diff --git a/.jules/bolt.md b/.jules/bolt.md
index 57daf471..1263f3bc 100644
--- a/.jules/bolt.md
+++ b/.jules/bolt.md
@@ -3,3 +3,9 @@
 **Learning:** `Date.parse(value)` returns the timestamp primitive directly, while `new Date(value).getTime()` also constructs a `Date` object. Both use the same ECMAScript string-parsing semantics for these call sites.
 
 **Action:** In frequently executed paths that only need a timestamp primitive, prefer `Date.parse(value)`. Treat the allocation reduction as a bounded micro-optimization unless a committed benchmark establishes a larger runtime effect.
+
+## 2026-10-09 - `Math.max` array spread optimization with `useMemo`
+
+**Learning:** When using `Math.max(...array)` on potentially large arrays within React components, it triggers the spread operator on every render, which can lead to 'Maximum call stack size exceeded' for very large arrays, and recalculates unnecessarily.
+
+**Action:** In React components that render lists or depend on max value calculations from array props, use `.reduce()` instead of the spread operator to prevent call stack issues, and wrap the calculation with `useMemo` to prevent recalculation on every render.
diff --git a/packages/web/src/app/dashboard/[orgSlug]/settings/members/page.tsx b/packages/web/src/app/dashboard/[orgSlug]/settings/members/page.tsx
index 5d6ef680..bba5b871 100644
--- a/packages/web/src/app/dashboard/[orgSlug]/settings/members/page.tsx
+++ b/packages/web/src/app/dashboard/[orgSlug]/settings/members/page.tsx
@@ -83,7 +83,7 @@ function MembersTable({
   const removeMember = useRemoveMember(orgSlug)
   const [errorByUser, setErrorByUser] = useState<Record<string, string>>({})
 
-  const maxCost = Math.max(...members.map((m) => m.sevenDayCostUsd), 0)
+  const maxCost = members.reduce((max, m) => Math.max(max, m.sevenDayCostUsd), 0)
   const canChangeToOwner = currentRole === 'OWNER'
   const adminCount = members.filter(
     (m) => m.role === 'OWNER' || m.role === 'MANAGER'
diff --git a/packages/web/src/components/dashboard/reports/delegation-insight.tsx b/packages/web/src/components/dashboard/reports/delegation-insight.tsx
index ecb6b7c4..f3bb86f4 100644
--- a/packages/web/src/components/dashboard/reports/delegation-insight.tsx
+++ b/packages/web/src/components/dashboard/reports/delegation-insight.tsx
@@ -28,7 +28,7 @@ export function DelegationInsight({ insight, orgSlug }: DelegationInsightProps)
     )
   }
 
-  const maxCount = Math.max(1, ...insight.topAgents.map((a) => a.callCount))
+  const maxCount = insight.topAgents.reduce((max, a) => Math.max(max, a.callCount), 1)
 
   return (
     <ChartCard