Download and install the latest version of Filestar.
Right click on one or more Cals file(s) on your desktop and select Convert with Filestar.
Type convert to rgf in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i photo.cals -c "convert to rgf" (how).
Documents - File Explorer─☐✕
This PC › Documents
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Desktop
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Pictures
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.calsContract.cals
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert CALS to RGF
Claude Code, Codex, Cursor and other agents can do this on your computer with Filestar. Your files stay on your machine.
Install Filestar and add it to your agents:
npm install -g filestar
filestarcli agent install
Then ask your agent:
“Convert the CALS files in my Downloads folder to RGF”
Or run it yourself:
filestarcli -i photo.cals -c "convert to rgf"
Runs on your computer, so your files stay on it. Works on Windows, macOS and Linux. 50 free conversions with the npm install, no account needed.
Can my AI agent convert CALS to RGF?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i photo.cals -c "convert to rgf" on your computer, so your files stay on it.
The CALS Raster Graphic File, having the extension .cals, is a type of image file format primarily used for the storage and exchange of digital images, especially in the context of technical and engineering documents. Developed in the mid-1980s by the United States Department of Defense, the CALS format was part of an initiative to standardize electronic document management and interchange, particularly for military and government applications.
The LEGO Mindstorms EV3 Robot Graphics File (RGF) is a proprietary binary file format used by the LEGO Mindstorms EV3 software to store robot graphic models. It is a vector-based file format that stores information such as the robot's 3D geometry, color and other visual properties, as well as the model's connection points, used for connecting with other LEGO elements.
