swiftui-performance-audit

swiftui-performance-audit is a skill for Claude Code, Codex from duyet/codex-claude-plugins. It costs 32 tokens per session (1,040 once invoked), scanned A, original, no licence file.

A code-first review of SwiftUI runtime performance. It looks at problems such as slow screen updates, uneven scrolling, costly recalculations, and cases that may need profiling.

In plain words
What is it for?
Use it to investigate slow rendering, scrolling that stutters, expensive updates, or the need for profiling.
Why use it?
It helps locate likely causes of a sluggish interface before or alongside detailed performance measurement.

Skill for Claude CodeCodex

Part of the build-ios-apps plugin — 12 skills shipped together

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.

agentmods
npx agentmods add skills/duyet/codex-claude-plugins/swiftui-performance-audit
Any agent
npx skills add duyet/codex-claude-plugins --skill swiftui-performance-audit
Clone the repo
git clone --depth 1 https://github.com/duyet/codex-claude-plugins

Made for: Claude Code, Codex.

Or install build-ios-apps, the plugin that ships this one along with the rest of its 12 skills.

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 swiftui-performance-audit

README.md
[![agentmods](https://agentmods.dev/badge/skills/duyet/codex-claude-plugins/swiftui-performance-audit.svg)](https://agentmods.dev/skills/duyet/codex-claude-plugins/swiftui-performance-audit)
Your own site
<a href="https://agentmods.dev/skills/duyet/codex-claude-plugins/swiftui-performance-audit"><img src="https://agentmods.dev/badge/skills/duyet/codex-claude-plugins/swiftui-performance-audit.svg" alt="Measured on agentmods" height="20"></a>
Per session 32 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 1,040 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin unknown 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 $0.00032 $0.01040
Opus 5 $0.00016 $0.00520
Sonnet 5 $0.00006 $0.00208
Haiku 4.5 $0.00003 $0.00104

Measured 4d ago against content hash 705a1ef855b0, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

swiftui-performance-audit 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 4d 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.

build-ios-apps/skills/swiftui-performance-audit/SKILL.md · 115 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

Files

What ships with it

3 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. 4d ago First seen · 115 lines · 32 tokens per session scan A 705a1ef855b0

Subscribe to this mod's changes

swiftui-performance-audit is a skill published in the GitHub repository duyet/codex-claude-plugins (14 stars, last pushed yesterday), with no licence file. It adds 32 tokens to every session and 1,040 once invoked, about $0.0002 per session on Opus 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 2026-08-30.

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