Lertaro: open-source file search & productivity launcher for Windows (.NET 10/WPF). FZF-style fuzzy search with operators + pinyin alias matching. Plugin SDK extends search sources, aliases, actions, columns, previews & themes. Indexes via NTFS USN Journal & MFT—millisecond responses over millions of files. Three modes: quick popup, full window, inline bar in Explorer. SYSTEM-level indexing isolated from UI. x64/ARM64 + portable.
