Cowriter Agent

Cowriter is the AI writing assistant that sits next to your document. You tell it what you want in plain language — “make this more formal”, “add citations to the second paragraph”, “check the grammar and fix the errors” — and it does the work for you, then shows you exactly what it changed so you stay in control. Think of it as a writing partner that can read your whole document, not just the sentence you’re on.

How to find it

• Open the Cowriter tab in the right-hand panel of the editor to start a chat.
• Or press Cmd+K in the editor for a quick, one-off request without opening the full chat.

Cowriter is available on every plan. Your plan affects how powerful the assistant is and how much you can use it.

What it does

Cowriter can do almost anything you’d otherwise reach for a separate tool to do:

• Rewrite text to be more formal, more academic, simpler, or more concise
• Fix grammar and spelling, and explain why something is wrong
• Translate a passage between your languages
• Find academic sources and add citations to your claims
• Check whether a passage reads as AI-generated, and rephrase it so it sounds like you
• Check text for plagiarism
• Answer questions about your document — and about Diglot itself
• Search your own research library and the web when you need supporting material

You describe the goal; Cowriter figures out the steps. Every change it makes is applied as a visible suggestion you can accept or reject — one by one if you like.

Three ways to work

Ask — for questions, no changes made. Use it for things like “what’s wrong with this paragraph?”, “does this section read as AI-written?”, or “where could this argument be stronger?” Cowriter reads and answers, but won’t touch your text.

Edit (the default) — for making changes. Cowriter reads your document, decides what to do, and proposes edits. You review each one and accept or reject it. Use it for “make this more academic”, “translate this paragraph”, or “fix all the grammar issues”.

Plan — for bigger, multi-step jobs. Cowriter first writes out a plan (“1. replace contractions, 2. strengthen topic sentences, 3. cut redundant words, 4. tighten the conclusion”), you tick the steps you want, and then it works through them one at a time. Great for “rewrite this essay to sound more formal and tighten the arguments.”

Watching it work

Changes appear in your document as you go, highlighted as suggestions. A bar at the top lets you accept or reject everything at once, or you can go through them individually. If Cowriter is thinking through a tricky request, you’ll see a collapsible “Thinking” note you can open to follow its reasoning.

You can stop Cowriter at any time with the Stop button — any edits it already proposed stay as pending suggestions, so nothing is lost.

Sessions

Each document can have several Cowriter conversations, like separate threads. They’re saved between visits, get an automatic title from your first message (“Polish intro”, “Fix citations”), and old ones can be archived. Quick Cmd+K requests are saved into your active conversation too, so you can start with a fast edit and then keep talking in the chat panel.

Limitations

• Cowriter only changes what you ask it to — it won’t quietly rewrite your whole document.
• Every change goes through the suggestion overlay, so you always get the final say, and normal Undo (Cmd+Z) still works.
• Each tool Cowriter uses (grammar, plagiarism, citations, and so on) counts toward that tool’s usage on your plan, just as if you’d run it yourself.

Common questions

• How is this different from ChatGPT? ChatGPT writes text in a separate window with no view of your document. Cowriter sees your full document, uses Diglot’s specialized tools (grammar, plagiarism, citations, and more), and applies changes as reviewable suggestions. It’s an editing partner, not a text generator.
• Will it rewrite my whole document? No — only what you ask for. In Edit mode you describe the change; in Plan mode you approve each step.
• Can I undo what Cowriter did? Yes. You can reject any suggestion before accepting it, and standard Undo (Cmd+Z) works for anything you’ve accepted.
• What does the “Thinking” note show? The assistant’s reasoning before it makes a change. It’s collapsed by default — open it if you’re curious how it reached a decision.
• Can I use Cmd+K and the chat together? Yes. A quick Cmd+K edit is saved into your active chat session, so you can switch to the panel and keep refining.
• What happens with very long documents? Cowriter always keeps your document’s outline and the section you’re working in close at hand, and pulls in other sections as needed — so it works on long documents without losing the thread.