Worked on the tldraw/tldraw repository to address a bug in SVG export, focusing on preserving marker references when using fragment URLs such as '#arrow'. The solution involved refining the URL parsing logic to correctly distinguish fragment-only CSS URLs, ensuring that marker endpoints were not misinterpreted as external resources and thus retained during export. This update improved the reliability of SVG and PNG export pipelines, particularly for graphics relying on marker integrity. The work was implemented using TypeScript and involved front end development as well as unit testing, with new tests added to validate the updated fragment URL handling and export behavior.