export type SourceLocation = {
    nodeId: string;
    moduleId: string;
    scopeName: string;
    stepPath: string;
    /** The branch keys from the root stack down to the stack the step ran
     *  on. Absent or empty for a step on the root stack. */
    branchPath?: string[];
    /** Set when the location is one of the tool loop's own stops, before a
     *  model request (`round`) or before a tool call (`tool`), rather than
     *  a statement. Such a location is under the `llm()` statement: its
     *  `stepPath` is the statement's path, a slash, and the loop's step key. */
    loopStop?: LoopStopKind;
};
export type LoopStopKind = "round" | "tool";