TheBrain-like graph-based navigation in Obsidian.md with Excalidraw and Breadcrumb - LATCH Hierarchy

A graph-style navigation system for Obsidian vaults is built to mimic the “brain” interface by using hierarchy as the organizing principle—then rendering that structure with Breadcrumbs inside an Excalidraw canvas. The setup centers on one open document as the “central thought,” places related notes into parent/child/sibling positions, and uses lateral “jump” links to move sideways through a knowledge graph. The practical payoff is faster navigation through large vaults: instead of searching or scrolling, users can visually trace how a note fits into a broader structure and then follow the graph outward.

The hierarchy logic is grounded in LATCH, a framework coined by Richard Saul Wurman that lists five ways to organize information: location, alphabet, time, category, and hierarchy. This workflow focuses specifically on hierarchy. In the example, a “storyboard” note sits at the center, with two parents: one representing a YouTube channel map and another representing a “hat rack” category. The note also has children (embedded objects/notes) and siblings (other related items on the same level). On the graph, children appear below, parents above, siblings to the right, and lateral moves (“jumps”) to the left—matching the “brain-like” navigation metaphor.

Breadcrumbs is the key plugin that turns Obsidian relationships into a structured breadcrumb list that the graph interface can render. The configuration matters: Breadcrumbs needs hierarchy settings that define upward relations (parents), downward relations (children), and lateral relations (jumps). The transcript also distinguishes between breadcrumb nodes and other link types: some nodes are “breadcrumbs,” while others are plain links referenced in the document, which can be toggled off if the graph becomes too busy. A critical operational step is initializing the Breadcrumbs index before using the interface—done by opening Breadcrumbs’ matrix view and clicking “refresh index.”

There are also real constraints. Breadcrumbs assumes unique file names; if two files share the same name in different folders, Breadcrumbs can’t reliably distinguish them. The workaround is renaming files to make names unique, with a stated plan to improve this by using the full file path as an identifier.

Technically, the graph is generated through an Excalidraw integration using the Excalidraw “script engine” store. Running the script overwrites the active drawing, so users must start it from the correct document. Once the generated graph appears, it can be turned off (“brain graph is off”), leaving behind a normal Excalidraw drawing made of links and editable shapes. That means the user can customize colors, fonts, and line styles—and then re-enable the graph later to regenerate the layout. Settings also include options like hiding attachments and inferring breadcrumb links. The overall message is that hierarchy-based navigation, implemented with Breadcrumbs and rendered in a brain-like Excalidraw graph, can make knowledge retrieval more visual and reusable—provided the Breadcrumbs configuration and file-naming rules are handled carefully.