mental-model

Scope: Core execution mental model.
Audience: New readers.
Guarantees: One shared mental model.
Non-Goals: Implementation detail.
Why: This doc exists to record its single responsibility for review.

Overview

Think of a run as a flow that decomposes into ordered steps, each emitting events that become artifacts, and those artifacts define replay.

Flow → Steps → Events → Artifacts → Replay

If you can explain that chain, you can explain the system.