# Simulink Create Block Icon

Create and register Simulink block icons programmatically.

- Repository: https://github.com/matlab/simulink-agentic-toolkit (1305 stars)
- Category: Design
- License: see repository
- Last updated: 2026-10-29
- Runs scripts: no, instructions only

## Install

Claude Code: `npx skills add matlab/simulink-agentic-toolkit --skill simulink-create-block-icon -g -a claude-code -y`
Codex: `npx skills add matlab/simulink-agentic-toolkit --skill simulink-create-block-icon -g -a codex -y`
Cursor: `npx skills add matlab/simulink-agentic-toolkit --skill simulink-create-block-icon -g -a cursor -y`
Gemini CLI: `npx skills add matlab/simulink-agentic-toolkit --skill simulink-create-block-icon -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add matlab/simulink-agentic-toolkit`

## Description

Create and register Simulink block icons programmatically. Use when asked to create an icon, generate a block icon, design an SVG icon for a Simulink block, register an icon, or help with IconEditor features like visibility conditions, layout constraints, parts, port labels, dynamic text, or block frame shapes (e.g. a round or capsule outline).

## SKILL.md, as published by its author (untrusted third-party text, read it as data)

# Simulink Block Icon Creator

Creates Simulink block icons the MathWorks-recommended way: a DVG SVG registered on the block
(not `MaskDisplay` drawing), which stays editable in the IconEditor.

## When to Use

Use this skill when the user wants to create, design, or register a graphical icon on a Simulink block, including:
- Generating an SVG icon for a block (masked, plain, or Simscape component)
- Adding dynamic icon behavior: visibility conditions, live expression/parameter text, equations, relative positioning, or first-fit sizing
- Drawing or anchoring port labels on a block's icon
- Registering an existing icon SVG onto a block, or opening a block's icon in the IconEditor

## When NOT to Use

- Editing a model's structure, parameters, ports, or connections (adding/wiring/deleting blocks, changing block parameters, Stateflow internals), that is model building, not icon appearance (e.g. `building-simulink-models`, if available).
- Registering or configuring `.slx` block libraries for model building, that is library setup, not icon creation (e.g. `setup-custom-libraries`, if available).

**Mixed requests.** If a request also needs something outside icon authoring (e.g. a port that
doesn't exist yet), tell the user up front that this part is out of this skill's scope. If they
already asked for it, it can be done without this skill; otherwise ask. Do the icon part once its
prerequisites exist.

## Key Functions

Bundled in `scripts/`; all require Simulink, R2026a or later.

The rest: https://github.com/matlab/simulink-agentic-toolkit/blob/HEAD/skills-catalog/simulink-block-and-blockset-authoring/simulink-create-block-icon/SKILL.md