Show HN: Lacuna – open-source inline AI writing suggestions for your Mac

Category: cli-tool

Tags: macos, ai, writing-assistant, menu-bar, accessibility

Score: 5.8/10 (Innovation: 5, Technical: 5, Documentation: 8, Utility: 5)

Lacuna is a macOS menu bar app that lets users type brace-delimited instructions in any text field and press a shortcut to get three inline AI-generated suggestions from OpenAI or Anthropic. It is a keyboard-driven, privacy-conscious utility inspired by Rectangle, offering a novel way to invoke LLMs directly within native macOS text inputs.

Target audience: macOS users, writers, developers, and anyone who wants AI-assisted text completion while typing

Repository: https://jackdamon.org/blog/lacuna/ · Swift · MIT

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