Definition
Plain language
A standard format AI agents use to pass detailed notes to each other between sessions.
As stated in the literature
Typed inter-agent artifacts (e.g., Meta-Traces, evidence DAGs, structured notes) carrying investigation state, evidence, and instructions across long-horizon multi-agent workflows.
Why it matters: It prevents context loss and rework when long tasks span multiple agents or sessions, which is otherwise a major source of failure.
For example, a research agent finishing its shift might pass a structured note listing which sources it checked, which leads are still open, and which claims are confirmed.