Sidebar 13 block design & features
Sidebar13 is a file-tree sidebar built with Shadcn UI. The header is a brand lockup with logo tile, product name, and a short tagline. The body is a single Files group: a recursive tree of folders and files (src, components, ui, public, plus root files such as package.json). Folders show a chevron and an open or closed folder icon. Files show a document icon. The main header breadcrumbs a path like components / ui / button.tsx above a muted canvas.
Look at the rows and you get a compact, monochrome explorer. Folder icons stay muted. Chevrons rotate as branches open. The tree can use the full rail height. A scroll area covers deep nests. The surface is the default sidebar, not a dark editor theme.
This sits in an IDE or project-browser aesthetic, which is a fresh take next to the app-nav sidebars in the same set. Complexity is moderate and content-driven: the block only works if you feed it a real directory. The nesting itself is code-driven.
Nested folders indent as submenus. The breadcrumb grows with the selected path and hides earlier crumbs on narrow viewports.