1667, a terminal UI for writing fiction with language models
Hi HN. I built 1667 for my own fiction work and now use it each day. This probably has a limited audience. Maybe an audience of one... Why a terminal interface for story writing? I'm a dev. I like to use terminals for a lot of stuff. Most WebUIs feel off to me. That's the only reason. One thing that bothers me about writing in existing tools is that they don't fit the way I write. The mental model of my story is a tree. I try many takes usually continue with just one, but sometimes I want to try an alternate route and see where this goes. And that can branch again in many places. See what…
In plain words
1667 is a terminal-based writing environment for fiction authors working with language models. It organizes stories as branching trees, allowing writers to generate multiple versions of scenes and explore different narrative paths while keeping all attempts. Projects are stored as plain-text files on the user's computer with no tracking. The tool is designed for developers comfortable working in terminals and supports macOS and Linux systems.
written from the facts on this page · September 2026
From the sources
A full-screen terminal environment for writing fiction with language models. Keep every take in a story tree. Plain-text files and no tracking of any kind.
Write a paragraph, then ask 1667 for the next one. Keep every take, compare versions with the arrow keys, and continue the story line you choose. Projects stay in folders on your computer. Installs 1667 0.10.8. Supports macOS arm64/x64 and glibc 2.17+ Linux arm64/x64. Run 1667 upgrade for later managed releases. Installs 1667 0.10.8 on Windows x64. Exit 1667 and run this command again to install a later release. Needs Node 22. npm manages this installation. Use npm to install later releases. Needs Bun 1.3.14 or later, and Node 22. Git manages this installation. This optional path needs GitHub CLI. It verifies version 0.10.8 before it runs the local file. 1667 homepage demo The opening write…from 1667.ai
In the maker’s words, at launch
Hi HN. I built 1667 for my own fiction work and now use it each day. This probably has a limited audience. Maybe an audience of one... Why a terminal interface for story writing? I'm a dev. I like to use terminals for a lot of stuff. Most WebUIs feel off to me. That's the only reason. One thing that bothers me about writing in existing tools is that they don't fit the way I write. The mental model of my story is a tree. I try many takes usually continue with just one, but sometimes I want to try an alternate route and see where this goes. And that can branch again in many places. See what happens if I kill off this character or they don't take the job or whatever. 1667 is a full-screen terminal app for long-form fiction. Each story part can have several takes. All takes stay in a tree. You select one path through that tree as the story line. Export writes that line to Markdown in the project folder. Some technical details: - A project stores its stories and settings in a `.1667/` directory. Exported Markdown sits beside it. - Provider secrets stay in private machine files. Requests go to the provider that the writer selects. - An optional Vault Password seals project files at rest. - An operating-system lock permits one writer process for each project. - The request viewer shows the next provider request without its credential. - Each generated take keeps a Generation Record with its model and effective settings. Version 0.9.5 runs on macOS, Linux, and Windows x64. The website has Shell and PowerShell installers. An npm package is also available. 1667 imports Markdown, SillyTavern chats and cards, and NovelAI archives. It can use OpenAI-compatible, Anthropic, and local endpoints such as Ollama, LM Studio, llama.cpp, and KoboldCpp. Current limits: the release is pre-1.0. The interface is a terminal. There is no account or cloud sync, and I don't plan to add any. No tracking.
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