Best for

Developers and researchers who remember what a file said but not its name, and want an agent to search the same index.

Why it deserves attention

Kensaku is an MIT-licensed Rust and Tauri app that indexes filenames in milliseconds and goes further than name matching: it reads PDF, DOCX, PPTX, XLSX, EPUB, ODT, and RTF files, covers 50-plus code and data formats, and runs OCR over screenshots with PP-OCRv6 by default. A custom unigram and bigram tokenizer handles Chinese, Japanese, and Korean text properly, and queries accept natural-language time ranges such as "last week" alongside a precise query language. It lives in the tray with a summon shortcut or runs as a normal window, offers Quick Look previews, and ships a CLI plus a loopback-only MCP server so Claude or Cursor can search the same local index. The trade-off is maturity: it is a 1.0.x project with roughly 800 stars, and releases are not code-signed, so macOS and Windows show a warning on first launch.

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