Worked on the sveltejs/svelte repository to address a template syntax issue affecting the {@const} tag, focusing on improving template reliability and maintainability. The solution involved refining the ConstTag printer logic in the Svelte compiler, ensuring that the tag rendered without an invalid trailing semicolon. This adjustment required isolating ConstTag printing from the generic VariableDeclaration pathway and updating the associated test suite to reflect the corrected output. Leveraged skills in JavaScript, Svelte, and front end development, applying test-driven development practices and collaborating with contributors to deliver a targeted bug fix that enhances the stability of Svelte template rendering.