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Generate Code with MATLAB Coder | DecimalAI

codingby matlab

Generate Code with MATLAB Coder

matlab/matlab-generate-code

Source matlab/matlab-agentic-toolkit ↗License NOASSERTION

Generate, verify, refine, and accelerate C/C++ or CUDA code from MATLAB with MATLAB Coder, Embedded Coder, GPU Coder, or MATLAB Test. Also covers writing codegen-ready MATLAB code: language constraints, coder.* directives, and optimization patterns.

SkillScore88Maintained

Automatic

Coding pack

Last verified 8/17/2026

What it changes

Passed 22 of 25 test cases with the skill, and 11 of 25 without it.

Without skill44%

With skill88%

Checks it passed that the model alone missed

Recommends coder.noImplicitExpansionInFunction.
Recommends coder.nullcopy when allocating the buffer.
Sets cfg.EnableMemcpy = false on the configuration object.

and 12 more in the full report

11 fixed11 passed either way3 still failing0 broke

Pass-rate lift: +44 pp
Tokens: +158%
Agent turns: 0%
Response time: -42%

Model gemini-3.6-flashMeasured 8/17/2026v222 of 25 cases passed with skill

Tokens, turns and time describe resource use, not a dollar price.

Use this skill

Save it into your project's skills folder. Claude Code picks it up in its next session.

curl -fsSL --create-dirs -o .claude/skills/matlab-matlab-generate-code/SKILL.md https://app.decimal.ai/s/matlab-matlab-generate-code/SKILL.md

Want it pinned and updatable? pip install "decimalai>=0.15", then decimalai skills add matlab-matlab-generate-code, and start Claude Code with claude --plugin-dir "$(git rev-parse --show-toplevel)/.agents"

1 · One-time — install the CLI (docs ↗)

pip install "decimalai>=0.15"

2 · Get the skill — writes .agents/skills/matlab-matlab-generate-code/ and pins it in .decimal/skills.lock

decimalai skills add matlab-matlab-generate-code

No CLI? Get the same file — curl · raw file

curl -fsSL --create-dirs -o .claude/skills/matlab-matlab-generate-code/SKILL.md https://app.decimal.ai/s/matlab-matlab-generate-code/SKILL.md

Raw file: /s/matlab-matlab-generate-code/SKILL.md ↗ · machine-readable summary at /s/matlab-matlab-generate-code.json ↗

Safety checks: 3 of 3 passed

Code scan CleanIntent PassedContent Clean

See it in action

One of 11 test cases the skill fixed. Same model, same prompt, with and without the skill.

1 of 11

Prompt

I want to stop MATLAB Coder from generating `memcpy` calls in C code. Setting `cfg.MemcpyThreshold = 0` did not work. What property turns off `memcpy`?

What was checked, without and with the skill
Checked	Without skill	With skill
Sets cfg.EnableMemcpy = false on the configuration object.	Missed	Passed

case-13 · gemini-3.6-flash · 8/17/2026 · answers are capped and redacted

What's inside

The instructions your model reads when the skill loads.

SKILL.md198 lines14 files

Generate Code with MATLAB Coder

Umbrella skill for the MATLAB Coder workflow: generate code, verify it, refine the config, and accelerate with profiled MEX.

When to Use

Generating C/C++ or CUDA code from MATLAB functions (MEX, lib, dll, exe)
Writing new MATLAB code that must be compatible with code generation
Reviewing existing MATLAB code for codegen readiness or fixing codegen errors
Configuring codegen settings for specific targets (embedded, speed, readability, safety)
Verifying generated code matches MATLAB output (coder.runTest, matlabtest.coder.TestCase)
Profiling and accelerating generated MEX functions
Using coder.* directives (coder.varsize, coder.const, coder.extrinsic, coder.ceval, etc.)

When NOT to Use

Simulink Coder / Embedded Coder Simulink-model workflows
Generating code for target languages that are not C, C++, or CUDA
Fixed-Point Designer conversion workflows
Hand-written MEX C files (not generated by MATLAB Coder)
General MATLAB programming unrelated to code generation

Route to a more specific skill

Generating code from an AI model (PyTorch .pt2 / LiteRT .tflite via loadPyTorchExportedProgram / loadLiteRTModel) → use matlab-deploy-ai-model. Return here for the underlying coder.* directives, config tuning, and screener/verification.
Deploying to physical embedded hardware (on-target PIL, ERT hardware configs, board selection — STM32 / Raspberry Pi / ARM Cortex) → use matlab-deploy-embedded-code. This skill covers host-side codegen, SIL, and config tuning up to hardware targeting.
Speeding up interpreted MATLAB by rewriting the M-code (vectorization, preallocation, caching) → use matlab-optimize-performance. This skill's acceleration path assumes you want to compile to MEX/C, not restructure the algorithm.
General MATLAB test authoring (parameterized tests, fixtures, mocking, coverage, CI/CD, App Designer) → use matlab-write-test. This skill covers only codegen-equivalence tests (coder.runTest, matlabtest.coder.TestCase).
Modernizing deprecated APIs for currency/maintainability when code generation is not the goal → use matlab-modernize-code. This skill rewrites source only to satisfy codegen constraints, with explicit authorization.

Routing — load the matching reference file on demand

Pick the workflow that matches the user's intent and read the corresponding references/*.md. Each reference file is a deep, self-contained guide; load only what you need rather than carrying all four in context.

User intent	Load
Writing new codegen-compatible MATLAB; reviewing MATLAB for codegen readiness; fixing codegen errors; `%#codegen`; language constraints; type/size rules	`references/write-codegen-ready.md`
Understanding a specific `coder.*` directive (coder.varsize, coder.const, coder.inline, coder.unroll, coder.extrinsic, etc.)	`references/write-coder-directives.md`
Using MATLAB classes in codegen; class limitations; `coder.classSignature`; handle vs value class restrictions	`references/write-class-limitations.md`
Generate C/C++/CUDA code (MEX, lib, dll, exe), specify input types, fix `coder.screener` issues	`references/generate-code.md`

Track record

Benchmark

22 / 25

test cases passed, vs 11 / 25 without

Adoption

Users: 0
Times used: 0

Safety and source details

SkillSafety

✓ 3 of 3 passed

Code scan15 of 15 checks clean

0 critical · 0 warning · 0 info — scanner v5 — 8/17/2026

View 15 scanner checks

live_secretremote_code_executionreverse_shelldata_exfiltrationssrf_metadataagent_snoopinganti_refusaldestructive_commandsobfuscated_unicodeunicode_homoglyphopaque_blobsuspicious_urltool_overreachtrigger_abuseprompt_injection_phrasing

IntentSafe

LLM judge · does the skill do what it claims

ContentClean

LLM judge · policy & harmful-content review

Source

Imported

matlab / matlab-agentic-toolkit

skills-catalog/code-generation/matlab-generate-code/SKILL.md

View on GitHub ↗

License https://www.mathworks.com/content/dam/mathworks/license/pmrl/license.mdImported 8/17/2026Version v2Bundled 13 files

Other skills for the same job

Published skills whose descriptions closely match this one, with their headline benchmark lift.

matlab/matlab-deploy-ai-modelGenerate C/C++ or CUDA code from an AI model (PyTorch, LiteRT) using MATLAB Coder or GPU Coder. Use when the user wants to integrate an AI model into an application with code generation as the end goal — generating MEX, CUDA MEX, static library, dynamic library, or executable — or using the model in Simulink for simulation and code generation. This skill currently documents the PyTorch ExportedProgram (.pt2) workflow via loadPyTorchExportedProgram; LiteRT is already supported by the product (loaClose match+45 pp pass-rate lift

More skills from the same source and nearby in the registry, with their headline benchmark lift.

Ready to supercharge your AI agents?

See it in action

What's inside

Generate Code with MATLAB Coder

When to Use

When NOT to Use

Route to a more specific skill

Routing — load the matching reference file on demand

Track record

Benchmark

Adoption

SkillSafety

Source

Other skills for the same job

Related skills