Does it write the book for me?
No. It writes a paragraph when you ask for one, in the direction you gave it, and then it stops and waits. You choose the take, you cut the line, you decide what the chapter is. The judgement stays yours.
What happens to the takes I don't use?
They stay. Every take is written to the tree the moment it exists, and moving to another one changes nothing about it. The map shows you all of them, including the lines you abandoned after a single paragraph. Only d removes a take.
Is anything collected about me?
No. There is no analytics code, no telemetry, no crash reporter and no install id in the source. Every request the program makes goes to the endpoint you configured, with one exception: an optional update check, which ships off. Turned on, it reads a version number and tells you. It downloads nothing.
Why 1667?
1,667 words a day for thirty days is fifty thousand, which is the pace that finishes a first draft. The number names that pace. Nothing in the program tracks whether you hit it.
Where does my writing live?
In a folder you chose. Run 1667 init in ~/book and that is your project. Export writes the selected story line to Markdown in the same place. Back it up like any other directory. There is no export step to be trapped behind.
Which models can I use?
Anything behind an OpenAI or Anthropic compatible endpoint. Presets ship for OpenAI, Anthropic, OpenRouter, Ollama, LM Studio, llama.cpp, KoboldCpp, and a custom endpoint. Keys are stored in a private file on your machine and sent only to the provider they belong to. A model running locally needs no key at all.
Do I need to be good at the terminal?
You need to be able to open one. After that it is arrow keys to move, space to continue, and ? for the rest. There is no shell scripting and no configuration file to hand-edit. Settings are a panel behind the comma key.
Can I run it on Windows?
Yes. The native Windows x64 release uses the PowerShell Installer. Exit 1667 and run the same command again for a later release.
What does it cost?
Nothing. It is Apache-2.0 source with no paid tier, because there is no server to pay for. You pay whatever your model provider charges, directly to them, or nothing at all if you run a model locally.