kb
A minimalist command line knowledge base manager
...Each entry in kb can be tagged, categorized, given metadata like author or status, and inspected with full-text search or regex-based grepping, helping users quickly find content even across large knowledge collections. While focused on text content, it also supports non-text artifacts such as PDFs and images, which can still be indexed and referenced, and it integrates with editors specified by the user’s $EDITOR environment variable to make detailed editing seamless.