What is swift-refactor?

A guide for reorganizing Swift and SwiftUI iOS code into a modular MVVM-C structure. MVVM-C separates screens, their state, and navigation, while modules keep parts of an app's code independent.

It helps migrate iOS projects, structure Swift packages, define ViewModels and coordinators, and keep data access separate from screens.

It gives refactoring work a fixed set of boundaries and dependency rules for separating app, feature, data, and domain code.

swift-refactor — Skill for Claude Code and Codex by pproenca

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 pproenca/dot-skills --skill swift-refactor

Clone the repo

git clone --depth 1 https://github.com/pproenca/dot-skills

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.

README.md

[![agentmods](https://agentmods.dev/badge/skills/pproenca/dot-skills/swift-refactor/github.svg)](https://agentmods.dev/skills/pproenca/dot-skills/swift-refactor)

Your own site

<a href="https://agentmods.dev/skills/pproenca/dot-skills/swift-refactor"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/swift-refactor/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.

Your own site · 80×15

<a href="https://agentmods.dev/skills/pproenca/dot-skills/swift-refactor"><img src="https://agentmods.dev/badge/skills/pproenca/dot-skills/swift-refactor.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 98 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 2,746 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

NVIDIA SkillSpector pass 7 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.

Model	Per session	Once invoked
Fable 5.1	$0.00098	$0.02746
Opus 5	$0.00049	$0.01373
Sonnet 5	$0.00020	$0.00549
Haiku 4.5	$0.00010	$0.00275

Measured 6d ago against content hash 54076ad9eed9, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade A, and why

swift-refactor 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 6d 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.

skills/.experimental/swift-refactor/SKILL.md · 188 lines

How it starts

The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Swift/SwiftUI Refactor (Modular MVVM-C)

Comprehensive refactoring guide for migrating Swift/SwiftUI code to modular MVVM-C with local SPM package boundaries and App-target composition root wiring.

Mandated Architecture Stack

┌───────────────────────────────────────────────────────────────┐
│ App target: DependencyContainer, Coordinators, Route Shells   │
├───────────────────────────────────────────────────────────────┤
│ Feature modules: View + ViewModel (Domain + DesignSystem deps)│
├───────────────────────────────────────────────────────────────┤
│ Data package: repositories, remote/local stores, sync, retry  │
├───────────────────────────────────────────────────────────────┤
│ Domain package: models, repository/coordinator/error protocols │
└───────────────────────────────────────────────────────────────┘

Dependency Rule: Feature modules never import Data and never import sibling features.

Clinic Architecture Contract (iOS 26 / Swift 6.2)

All guidance in this skill assumes the clinic modular MVVM-C architecture:

Feature modules import Domain + DesignSystem only (never Data, never sibling features)
App target is the convergence point and owns DependencyContainer, concrete coordinators, and Route Shell wiring
Domain stays pure Swift and defines models plus repository, *Coordinating, ErrorRouting, and AppError contracts
Data owns SwiftData/network/sync/retry/background I/O and implements Domain protocols
Read/write flow defaults to stale-while-revalidate reads and optimistic queued writes
ViewModels call repository protocols directly (no default use-case/interactor layer)

When to Apply

Reference these guidelines when:

Migrating from deprecated SwiftUI APIs (ObservableObject, NavigationView, old onChange)
Restructuring state management to use @Observable ViewModels
Adding @Equatable diffing to views for performance
Decomposing large views into 10-node maximum bodies
Refactoring navigation to coordinator + route shell pattern
Refactoring to Domain/Data/Feature/App package boundaries
Setting up dependency injection through DependencyContainer
Improving list/collection scroll performance
Replacing manual Task management with .task(id:) and cancellable loading

Read the full file on GitHub · 188 lines

Files

What ships with it

60 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.

6d ago First seen · 188 lines · 98 tokens per session scan A 54076ad9eed9

Subscribe to this mod's changes

swift-refactor is a skill published in the GitHub repository pproenca/dot-skills (205 stars, last pushed 24d ago), licensed MIT. It adds 98 tokens to every session and 2,746 once invoked, about $0.0005 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 2026-09-03.

Kotlin and Swift Languages Mobile

wear-compose-m3

Expert guidance for working with Wear OS Compose Material3. Use this skill when creating, updating, or migrating Wear OS projects. This includes the androidx.wear.compose.material3, androidx.wear.compose.foundation, and androidx.wear.compose.navigation3 libraries. Also working with core components such as AppScaffold…

android/skills · 101 tokens

kotlin-specialist

Provides idiomatic Kotlin implementation patterns including coroutine concurrency, Flow stream handling, multiplatform architecture, Compose UI construction, Ktor server setup, and type-safe DSL design. Use when building Kotlin applications requiring coroutines, multiplatform development, or Android with Compose.…

Jeffallan/claude-skills · 86 tokens

build-android-binary

Compile a PAM control's Android Kotlin module into the runtime-loadable DEX for a .ppmplugin. Creates a staged Gradle build with the pinned wrapper and react-android compile dependency, verifies manifest/module/package alignment and runtime-loading constraints, builds the release AAR, then runs d8 --min-api 24. Writes…

microsoft/power-platform-skills · 150 tokens

swift-refactor