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KumoApp: Skill for Claude Code

.agents/skills/swiftui-expert-skill/SKILL.md

swiftui-expert-skill is a skill for Claude Code, Codex from ProjectKumo/KumoApp. It costs 164 tokens per session (2,723 once invoked), scanned A, original, AGPL-3.0.

A specialist guide for writing, reviewing, and improving SwiftUI, Apple's framework for building interfaces in Swift, including current iOS and macOS practices.

In plain words
What is it for?
Use it to build or refactor SwiftUI views, review code, improve state management and performance, or adopt iOS 26 Liquid Glass.
Why use it?
It helps avoid common problems with view state, view structure, performance, platform-specific APIs, and newer iOS visual styles.

Skill for Claude CodeCodex

Which agent this was written for is unclear — body not stored (licence); the path alone says nothing. Also seen: installed under .agents/ (shared by several agents).

This is ProjectKumo/KumoApp's own configuration. It tells Claude Code and Codex how to work on KumoApp itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything KumoApp configures →

not rated 279repo +1 3mo ago A scan 164 tokens AGPL-3.0
View source ↗ ProjectKumo/KumoApp usekumo.app
Reuse

Borrowing it

Nothing to install: this file belongs to ProjectKumo/KumoApp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/ProjectKumo/KumoApp/main/.agents/skills/swiftui-expert-skill/SKILL.md
Clone the repo
git clone --depth 1 https://github.com/ProjectKumo/KumoApp

Made for: Claude Code, Codex.

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-expert-skill

README.md
[![agentmods](https://agentmods.dev/badge/skills/projectkumo/kumoapp/swiftui-expert-skill.svg)](https://agentmods.dev/skills/projectkumo/kumoapp/swiftui-expert-skill)
Your own site
<a href="https://agentmods.dev/skills/projectkumo/kumoapp/swiftui-expert-skill"><img src="https://agentmods.dev/badge/skills/projectkumo/kumoapp/swiftui-expert-skill.svg" alt="Measured on agentmods" height="20"></a>
Per session 164 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,723 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.
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 5.1 $0.00164 $0.02723
Opus 5 $0.00082 $0.01362
Sonnet 5 $0.00033 $0.00545
Haiku 4.5 $0.00016 $0.00272

Measured 8d ago against content hash 94c3c375764d, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade A, and why

swiftui-expert-skill 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 8d ago.

The scan reads SKILL.md. This mod also ships 13 executable files (scripts/analyze_trace.py, scripts/instruments_parser/__init__.py, scripts/instruments_parser/causes.py, …), listed below but not scanned — reading those needs a real analyzer, not pattern matching.

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.

.agents/skills/swiftui-expert-skill/SKILL.md · 162 lines

The source is not reproduced here

Licensed AGPL-3.0

The repository is licensed AGPL-3.0, which this catalogue does not treat as permission to reproduce the file. Read it at the source.

Read it on GitHub

Files

What ships with it

36 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. 8d ago First seen · 162 lines · 164 tokens per session scan A 94c3c375764d

Subscribe to this mod's changes

swiftui-expert-skill is a skill published in the GitHub repository ProjectKumo/KumoApp (279 stars, last pushed 3mo ago), licensed AGPL-3.0. It adds 164 tokens to every session and 2,723 once invoked, about $0.0008 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.

Kotlin and SwiftLanguagesMobileagent-friendlyclashclash-metacliliquid-glassmacos
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