# Simulink Check Rapid Accelerator Compatibility

Statically analyze a Simulink model for Rapid Accelerator (raccel) mode incompatibilities.

- Repository: https://github.com/matlab/simulink-agentic-toolkit (1305 stars)
- Category: Engineering
- 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-check-rapid-accelerator-compatibility -g -a claude-code -y`
Codex: `npx skills add matlab/simulink-agentic-toolkit --skill simulink-check-rapid-accelerator-compatibility -g -a codex -y`
Cursor: `npx skills add matlab/simulink-agentic-toolkit --skill simulink-check-rapid-accelerator-compatibility -g -a cursor -y`
Gemini CLI: `npx skills add matlab/simulink-agentic-toolkit --skill simulink-check-rapid-accelerator-compatibility -g -a gemini-cli -y`
Claude Code plugin marketplace: `/plugin marketplace add matlab/simulink-agentic-toolkit`

## Description

Statically analyze a Simulink model for Rapid Accelerator (raccel) mode incompatibilities. Identifies unsupported blocks (Interpreted MATLAB Function, Level-2 S-Functions without TLC), configuration issues, and data type restrictions that prevent code generation. Classifies each issue as BLOCKER (build error) or WARNING (build warning). Use BEFORE calling sim() in rapid-accelerator mode, when buildRapidAcceleratorTarget fails, or when the user asks "why won't my model run in raccel?" TRIGGER: any request explicitly involving rapid accelerator mode, raccel, raccel build errors, or buildRapidAcceleratorTarget failures.

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

# Checking Rapid Accelerator Compatibility

Statically analyze a Simulink model for all raccel incompatibilities in one pass, without iterative build-fail-fix cycles.

## When to Use

- User wants to simulate a model in Rapid Accelerator mode
- `buildRapidAcceleratorTarget` fails with errors
- User asks "why won't my model run in raccel?"

## When NOT to Use

- Model is only intended for Normal or Accelerator mode, use `simulating-simulink-models` instead
- User is debugging a runtime error (model builds fine but crashes), **exception**: if the model crashes in raccel, run this check anyway; the root cause may be a static incompatibility that manifests as a runtime crash
- Issue is purely a compiler/toolchain problem (not model content)
- General code generation for GRT/ERT targets (not raccel-specific)
- Model Advisor checks (separate workflow)
- SIL/PIL/HIL or Simulink Real-Time deployment

All script functions are in the skill's `scripts/` directory. Use `evaluate_matlab_code` with `project_path` set to the skill's `scripts/` folder so MATLAB can find them. Never use `addpath`.

## Diagnostic Workflow

Detect **all** incompatibilities statically, by parsing model structure, block parameters, data types, and configuration, **without calling `buildRapidAcceleratorTarget`**. This finds all issues in one pass.

> **Two-phase workflow:** Phase 1 (Steps 1, 3a) produces the compatibility report, your response MUST END there. Phase 2 (Steps 3b, 3c) applies fixes one at a time, each requiring a separate user confirmation. Never combine both phases in one response.

### Step 1: Static Inspection (primarily MCP tools)

Gather model information using MCP tools in parallel:

**1a. Read block topology** via `model_read`:

```
model_read(model: "ModelName", scope: "root", depth: "inf")
```

From the output, immediately flag blocks with these `BlockType` values:

The rest: https://github.com/matlab/simulink-agentic-toolkit/blob/HEAD/skills-catalog/simulink-simulation/simulink-check-rapid-accelerator-compatibility/SKILL.md