Trajectory

Represents trajectory information for an agent’s reasoning or tool execution

Python SDK Reference / A2A Extensions / UI Extensions / Trajectory

from agentstack_sdk.a2a.extensions.ui import Trajectory

Bases: BaseModel steps. Helps track the agent’s decision-making process and provides transparency into how the agent arrived at its response.

Trajectory can capture intermediate steps like:

• A reasoning step with a message
• A tool execution with tool name, input, and output

This information can be used for debugging, audit trails, and providing users with insight into the agent’s thought process.

Visually, this may appear as an accordion component in the UI.

Properties:

• title: Title of the trajectory update.
• content: Markdown-formatted content of the trajectory update.

Class Attributes

Attribute	Type	Default
title	str | None	None
content	str | None	None
group_id	str | None	None