event-catalog/eventcatalog @eventcatalog/core@4.10.0 on GitHub

af02bfc: feat(core): customize any resource's sidebar with a sidebar.json file
Drop a sidebar.json next to any resource's index.mdx (domains, systems, services, agents, messages, flows, containers, entities, data products and ADRs) to fully define that resource's sidebar. Compose predefined $sections (kept live as your catalog changes) with your own groups of resource references ([[service|order-service]]), documentation ([[doc|guides/onboarding]]), specifications ([[spec|openapi.yml]]), schemas ([[schema|order-placed]]) and links (with {id}/{version}/{collection} placeholders). Groups nest, accept an explicit collapsed initial state, and versioned resources inherit the resource folder's sidebar. Unresolvable tokens and doc/spec/schema references fail the build with an error naming the file and the valid options.
The sidebar also renders as a consistent docs-style tree: every group is collapsible with carets on the right, nested groups indent under a guide line, item counts are removed, the selected item stays in view after navigation, and scroll position is remembered.