mac-craft

mac-craft is a plugin for Claude Code from fledgeling-co/fledgeling-plugins. Its manifest loads nothing; the 1 skill it bundles cost 222 tokens per session together, scanned A, original, MIT.

A design and review toolkit for native macOS app interfaces, including self-contained mockups or detailed specifications for implementation.

In plain words
What is it for?
Use it to define an interface style, states, design tokens, keyboard behavior, casing, cursors, content, and artifact names, then run checks across light, dark, and increased-contrast settings.
Why use it?
It helps teams keep app chrome consistent with macOS conventions and catch measurable issues such as insufficient text contrast or incomplete interface states.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it to define an interface style, states, design tokens, keyboard behavior, casing, cursors, content, and artifact names, then run checks across light, dark, and increased-contrast settings.

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Install in Claude Code
/plugin marketplace add fledgeling-co/fledgeling-plugins
/plugin install mac-craft
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.

Clone the repo
git clone --depth 1 https://github.com/fledgeling-co/fledgeling-plugins

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.

agentmods badge for mac-craft

README.md
[![agentmods](https://agentmods.dev/badge/plugins/fledgeling-co/fledgeling-plugins/mac-craft/github.svg)](https://agentmods.dev/plugins/fledgeling-co/fledgeling-plugins/mac-craft)
Your own site
<a href="https://agentmods.dev/plugins/fledgeling-co/fledgeling-plugins/mac-craft"><img src="https://agentmods.dev/badge/plugins/fledgeling-co/fledgeling-plugins/mac-craft/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.

agentmods 80×15 button for mac-craft

Your own site · 80×15
<a href="https://agentmods.dev/plugins/fledgeling-co/fledgeling-plugins/mac-craft"><img src="https://agentmods.dev/badge/plugins/fledgeling-co/fledgeling-plugins/mac-craft.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill cost 222 tokens a session between them.
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.
Security

Grade A, and why

mac-craft 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 1mo 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.

plugins/mac-craft/.claude-plugin/plugin.json · 10 lines

What it actually says

{
  "name": "mac-craft",
  "description": "Design and review authentically native macOS application interfaces — mock windows as self-contained HTML/CSS or a token-precise spec, with a committed aesthetic direction, a state matrix, a token table an implementer can build from, and a deterministic gate that computes contrast instead of asserting it. Grounded in Apple's macOS UI kit deconstructed to exact (specified) values, the published HIG, an August 2026 four-backend research panel across 110 sources, and taste learned from 135 curated macOS apps. Ships scripts/mock_check.py: WCAG contrast computed from the declared cascade across light, dark and increased-contrast contexts with alpha compositing; a metric block cross-checked against both the kit and the stylesheet; keyboard, token-discipline, casing, cursor, self-containment, content and artifact-naming checks. It exits 2 rather than 0 when a check cannot be performed, because examined=0 is a gate that never ran. Replaces mac-design-studio and answers to that name. App icons are not designed here — they route to create-mac-icon:create-mac-icon. Chrome stays native; a free aesthetic axis mines variety in the content area via trawl:trawl at --any, with Warm Paper and Terminal Dark as runner-up rather than default, and records the chosen content world in the project diversity ledger.",
  "version": "1.5.2",
  "author": {
    "name": "Fledgeling",
    "email": "[email protected]"
  }
}
Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 222 tokens a session between them. Each is measured on its own page, and each can be installed alone.

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. 1mo ago Changed fab511f03b03
  2. 1mo ago Changed b28216acb6b3
  3. 1mo ago First seen · 10 lines scan A 09c1bca75a7e

Subscribe to this mod's changes

mac-craft is a plugin published in the GitHub repository fledgeling-co/fledgeling-plugins (2 stars, last pushed 4d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. 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.