SilverBullet has a generic indexing infrastructure for Objects. Pages are automatically index upon save, so about every second.

The Index plug also defines syntax for Tags.

Content indexing

The Index plug indexes the following:

• Metadata
• Tags
• Page backlinks (queryable via the link query source), this information is used when renaming a page (automatically updating pages that link to it).
• List items, such as bulleted and numbered lists (queryable via the item query source)
• Paragraphs

Commands

• Space: Reindex: Reindexes the entire space
• Page: Rename: Rename a page
    #ProTip Renaming is more conveniently done by editing the page name in the header and hitting Enter.
• Page: Batch Rename Prefix: Rename a page prefix across the entire space
• Page: Extract: Extract the selected text into its own page