Quartz was originally designed as a tool to publish Obsidian vaults as websites. Even as the scope of Quartz has widened over time, it hasn’t lost the ability to seamlessly interoperate with Obsidian.
By default, Quartz ships with the ObsidianFlavoredMarkdown plugin, which is a transformer plugin that adds support for Obsidian Flavored Markdown. This includes support for features like wikilinks and Mermaid diagrams.
Finally, Quartz also provides CrawlLinks plugin, which allows you to customize Quartz’s link resolution behaviour to match Obsidian.