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

# workstream_join

> Join an existing workstream

## Overview

Join a workstream that another agent started. Your session is moved onto `ena/<slug>` and symbol-level coordination with the other participants is enabled — file reservations can be narrowed to specific symbols and negotiations can open over contested ones.

## Parameters

| Parameter    | Type   | Required | Description             |
| ------------ | ------ | -------- | ----------------------- |
| `slug`       | string | Yes      | Workstream slug         |
| `session_id` | string | No       | Your current session id |

## Example

```json theme={null}
{
  "tool": "workstream_join",
  "arguments": { "slug": "stripe-subscription-upgrades" }
}
```

Use [`workstream_list`](/mcp/workstream-list) first to find the slug.