diff --git a/mcp/src/benchmark/sessions.ts b/mcp/src/benchmark/sessions.ts
index 34dea680c..9289c5a09 100644
--- a/mcp/src/benchmark/sessions.ts
+++ b/mcp/src/benchmark/sessions.ts
@@ -2,6 +2,7 @@ import { Request, Response } from "express";
 import { existsSync, readdirSync, readFileSync, statSync } from "fs";
 import path from "path";
 import { db } from "../graph/neo4j.js";
+import { toNum } from "../graph/types.js";
 import {
   loadStepMeta,
   loadSearchProvenance,
@@ -140,13 +141,6 @@ function parseSessionMessages(filePath: string): {
   };
 }
 
-function toNum(v: any): number {
-  if (v == null) return 0;
-  if (typeof v === "object" && typeof v.toNumber === "function")
-    return v.toNumber();
-  return Number(v) || 0;
-}
-
 function calcCost(
   model: string,
   providerHint: string,
diff --git a/mcp/src/graph/types.ts b/mcp/src/graph/types.ts
index 5318b68fb..a027451b5 100644
--- a/mcp/src/graph/types.ts
+++ b/mcp/src/graph/types.ts
@@ -3,7 +3,7 @@ export interface Node {
   node_data: NodeData;
 }
 
-export type BoltInt = number | { low: number; hight: number };
+export type BoltInt = number | { low: number; high: number };
 
 export interface Neo4jNode {
   identity?: BoltInt; // built-in on some queries
@@ -330,12 +330,9 @@ export function normalizeNodeType(label: string): NodeType | undefined {
 }
 
 export function toNum(bi: BoltInt): number {
-  if (typeof bi === "object") {
-    if (bi.low) {
-      return bi.low;
-    }
-  } else {
-    return bi;
+  if (typeof bi === "number") return bi;
+  if (bi && typeof bi.low === "number") {
+    return (bi.high ?? 0) * 2 ** 32 + (bi.low >>> 0);
   }
   return 0;
 }