diff --git a/docs/nostr-event-schemas.md b/docs/nostr-event-schemas.md
index 7a6cd54a..8451aaeb 100644
--- a/docs/nostr-event-schemas.md
+++ b/docs/nostr-event-schemas.md
@@ -311,3 +311,27 @@ device, etc.) should remain on-device via the
 Refer to the [`WatchHistoryService`](../js/watchHistoryService.js) for queue
 management hooks and metadata toggle controls that complement these schema
 definitions.【F:js/watchHistoryService.js†L695-L776】【F:js/watchHistoryService.js†L1040-L1093】
+
+## Validation
+
+bitvid now enforces schema validation at runtime during development. Every event
+builder automatically runs the generated event against its definition in
+`validateEventAgainstSchema` when `isDevMode` is true. Violations (missing
+required tags, invalid JSON content, etc.) are logged to the console via
+`devLogger`.
+
+### Continuous Integration
+
+A standalone validation suite runs in CI to ensure that all builders produce
+valid events:
+
+```bash
+# Run the validation script
+node scripts/agent/validate-events.mjs
+
+# Run the unit test suite
+npm run test:unit
+```
+
+When modifying schemas or builders, use `scripts/agent/validate-events.mjs` to
+verify your changes locally.
diff --git a/js/nostrEventSchemas.js b/js/nostrEventSchemas.js
index 3b582e86..7d751998 100644
--- a/js/nostrEventSchemas.js
+++ b/js/nostrEventSchemas.js
@@ -870,13 +870,19 @@ export function buildVideoMirrorEvent(params) {
       }
     });
   }
-  return {
+  const event = {
     kind: schema?.kind ?? 1063,
     pubkey,
     created_at,
     tags: combinedTags,
     content: typeof content === "string" ? content : String(content ?? ""),
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.VIDEO_MIRROR, event);
+  }
+
+  return event;
 }
 
 export function buildRepostEvent(params) {
@@ -986,13 +992,19 @@ export function buildRepostEvent(params) {
     }
   }
 
-  return {
+  const event = {
     kind: resolvedKind,
     pubkey,
     created_at,
     tags,
     content,
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.REPOST, event);
+  }
+
+  return event;
 }
 
 export function buildShareEvent(params) {
@@ -1093,13 +1105,19 @@ export function buildShareEvent(params) {
 
   const resolvedContent = ensureValidUtf8Content(content);
 
-  return {
+  const event = {
     kind: schema?.kind ?? 1,
     pubkey,
     created_at,
     tags,
     content: resolvedContent,
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.SHARE, event);
+  }
+
+  return event;
 }
 
 export function buildRelayListEvent(params) {
@@ -1164,13 +1182,19 @@ export function buildRelayListEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 10002,
     pubkey,
     created_at,
     tags,
     content: "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.RELAY_LIST, event);
+  }
+
+  return event;
 }
 
 export function buildDmRelayListEvent(params) {
@@ -1200,13 +1224,19 @@ export function buildDmRelayListEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 10050,
     pubkey,
     created_at,
     tags,
     content: "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.DM_RELAY_LIST, event);
+  }
+
+  return event;
 }
 
 export function buildProfileMetadataEvent(params) {
@@ -1236,13 +1266,19 @@ export function buildProfileMetadataEvent(params) {
     }
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 0,
     pubkey,
     created_at,
     tags,
     content: serializedContent,
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.PROFILE_METADATA, event);
+  }
+
+  return event;
 }
 
 export function buildMuteListEvent(params) {
@@ -1277,13 +1313,19 @@ export function buildMuteListEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 10000,
     pubkey,
     created_at,
     tags,
     content: typeof content === "string" ? content : "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.MUTE_LIST, event);
+  }
+
+  return event;
 }
 
 export function buildDeletionEvent(params) {
@@ -1322,13 +1364,19 @@ export function buildDeletionEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 5,
     pubkey,
     created_at,
     tags,
     content: typeof reason === "string" ? reason : "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.DELETION, event);
+  }
+
+  return event;
 }
 
 export function buildLegacyDirectMessageEvent(params) {
@@ -1353,13 +1401,19 @@ export function buildLegacyDirectMessageEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 4,
     pubkey,
     created_at,
     tags,
     content: typeof ciphertext === "string" ? ciphertext : "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.LEGACY_DM, event);
+  }
+
+  return event;
 }
 
 export function buildDmAttachmentEvent(params) {
@@ -1403,13 +1457,19 @@ export function buildDmAttachmentEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 15,
     pubkey,
     created_at,
     tags,
     content: "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.DM_ATTACHMENT, event);
+  }
+
+  return event;
 }
 
 export function buildDmReadReceiptEvent(params) {
@@ -1444,13 +1504,19 @@ export function buildDmReadReceiptEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 20001,
     pubkey,
     created_at,
     tags,
     content: "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.DM_READ_RECEIPT, event);
+  }
+
+  return event;
 }
 
 export function buildDmTypingIndicatorEvent(params) {
@@ -1489,13 +1555,19 @@ export function buildDmTypingIndicatorEvent(params) {
     tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
   }
 
-  return {
+  const event = {
     kind: schema?.kind ?? 20002,
     pubkey,
     created_at,
     tags,
     content: "",
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.DM_TYPING, event);
+  }
+
+  return event;
 }
 
 export function buildViewEvent(params) {
@@ -1550,13 +1622,19 @@ export function buildViewEvent(params) {
 
   const resolvedContent = ensureValidUtf8Content(content);
 
-  return {
+  const event = {
     kind: schema?.kind ?? WATCH_HISTORY_KIND,
     pubkey,
     created_at,
     tags,
     content: resolvedContent,
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.VIEW_EVENT, event);
+  }
+
+  return event;
 }
 
 export function buildZapRequestEvent(params) {
@@ -1624,13 +1702,19 @@ export function buildZapRequestEvent(params) {
 
   const resolvedContent = ensureValidUtf8Content(content);
 
-  return {
+  const event = {
     kind: schema?.kind ?? 9734,
     pubkey,
     created_at,
     tags,
     content: resolvedContent,
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.ZAP_REQUEST, event);
+  }
+
+  return event;
 }
 
 export function buildReactionEvent(params) {
@@ -1756,13 +1840,19 @@ export function buildReactionEvent(params) {
 
   const resolvedContent = ensureValidUtf8Content(content);
 
-  return {
+  const event = {
     kind: schema?.kind ?? 7,
     pubkey,
     created_at,
     tags,
     content: resolvedContent,
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.VIDEO_REACTION, event);
+  }
+
+  return event;
 }
 
 export function buildCommentEvent(params) {
@@ -2001,13 +2091,19 @@ export function buildCommentEvent(params) {
 
   const resolvedContent = ensureValidUtf8Content(content);
 
-  return {
+  const event = {
     kind: schema?.kind ?? 1111,
     pubkey,
     created_at,
     tags,
     content: resolvedContent,
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.VIDEO_COMMENT, event);
+  }
+
+  return event;
 }
 
 export function buildWatchHistoryEvent(params) {
@@ -2043,13 +2139,19 @@ export function buildWatchHistoryEvent(params) {
 
   appendSchemaTags(tags, schema);
 
-  return {
+  const event = {
     kind: schema?.kind ?? WATCH_HISTORY_KIND,
     pubkey,
     created_at: Number.isFinite(created_at) ? created_at : Math.floor(Date.now() / 1000),
     tags,
     content: typeof content === "string" ? content : String(content ?? ""),
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.WATCH_HISTORY, event);
+  }
+
+  return event;
 }
 
 export function buildSubscriptionListEvent(params) {
@@ -2072,13 +2174,20 @@ export function buildSubscriptionListEvent(params) {
     tags.push(["encrypted", normalizedEncryption]);
   }
   appendSchemaTags(tags, schema);
-  return {
+
+  const event = {
     kind: schema?.kind ?? 30000,
     pubkey,
     created_at,
     tags,
     content: typeof content === "string" ? content : String(content ?? ""),
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.SUBSCRIPTION_LIST, event);
+  }
+
+  return event;
 }
 
 export function buildBlockListEvent(params) {
@@ -2101,13 +2210,20 @@ export function buildBlockListEvent(params) {
     tags.push(["encrypted", normalizedEncryption]);
   }
   appendSchemaTags(tags, schema);
-  return {
+
+  const event = {
     kind: schema?.kind ?? 10000,
     pubkey,
     created_at,
     tags,
     content: typeof content === "string" ? content : String(content ?? ""),
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.USER_BLOCK_LIST, event);
+  }
+
+  return event;
 }
 
 export function buildHashtagPreferenceEvent(params) {
@@ -2124,13 +2240,20 @@ export function buildHashtagPreferenceEvent(params) {
     tags.push([identifierName, identifierValue]);
   }
   appendSchemaTags(tags, schema);
-  return {
+
+  const event = {
     kind: schema?.kind ?? 30015,
     pubkey,
     created_at,
     tags,
     content: typeof content === "string" ? content : String(content ?? ""),
   };
+
+  if (isDevMode) {
+    validateEventAgainstSchema(NOTE_TYPES.HASHTAG_PREFERENCES, event);
+  }
+
+  return event;
 }
 
 function resolveAdminNoteType(listKey) {
@@ -2178,13 +2301,23 @@ export function buildAdminListEvent(listKey, params) {
     }
   });
   appendSchemaTags(tags, schema);
-  return {
+
+  const event = {
     kind: schema?.kind ?? 30000,
     pubkey,
     created_at,
     tags,
     content: "",
   };
+
+  if (isDevMode) {
+    const resolvedType = resolveAdminNoteType(listKey);
+    if (resolvedType) {
+      validateEventAgainstSchema(resolvedType, event);
+    }
+  }
+
+  return event;
 }
 
 function hasTag(tags, tagName, tagValue = null) {
diff --git a/scripts/agent/validate-events.mjs b/scripts/agent/validate-events.mjs
new file mode 100644
index 00000000..64d59296
--- /dev/null
+++ b/scripts/agent/validate-events.mjs
@@ -0,0 +1,240 @@
+import { strict as assert } from 'node:assert';
+
+// Hook console.warn to capture validation warnings
+const originalWarn = console.warn;
+const warnings = [];
+console.warn = (...args) => {
+  // Capture only [schema] or [nostrEventSchemas] warnings
+  const msg = args.join(' ');
+  if (msg.includes('[schema]') || msg.includes('[nostrEventSchemas]')) {
+    warnings.push(msg);
+  }
+  // We can still print to stdout if needed, but for validation we want to capture
+  // originalWarn.apply(console, args);
+};
+
+// Import schemas AFTER hooking console
+const schemas = await import('../../js/nostrEventSchemas.js');
+const {
+  validateEventAgainstSchema,
+  NOTE_TYPES,
+  buildVideoPostEvent,
+  buildVideoMirrorEvent,
+  buildRepostEvent,
+  buildShareEvent,
+  buildRelayListEvent,
+  buildDmRelayListEvent,
+  buildProfileMetadataEvent,
+  buildMuteListEvent,
+  buildDeletionEvent,
+  buildLegacyDirectMessageEvent,
+  buildDmAttachmentEvent,
+  buildDmReadReceiptEvent,
+  buildDmTypingIndicatorEvent,
+  buildViewEvent,
+  buildZapRequestEvent,
+  buildReactionEvent,
+  buildCommentEvent,
+  buildWatchHistoryEvent,
+  buildSubscriptionListEvent,
+  buildBlockListEvent,
+  buildHashtagPreferenceEvent,
+  buildAdminListEvent
+} = schemas;
+
+console.log("Running Event Schema Validator...");
+
+const failures = [];
+
+function check(name, builder, params, expectedType) {
+  warnings.length = 0; // Clear warnings
+  try {
+    const event = builder(params);
+    validateEventAgainstSchema(expectedType || event.kind, event); // Pass type if known, else relies on implementation or event.kind mapping
+
+    // Some builders might not set the type explicitly in validate calls if we don't instrument them yet.
+    // So we manually call validateEventAgainstSchema with the expected NOTE_TYPE.
+    if (expectedType) {
+        validateEventAgainstSchema(expectedType, event);
+    }
+
+    if (warnings.length > 0) {
+      failures.push({ name, error: `Generated warnings: ${JSON.stringify(warnings)}` });
+    }
+
+    // specific checks can go here
+    if (!event.created_at) failures.push({ name, error: "Missing created_at" });
+    if (!event.pubkey) failures.push({ name, error: "Missing pubkey" });
+
+  } catch (e) {
+    failures.push({ name, error: `Threw exception: ${e.message}` });
+  }
+}
+
+const pubkey = "0000000000000000000000000000000000000000000000000000000000000001";
+const created_at = Math.floor(Date.now() / 1000);
+
+// Test cases
+check("buildVideoPostEvent", buildVideoPostEvent, {
+  pubkey,
+  created_at,
+  dTagValue: "video-123",
+  content: {
+    version: 3,
+    title: "Test Video",
+    videoRootId: "root-123",
+    url: "https://example.com/video.mp4"
+  }
+}, NOTE_TYPES.VIDEO_POST);
+
+check("buildVideoMirrorEvent", buildVideoMirrorEvent, {
+  pubkey,
+  created_at,
+  tags: [["t", "test"]],
+  content: "Mirror description"
+}, NOTE_TYPES.VIDEO_MIRROR);
+
+check("buildRepostEvent", buildRepostEvent, {
+  pubkey,
+  created_at,
+  eventId: "1111111111111111111111111111111111111111111111111111111111111111",
+  eventRelay: "wss://relay.example.com",
+  serializedEvent: JSON.stringify({ id: "111", kind: 1 })
+}, NOTE_TYPES.REPOST);
+
+check("buildShareEvent", buildShareEvent, {
+  pubkey,
+  created_at,
+  content: "Check this out",
+  video: { id: "2222222222222222222222222222222222222222222222222222222222222222" }
+}, NOTE_TYPES.SHARE);
+
+check("buildRelayListEvent", buildRelayListEvent, {
+  pubkey,
+  created_at,
+  relays: ["wss://relay.example.com", { url: "wss://read.example.com", mode: "read" }]
+}, NOTE_TYPES.RELAY_LIST);
+
+check("buildDmRelayListEvent", buildDmRelayListEvent, {
+  pubkey,
+  created_at,
+  relays: ["wss://dm.example.com"]
+}, NOTE_TYPES.DM_RELAY_LIST);
+
+check("buildProfileMetadataEvent", buildProfileMetadataEvent, {
+  pubkey,
+  created_at,
+  metadata: { name: "Test User", about: "Testing" }
+}, NOTE_TYPES.PROFILE_METADATA);
+
+check("buildMuteListEvent", buildMuteListEvent, {
+  pubkey,
+  created_at,
+  pTags: ["3333333333333333333333333333333333333333333333333333333333333333"]
+}, NOTE_TYPES.MUTE_LIST);
+
+check("buildDeletionEvent", buildDeletionEvent, {
+  pubkey,
+  created_at,
+  eventIds: ["4444444444444444444444444444444444444444444444444444444444444444"],
+  reason: "Mistake"
+}, NOTE_TYPES.DELETION);
+
+check("buildLegacyDirectMessageEvent", buildLegacyDirectMessageEvent, {
+  pubkey,
+  created_at,
+  recipientPubkey: "5555555555555555555555555555555555555555555555555555555555555555",
+  ciphertext: "encryped_content"
+}, NOTE_TYPES.LEGACY_DM);
+
+check("buildDmAttachmentEvent", buildDmAttachmentEvent, {
+  pubkey,
+  created_at,
+  recipientPubkey: "6666666666666666666666666666666666666666666666666666666666666666",
+  attachment: { url: "https://example.com/file.jpg", x: "hash" }
+}, NOTE_TYPES.DM_ATTACHMENT);
+
+check("buildDmReadReceiptEvent", buildDmReadReceiptEvent, {
+  pubkey,
+  created_at,
+  recipientPubkey: "7777777777777777777777777777777777777777777777777777777777777777",
+  eventId: "8888888888888888888888888888888888888888888888888888888888888888"
+}, NOTE_TYPES.DM_READ_RECEIPT);
+
+check("buildDmTypingIndicatorEvent", buildDmTypingIndicatorEvent, {
+  pubkey,
+  created_at,
+  recipientPubkey: "9999999999999999999999999999999999999999999999999999999999999999"
+}, NOTE_TYPES.DM_TYPING);
+
+check("buildViewEvent", buildViewEvent, {
+  pubkey,
+  created_at,
+  pointerValue: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+  pointerTag: ["e", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"],
+  dedupeTag: "session-123"
+}, NOTE_TYPES.VIEW_EVENT);
+
+check("buildZapRequestEvent", buildZapRequestEvent, {
+  pubkey,
+  created_at,
+  recipientPubkey: "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
+  amountSats: 100,
+  relays: ["wss://zap.relay.com"]
+}, NOTE_TYPES.ZAP_REQUEST);
+
+check("buildReactionEvent", buildReactionEvent, {
+  pubkey,
+  created_at,
+  pointerTag: ["e", "cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc"],
+  content: "+"
+}, NOTE_TYPES.VIDEO_REACTION);
+
+check("buildCommentEvent", buildCommentEvent, {
+  pubkey,
+  created_at,
+  videoEventId: "dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd",
+  content: "Nice video!"
+}, NOTE_TYPES.VIDEO_COMMENT);
+
+check("buildWatchHistoryEvent", buildWatchHistoryEvent, {
+  pubkey,
+  created_at,
+  monthIdentifier: "2023-10",
+  content: JSON.stringify({ version: 2, month: "2023-10", items: [] })
+}, NOTE_TYPES.WATCH_HISTORY);
+
+check("buildSubscriptionListEvent", buildSubscriptionListEvent, {
+  pubkey,
+  created_at,
+  content: "encrypted_subs"
+}, NOTE_TYPES.SUBSCRIPTION_LIST);
+
+check("buildBlockListEvent", buildBlockListEvent, {
+  pubkey,
+  created_at,
+  content: "encrypted_blocks"
+}, NOTE_TYPES.USER_BLOCK_LIST);
+
+check("buildHashtagPreferenceEvent", buildHashtagPreferenceEvent, {
+  pubkey,
+  created_at,
+  content: "encrypted_prefs"
+}, NOTE_TYPES.HASHTAG_PREFERENCES);
+
+check("buildAdminListEvent (moderation)", (p) => buildAdminListEvent("moderation", p), {
+  pubkey,
+  created_at,
+  hexPubkeys: ["eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"]
+}, NOTE_TYPES.ADMIN_MODERATION_LIST);
+
+if (failures.length > 0) {
+  console.error("\n❌ Validation Failed:");
+  failures.forEach(f => {
+    console.error(`- ${f.name}: ${f.error}`);
+  });
+  process.exit(1);
+} else {
+  console.log("\n✅ All events validated successfully.");
+  process.exit(0);
+}
diff --git a/tests/event-schemas.test.mjs b/tests/event-schemas.test.mjs
new file mode 100644
index 00000000..1f04a148
--- /dev/null
+++ b/tests/event-schemas.test.mjs
@@ -0,0 +1,225 @@
+import { describe, it, before, after } from 'node:test';
+import assert from 'node:assert/strict';
+import {
+  validateEventAgainstSchema,
+  NOTE_TYPES,
+  buildVideoPostEvent,
+  buildVideoMirrorEvent,
+  buildRepostEvent,
+  buildShareEvent,
+  buildRelayListEvent,
+  buildDmRelayListEvent,
+  buildProfileMetadataEvent,
+  buildMuteListEvent,
+  buildDeletionEvent,
+  buildLegacyDirectMessageEvent,
+  buildDmAttachmentEvent,
+  buildDmReadReceiptEvent,
+  buildDmTypingIndicatorEvent,
+  buildViewEvent,
+  buildZapRequestEvent,
+  buildReactionEvent,
+  buildCommentEvent,
+  buildWatchHistoryEvent,
+  buildSubscriptionListEvent,
+  buildBlockListEvent,
+  buildHashtagPreferenceEvent,
+  buildAdminListEvent
+} from '../js/nostrEventSchemas.js';
+
+describe('Nostr Event Schemas', () => {
+  const pubkey = "0000000000000000000000000000000000000000000000000000000000000001";
+  const created_at = Math.floor(Date.now() / 1000);
+  let originalWarn;
+  let warnings = [];
+
+  before(() => {
+    originalWarn = console.warn;
+    console.warn = (...args) => {
+      const msg = args.join(' ');
+      if (msg.includes('[schema]') || msg.includes('[nostrEventSchemas]')) {
+        warnings.push(msg);
+      }
+      // originalWarn.apply(console, args);
+    };
+  });
+
+  after(() => {
+    console.warn = originalWarn;
+  });
+
+  function check(name, builder, params, expectedType) {
+    it(`should validate ${name}`, () => {
+      warnings.length = 0;
+      const event = builder(params);
+
+      // Since we instrumented the builders, they run validation internally if IS_DEV_MODE is true.
+      // We also run it explicitly here to be sure.
+      validateEventAgainstSchema(expectedType || event.kind, event);
+      if (expectedType) {
+        validateEventAgainstSchema(expectedType, event);
+      }
+
+      if (warnings.length > 0) {
+        assert.fail(`Validation warnings for ${name}: ${JSON.stringify(warnings)}`);
+      }
+
+      assert.ok(event.created_at, "Missing created_at");
+      assert.ok(event.pubkey, "Missing pubkey");
+      assert.ok(Array.isArray(event.tags), "Tags should be an array");
+    });
+  }
+
+  check("buildVideoPostEvent", buildVideoPostEvent, {
+    pubkey,
+    created_at,
+    dTagValue: "video-123",
+    content: {
+      version: 3,
+      title: "Test Video",
+      videoRootId: "root-123",
+      url: "https://example.com/video.mp4"
+    }
+  }, NOTE_TYPES.VIDEO_POST);
+
+  check("buildVideoMirrorEvent", buildVideoMirrorEvent, {
+    pubkey,
+    created_at,
+    tags: [["t", "test"]],
+    content: "Mirror description"
+  }, NOTE_TYPES.VIDEO_MIRROR);
+
+  check("buildRepostEvent", buildRepostEvent, {
+    pubkey,
+    created_at,
+    eventId: "1111111111111111111111111111111111111111111111111111111111111111",
+    eventRelay: "wss://relay.example.com",
+    serializedEvent: JSON.stringify({ id: "111", kind: 1 })
+  }, NOTE_TYPES.REPOST);
+
+  check("buildShareEvent", buildShareEvent, {
+    pubkey,
+    created_at,
+    content: "Check this out",
+    video: { id: "2222222222222222222222222222222222222222222222222222222222222222" }
+  }, NOTE_TYPES.SHARE);
+
+  check("buildRelayListEvent", buildRelayListEvent, {
+    pubkey,
+    created_at,
+    relays: ["wss://relay.example.com", { url: "wss://read.example.com", mode: "read" }]
+  }, NOTE_TYPES.RELAY_LIST);
+
+  check("buildDmRelayListEvent", buildDmRelayListEvent, {
+    pubkey,
+    created_at,
+    relays: ["wss://dm.example.com"]
+  }, NOTE_TYPES.DM_RELAY_LIST);
+
+  check("buildProfileMetadataEvent", buildProfileMetadataEvent, {
+    pubkey,
+    created_at,
+    metadata: { name: "Test User", about: "Testing" }
+  }, NOTE_TYPES.PROFILE_METADATA);
+
+  check("buildMuteListEvent", buildMuteListEvent, {
+    pubkey,
+    created_at,
+    pTags: ["3333333333333333333333333333333333333333333333333333333333333333"]
+  }, NOTE_TYPES.MUTE_LIST);
+
+  check("buildDeletionEvent", buildDeletionEvent, {
+    pubkey,
+    created_at,
+    eventIds: ["4444444444444444444444444444444444444444444444444444444444444444"],
+    reason: "Mistake"
+  }, NOTE_TYPES.DELETION);
+
+  check("buildLegacyDirectMessageEvent", buildLegacyDirectMessageEvent, {
+    pubkey,
+    created_at,
+    recipientPubkey: "5555555555555555555555555555555555555555555555555555555555555555",
+    ciphertext: "encryped_content"
+  }, NOTE_TYPES.LEGACY_DM);
+
+  check("buildDmAttachmentEvent", buildDmAttachmentEvent, {
+    pubkey,
+    created_at,
+    recipientPubkey: "6666666666666666666666666666666666666666666666666666666666666666",
+    attachment: { url: "https://example.com/file.jpg", x: "hash" }
+  }, NOTE_TYPES.DM_ATTACHMENT);
+
+  check("buildDmReadReceiptEvent", buildDmReadReceiptEvent, {
+    pubkey,
+    created_at,
+    recipientPubkey: "7777777777777777777777777777777777777777777777777777777777777777",
+    eventId: "8888888888888888888888888888888888888888888888888888888888888888"
+  }, NOTE_TYPES.DM_READ_RECEIPT);
+
+  check("buildDmTypingIndicatorEvent", buildDmTypingIndicatorEvent, {
+    pubkey,
+    created_at,
+    recipientPubkey: "9999999999999999999999999999999999999999999999999999999999999999"
+  }, NOTE_TYPES.DM_TYPING);
+
+  check("buildViewEvent", buildViewEvent, {
+    pubkey,
+    created_at,
+    pointerValue: "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+    pointerTag: ["e", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"],
+    dedupeTag: "session-123"
+  }, NOTE_TYPES.VIEW_EVENT);
+
+  check("buildZapRequestEvent", buildZapRequestEvent, {
+    pubkey,
+    created_at,
+    recipientPubkey: "bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb",
+    amountSats: 100,
+    relays: ["wss://zap.relay.com"]
+  }, NOTE_TYPES.ZAP_REQUEST);
+
+  check("buildReactionEvent", buildReactionEvent, {
+    pubkey,
+    created_at,
+    pointerTag: ["e", "cccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc"],
+    content: "+"
+  }, NOTE_TYPES.VIDEO_REACTION);
+
+  check("buildCommentEvent", buildCommentEvent, {
+    pubkey,
+    created_at,
+    videoEventId: "dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd",
+    content: "Nice video!"
+  }, NOTE_TYPES.VIDEO_COMMENT);
+
+  check("buildWatchHistoryEvent", buildWatchHistoryEvent, {
+    pubkey,
+    created_at,
+    monthIdentifier: "2023-10",
+    content: JSON.stringify({ version: 2, month: "2023-10", items: [] })
+  }, NOTE_TYPES.WATCH_HISTORY);
+
+  check("buildSubscriptionListEvent", buildSubscriptionListEvent, {
+    pubkey,
+    created_at,
+    content: "encrypted_subs"
+  }, NOTE_TYPES.SUBSCRIPTION_LIST);
+
+  check("buildBlockListEvent", buildBlockListEvent, {
+    pubkey,
+    created_at,
+    content: "encrypted_blocks"
+  }, NOTE_TYPES.USER_BLOCK_LIST);
+
+  check("buildHashtagPreferenceEvent", buildHashtagPreferenceEvent, {
+    pubkey,
+    created_at,
+    content: "encrypted_prefs"
+  }, NOTE_TYPES.HASHTAG_PREFERENCES);
+
+  check("buildAdminListEvent (moderation)", (p) => buildAdminListEvent("moderation", p), {
+    pubkey,
+    created_at,
+    hexPubkeys: ["eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee"]
+  }, NOTE_TYPES.ADMIN_MODERATION_LIST);
+});