What is XcodePreviews CLAUDE.md?

A toolkit for building and capturing SwiftUI previews, which are visual samples of Apple app screens written in Swift. It works with standalone Swift files, Xcode projects, and Swift Package Manager packages.

Use it to build a SwiftUI view, capture the current simulator, or take screenshots of previews from standalone files, Xcode projects, and Swift packages.

It avoids manually setting up a preview host project just to render a screen and capture an image. For Xcode projects, it can temporarily add the required host setup and then clean it up.

How Iron-Ham/XcodePreviews configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Iron-Ham/XcodePreviews. 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/Iron-Ham/XcodePreviews/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Iron-Ham/XcodePreviews

Made for: Claude Code.

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/instructions/iron-ham/xcodepreviews/claude-md/github.svg)](https://agentmods.dev/instructions/iron-ham/xcodepreviews/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/iron-ham/xcodepreviews/claude-md"><img src="https://agentmods.dev/badge/instructions/iron-ham/xcodepreviews/claude-md/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/instructions/iron-ham/xcodepreviews/claude-md"><img src="https://agentmods.dev/badge/instructions/iron-ham/xcodepreviews/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 695 This file is loaded in full into every session.

When invoked 695 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

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	$0.00695	$0.00695
Opus 5.5	$0.00278	$0.00278
Sonnet 5.5	$0.00139	$0.00139
Haiku 4.5	$0.00069	$0.00069

Measured 2mo ago against content hash 263b7dbb8d35, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

XcodePreviews CLAUDE.md 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.

CLAUDE.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

PreviewBuild - SwiftUI Preview Capture Toolkit

A toolkit for building and capturing SwiftUI previews for visual analysis.

Quick Start

# Standalone Swift file (no external dependencies)
./scripts/preview MyView.swift

# File in an Xcode project (auto-injects PreviewHost target)
./scripts/preview ContentView.swift --project MyApp.xcodeproj

# File in an SPM package
./scripts/preview Sources/Module/MyView.swift

# Just capture current simulator
./scripts/preview --capture-only

How It Works

Project Types & Approaches

Project Type	Approach	Build Time	Script
Standalone Swift	Minimal host app	~5 seconds	`preview-minimal.sh`
Xcode project	Dynamic target injection	~3-4 seconds	`preview-tool`
SPM package	Temporary project creation	~20 seconds	`preview-tool`

Dynamic Preview Injection

For Xcode projects, the toolkit:

Parses the Swift file to extract #Preview { } content
Injects a temporary PreviewHost target into the project
Configures dependencies based on imports
Detects and includes resource bundles (Tuist, standard naming)
Builds only the required modules
Captures screenshot
Cleans up the injected target

This is much faster than building a full app scheme.

Scripts & Tools

Path	Purpose
`scripts/preview`	Unified entry point - auto-detects best approach
`scripts/preview-minimal.sh`	Build standalone Swift files
`scripts/xcode-preview.sh`	Build full Xcode project schemes
`scripts/capture-simulator.sh`	Screenshot current simulator
`scripts/sim-manager.sh`	Simulator management
`tools/preview-tool`	Swift CLI for dynamic preview injection, SPM preview, dependency resolution

Usage Examples

Standalone Swift File

./scripts/preview templates/StandalonePreview.swift

Xcode Project with #Preview

./scripts/preview Modules/Components/Chip/Chip.swift \
  --project MyApp.xcodeproj

Read the full file on GitHub · 110 lines

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.

2mo ago First seen · 110 lines · 695 tokens per session scan A 263b7dbb8d35

Subscribe to this mod's changes

XcodePreviews CLAUDE.md is an instructions file published in the GitHub repository Iron-Ham/XcodePreviews (152 stars, last pushed 4mo ago), licensed MIT. It adds 695 tokens to every session, about $0.0028 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 2026-08-30.

Mobile

XcodePreviews CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
XcodePreviews CLAUDE.mdIron-Ham/XcodePreviews	Instructions file	152	4mo ago	MIT	A	695	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	today	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

XcodePreviews: Instructions file for Claude Code