> ## Documentation Index
> Fetch the complete documentation index at: https://docs.viorant.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Tabs & editors

> How the Hub opens each asset in its own purpose-built editor tab.

The Hub works like a code editor: a strip of **tabs** across the top, each holding an
open asset in a **purpose-built editor**. Open a prompt and you get the prompt editor;
open an agent and you get the agent canvas — the editor matches the kind of file.

## One tab per asset

Every asset you open in a [Space](/concepts/spaces) gets its own tab. Switch between
them freely; your open tabs are remembered per Space, so reopening a Space restores
what you were working on.

## The editor matches the file

* A **[Prompt](/masters/prompt)** opens the prompt editor — sections, variables, and a
  test panel.
* A **[Model](/masters/model)** opens its configuration.
* A **[Skill](/masters/skill)** opens the `SKILL.md` editor.
* An **[Agent](/masters/agent)** opens the composition canvas.

## Saving and versions

Edits autosave as you type. A tab shows a **dirty** marker when it has changes you
haven't committed yet — committing snapshots a version you can return to later.

<Card title="Compose an agent" icon="bot" href="/masters/agent">
  Bring a prompt, a model, and skills together into one runnable agent.
</Card>