What is my-toybox CLAUDE.md?

A repository instruction file for Claude Code, an AI coding assistant. It records how to open, build, test, clean, and extend an iOS/macOS visual-effects app built with Swift and SwiftUI.

Use it when asking Claude Code to open the project, create a new screen, build the app, or run all or selected tests.

It gives the assistant the project's commands and conventions instead of making it guess how the codebase works.

How Koshimizu-Takehito/my-toybox configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to Koshimizu-Takehito/my-toybox. 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/Koshimizu-Takehito/my-toybox/develop/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/Koshimizu-Takehito/my-toybox

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/koshimizu-takehito/my-toybox/claude-md/github.svg)](https://agentmods.dev/instructions/koshimizu-takehito/my-toybox/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/koshimizu-takehito/my-toybox/claude-md"><img src="https://agentmods.dev/badge/instructions/koshimizu-takehito/my-toybox/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/koshimizu-takehito/my-toybox/claude-md"><img src="https://agentmods.dev/badge/instructions/koshimizu-takehito/my-toybox/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 800 This file is loaded in full into every session.

When invoked 800 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	$0.00800	$0.00800
Opus 5.5	$0.00320	$0.00320
Sonnet 5.5	$0.00160	$0.00160
Haiku 4.5	$0.00080	$0.00080

Measured 6d ago against content hash 90e78155d0cf, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

my-toybox 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 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.

CLAUDE.md · 78 lines

How it starts

The opening of the file, as written. The whole thing — 78 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md

This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.

Build & Development Commands

# Open project in Xcode
make open
# or
xed .

# Create new screen (interactive or with name)
make new-screen
make new-screen NAME=MyAnimation
make new-screen NAME=MyShader SHADER=yes

# Clean build artifacts
make clean

Build & Test (CI/Command-line)

# Build
xcodebuild -workspace MyToybox.xcworkspace -scheme MyToybox \
  -destination 'platform=iOS Simulator,name=iPhone 18 Pro' \
  CODE_SIGNING_ALLOWED=NO clean build

# Run all tests
xcodebuild -workspace MyToybox.xcworkspace -scheme MyToybox \
  -destination 'platform=iOS Simulator,name=iPhone 18 Pro' \
  CODE_SIGNING_ALLOWED=NO test

# Run specific test
xcodebuild test -workspace MyToybox.xcworkspace -scheme MyToybox \
  -destination 'platform=iOS Simulator,name=iPhone 18 Pro' \
  -only-testing MyToyboxCoreTests/MyToyboxCoreTests/testName \
  CODE_SIGNING_ALLOWED=NO

Architecture

This is an iOS/macOS visual effects showcase app (Swift 6.3, SwiftUI, Metal) with a modular SPM-based architecture.

Module Structure:

App/MyToybox/ - Xcode app entry point (App.swift → RootScreen)
Packages/Sources/MyToyboxCore/ - Shared models and utilities (ScreenMetadata, Tag, ThumbnailView, DeepLinkSheet) + URL routing
Packages/Sources/MyToyboxMedia/ - Shared media assets for shader-based screens
Packages/Sources/PlatformSupport/ - Platform abstraction utilities
Packages/Sources/AppScreens/ - Screen catalog: AppScreen.swift enum defining all available screens
Packages/Sources/ClipScreens/ - App Clip screen catalog (subset of screens)
Packages/Sources/MockScreens/ - Mock screen catalog for previews/testing
Packages/Sources/Screens/RootScreen/ - Root navigation UI shell: adaptive layouts (sidebar/split/compact)
Packages/Sources/Screens/DetailScreen/ - Detail view for individual screens
Packages/Sources/Screens/TagPicker/ - Tag filter UI: TagPicker, flow layout

Read the full file on GitHub · 78 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.

6d ago Changed · -15 tokens per session 90e78155d0cf
2mo ago First seen · 78 lines · 815 tokens per session scan A 140368df05fe

Subscribe to this mod's changes

my-toybox CLAUDE.md is an instructions file published in the GitHub repository Koshimizu-Takehito/my-toybox (118 stars, last pushed 6d ago), licensed MIT. It adds 800 tokens to every session, about $0.0032 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 2026-09-04.

Mobile Testing

my-toybox CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
my-toybox CLAUDE.mdKoshimizu-Takehito/my-toybox	Instructions file	118	6d ago	MIT	A	800	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	yesterday	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

my-toybox: Instructions file for Claude Code