Simulink Interactions

Simulink Open Model Context Resolution

Resolve what the user is referring to in an already-open Simulink session, then route to the right skill.

When to Use

• User says "this model", "this block", "this subsystem", "selected blocks"
• User asks to find or locate blocks in the currently open model
• User refers to a model without specifying a file path to open

When NOT to Use

• Adding, connecting, deleting, or configuring blocks → use building-simulink-models
• Running simulations, parameter sweeps, accessing logsout → use simulating-simulink-models
• Writing pass/fail behavioral tests → use testing-simulink-models
• Organizing variables and data dictionaries → use simulink-data-management

Step 1: Resolve the Target

Use mcp__simulink__evaluate_matlab_code to resolve references:

| User says | MATLAB expression | |---|---| | "this model" | bdroot(gcs) | | "this system" / "this subsystem" | gcs | | "this block" | gcb | | "selected blocks" (plural) | see snippet below | | "all [Type] blocks in this subsystem" | see snippet below | | "all [Type] blocks in the model" | see snippet below |

Always verify the result is non-empty. If gcb or gcs returns an empty string, tell the user no block or subsystem is currently selected and ask them to select one or provide a path.

Selected blocks (plural)

opts = Simulink.FindOptions;
opts.SearchDepth = 1;
blks = getfullname(Simulink.findBlocks(gcs, 'Selected', 'on', opts));
if isempty(blks)
    disp('No blocks are currently selected.');
else
    disp(blks)
end

All blocks of a specific type in the current subsystem

opts = Simulink.FindOptions;
opts.SearchDepth = 1;
BlockType = 'Gain'; % replace with actual type
blks = getfullname(Simulink.findBlocksOfType(gcs, BlockType, opts));

All blocks of a specific type in the entire model

BlockType = 'Gain'; % replace with actual type
blks = getfullname(Simulink.findBlocksOfType(bdroot, BlockType));

Step 2: Hand Off

Once you have the resolved block path(s) or model name, use it as input to the appropriate skill:

| User intent | Hand off to | |---|---| | Inspect model structure or topology | model_read / model_overview | | Query parameter values | model_query_params | | Resolve variable-backed values | model_resolve_params | | Edit structure or parameters | building-simulink-models (via model_edit) | | Run simulation or access results | simulating-simulink-models | | Write or run pass/fail tests | testing-simulink-models | | Organize variables or dictionaries | simulink-data-management |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: simulink
• Source: simulink/skills
• License: BSD-3-Clause

Install and usage instructions live in the source repository linked above.