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uikit-expert

uikit-expert is a skill for Claude Code from ivan-magda/uikit-expert-skill. It costs 95 tokens per session (3,177 once invoked), scanned A, original, MIT.

A UIKit coding guide for Apple's iOS user-interface framework. It covers view-controller lifecycle, Auto Layout, collection views, navigation, animation, memory management, and newer iOS APIs.

In plain words
What is it for?
Use it to build, review, or modernize UIKit screens and view controllers, including layout, navigation, collection views, animations, memory handling, and performance-related improvements.
Why use it?
UIKit code can fail when setup happens at the wrong lifecycle stage, constraints are incorrect, or objects are retained unexpectedly. The guide provides review and improvement checks based on Apple's documented practices.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the uikit-expert plugin — 1 skill shipped together

not rated 8repo 4mo ago A scan Socket: passSnyk: pass 95 tokens original MIT

Good fit Use it to build, review, or modernize UIKit screens and view controllers, including layout, navigation, collection views, animations, memory handling, and performance-related improvements.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/ivan-magda/uikit-expert-skill/uikit-expert
View source ↗ ivan-magda/uikit-expert-skill
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent
npx skills add ivan-magda/uikit-expert-skill --skill uikit-expert
Clone the repo
git clone --depth 1 https://github.com/ivan-magda/uikit-expert-skill

Made for: Claude Code.

Or install uikit-expert, the plugin that ships this one along with the rest of its 1 skill.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for uikit-expert

README.md
[![agentmods](https://agentmods.dev/badge/skills/ivan-magda/uikit-expert-skill/uikit-expert/github.svg)](https://agentmods.dev/skills/ivan-magda/uikit-expert-skill/uikit-expert)
Your own site
<a href="https://agentmods.dev/skills/ivan-magda/uikit-expert-skill/uikit-expert"><img src="https://agentmods.dev/badge/skills/ivan-magda/uikit-expert-skill/uikit-expert/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for uikit-expert

Your own site · 80×15
<a href="https://agentmods.dev/skills/ivan-magda/uikit-expert-skill/uikit-expert"><img src="https://agentmods.dev/badge/skills/ivan-magda/uikit-expert-skill/uikit-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 95 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 3,177 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • Socket pass 15 Sept 2026
  • Snyk pass 15 Sept 2026
How audits are shown
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5.1 $0.00095 $0.03177
Opus 5.5 $0.00038 $0.01271
Sonnet 5.5 $0.00019 $0.00635
Haiku 4.5 $0.00010 $0.00318

Measured 2mo ago against content hash 3a279331030a, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

uikit-expert scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

uikit-expert/SKILL.md · 185 lines

How it starts

The opening of the file, as written. The whole thing — 185 lines — stays where its author put it; the contents beside it link to each section on GitHub.

UIKit Expert Skill

Overview

Favor native APIs and Apple's documented guidance. Operating principles: facts over architecture (no MVVM/VIPER/Coordinator mandates, but do separate business logic for testability); correctness first, then performance; reserve "always"/"never" for correctness, use "suggest"/"consider" for optional optimizations.

Workflows

All three modes draw on the same Core Guidelines below; each topic links to its reference file there. Pick the entry point:

  • Review — Walk the Review Checklist as pass/fail gates. For any failure, fix per the matching Core Guideline. Prioritize correctness gates (lifecycle, Auto Layout, memory, concurrency) over style; treat performance items as optional.
  • Improve — For each issue, apply the modern replacement from the Deprecated → Modern table and the matching Core Guideline. Present performance work (downsampling, prefetching, constraint-churn fixes) as optional optimizations, never mandates.
  • Implement new — Build in this order, applying the relevant Core Guideline at each step:
    1. Design data flow — owned state, injected dependencies, model layer
    2. Lifecycle — one-time setup in viewDidLoad, geometry in viewIsAppearing
    3. Auto Layout — batch activation, zero churn
    4. Collection views — DiffableDataSource + CompositionalLayout + CellRegistration
    5. Navigation — all 4 appearance slots, concurrent-transition guards
    6. Animation, memory ([weak self], Task cancellation), concurrency (@MainActor)
    7. Interop, image loading, keyboard, Dynamic Type / VoiceOver / dark mode
    8. Gate iOS 26+ features with #available and sensible fallbacks

Core Guidelines

View Controller Lifecycle — see references/view-controller-lifecycle.md

  • Use viewDidLoad for one-time setup: subviews, constraints, delegates — NOT geometry
  • Use viewIsAppearing (back-deployed iOS 13+) for geometry-dependent work, trait-based layout, scroll-to-item
  • viewDidLayoutSubviews fires multiple times — use only for lightweight layer frame adjustments
  • viewWillAppear is limited to transition coordinator animations and balanced notification registration
  • Always call super in every lifecycle override
  • Child VC containment: addChild → addSubview → didMove(toParent:) — in that exact order
  • Verify deallocation with deinit logging during development

Read the full file on GitHub · 185 lines

Files

What ships with it

15 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 185 lines · 95 tokens per session scan A 3a279331030a

Subscribe to this mod's changes

uikit-expert is a skill published in the GitHub repository ivan-magda/uikit-expert-skill (8 stars, last pushed 4mo ago), licensed MIT. It adds 95 tokens to every session and 3,177 once invoked, about $0.0004 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Claude CodeDesign and UXMobileagent-skillsiosskillsswiftuikit
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