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

# Workspaces and Filesystems

> How `/workspace`, persistent filesystems, archive sync, and single-file operations fit together

Filesystems are one of the core Terminal Use primitives. They deserve a concept page, not just endpoint docs.

## The Model

* A filesystem is persistent storage.
* A task can attach a filesystem.
* The task sees that filesystem at `/workspace`.

That means `/workspace` is a runtime mount of a persistent resource, not just a scratch directory.

## Three Different File Flows

### 1. Whole-Filesystem Archive Flow

Use this for directory-level push and pull.

* `tu fs push`
* `tu fs pull`
* `get_upload_url`
* `get_download_url`

These flows move archives, not individual files.

### 2. Single-File Flow

Use this for exact path-level reads and writes.

* `upload_file`
* `download_file`
* `get_file`
* `list_files`

This is the right surface when you want one path, one payload, or conditional write semantics.

### 3. Runtime Sync Flow

Use this inside Python agent code when you need explicit sync during handler execution.

* `adk.filesystem.sync_down`
* `adk.filesystem.sync_up`
* `adk.task.sync_down_system_folder`
* `adk.task.sync_up_system_folder`

## Writable vs Read-Only `/workspace`

`/workspace` is not always writable.

* writable when the caller can update the attached filesystem
* read-only when the caller can run the task but lacks update permission
* tmpfs when no filesystem is attached

## Projects Matter

Filesystems inherit their permission boundary from the parent project. If you are designing a multi-tenant or access-controlled app, project design is part of the filesystem model.

## Read Next

* [List Filesystems](/api-reference/filesystems/list)
* [Filesystem Sync](/advanced/filesystem-sync)
* [Access Control](/concepts/access-control)

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