Source: Firtman; React

Spectrum, in sources.md ↗.

• Installed apps that hide browser controls need usable navigation back or out.

Source: Firtman; Steiner, in install-ux.md ↗.

Treat documented behavior, device observations, community workarounds and

optional design preferences distinctly. Apply a version-specific workaround only

when its symptom and environment match. A reported fix or bug status is

historical evidence, not a guarantee for every later release. Read the cited

source or recheck the target build when a changing fact determines the fix.

Preserve existing test dates; do not relabel inherited findings as newly tested.

Source provenance and retained observations:

sources.md ↗.

Verify the requested outcome

Use relevant entries from the

conformance checklist ↗. Check generated

HTML, CSS, image dimensions and unauthenticated asset delivery where applicable.

Device-specific appearance needs observation on the target installed app on a

real device. Simulator or desktop emulation alone does not establish safe-area

timing, status-bar sampling or splash selection. Source: Joe Bell, in

sources.md ↗.

When hardware or authenticated runtime access is unavailable, complete the

independent checks and mark the remaining claims Unverified. State what was

checked, what failed, and the specific remaining device check. Do not expand a

focused fix into a full device matrix. Stop after the relevant checks pass

unless a failure or new change warrants more verification.