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

# Mention agents in case comments

> Invoke a preset agent from a case comment, follow its reply, and inspect the full agent session.

<Badge icon="lock" color="blue" size="lg" shape="pill">Enterprise Edition</Badge>

Mention a preset agent when you want it to investigate a case or respond in a comment thread.
Tracecat posts the agent's final answer as a reply and keeps its full run in case chat history.

## Before you start

Your organization needs the agent add-ons and case add-ons entitlements.
Your workspace role also needs:

* `agent:read` to find preset agents in autocomplete.
* `agent:execute` to invoke the selected agent.
* `case:update` to create the comment.

Without these requirements, `@` behaves as regular comment text and never starts an agent run.

## Mention an agent

1. Open a case and start a new comment or reply.
2. Type `@`, then enter part of the preset agent's name.
3. Select the agent from the autocomplete list.
4. Add your request and submit the comment.

<img src="https://mintcdn.com/tracecat/VONATvpiLqt0Nk54/img/cases/agent-mention-composer.png?fit=max&auto=format&n=VONATvpiLqt0Nk54&q=85&s=cd5f8cc54f397e2d48363f8e41504683" alt="Select an agent in a case comment" width="1280" height="720" data-path="img/cases/agent-mention-composer.png" />

Selecting the autocomplete result creates the mention.
Typing an agent name as plain text does not invoke it.

Tracecat invokes agents only when you create a comment.
Editing an existing comment to add a mention never starts a run; create a new comment instead.

## Follow the response

The comment thread shows when each mentioned agent is preparing, running, or unable to finish.
Multiple mentions run independently and can finish in any order.

<img src="https://mintcdn.com/tracecat/VONATvpiLqt0Nk54/img/cases/agent-mention-reply.png?fit=max&auto=format&n=VONATvpiLqt0Nk54&q=85&s=d0f2b8e8947060214b9f3c5412dfe27b" alt="Agent activity and reply in a comment thread" width="1280" height="720" data-path="img/cases/agent-mention-reply.png" />

When the run succeeds, Tracecat posts the final answer as an attributed reply in the same thread.
If a run fails, mention the agent in a new comment to try again.

Agent replies have the same 25,000-character limit as other comments.
Tracecat adds `[Agent output truncated]` when a longer response reaches that limit.

## Agent context

The agent receives the current case context and the comment thread that contains the mention.
The context identifies the mentioning user and asks the agent to write a self-contained reply.

Each mention starts a new agent session.
Later mentions receive the updated comment thread, but they do not receive another session's private working transcript.

## View the full session

Select `View session` from the agent activity or attributed reply to open the exact case chat session.
The session contains the full transcript, including tool calls, errors, and approval pauses that do not appear in the comment reply.

<img src="https://mintcdn.com/tracecat/VONATvpiLqt0Nk54/img/cases/agent-mention-session.png?fit=max&auto=format&n=VONATvpiLqt0Nk54&q=85&s=e8e955639ae71a3ddf51d0047e38b41c" alt="Comment agent session in case chat history" width="1280" height="720" data-path="img/cases/agent-mention-session.png" />

Comment-created sessions have a `From comment` badge in the case chat history.
Use the history search to find these sessions after the comment thread is no longer visible.

## Related pages

* See [Cases](/automations/cases) to configure and manage case records.
* See [AI agent](/agents/ai-agent) to configure agent tools, outputs, and approvals.
* See [Comment triggers](/automations/triggers/comment-triggers) to run a workflow from a case comment instead of invoking a preset agent.