Msbuild Antipatterns
runceel/ReactiveProperty
Catalog of MSBuild anti-patterns with detection rules and fix recipes.
A skill your agent uses when integrating legacy code, custom code, or C/C++ code into Simulink via C Function blocks.
Install Simulink Use C Function Block
$ npx skills add matlab/simulink-agentic-toolkit --skill simulink-use-c-function-block -a claude-codeProject install by default; add -g for ~/.claude/skills/.
$ gh skill install matlab/simulink-agentic-toolkit simulink-use-c-function-block --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/simulink-modeling/simulink-use-c-function-block .claude/skills/simulink-use-c-function-block && 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 "simulink-use-c-function-block" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/simulink-modeling/simulink-use-c-function-block into .claude/skills/simulink-use-c-function-block/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simulink-use-c-function-block", 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/simulink-modeling/simulink-use-c-function-blockType 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 simulink-use-c-function-block -a codexProject install goes to .agents/skills/; add -g for ~/.codex/skills/.
$ gh skill install matlab/simulink-agentic-toolkit simulink-use-c-function-block --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/simulink-modeling/simulink-use-c-function-block .agents/skills/simulink-use-c-function-block && rm -rf skills-srcUse ~/.agents/skills/ instead of .agents/skills for a personal install.
Codex skills documentation · loads skills from .agents/skills/
Install the "simulink-use-c-function-block" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/simulink-modeling/simulink-use-c-function-block into .agents/skills/simulink-use-c-function-block/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simulink-use-c-function-block", 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 simulink-use-c-function-block -a cursorProject install goes to .agents/skills/; add -g for ~/.cursor/skills/.
$ gh skill install matlab/simulink-agentic-toolkit simulink-use-c-function-block --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/simulink-modeling/simulink-use-c-function-block .cursor/skills/simulink-use-c-function-block && 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 "simulink-use-c-function-block" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/simulink-modeling/simulink-use-c-function-block into .cursor/skills/simulink-use-c-function-block/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simulink-use-c-function-block", 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/simulink-modeling/simulink-use-c-function-block--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 simulink-use-c-function-block -a gemini-cliProject install goes to .agents/skills/; add -g for ~/.gemini/skills/.
$ gh skill install matlab/simulink-agentic-toolkit simulink-use-c-function-block --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/simulink-modeling/simulink-use-c-function-block .gemini/skills/simulink-use-c-function-block && 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 "simulink-use-c-function-block" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/simulink-modeling/simulink-use-c-function-block into .gemini/skills/simulink-use-c-function-block/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simulink-use-c-function-block", 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 simulink-use-c-function-blockInstalls 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 simulink-use-c-function-block -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/simulink-modeling/simulink-use-c-function-block .github/skills/simulink-use-c-function-block && 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 "simulink-use-c-function-block" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/simulink-modeling/simulink-use-c-function-block into .github/skills/simulink-use-c-function-block/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simulink-use-c-function-block", 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 simulink-use-c-function-block -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 simulink-use-c-function-block --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/simulink-modeling/simulink-use-c-function-block .opencode/skills/simulink-use-c-function-block && 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 "simulink-use-c-function-block" agent skill from https://github.com/matlab/simulink-agentic-toolkit/tree/main/skills-catalog/simulink-modeling/simulink-use-c-function-block into .opencode/skills/simulink-use-c-function-block/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "simulink-use-c-function-block", 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
simulink-use-c-function-block- GitHub stars
- 1.2k
- Token cost
- ~2.2k tokens
- SKILL.md length
- 843 words
- Files
- 4 (incl. references)
- Skills in repo
- 43
- Repo updated
- First seen
- Licence
- Custom licence
At a glance
A skill your agent uses when integrating legacy code, custom code, or C/C++ code into Simulink via C Function blocks.
- Works in 4 steps: Add the C Function block — use… → Configure custom code settings — point… → Set code sections — configure… → …
- Integrating legacy code
- SKILL.md covers When to Use, When NOT to Use, Rules and Workflow Overview, plus 5 more sections
- Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
What it does
Simulink Use C Function Block is an agent skill from matlab/simulink-agentic-toolkit. Use when integrating legacy code, custom code, or C/C++ code into Simulink via C Function blocks. Configure Simulink C Function blocks programmatically using the SymbolSpec API. TRIGGER when the user: - Asks about calling or wrapping C/C++ code or libraries in Simulink - Wants to create, configure, or use a C Function block - Mentions integrating custom code, legacy code, or external C/C++ into a model - Asks to integrate a C++ class into a Simulink model or test bench - Mentions inputs/outputs/parameters for a…
Its SKILL.md is about 2.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 4 other files, including reference files (for example `manifest.yaml`, `references/custom-code-config.md` and `references/examples.md`).
It sits in Development, covering Legacy modernization. It works with C++. 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
- Integrating legacy code
- C/C++ code into Simulink via C Function blocks
- The user: - Asks about calling
- Wrapping C/C++ code
Example prompts
- “/simulink-use-c-function-block”
Workflow steps
4 steps, taken from the first numbered list in SKILL.md.
- Add the C Function block — use model_edit with type "C Function" and set CustomCodeSettingLocation (default: "BlockSettings")
- Configure custom code settings — point to headers/sources either on the block or model config (see references/custom-code-config.md)
- Set code sections — configure OutputCode, StartCode, etc. on the block
- Configure symbols via SymbolSpec — use model_query_params to get the SymbolSpec, then evaluate_matlab_code for object operations
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 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
Simulink Use C Function Block loads about 2.2k tokens when it runs, and up to ~5.3k if it reads all its reference files. Until then it costs about 142 tokens; SKILL.md has 843 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 843 words (~2,233 tokens).
“The SymbolSpec object defines the block's inputs, outputs, persistent state, constants, and parameters.”
- name
- simulink-use-c-function-block
- license
- https://www.mathworks.com/content/dam/mathworks/license/pmrl/license.md
- metadata.author
- MathWorks
- metadata.version
- 1.0
Files
SKILL.md and 3 other files (references) in skills-catalog/simulink-modeling/simulink-use-c-function-block of matlab/simulink-agentic-toolkit.
- SKILL.md
- manifest.yaml
- references/custom-code-config.md
- references/examples.md
Open the folder on GitHubat commit c58e6ae
Compare with similar skills
Simulink Use C Function Block 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 |
|---|---|---|---|---|---|---|
| Simulink Use C Function Block this skillmatlab/simulink-agentic-toolkit | 1.2k | — | ~2.2k | Automated safety check: Pass | Custom licence | |
| Msbuild Antipatternsrunceel/ReactiveProperty | 944 | — | ~3.7k | Automated safety check: Pass | MIT | |
| Msbuild Modernizationmicrosoft/testfx | 1k | 3 repos | ~4.3k | Automated safety check: Pass | MIT | |
| Msbuild Antipatternsmicrosoft/testfx | 1k | — | ~4.5k | Automated safety check: Pass | MIT | |
| Modern C++ Idiomstrailofbits/skills | 7.4k | — | ~2.2k | Automated safety check: Pass | CC-BY-SA-4.0 | |
| Cpp Core GuidelinesSpecterOps/skills | 702 | — | ~500 | Automated safety check: Pass | Apache-2.0 |
Similar skills
- Official
Msbuild Modernization
microsoft/testfx
Guide for modernizing and migrating MSBuild project files to SDK-style format.
- Official
Msbuild Antipatterns
microsoft/testfx
Catalog of MSBuild anti-patterns with detection rules and fix recipes.
- Official
Modern C++ Idioms
trailofbits/skills
Steers C++ code toward C++20, C++23 and C++26 idioms such as smart pointers, concepts, std::expected and std::print, with a security focus.
Cpp Core Guidelines
SpecterOps/skills
Apply a condensed version of the ISO C++ Core Guidelines to C++ design, implementation, refactoring, modernization, and code review.
Modernization Flow
griddynamics/rosetta
Workflow for converting, modernizing, upgrading, or re-architecting code (e.g.
More from matlab/simulink-agentic-toolkit
All 43 skills in this repoResolve Design Errors
matlab/simulink-agentic-toolkit
A skill your agent uses when asked to run Design Error Detection (quick defect scan), find design errors in a Simulink model, perform root cause analysis on DED findings, fix division-by-zero…
Simscape Write Ssc
matlab/simulink-agentic-toolkit
A skill your agent uses when writing or editing Simscape Language (.ssc) source files — components, domains, or functions.
Simulink Optimizing Embedded Code
matlab/simulink-agentic-toolkit
Optimizes Simulink models for Embedded Coder generated code.
Checking Model Compliance
matlab/simulink-agentic-toolkit
A skill your agent uses when the user asks to check Simulink model compliance against a standard (MISRA, MAB, JMAAB, ISO, DO, IEC, EN, CERT C/CWE, AUTOSAR, Simulink Code Inspector (SLCI)), wants to…
Fix Sldv Incompatibility
matlab/simulink-agentic-toolkit
A skill your agent uses when a Simulink model is incompatible with Simulink Design Verifier (sldvcompat returns false, or an SLDV analysis errors out on an unsupported construct) and needs to be…
Simulink Collect Metrics
matlab/simulink-agentic-toolkit
Collect and assess quality metrics for Simulink models using the metric.Engine API.
Related
Works with
Categories
Questions about Simulink Use C Function Block
What does Simulink Use C Function Block do?
A skill your agent uses when integrating legacy code, custom code, or C/C++ code into Simulink via C Function blocks. Simulink Use C Function Block is an agent skill from matlab/simulink-agentic-toolkit. Use when integrating legacy code, custom code, or C/C++ code into Simulink via C Function blocks.
When should I use Simulink Use C Function Block?
Simulink Use C Function Block fits situations like: integrating legacy code; C/C++ code into Simulink via C Function blocks; the user: - Asks about calling; wrapping C/C++ code.
How do I install Simulink Use C Function Block in Claude Code?
Run `npx skills add matlab/simulink-agentic-toolkit --skill simulink-use-c-function-block -a claude-code`. Or copy the skill folder (skills-catalog/simulink-modeling/simulink-use-c-function-block in matlab/simulink-agentic-toolkit) into .claude/skills/simulink-use-c-function-block in your project. Claude Code loads it when a task matches its description.
How do I install Simulink Use C Function Block in Codex?
Run `npx skills add matlab/simulink-agentic-toolkit --skill simulink-use-c-function-block -a codex`. Or copy the skill folder (skills-catalog/simulink-modeling/simulink-use-c-function-block in matlab/simulink-agentic-toolkit) into .agents/skills/simulink-use-c-function-block in your project. Codex loads it when a task matches its description.
Can I use Simulink Use C Function Block 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 simulink-use-c-function-block -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/simulink-use-c-function-block, .gemini/skills/simulink-use-c-function-block, .github/skills/simulink-use-c-function-block and .opencode/skills/simulink-use-c-function-block in your project.
What does Simulink Use C Function Block need to run?
SKILL.md names no scripts, command-line tools or credentials: Simulink Use C Function Block is instructions for the agent only.
Does Simulink Use C Function Block 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 Simulink Use C Function Block 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 Simulink Use C Function Block use?
Simulink Use C Function Block 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 Simulink Use C Function Block use?
About 2.2k tokens (SKILL.md is roughly 8.9k 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 3.1k tokens, read only when the agent opens those files.
What are the alternatives to Simulink Use C Function Block?
Skills that share tags, products or a category with Simulink Use C Function Block: Msbuild Antipatterns (runceel/ReactiveProperty, 944 stars), Msbuild Modernization (microsoft/testfx, 1k stars), Msbuild Antipatterns (microsoft/testfx, 1k stars) and Modern C++ Idioms (trailofbits/skills, 7.4k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.
Who maintains Simulink Use C Function Block?
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.