Kuku is an open-source macOS app for local Markdown notes. It keeps your vault as ordinary .md files while adding search, backlinks, graph navigation, Second Brain workflows, and AI assistance. The assistant can read, search, and propose changes, but edits go through reviewable diffs before they touch your files. Kuku is a strong open-source alternative to Obsidian for people who want plain Markdown ownership, local-first workflows, reviewable AI edits, and optional encrypted sync.
