trajectory

Definition

One time-ordered run through a process: the sequence of states, actions, and observations produced by following a policy in an environment. In reinforcement learning it is the unit of experience that credit assignment operates over. In agent work the same word covers the full execution log — every tool call and its result — and filtering trajectories down to the successful ones is a standard way to build fine-tuning data.

Explainers using this term

• Paper Walkthrough: Turning Game Development into a Verifiable Trajectory Data Engine — RLHEV and AWoMoAgentic Game Development as a Verifiable Trajectory Data Engine for Scaling World Models