theme-styling

theme-styling is a skill for Claude Code from mendixlabs/mxcli. It costs 92 tokens per session (5,132 once invoked), scanned A, original, Apache-2.0.

A guide to styling Mendix apps with SCSS, a CSS language that adds reusable features such as variables, and to managing application themes.

In plain words
What is it for?
Use it to create or apply a brand palette, edit SCSS, switch between light and dark themes, and use hot reload during development.
Why use it?
It explains where styles are compiled, how theme changes are applied, and how to diagnose styling and design-property errors.

Skill for Claude Code

Written for Claude Code: installed under .claude/. Also seen: $skill-name invocation.

Good fit Use it to create or apply a brand palette, edit SCSS, switch between light and dark themes, and use hot reload during development.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/mendixlabs/mxcli/theme-styling
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.

Any agent
npx skills add mendixlabs/mxcli --skill theme-styling
Clone the repo
git clone --depth 1 https://github.com/mendixlabs/mxcli

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 theme-styling

README.md
[![agentmods](https://agentmods.dev/badge/skills/mendixlabs/mxcli/theme-styling/github.svg)](https://agentmods.dev/skills/mendixlabs/mxcli/theme-styling)
Your own site
<a href="https://agentmods.dev/skills/mendixlabs/mxcli/theme-styling"><img src="https://agentmods.dev/badge/skills/mendixlabs/mxcli/theme-styling/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 theme-styling

Your own site · 80×15
<a href="https://agentmods.dev/skills/mendixlabs/mxcli/theme-styling"><img src="https://agentmods.dev/badge/skills/mendixlabs/mxcli/theme-styling.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 92 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 5,132 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe. Third-party audits
  • NVIDIA SkillSpector pass 7 Sept 2026
How audits are shown
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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00092 $0.05132
Opus 5 $0.00046 $0.02566
Sonnet 5 $0.00018 $0.01026
Haiku 4.5 $0.00009 $0.00513

Measured 7d ago against content hash e8cf0219b943, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-10, from the pricing page.

Security

Grade A, and why

theme-styling 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 7d 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/skills/mendix/theme-styling/SKILL.md · 421 lines

How it starts

The opening of the file, as written. The whole thing — 421 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Theme & Styling — SCSS Workflow and Caveats

When to Use This Skill

Use this skill when working with:

  • SCSS compilation, custom-variables.scss, or themesource/ directories
  • Applying or building a theme (mxcli theme apply | create | switcher)
  • Giving an app a brand palette, or turning design tokens into a theme
  • CSS hot-reload during Docker development
  • Debugging styling crashes or design property issues

Do not hand-write a theme scaffold. mxcli theme apply writes a complete, verified one; mxcli theme create <name> --from <design-file> makes a theme the project owns and seeds its palette from --mxt-* declarations. See "A theme of your own" below. Hand-editing inside a generated block works exactly once — the digest fence refuses it on the next apply.

For MDL styling commands (show design properties, describe styling, alter styling, inline designproperties:, update widgets), see:

  • Existing proposal: docs/11-proposals/page-styling-support.md
  • Working examples: mdl-examples/doctype-tests/12-styling-examples.mdl (595 lines)
  • Implementation: mdl/executor/cmd_styling.go, mdl/executor/theme_reader.go

SCSS Compilation Chain

Directory Structure

MyProject/
├── theme/                          # project-level overrides
│   └── web/
│       ├── main.scss               # SCSS entry point (import chain)
│       ├── custom-variables.scss   # project variable overrides
│       ├── exclusion-variables.scss # Exclude unwanted Atlas components
│       └── settings.json           # Theme settings
│
├── themesource/                    # module-level theme definitions
│   ├── atlas_core/                 # base framework (always present)
│   │   └── web/
│   │       ├── design-properties.json  # widget design properties
│   │       ├── variables.scss          # Color/spacing/font variables
│   │       └── ...                     # Component SCSS files
│   ├── datawidgets/                # DataGrid2, gallery, etc.
│   ├── atlas_web_content/          # Web content styles
│   └── <module_name>/              # Each module can contribute styles
│       └── web/design-properties.json
│
└── theme-cache/web/                # Compiled CSS output (build artifact)

Read the full file on GitHub · 421 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.

  1. 7d ago First seen · 421 lines · 92 tokens per session scan A e8cf0219b943

Subscribe to this mod's changes

theme-styling is a skill published in the GitHub repository mendixlabs/mxcli (119 stars, last pushed yesterday), licensed Apache-2.0. It adds 92 tokens to every session and 5,132 once invoked, about $0.0005 per session on Opus 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 2026-09-03.

Related

Other skills, from other repositories

hatch3r-design-system-detect

Detects existing design tokens, component library, and theming convention in a project before authoring new UI primitives — output a concise inventory for downstream implementers.

hatch3r/hatch3r · 40 tokens

apple-design

Apple's approach to interface design and fluid, physical motion, translated for the web. Use when building or reviewing gesture-driven UI, spring animations, drag/swipe/sheet interactions, momentum and interruptible transitions, translucent materials and depth, typography (optical sizing, tracking, leading)…

termio-sh/termio · 80 tokens

animation-vocabulary

Reverse-lookup glossary that turns a vague description of a web animation or motion effect into its exact term ("the bouncy thing when a popover opens" → Pop in; "the iOS rubber-band scroll" → Rubber-banding). Use when the user asks "what's it called when…", or describes a motion effect without knowing its name and…

termio-sh/termio · 98 tokens

frontend-design

Create distinctive, production-grade frontend interfaces with high design quality. Use this skill when the user asks to build web components, pages, artifacts, posters, or applications (examples include websites, landing pages, dashboards, React components, HTML/CSS layouts, or when styling/beautifying any web UI).…

MerkyorLynn/Lynn · 77 tokens

popular-web-designs

54 real design systems (Stripe, Linear, Vercel) as HTML/CSS.

StarryCod/cogitum · 23 tokens

frontend-design

Guidance for distinctive, intentional visual design when building new UI or reshaping an existing one. Use whenever the task produces or modifies anything a user will see rendered — websites, landing pages, web apps, dashboards, React/HTML/Vue components, artifacts with visual output, style overhauls, or "make this…

XiaomiMiMo/MiMo-Code · 111 tokens