The interface

Inside a project, the screen splits into three columns. Once you know what each does, the rest is easy to find.

┌──────────┬───────────────────┬─────────────────────────────┐
│ Sidebar  │   Chat            │   Canvas                    │
│          │                   │                             │
│ Chats    │  the agent        │  notebook tabs              │
│ Files    │  conversation     │  cells + output             │
│ Git      │                   │  branch views               │
│          │  input box        │  panels (terminal,          │
│ branch   │  model · runtime  │  variables)                 │
└──────────┴───────────────────┴─────────────────────────────┘

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.

The active branch sits at the bottom.

Chat

The middle column 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 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 right column 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), the notebook itself, and collapsible panels at the bottom for the terminal and variable inspector. When you're branching, the tree view lives here too.

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 and an advanced editor for building a theme of your own. Clusy respects your system "reduce motion" setting.