The interface

Inside a project, the screen has three parts: a slim sidebar for navigation, the canvas holding your notebook, and the chat panel where you talk to the agent. Once you know what each does, the rest is easy to find.

The Clusy workspace: sidebar on the left, the notebook canvas in the middle, and the chat panel docked on the right

Sidebar

The left column is navigation. Three tabs:

• Chats: your sessions for this project. Switch between them or start a new one.
• Files: the workspace file browser. Upload datasets, download output, see what's on disk. See Data & files.
• Git: diffs and commit history once you've connected a repo.

Chat

The chat panel is where you talk to the agent. Your messages and its replies flow top to bottom. The input box is pinned at the bottom, with the model picker and runtime picker right there so you can change either before you send. The bar at the top of the panel shows which session you're in, and clicking it lets you jump between this project's sessions or start a new one without going through the sidebar.

The panel isn't fixed in place. Drag it by its header and it can end up in three places, depending on where you let go:

• Docked left or docked right, if you drop it near either edge of the canvas. Pick whichever side you like your conversation on.
• A floating bubble, if you drop it in the middle. The chat collapses to a small card over the notebook, handing the full width to your cells. Click the bubble to expand it and keep talking; drag it back to an edge to dock it again.

Clusy remembers which of the three you chose and puts the chat back there next time.

The agent's work shows up as inline cards: a plan, a collapsible reasoning block, a suggestion to accept or skip, a tool call you can expand. Working with the agent covers them.

Canvas

The canvas holds your notebooks. It opens the first time the agent creates a cell, and stays hidden until then so a new project isn't cluttered. There's a tab bar (you can open more than one notebook) and the notebook itself. When you're branching, the branch control sits at the top right of the canvas, and forks appear inline in the notebook at the cell they diverge from. The canvas also previews files: click a CSV in the Files tab and it opens as a spreadsheet-style tab, and documents like PDFs open in a preview tab of their own.

Resizing and small screens

The thin bars between columns are drag handles. Pull them to give chat or canvas more room, and the split sticks. On narrower screens the columns collapse down: the sidebar becomes an overlay, and on a phone you get one panel at a time with a bottom tab bar.

Looks and layout live in Settings → Appearance. Alongside Light, Dark, and System, there are specialty palettes like Midnight, Sepia, Nord, and High Contrast, plus controls for text size and density. Clusy respects your system "reduce motion" setting.