makkov harness
NewDesign Score: grade any page 0–100

Free and open source, MIT

Your agent, switched to the right skill.

A designer’s harness: routing, reviewed plugins and reports that ship. Totally free.

Install in two minutes Star on GitHub

Installs inand four more agents

The makkov-harness mark: four fused nodes around one centre

Same screen. Five skills later.

New in 0.2Design Score

Score any page’s design in one click.

Lighthouse for design. It measures a live page from 0 to 100, explains every point it takes off and writes the fix prompt for your agent. It runs in your browser, and none of the page’s data leaves it.

  • Score in one click

    Drag the bookmarklet to your bookmarks bar, then click it on any site, localhost included. 37 checks in seven categories, each issue pointed out on the page.

  • Steal the style

    Take a page’s palette, fonts, type scale, spacing and radii as DESIGN.md, CSS variables, a Tailwind theme or design tokens.

  • Fix it with your agent

    Paste the fix prompt into any agent, or say score localhost:3000 and fix the top issues. Then score again.

Get the bookmarklet Use the skill
A sample result, drawn the way the panel shows it.

Throw the switch yourself.

Scroll, or pick a request. The routing map loads in every session and sends it to its skill.

You sayCompare these three tools

rich-report

A designed report page with tables and charts, not a wall of chat.

skill in the harnesspicked by ROUTING.md

You sayInstall this npm package

install-guard

Fetched without running and scanned. A green, yellow or red verdict comes first.

skill in the harnesspicked by ROUTING.md

You sayMake it feel like Linear

design-md-library

That product’s design system as a reference for your mockup.

skill in the harnesspicked by ROUTING.md

You sayAnimate this card

animate

Motion by Emil Kowalski’s rules: purpose, curve, duration, exit.

skill in the harnesspicked by ROUTING.md

You sayMake a release video

hyperframes

An MP4 rendered from HTML, with HeyGen’s toolkit.

skill in the harnesspicked by ROUTING.md

You sayReview this screen

interfaces

Accessibility, typography, colour, layout and copy, fixed.

companion pluginpicked by ROUTING.md

You sayBuild a landing page

Hallmark

A page that looks designed, not generated. Like this one.

companion pluginpicked by ROUTING.md

You sayWe launch next week

security-audit

Cloudflare’s whole-project security review.

companion pluginpicked by ROUTING.md

Every route lives in ROUTING.md.

Find your situation.

Pick what you are doing. Get the skill, the command and a prompt to paste.

All 72 situations

All 72 situations

You ask in plain words. You get the finished thing.

Four real outputs, shown the way they arrive.

traffic-channels.htmlrich-report
Traffic channels, Q312 weeks, sourced
Pick: paid search
Paid share by week
Channels, share and return
Paid search27%2.4×Recommended
Organic41%1.9×
Referral18%1.2×
“Compare our traffic channels”rich-report a designed page with charts, a table and a clear pick
install-guardinstall-guard
“Install this package”install-guard every check runs before anything does
release-v2.mp4hyperframes
“Make a release video”hyperframes scenes written in HTML, rendered to MP4
DESIGN.mddesign-md-library
Aa
accent
radius
density
“Make it feel like Linear”design-md-library that product’s system applied, from 84 on file

Checked at the gate.

Nothing third-party reaches your machine unread. Every piece listed here passed the same four checks and is pinned to the commit that passed.

  1. Fetched without running
  2. Scanned for risky patterns
  3. Hooks and scripts read by hand
  4. Pinned to the reviewed commit

10 reviewed9 green1 yellow0 red

Last review November 6, 2026. A weekly check flags new upstream versions in an issue. Every verdict in SECURITY.md.

Open the security index
ComponentReviewed versionWatching
SuperpowersJesse Vincent, companion7.0.2 at 22f0b46Green
interfacesJakub Krehel, companion1.17.0 at 60bf140Green
ImpeccablePaul Bakaus, telemetry on by default4.8.0 at c3bb418Yellow
HallmarkNutlope, companion2.0.0 at 407fa68Green
security-auditCloudflare, companionc1c8a8cGreen
Motion skillsEmil Kowalski, animate and four moref1090beGreen
Hyperframes skillsHeyGen, six skills0.9.9 at d21877eGreen
awesome-design-mddata behind design-md-libraryfcc7028Green
hyperframes CLInpm, for cloud renders0.9.9Green
puppeteer-corenpm, installed without scripts25.16.0Green

Four stops to board.

Pick where you work. Four steps, about two minutes, no card.

  1. Open claude.ai in a browser

    The website, not the desktop app. Added there, it lands on your account, so every computer and cloud session gets it.

  2. Customize, then Plugins

    Open Customize in the menu on the left, then its Plugins section.

  3. Add the marketplace

    Press Add, choose Add marketplace, paste this address and confirm.

    Makkov-design/makkov-harness

  4. Switch it on

    Turn on makkov-harness. Companion plugins sit in the same list, one switch each, all optional.

Then

In any chat, say run harness-onboarding. A few questions about your language, role and tools, and it is tuned to you.

This installs it on this computer only. The website route above follows your account everywhere.

  1. 1
    Add the marketplace
    /plugin marketplace add Makkov-design/makkov-harness
  2. 2
    Install the plugin
    /plugin install makkov-harness@makkov-harness

Runs where you already work.

Claude

Desktop, Claude Code and cloud, from one marketplace.

Install for Claude

Eight more agents

Codex, Cursor, Gemini CLI, Copilot, Windsurf, Cline, OpenCode and Aider, with one script.

Install guide

Chat apps

ChatGPT, Grok, DeepSeek and Gemini, as a lighter pack.

Chat pack

Put your agent on the right track. Totally free.

Open source under MIT. No plan, no trial, no key to buy. A star is all it asks, and it helps other designers find it.

Star on GitHub Install it