diff --git a/.github/workflows/sonar-bulk-accept.yml b/.github/workflows/sonar-bulk-accept.yml
index e7d9df1..9101681 100644
--- a/.github/workflows/sonar-bulk-accept.yml
+++ b/.github/workflows/sonar-bulk-accept.yml
@@ -252,8 +252,19 @@ jobs:
           bulk_accept "S1871 duplicate-case" "${KEYS}" \
             "Cases document distinct semantic categories sharing one code path. Accepted."
 
+          # Bucket 21: go:S3776 + typescript:S3776 — cognitive complexity
+          # Remaining occurrences are in HTTP handlers, tailers, attention
+          # engine eval, and other linear-branching lifecycle code where
+          # the complexity comes from breadth of cases, not nesting depth.
+          # Extracting helpers used once would create indirection without
+          # meaningfully reducing reader load. Accepted as a project-wide
+          # judgement call rather than per-function.
+          KEYS=$(fetch_keys "go:S3776,typescript:S3776")
+          bulk_accept "S3776 cognitive-complexity" "${KEYS}" \
+            "Production handlers / engines: complexity is breadth of cases, not nesting. Extracting single-use helpers harms readability. Accepted."
+
           # ─────────────────────────────────────────────────────────────
-          # Bucket 21: ALL remaining smells in *_test.go / *.test.ts(x)
+          # Bucket 22: ALL remaining smells in *_test.go / *.test.ts(x)
           # Test code is intentionally dense (table-driven cases, mock
           # plumbing, deep ternaries to express expected outputs). The
           # cognitive-complexity / readonly / etc. rules are noise here.
diff --git a/ui/src/hooks/useTheme.tsx b/ui/src/hooks/useTheme.tsx
index 115574b..e9450bb 100644
--- a/ui/src/hooks/useTheme.tsx
+++ b/ui/src/hooks/useTheme.tsx
@@ -35,7 +35,7 @@ function loadPref(): ThemePreference {
 
 function resolve(p: ThemePreference): ResolvedTheme {
   if (p !== "system") return p;
-  if (typeof globalThis.window === "undefined") return "dark";
+  if (globalThis.window === undefined) return "dark";
   return globalThis.matchMedia("(prefers-color-scheme: light)").matches
     ? "light"
     : "dark";
diff --git a/ui/src/routes/Dashboard.tsx b/ui/src/routes/Dashboard.tsx
index 22aef86..99b5d4a 100644
--- a/ui/src/routes/Dashboard.tsx
+++ b/ui/src/routes/Dashboard.tsx
@@ -50,7 +50,7 @@ export function Dashboard() {
   useEffect(() => {
     if (name) return;
     if (!sessions || sessions.length === 0) return;
-    if (typeof globalThis.window === "undefined") return;
+    if (globalThis.window === undefined) return;
     if (!globalThis.matchMedia("(min-width: 768px)").matches) return;
     const top = sessions
       .filter((s) => s.is_active)
diff --git a/ui/src/routes/SessionDetail.tsx b/ui/src/routes/SessionDetail.tsx
index b918283..454ccb8 100644
--- a/ui/src/routes/SessionDetail.tsx
+++ b/ui/src/routes/SessionDetail.tsx
@@ -190,7 +190,7 @@ type FeedFilter = "all" | "bash";
 const FEED_FILTER_STORAGE_PREFIX = "ctm.feed.filter.";
 
 function readStoredFilter(sessionName: string): FeedFilter {
-  if (typeof globalThis.window === "undefined") return "all";
+  if (globalThis.window === undefined) return "all";
   try {
     const v = globalThis.sessionStorage.getItem(
       FEED_FILTER_STORAGE_PREFIX + sessionName,
@@ -219,7 +219,7 @@ function FeedTab({ sessionName }: { sessionName: string }) {
   }, [sessionName]);
 
   useEffect(() => {
-    if (typeof globalThis.window === "undefined") return;
+    if (globalThis.window === undefined) return;
     try {
       globalThis.sessionStorage.setItem(
         FEED_FILTER_STORAGE_PREFIX + sessionName,