Web Application Testing
anthropics/skills
Tests local web applications with Python Playwright scripts, checking frontend behavior, capturing screenshots and reading browser console logs.
Builds and edits Simulink, System Composer, Stateflow, and Simscape models.
Install Building Simulink Models
$ npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install matlab/simulink-agentic-toolkit building-simulink-models --agent claude-codeProject scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills-catalog/model-based-design-core/building-simulink-models .claude/skills/building-simulink-models && rm -rf skills-srcUse ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.
Claude Code skills documentation · loads skills from .claude/skills/
Install the "building-simulink-models" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/model-based-design-core/building-simulink-models into .claude/skills/building-simulink-models/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-simulink-models", then confirm the skill loads.Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$skill-installer install https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/model-based-design-core/building-simulink-modelsType this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.
$ npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install matlab/simulink-agentic-toolkit building-simulink-models --agent codexProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills-catalog/model-based-design-core/building-simulink-models .agents/skills/building-simulink-models && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "building-simulink-models" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/model-based-design-core/building-simulink-models into .agents/skills/building-simulink-models/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-simulink-models", then confirm the skill loads.Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install matlab/simulink-agentic-toolkit building-simulink-models --agent cursorProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills-catalog/model-based-design-core/building-simulink-models .cursor/skills/building-simulink-models && rm -rf skills-srcUse ~/.cursor/skills/ instead of .cursor/skills for a personal install.
Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/
Install the "building-simulink-models" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/model-based-design-core/building-simulink-models into .cursor/skills/building-simulink-models/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-simulink-models", then confirm the skill loads.Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gemini skills install https://github.com/matlab/simulink-agentic-toolkit.git --path skills-catalog/model-based-design-core/building-simulink-models--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.
$ npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install matlab/simulink-agentic-toolkit building-simulink-models --agent gemini-cliProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills-catalog/model-based-design-core/building-simulink-models .gemini/skills/building-simulink-models && rm -rf skills-srcUse ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.
Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/
Install the "building-simulink-models" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/model-based-design-core/building-simulink-models into .gemini/skills/building-simulink-models/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-simulink-models", then confirm the skill loads.Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ gh skill install matlab/simulink-agentic-toolkit building-simulink-modelsInstalls for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).
$ npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a github-copilotProject install goes to .agents/skills/; add -g for ~/.copilot/skills/.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills-catalog/model-based-design-core/building-simulink-models .github/skills/building-simulink-models && rm -rf skills-srcUse ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.
GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/
Install the "building-simulink-models" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/model-based-design-core/building-simulink-models into .github/skills/building-simulink-models/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-simulink-models", then confirm the skill loads.GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
$ npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a opencodeOpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.
$ gh skill install matlab/simulink-agentic-toolkit building-simulink-models --agent opencodeProject scope by default (.agents/skills/); add --scope user for a personal install.
$ git clone --depth 1 https://github.com/matlab/simulink-agentic-toolkit.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills-catalog/model-based-design-core/building-simulink-models .opencode/skills/building-simulink-models && rm -rf skills-srcUse ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.
OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/
Install the "building-simulink-models" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/model-based-design-core/building-simulink-models into .opencode/skills/building-simulink-models/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "building-simulink-models", then confirm the skill loads.OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.
Facts
- Skill name
building-simulink-models- GitHub stars
- 1.2k
- Token cost
- ~2.3k tokens
- SKILL.md length
- 1,031 words
- Files
- 5 (incl. references)
- Skills in repo
- 43
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
Builds and edits Simulink, System Composer, Stateflow, and Simscape models.
- Works in 7 steps: Ensure Library & Policy Prerequisites:… → Library block lookup: List every block… → Read first: Use model_read on the target… → …
- Modifying model structure
- SKILL.md covers When to Use, When NOT to Use, Library & Policy Prerequisites… and Workflow, plus 6 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Building Simulink Models is an agent skill from matlab/simulink-agentic-toolkit. Builds and edits Simulink, System Composer, Stateflow, and Simscape models. Use when modifying model structure, parameters, ports, connections, or Stateflow chart internals.
Its SKILL.md is about 2.3k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `manifest.yaml`, `references/simscape.md` and `references/stateflow.md`).
It sits in Testing & QA. The repository describes itself as: The Simulink Agentic Toolkit gives your AI agent both the tools and the expertise to work effectively with Simulink and Model-Based Design.
When your agent uses it
- Modifying model structure
- Stateflow chart internals
Example prompts
- “Use the building-simulink-models skill to build and edits Simulink, System Composer, Stateflow, and Simscape models”
- “/building-simulink-models”
Workflow steps
7 steps, taken from the first numbered list in SKILL.md.
- Ensure Library & Policy Prerequisites: See BLOCKING GATE above. Do not proceed until gates pass.
- Library block lookup: List every block type you plan to use, search .satk/library-kg/index.md and the relevant category pages to find each…
- Read first: Use model_read on the target scope to get block IDs and understand existing topology.
- Plan the data flow: For complex edits, sketch inputs → operations → outputs, then map to blocks identified in Step 1 & 2.
- Edit: Use model_edit with operations scoped to one subsystem level at a time.
- Verify: Use model_read on the scope to confirm the structure matches your intent.
- Check connectivity: After all edits in a scope are complete, run model_check to catch unconnected ports or dangling lines. Fix any…
What it can do on your machine
Read from SKILL.md and the folder at commit c58e6ae. It shows what the files ask for, not the result of running them.
Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
No scripts in the folder and no shell commands in SKILL.md (its code samples are json and matlab).
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Context cost
Building Simulink Models loads about 2.3k tokens when it runs, and up to ~6.4k if it reads all its reference files. Until then it costs about 50 tokens; SKILL.md has 1,031 words of instructions outside code blocks.
Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.
Safety
Auto-check passed
The automated check found no risky patterns in SKILL.md.
Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.
SKILL.md
Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 1,031 words (~2,335 tokens).
“Use model_edit for all structural changes — Simulink, System Composer, Simscape, and Stateflow chart internals”
- name
- building-simulink-models
- license
- https://www.mathworks.com/content/dam/mathworks/license/pmrl/license.md
- metadata.author
- MathWorks
- metadata.version
- 1.5
Files
SKILL.md and 4 other files (references) in skills-catalog/model-based-design-core/building-simulink-models of matlab/simulink-agentic-toolkit.
- SKILL.md
- manifest.yaml
- references/simscape.md
- references/stateflow.md
- references/system-composer.md
Open the folder on GitHubat commit c58e6ae
Compare with similar skills
Building Simulink Models next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.
| Skill | Stars | Used in | Tokens | Auto-check | Licence | Repo updated |
|---|---|---|---|---|---|---|
| Building Simulink Models this skillmatlab/simulink-agentic-toolkit | 1.2k | — | ~2.3k | Automated safety check: Pass | Custom licence | |
| Web Application Testinganthropics/skills | 180k | 51 repos | ~966 | Automated safety check: Pass | Apache-2.0 | |
| Diagnosing Bugsfossasia/eventyay-interpretation | 1.6k | 32 repos | ~2.1k | Automated safety check: Pass | Apache-2.0 | |
| TDDpietheinstrengholt/rssmonster | 564 | 30 repos | ~906 | Automated safety check: Pass | MIT | |
| TDD WorkflowhellangleZ/burn-in-cceverywhere-ralph | 112 | 11 repos | ~2.4k | Automated safety check: Pass | None | |
| TDDsanity-io/sanity | 6.4k | 20 repos | ~1k | Automated safety check: Pass | MIT |
Similar skills
- Official
Diagnosing Bugs
fossasia/eventyay-interpretation
Diagnosis loop for hard bugs and performance regressions. An agent skill from fossasia/eventyay-interpretation.
TDD
pietheinstrengholt/rssmonster
Test-driven development. An agent skill from pietheinstrengholt/rssmonster.
TDD Workflow
hellangleZ/burn-in-cceverywhere-ralph
A skill your agent uses when writing new features, fixing bugs, or refactoring code.
- Official
TDD
sanity-io/sanity
Test-driven development with red-green-refactor loop. An agent skill from sanity-io/sanity.
Context Driven Development
Ibrahim-3d/orchestrator-supaconductor
A skill your agent uses when working with Conductor's context-driven development methodology, managing project context artifacts, or understanding the relationship between product.md, tech-stack.md…
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Related
Categories
Questions about Building Simulink Models
What does Building Simulink Models do?
Builds and edits Simulink, System Composer, Stateflow, and Simscape models. Building Simulink Models is an agent skill from matlab/simulink-agentic-toolkit. Builds and edits Simulink, System Composer, Stateflow, and Simscape models.
When should I use Building Simulink Models?
Building Simulink Models fits situations like: modifying model structure; stateflow chart internals.
How do I install Building Simulink Models in Claude Code?
Run `npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a claude-code`. Or copy the skill folder (skills-catalog/model-based-design-core/building-simulink-models in matlab/simulink-agentic-toolkit) into .claude/skills/building-simulink-models in your project. Claude Code loads it when a task matches its description.
How do I install Building Simulink Models in Codex?
Run `npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a codex`. Or copy the skill folder (skills-catalog/model-based-design-core/building-simulink-models in matlab/simulink-agentic-toolkit) into .agents/skills/building-simulink-models in your project. Codex loads it when a task matches its description.
Can I use Building Simulink Models in Cursor, Gemini CLI or GitHub Copilot?
Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add matlab/simulink-agentic-toolkit --skill building-simulink-models -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/building-simulink-models, .gemini/skills/building-simulink-models, .github/skills/building-simulink-models and .opencode/skills/building-simulink-models in your project.
What does Building Simulink Models need to run?
SKILL.md names no scripts, command-line tools or credentials: Building Simulink Models is instructions for the agent only.
Does Building Simulink Models access the network?
SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.
Is Building Simulink Models safe to install?
Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.
What licence does Building Simulink Models use?
Building Simulink Models has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.
How many tokens does Building Simulink Models use?
About 2.3k tokens (SKILL.md is roughly 9.3k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 4.1k tokens, read only when the agent opens those files.
What are the alternatives to Building Simulink Models?
Skills that share tags, products or a category with Building Simulink Models: Web Application Testing (anthropics/skills, 180k stars), Diagnosing Bugs (fossasia/eventyay-interpretation, 1.6k stars), TDD (pietheinstrengholt/rssmonster, 564 stars) and TDD Workflow (hellangleZ/burn-in-cceverywhere-ralph, 112 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Building Simulink Models?
matlab (a GitHub organization) maintains it in matlab/simulink-agentic-toolkit, which has 1,199 GitHub stars. The repository holds 43 skills in this directory. The repository was last updated on October 7, 2026.
Source: matlab/simulink-agentic-toolkit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.