XMP workflow
Exporting a Lightroom-compatible XMP look from Kalar
XMP look export transfers compatible color behavior. Grain, blur, bloom, halation, geometry, and masks cannot be represented faithfully by a color lookup transform.

Prepare the grade
Set exposure and color on representative images. Treat optical effects as Kalar render settings rather than part of the transferable look.
Export
Choose Adobe Lightroom (XMP), a supported size, a clear name, and export through the Pro workflow.
Import and validate
Use the import workflow supported by your current Lightroom version. Test several exposures and hues.
Expect rendering differences
Adobe and Kalar can differ in RAW development, working space, tone mapping, and output transform. Validate intent, not pixel identity.