What is markout CLAUDE.md?

Repository instructions for building, testing, and launching Markout, a macOS app written in Swift. The project file is generated from project.yml by XcodeGen.

Use them to generate the Xcode project, build the app, launch it, or run all tests and individual Swift test cases.

They explain how to recreate the ignored Xcode project and run the full test suite or one selected test.

How maxmilian/markout configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to maxmilian/markout. 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/maxmilian/markout/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/maxmilian/markout

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/maxmilian/markout/claude-md/github.svg)](https://agentmods.dev/instructions/maxmilian/markout/claude-md)

Your own site

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

Per session 1,401 This file is loaded in full into every session.

When invoked 1,401 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	$0.01401	$0.01401
Opus 5.5	$0.00560	$0.00560
Sonnet 5.5	$0.00280	$0.00280
Haiku 4.5	$0.00140	$0.00140

Measured 2mo ago against content hash d347690af086, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

markout 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 · 60 lines

How it starts

The opening of the file, as written. The whole thing — 60 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, test, run

The Xcode project is generated from project.yml by XcodeGen and is git-ignored — always regenerate after changing project.yml, adding/removing source files, or on a fresh checkout.

brew install xcodegen                 # one-time
xcodegen generate                     # (re)create Markout.xcodeproj

# full test suite (Swift Testing)
xcodebuild test -project Markout.xcodeproj -scheme Markout \
  -destination 'platform=macOS' -derivedDataPath .build/dd

# a single suite or test
xcodebuild test -project Markout.xcodeproj -scheme Markout -destination 'platform=macOS' \
  -only-testing:MarkoutTests/MarkdownFormatterTests
xcodebuild test ... -only-testing:MarkoutTests/MarkdownFormatterTests/boldWrapsSelection

# build and launch the app
xcodebuild build -project Markout.xcodeproj -scheme Markout \
  -destination 'platform=macOS' -derivedDataPath .build/dd
open .build/dd/Build/Products/Debug/Markout.app

There is no linter configured. Target is macOS 14.0, Swift 5.9, ad-hoc signed (no sandbox entitlement).

Vendored preview assets (offline constraint)

The preview renders in a WKWebView with no network access — highlight.js, KaTeX (+fonts), and Mermaid are vendored under Resources/PreviewAssets/ and loaded relative to Bundle.main.resourceURL. Never reference a CDN.

project.yml bundles Resources/PreviewAssets as a folder reference (type: folder) so the katex/, highlight/, mermaid/, themes/ subdirectory structure is preserved in the app bundle. Adding it as a normal resource flattens the tree and breaks both the relative <script src="PreviewAssets/…"> paths and Bundle.main.url(forResource:"themes", subdirectory:"PreviewAssets") — and causes "Multiple commands produce" build errors on the duplicate .gitkeep/default.css names.
To bump versions, edit the pins in Resources/PreviewAssets/fetch-assets.sh and run it on a networked machine; record versions/licenses in VERSIONS.md.

Read the full file on GitHub · 60 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 · 60 lines · 1,401 tokens per session scan A d347690af086

Subscribe to this mod's changes

markout CLAUDE.md is an instructions file published in the GitHub repository maxmilian/markout (13 stars, last pushed 2mo ago), licensed MIT. It adds 1,401 tokens to every session, about $0.0056 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 2026-08-31.

katex macdown macos markdown markdown-editor mermaid

markout CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
markout CLAUDE.mdmaxmilian/markout	Instructions file	13	2mo ago	MIT	A	1,401	Claude Code
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vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	5,685	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	3,093	GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscode	Instructions file	195k	today	MIT	A	2,022	GitHub Copilot

markout: Instructions file for Claude Code