Journal Event • AI Agent SDK

JournalEvent: A single append-only journal event.

JournalEvent

Defined in the journal module.

A single append-only journal event.

`(run_id, seq, kind) is the natural key: a step number seq produces at most one event of each kind (e.g. a tool step has one tool_call and one tool_result). payload is any JSON-serialisable dict — the decision text, {name, args, idempotency_key}, the tool result, the approval decision, or {index}`.

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