Trajectories now in LangSmith: A readable view of every agent session

LangSmith has introduced Trajectories, a feature that presents a clear, chronological view of agent sessions by aggregating messages and actions across agents and subagents. This simplifies debugging of complex, multi-turn workflows by showing the agent's path in an easy-to-read format. Trajectories support data from various agent SDKs and enable scoring and routing for evaluation and annotation.