AI Studio  ·  Optional plugin  ·  Disabled by default  ·  Bring your own provider

The AI Studio.

The Draftline editor contains no AI. The AI Studio is a separate plugin that is switched off on a fresh install, and even after you enable it in Settings it cannot send a word anywhere until you connect a provider of your own. What it does, once connected, is run editing passes over prose you have already written and show you every proposed change as a diff.

If you never turn it on, you will never see it.

Line edit pass Chapter 8 · ¶ 14 Suggestion 3 of 11
She walked in a quick manner briskly across the room that was dark, the dark pressing in from the corners, and she stopped at the window.
Each change is a suggestion. Nothing is applied to the manuscript until you accept it.
What it does

The editing passes.

Line edit
You select a passage and ask for a line edit, and the Studio proposes changes to rhythm, word choice, redundancy, and weak verbs while leaving the content of every sentence intact. Only the paragraphs that changed come back from the provider, which cuts the output by roughly eighty percent and matters if you are paying for tokens on your own key.
Copy edit
Grammar, punctuation, consistency, and house style, which is the unglamorous pass that separates a manuscript from a draft. If you cannot afford a professional copy editor for a first book, this is the pass that gets the text presentable, and if you can, it is the pass that makes their hours count.
Expand
When a scene is all skeleton, you can ask the Studio to add sensory detail, internal thought, or atmosphere to it, with the style mixer setting how much of each it is allowed to introduce. This is the one pass that produces new sentences, and it produces them inside a passage you wrote, for you to keep, cut, or rewrite word by word.
Smooth and Custom
Smooth works on flow: repetition, transitions, and sentence openings that have started to sound alike. Custom takes an instruction in your own words, such as "make this more suspenseful," and you can also leave one inline in the manuscript as an @ai note for the Studio to pick up when it runs.
Providers and voice

Your provider, your style.

Draftline operates no AI service and holds no account for you. You connect Claude Code, the Anthropic API, OpenAI, Gemini, Grok, or any OpenAI-compatible local endpoint, and if you point it at a model on your own hardware nothing ever crosses the network. To keep an edit from flattening your voice, the style mixer gives you eight dials, each from zero to three, for metaphors, similes, sensory detail, internal thought, dialogue, action, description, and pacing, and you can paste a sample of your own prose as a guide the Studio has to match.

✓Disabled by default — a fresh install shows no AI controls until you enable the plugin
✓Bring your own key — nothing can be sent until you connect a provider yourself
✓Local models — an endpoint on your own machine keeps the text off the network entirely
✓Works on the passage you select — you choose what the Studio sees
Scope

What it does not do.

The Studio's scope is editing. It works on prose you have already written, at the length you select, and the story stays yours because the only text it ever produces is a proposed revision of text you gave it. Since the fiction world is right to be wary of tools that quietly draft for you, these are the boundaries as they stand.

✕It never drafts your story — every pass starts from a passage you wrote
✕It never edits silently — every change is a reviewable suggestion, and nothing is applied until you accept it
✕It never contacts anyone but your provider — text goes to the service you connected, only when you run a pass
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