Function: isRunStatus()

function isRunStatus(value): value is RunStatus;

Defined in: packages/ai/src/activities/chat/middleware/run-store.ts:69

Whether value is a RunStatus — the guard a backend validates a row with at DESERIALIZATION.

RunStatus is a compile-time claim about a storage column. A row arrives as JSON out of D1, a Durable Object, or Postgres, and nothing in the type system checked what that column actually held, so a RunStore implementation should run its row's status through this before handing the record on. The readers downstream act DESTRUCTIVELY on the answer — @tanstack/ai-sandbox's journal sweep DELETES the journal of a run it believes terminal — so a row that lies about its status is not a display bug.