# Task assignee changed

Source: https://neondeerdata.com/docs/platform/automations/triggers/task-assignee-changed/

Trigger · Tasks

Starts a run when workspace members are added to or removed from a task.

**Attio events:** `task.created` , `task.updated`

## Inputs

No configuration.

## Outputs

| Label               | Key                   | Type            | Always set | Notes                                                                                                               |
| ------------------- | --------------------- | --------------- | ---------- | ------------------------------------------------------------------------------------------------------------------- |
| Task                | `task`                | Task            | Yes        |                                                                                                                     |
| Task ID             | `task_id`             | Text            | Yes        |                                                                                                                     |
| Triggered at        | `triggered_at`        | Timestamp       | Yes        |                                                                                                                     |
| Updated by          | `updated_by`          | Actor           | No         | Present only when Attio sends an actor of a recognized type (workspace member, API token, system, app or workflow). |
| New assignees       | `new_assignees`       | List of actors  | Yes        |                                                                                                                     |
| Previous assignees  | `previous_assignees`  | List of actors  | Yes        |                                                                                                                     |
| Content             | `content`             | Text            | Yes        |                                                                                                                     |
| Deadline            | `deadline_at`         | Date            | No         | Date only (YYYY-MM-DD). The time of day is dropped.                                                                 |
| Linked record count | `linked_record_count` | Number          | Yes        |                                                                                                                     |
| Linked records      | `linked_records`      | List of records | Yes        | Iterable in a Loop block. Records whose object cannot be resolved to a slug are left out.                           |

## How it behaves

- Compares the task’s current assignees with the stored prior list; starts a run only when the list differs.
- Only assignees that are workspace members are tracked. Changes involving other assignee types are not detected.
- Needs a stored prior value for the task. The first event for a task the app has never seen stores the value and does not start a run.

## Errors

Triggers have no error branch. When something goes wrong inside a trigger, no run starts. See [Troubleshooting](https://neondeerdata.com/docs/platform/automations/troubleshooting/).

## Notes

- Added and removed members are not output directly. Wire Previous assignees into Set A and New assignees into Set B of Compare members.

## Example

Notify a rep when a task is reassigned to them.

**Example inputs**

| Event          | Value                                                         |
| -------------- | ------------------------------------------------------------- |
| `task.updated` | Maya Chen reassigns "Prepare QBR" from herself to Priya Shah. |

**Example outputs**

| Output              | Value                                |
| ------------------- | ------------------------------------ |
| Task                | Prepare QBR                          |
| Task ID             | 4c5d6e7f-8a9b-4c0d-9e1f-2a3b4c5d6e7f |
| Triggered at        | 2026-10-07T13:01:37Z                 |
| Updated by          | Maya Chen (workspace member)         |
| New assignees       | Priya Shah                           |
| Previous assignees  | Maya Chen                            |
| Content             | Prepare QBR                          |
| Deadline            | 2026-10-21                           |
| Linked record count | 1                                    |
| Linked records      | Acme Corp (companies)                |

To get who was added and who was removed, wire Previous assignees into Set A and New assignees into Set B of Compare members.