diff --git a/config/instance-config.js b/config/instance-config.js
index dfa246ec..f2c341d5 100644
--- a/config/instance-config.js
+++ b/config/instance-config.js
@@ -23,6 +23,15 @@
  */
 export const IS_DEV_MODE = true;
 
+/**
+ * Whether development builds should surface extra verbose diagnostics.
+ *
+ * Set this to `true` to keep high-volume development warnings (like COUNT
+ * request failures) visible in the console. Flip it to `false` when you want
+ * a quieter dev mode without disabling other development helpers entirely.
+ */
+export const IS_VERBOSE_DEV_MODE = false;
+
 /**
  * Whether the current deployment should operate in lockdown mode.
  *
diff --git a/js/config.js b/js/config.js
index 7a07c770..2864a36d 100644
--- a/js/config.js
+++ b/js/config.js
@@ -3,6 +3,7 @@
 import { userLogger } from "./utils/logger.js";
 import {
   IS_DEV_MODE,
+  IS_VERBOSE_DEV_MODE,
   IS_LOCKDOWN_MODE,
   ADMIN_SUPER_NPUB,
   ADMIN_DM_IMAGE_URL,
@@ -43,11 +44,15 @@ import {
 export const isDevMode = Boolean(IS_DEV_MODE);
 export { IS_DEV_MODE };
 
+export const isVerboseDevMode = Boolean(IS_VERBOSE_DEV_MODE);
+export { IS_VERBOSE_DEV_MODE };
+
 export const isLockdownMode = Boolean(IS_LOCKDOWN_MODE);
 export { IS_LOCKDOWN_MODE };
 
 if (typeof window !== "undefined") {
   window.__BITVID_DEV_MODE__ = isDevMode;
+  window.__BITVID_VERBOSE_DEV_MODE__ = isVerboseDevMode;
   window.__BITVID_LOCKDOWN_MODE__ = isLockdownMode;
 }
 
diff --git a/js/nostr/client.js b/js/nostr/client.js
index 27249fc3..7483262f 100644
--- a/js/nostr/client.js
+++ b/js/nostr/client.js
@@ -58,6 +58,11 @@ import {
   listVideoComments as listVideoCommentsForClient,
   subscribeVideoComments as subscribeVideoCommentsForClient,
 } from "./commentEvents.js";
+import {
+  logCountTimeoutCleanupFailure,
+  logRelayCountFailure,
+} from "./countDiagnostics.js";
+import "./maxListenerDiagnostics.js";
 import {
   publishEventToRelay,
   publishEventToRelays,
@@ -345,7 +350,7 @@ function withRequestTimeout(promise, timeoutMs, onTimeout, message = "Request ti
         try {
           onTimeout();
         } catch (cleanupError) {
-          devLogger.warn("[nostr] COUNT timeout cleanup failed:", cleanupError);
+          logCountTimeoutCleanupFailure(cleanupError);
         }
       }
       reject(new Error(message));
@@ -5739,18 +5744,15 @@ export class NostrClient {
           });
           const count = this.extractCountValue(frame?.[2]);
           return { url, ok: true, frame, count };
-          } catch (error) {
-            const isUnsupported = error?.code === "count-unsupported";
-            if (isUnsupported) {
-              this.countUnsupportedRelays.add(url);
-            } else {
-              devLogger.warn(
-                `[nostr] COUNT request failed on ${url}:`,
-                error,
-              );
-            }
-            return { url, ok: false, error, unsupported: isUnsupported };
+        } catch (error) {
+          const isUnsupported = error?.code === "count-unsupported";
+          if (isUnsupported) {
+            this.countUnsupportedRelays.add(url);
+          } else {
+            logRelayCountFailure(url, error);
           }
+          return { url, ok: false, error, unsupported: isUnsupported };
+        }
       })
     );
 
diff --git a/js/nostr/countDiagnostics.js b/js/nostr/countDiagnostics.js
new file mode 100644
index 00000000..7f63c6b0
--- /dev/null
+++ b/js/nostr/countDiagnostics.js
@@ -0,0 +1,65 @@
+// js/nostr/countDiagnostics.js
+// Centralized helpers for gating high-volume COUNT diagnostics (and other
+// verbose nostr warnings) behind verbose dev mode while deduplicating repeated
+// messages so the console stays readable during normal development sessions.
+
+import { devLogger } from "../utils/logger.js";
+import { isVerboseDevMode } from "../config.js";
+
+const seenWarningKeys = new Set();
+
+export function isVerboseDiagnosticsEnabled() {
+  if (typeof window !== "undefined" && window) {
+    const runtimeFlag = window.__BITVID_VERBOSE_DEV_MODE__;
+    if (typeof runtimeFlag === "boolean") {
+      return runtimeFlag;
+    }
+  }
+  return Boolean(isVerboseDevMode);
+}
+
+function logCountWarning(message, args = [], { key, throttle = true } = {}) {
+  if (!isVerboseDiagnosticsEnabled()) {
+    return;
+  }
+
+  if (throttle && key) {
+    const normalizedKey = String(key);
+    if (seenWarningKeys.has(normalizedKey)) {
+      return;
+    }
+    seenWarningKeys.add(normalizedKey);
+  }
+
+  devLogger.warn(message, ...args);
+}
+
+export function logCountTimeoutCleanupFailure(error) {
+  logCountWarning("[nostr] COUNT timeout cleanup failed:", [error], {
+    key: "count-timeout-cleanup",
+  });
+}
+
+export function logRelayCountFailure(url, error) {
+  const normalizedUrl =
+    typeof url === "string" && url.trim() ? url.trim() : "(unknown relay)";
+  logCountWarning(`[nostr] COUNT request failed on ${normalizedUrl}:`, [error], {
+    key: `relay:${normalizedUrl}`,
+  });
+}
+
+export function logRebroadcastCountFailure(error) {
+  logCountWarning("[nostr] COUNT request for rebroadcast failed:", [error], {
+    key: "rebroadcast-count-failure",
+  });
+}
+
+export function logViewCountFailure(error) {
+  logCountWarning("[nostr] COUNT view request failed:", [error], {
+    key: "view-count-failure",
+  });
+}
+
+export function resetCountWarningHistory() {
+  seenWarningKeys.clear();
+}
diff --git a/js/nostr/maxListenerDiagnostics.js b/js/nostr/maxListenerDiagnostics.js
new file mode 100644
index 00000000..cc11d494
--- /dev/null
+++ b/js/nostr/maxListenerDiagnostics.js
@@ -0,0 +1,101 @@
+// js/nostr/maxListenerDiagnostics.js
+// Suppresses noisy MaxListenersExceededWarning diagnostics unless verbose
+// dev mode is enabled by shimming `process.emitWarning`. The EventEmitter
+// polyfill used by nostr-tools surfaces listener leaks through
+// `process.emitWarning`, so we intercept that hook instead of importing the
+// Node `events` module (which breaks browser bundlers) or rewriting
+// console.warn globally.
+
+import { isVerboseDiagnosticsEnabled } from "./countDiagnostics.js";
+
+const MAX_LISTENER_SNIPPETS = [
+  "MaxListenersExceededWarning",
+  "Possible EventEmitter memory leak detected",
+];
+
+const MAX_LISTENER_CODES = new Set(["MaxListenersExceededWarning"]);
+
+function collectCandidateStrings(value) {
+  const candidates = [];
+
+  if (!value) {
+    return candidates;
+  }
+
+  if (typeof value === "string") {
+    candidates.push(value);
+    return candidates;
+  }
+
+  if (typeof value === "object") {
+    const fields = ["name", "message", "code", "type"];
+    for (const field of fields) {
+      const fieldValue = value[field];
+      if (typeof fieldValue === "string") {
+        candidates.push(fieldValue);
+      }
+    }
+  }
+
+  return candidates;
+}
+
+function shouldSuppressWarning(...args) {
+  if (isVerboseDiagnosticsEnabled()) {
+    return false;
+  }
+
+  const candidates = [];
+  for (const arg of args) {
+    candidates.push(...collectCandidateStrings(arg));
+  }
+
+  for (const candidate of candidates) {
+    if (MAX_LISTENER_CODES.has(candidate)) {
+      return true;
+    }
+    if (MAX_LISTENER_SNIPPETS.some((snippet) => candidate.includes(snippet))) {
+      return true;
+    }
+  }
+
+  return false;
+}
+
+function patchProcessEmitWarning() {
+  const processRef =
+    typeof globalThis !== "undefined" && globalThis
+      ? globalThis.process
+      : typeof process !== "undefined"
+        ? process
+        : undefined;
+
+  if (!processRef || typeof processRef.emitWarning !== "function") {
+    return;
+  }
+
+  const originalEmitWarning = processRef.emitWarning.bind(processRef);
+
+  if (processRef.emitWarning.__BITVID_MAX_LISTENER_PATCHED__) {
+    return;
+  }
+
+  function patchedEmitWarning(warning, ...rest) {
+    if (shouldSuppressWarning(warning, ...rest)) {
+      return;
+    }
+
+    return originalEmitWarning(warning, ...rest);
+  }
+
+  patchedEmitWarning.__BITVID_MAX_LISTENER_PATCHED__ = true;
+  processRef.emitWarning = patchedEmitWarning;
+}
+
+patchProcessEmitWarning();
+
+export function refreshMaxListenerPreference() {
+  // The shim dynamically checks the verbose flag on each invocation, so there
+  // is nothing else to refresh right now. This placeholder remains for API
+  // parity if runtime toggling ever requires additional work.
+}
diff --git a/js/nostr/publishHelpers.js b/js/nostr/publishHelpers.js
index 077dde60..79936110 100644
--- a/js/nostr/publishHelpers.js
+++ b/js/nostr/publishHelpers.js
@@ -1,6 +1,4 @@
-import {
-  ENSURE_PRESENCE_REBROADCAST_COOLDOWN_SECONDS,
-} from "../config.js";
+import { ENSURE_PRESENCE_REBROADCAST_COOLDOWN_SECONDS } from "../config.js";
 import {
   publishEventToRelays,
   assertAnyRelayAccepted,
@@ -16,6 +14,7 @@ import {
 } from "./toolkit.js";
 import { DEFAULT_NIP07_PERMISSION_METHODS } from "./nip07Permissions.js";
 import { devLogger, userLogger } from "../utils/logger.js";
+import { logRebroadcastCountFailure } from "./countDiagnostics.js";
 
 const REBROADCAST_GUARD_PREFIX = "bitvid:rebroadcast:v1";
 const rebroadcastAttemptMemory = new Map();
@@ -1023,7 +1022,7 @@ export async function rebroadcastEvent({ client, eventId, options = {} }) {
             })
           : null;
     } catch (error) {
-      devLogger.warn("[nostr] COUNT request for rebroadcast failed:", error);
+      logRebroadcastCountFailure(error);
     }
 
     if (countResult?.total && Number(countResult.total) > 0) {
diff --git a/js/nostr/viewEvents.js b/js/nostr/viewEvents.js
index 723b93b0..1d3bf2c0 100644
--- a/js/nostr/viewEvents.js
+++ b/js/nostr/viewEvents.js
@@ -12,6 +12,7 @@ import { publishEventToRelay } from "../nostrPublish.js";
 import { RELAY_URLS } from "./toolkit.js";
 import { normalizePointerInput } from "./watchHistory.js";
 import { devLogger, userLogger } from "../utils/logger.js";
+import { logViewCountFailure } from "./countDiagnostics.js";
 
 const VIEW_EVENT_GUARD_PREFIX = "bitvid:viewed";
 
@@ -590,7 +591,7 @@ export async function countVideoViewEvents(client, pointer, options = {}) {
     }
   } catch (error) {
     if (error?.code !== "count-unsupported") {
-      devLogger.warn("[nostr] COUNT view request failed:", error);
+      logViewCountFailure(error);
     }
   }