Download and install the latest version of Filestar.
Right click on one or more Costyle file(s) on your desktop and select Convert with Filestar.
Type convert to spi1d in the search box.
Press Convert.
Or let an AI agent do it: filestarcli -i file.costyle -c "convert to spi1d" (how).
Documents - File Explorer─☐✕
This PC › Documents
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.costyleContract.costyle
.xlsxBudget.xlsx
.pdfReport.pdf
.pngLogo.png
Filestar*Help✕
Drop files here to get started
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Let your AI agent convert COSTYLE to SPI1D
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 COSTYLE files in my Downloads folder to SPI1D”
Or run it yourself:
filestarcli -i file.costyle -c "convert to spi1d"
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 COSTYLE to SPI1D?
Yes. Install the Filestar CLI with npm install -g filestar and your agent can run filestarcli -i file.costyle -c "convert to spi1d" on your computer, so your files stay on it.
A Capture One style is an image-adjustment preset for Phase One's Capture One raw converter. It stores the settings of Capture One's tools - exposure, tone, colour balance, curves and the colour editor - as plain XML.
An SPI1D file is a one-dimensional colour lookup table in the text format of Sony Pictures Imageworks, used by OpenColorIO. It maps each channel through a curve, for example a log-to-linear transfer function.