ios-performance-battery-patterns SKILL.md skillA
ios-performance-battery-patterns from patrickserrano/lacquer is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add patrickserrano/lacquer/ios-performance-battery-patterns@git:20260725.3f0d943Pins git:20260725.3f0d943 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- patrickserrano/lacquer
- Path
profiles/ios/skills/ios-performance-battery-patterns/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260725.3f0d943, committed Jul 25, 2026
- Size
- 2,310 bytes
- Repository stars
- 5
- License
- MIT
Use when touching widgets, animations, networking configuration, or background/observer cleanup — battery and performance patterns for WidgetKit timelines, SwiftUI animations, Low Power Mode handling, URLSession config, and NotificationCenter/Task cleanup under `@Observable`.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Battery & Performance Patterns
Apply these whenever touching widgets, animations, networking, or background work.
## Widgets
- Limit `Timeline` entries to **≤ 2** (current + one next-day refresh). More entries run the provider repeatedly and drain battery.
- Use `.atEnd` reload policy — let WidgetKit decide when to refresh.
## Animations
- Always stop animations in `.onDisappear`. Animations left running off-screen still consume CPU/GPU.
- Bind repeating animations to a `@State var isAnimating = false`: set `true` in `.onAppear`, `false` in `.onDisappear`, and pass `value: isAnimating` to `withAnimation`.
- Use `.repeatCount(N)` instead of `.repeatForever` for attention animations.
## Low Power Mode
Guard expensive operations before they start:
```swift
guard !ProcessInfo.processInfo.isLowPowerModeEnabled else { return }
```
Apply to: image preloading, background downloads, video prefetch, heavy sync.
## Network
```swift
let config = URLSessionConfiguration.default
config.allowsConstrainedNetworkAccess = false // respect Low Data Mode
config.allowsExpensiveNetworkAccess = false // avoid cellular when Wi-Fi preferred
…Read the whole file at its exact version.
How to install
mdr add patrickserrano/lacquer/ios-performance-battery-patterns@sha256:cdd18bf37cdfa867The line at the top of this page pins the label git:20260725.3f0d943, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_v63tevthy573hapu)
5 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jul 25, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2310 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
patrickserrano/lacquer · 5 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_v63tevthy573hapu GET https://markdownregistry.com/api/v1/resolve?ref=patrickserrano/lacquer/ios-performance-battery-patterns GET https://markdownregistry.com/api/v1/blob/cdd18bf37cdfa867819d3112f308a29a8213745b42da6c600646889d657ddf94
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.