swiftui-performance-audit SKILL.md skillA
swiftui-performance-audit 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/swiftui-performance-audit@git:20260713.4950395Pins git:20260713.4950395 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/swiftui-performance-audit/SKILL.md- Versions recorded
- 4
- Latest version
- git:20260713.4950395, committed Jul 13, 2026
- First version recorded
- Jun 17, 2026
- Size
- 7,555 bytes
- Repository stars
- 5
- License
- MIT
Audit and improve SwiftUI runtime performance. Use for requests to diagnose slow rendering, janky scrolling, high CPU/memory usage, excessive view updates, or layout thrash in SwiftUI apps.
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
# SwiftUI Performance Audit ## Overview Audit SwiftUI view performance from instrumentation and baselining to root-cause analysis and concrete remediation steps. ## Workflow Decision Tree 1. **If user provides code**: Start with Code-First Review 2. **If user only describes symptoms**: Ask for minimal code/context, then Code-First Review 3. **If code review is inconclusive**: Guide user to profile with Instruments ## 1. Code-First Review ### Collect - Target view/feature code - Data flow: state, environment, observable models - Symptoms and reproduction steps ### Focus On - View invalidation storms from broad state changes - Unstable identity in lists (`id` churn, `UUID()` per render) - Heavy work in `body` (formatting, sorting, image decoding) - Layout thrash (deep stacks, `GeometryReader`, preference chains) - Large images without downsampling - Over-animated hierarchies (implicit animations on large trees) - Non-lazy containers (`VStack`/`HStack`) holding large collections instead of `LazyVStack`/`LazyHStack` - Async work in `.task` without relying on its automatic cancellation when the view disappears …
Read the whole file at its exact version.
How to install
mdr add patrickserrano/lacquer/swiftui-performance-audit@sha256:2be6a9888590df57The line at the top of this page pins the label git:20260713.4950395, 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_vrk5fla5ki62xiub)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 4 versions of this file, between Jun 17, 2026 and Jul 13, 2026, about one every 9 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260713.4950395 latest | 2026-07-13 | 4950395 | 7,555 B | A | view · diff |
| git:20260711.5ae0eb9 | 2026-07-11 | 5ae0eb9 | 7,437 B | A | view · diff |
| git:20260711.1160782 | 2026-07-11 | 1160782 | 4,650 B | A | view · diff |
| git:20260617.2b85357 | 2026-06-17 | 2b85357 | 4,642 B | A | view |
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 (7555 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_vrk5fla5ki62xiub GET https://markdownregistry.com/api/v1/resolve?ref=patrickserrano/lacquer/swiftui-performance-audit GET https://markdownregistry.com/api/v1/blob/2be6a9888590df57409f19a6071f03f48491c17f7b29f1383d3603036f5e5ae9
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.
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