Co-Writer

Co-Writer is a Markdown workspace for notes, reports, tutorials, and study drafts. Select a passage for a surgical edit, or run Rewrite, Shorten, Expand, and Auto Mark across the full draft. AI results replace the affected content immediately; Undo restores the prior version when you want it back.

Where it is

Open Co-Writer from the left sidebar (or visit /co-writer). The landing page lists your drafts; create one with New draft, start from From template, or use Import Word to convert a .docx into a draft.

The Co-Writer landing page: draft cards with a New draft and From template button

The editor

Open a draft to get a split workspace: the Markdown source on the left, a live preview on the right. Math renders with KaTeX, and diagram fences render as diagrams, so the preview is a faithful picture of the finished document as you type.

The Co-Writer editor: Markdown source on the left, live rendered preview on the right

Control	What it does
Editor / Preview	Write Markdown on the left; see headings, bold, tables, code, math, and diagrams rendered on the right.
Sync Scroll	Keep both panes aligned as you scroll.
Export Markdown / Word	Download the current draft as Markdown or `.docx`.
Save to Notebook	Copy the current draft into a reusable notebook.
Full Draft	Open whole-document Rewrite, Shorten, Expand, and Auto Mark actions.

AI edits, grounded and surgical

Select text for Rewrite, Expand, or Shorten. The request carries the selection, instruction, mode, model choice, retrieval tools, and optional KB name — never the surrounding draft. The model selector also applies to Full Draft and Auto Mark; KB or web results can ground edits. Co-Writer is useful for:

tightening an explanation without changing section structure,
expanding bullets into teaching prose,
shortening a draft before a notebook save,
grounding a claim in a KB or web source.

Full Draft runs those actions across the document; Auto Mark annotates it. Selection and full-draft results apply immediately, so review in place and use Undo when needed.

Recommended workflow

Draft roughly in Markdown.
Select a passage, or open Full Draft for a document-wide pass.
Run Rewrite, Expand, or Shorten, optionally grounded by a KB or the web; Auto Mark annotates the full draft.
Review the applied result and use Undo if needed.
Export as Markdown / Word, or save the result into a Notebook.

Storage

Co-Writer documents live under the active user workspace, so multi-user deployments keep each user’s drafts isolated. Partners can use notebook/skill resources copied from a user’s library, but they do not edit a user’s Co-Writer drafts.