Method operatorInfo

src/compute-engine/index.ts:1192–1200

(head: string)

      kind: event.kind,
      axis: 'type',
      cause: ctx?.expr,
      epoch: currentBoxingEpoch(this),
    });

    if (
      event.valueDef !== undefined &&
      event.from.isUnknown &&
      this._inferenceTxDepth > 0
    ) {
      const set = (this._freshlyInferred ??= new Set());
      // Rollback journal (family 6): `.add()` is a silent no-op on a member
      // already present, so record the prior-presence bit — the undo must