diff --git a/docs/nostr-event-schemas.md b/docs/nostr-event-schemas.md
index 5b58df44..5a91a84a 100644
--- a/docs/nostr-event-schemas.md
+++ b/docs/nostr-event-schemas.md
@@ -16,6 +16,7 @@ import {
   setNostrEventSchemaOverrides,
   buildVideoPostEvent,
   buildRepostEvent,
+  buildShareEvent,
   buildProfileMetadataEvent,
 } from "./nostrEventSchemas.js";
 
@@ -147,6 +148,7 @@ import { updateWatchHistoryListWithDefaultClient } from "./nostrWatchHistoryFaca
 | Video post (`NOTE_TYPES.VIDEO_POST`) | `30078` | `['t','video']`, `['d', <stable video identifier>]` plus optional schema append tags | JSON payload using Content Schema v3 (`version`, `title`, optional `url`, `magnet`, `thumbnail`, `description`, `mode`, `videoRootId`, `deleted`, `isPrivate`, `isNsfw`, `isForKids`, `enableComments`, `ws`, `xs`) |
 | NIP-94 mirror (`NOTE_TYPES.VIDEO_MIRROR`) | `1063` | Tags forwarded from `publishVideo` (URL, mime type, thumbnail, alt text, magnet) | Plain text alt description |
 | Repost (`NOTE_TYPES.REPOST`) | `6` | `['e', <event id>, <relay?>]` with optional address pointer `['a', <kind:pubkey:identifier>, <relay?>]`, and `['p', <pubkey>]` when the origin author is known; inherits schema append tags | JSON-serialized event being reposted |
+| Share note (`NOTE_TYPES.SHARE`) | `1` | `['e', <video id>, '', 'mention']` plus `['p', <video pubkey>, '', 'mention']` when available; repeating `['r', <relay url>, <read/write?>]` tags for relay hints; inherits schema append tags | Plain text share content from the compose modal |
 | Video reaction (`NOTE_TYPES.VIDEO_REACTION`) | `7` | `['e', <event id>, <relay?>]` or `['a', <kind:pubkey:identifier>, <relay?>]`, and `['p', <author pubkey>]` | Reaction content (e.g. `+`, `-`, or emoji) |
 | Video comment (`NOTE_TYPES.VIDEO_COMMENT`) | `1111` | NIP-22 root scope tags `['A'\|`E`\|`I`, <pointer>, <relay?>?], `['K', <root kind>]`, and `['P', <root author pubkey>, <relay?>?]` plus parent metadata `['E'\|`I`, <parent pointer>, <relay?>?, <author?>], `['K', <parent kind>]`, `['P', <parent author>, <relay?>?]`; inherits schema append tags | Plain text body sanitized to valid UTF-8 |
 | DM attachment (`NOTE_TYPES.DM_ATTACHMENT`) | `15` | `['p', <recipient pubkey>]`, `['x', <sha256 of uploaded bytes>]`, `['url', <download url>]`, optional `['name', <filename>]`, `['type', <mime>]`, `['size', <bytes>]`, optional `['k', <base64 key>]`; inherits schema append tags | Empty content; attachment metadata is represented as tags |
diff --git a/js/app.js b/js/app.js
index 20f66792..58125cb4 100644
--- a/js/app.js
+++ b/js/app.js
@@ -72,7 +72,7 @@ import createPopover from "./ui/overlay/popoverEngine.js";
 import { createVideoSettingsMenuPanel } from "./ui/components/videoMenuRenderers.js";
 import moderationService from "./services/moderationService.js";
 import { sanitizeRelayList } from "./nostr/nip46Client.js";
-import { buildDmRelayListEvent } from "./nostrEventSchemas.js";
+import { buildDmRelayListEvent, buildShareEvent } from "./nostrEventSchemas.js";
 import {
   publishEventToRelays,
   assertAnyRelayAccepted,
@@ -81,6 +81,8 @@ import {
   getActiveSigner,
   onActiveSignerChanged,
 } from "./nostrClientRegistry.js";
+import { queueSignEvent } from "./nostr/signRequestQueue.js";
+import { DEFAULT_NIP07_PERMISSION_METHODS } from "./nostr/nip07Permissions.js";
 import {
   initViewCounter,
   subscribeToVideoViewCount,
@@ -10208,6 +10210,168 @@ class Application {
     this.videoListPopularTags = null;
   }
 
+  async handleShareNostrPost(payload = {}) {
+    const video = payload?.video || null;
+    const videoId = typeof video?.id === "string" ? video.id.trim() : "";
+    const videoTitle =
+      typeof video?.title === "string" ? video.title.trim() : "";
+    const videoPubkey =
+      typeof video?.pubkey === "string" ? video.pubkey.trim() : "";
+
+    if (!videoId || !videoTitle) {
+      userLogger.warn("[Application] Share post missing video details.");
+      this.showError("Missing video details for sharing.");
+      throw new Error("share-missing-video-details");
+    }
+
+    const signer = getActiveSigner();
+    if (!signer || typeof signer.signEvent !== "function") {
+      userLogger.warn("[Application] No active signer available for share.");
+      this.showError("Connect a Nostr signer to share.");
+      throw new Error("share-missing-signer");
+    }
+
+    const activePubkey = this.normalizeHexPubkey(this.pubkey);
+    const signerPubkey = this.normalizeHexPubkey(signer.pubkey);
+    const eventPubkey = activePubkey || signerPubkey;
+
+    if (!eventPubkey) {
+      userLogger.warn("[Application] Share post missing active pubkey.");
+      this.showError("Please log in to share on Nostr.");
+      throw new Error("share-missing-pubkey");
+    }
+
+    if (activePubkey && signerPubkey && activePubkey !== signerPubkey) {
+      userLogger.error(
+        "[Application] Active signer does not match current account for share.",
+      );
+      this.showError("Active signer does not match your account.");
+      throw new Error("share-signer-mismatch");
+    }
+
+    if (!nostrClient?.pool) {
+      userLogger.error("[Application] Share publish failed: relays not ready.");
+      this.showError("Nostr relays are not ready yet. Please try again.");
+      throw new Error("share-relays-unavailable");
+    }
+
+    const relayEntries = Array.isArray(payload?.relays) ? payload.relays : [];
+    const relayUrls = relayEntries
+      .map((entry) => {
+        if (typeof entry === "string") {
+          return entry;
+        }
+        if (Array.isArray(entry) && entry.length) {
+          if (entry[0] === "r") {
+            return typeof entry[1] === "string" ? entry[1] : "";
+          }
+          return typeof entry[0] === "string" ? entry[0] : "";
+        }
+        if (entry && typeof entry === "object") {
+          if (typeof entry.url === "string") {
+            return entry.url;
+          }
+          if (typeof entry.relay === "string") {
+            return entry.relay;
+          }
+        }
+        return "";
+      })
+      .filter(Boolean);
+    const relayTargets = sanitizeRelayList(relayUrls);
+
+    if (!relayTargets.length) {
+      userLogger.warn("[Application] Share post missing relay targets.");
+      this.showError("Please choose at least one relay to share to.");
+      throw new Error("share-missing-relays");
+    }
+
+    if (signer.type === "extension" && nostrClient.ensureExtensionPermissions) {
+      const permissionResult = await nostrClient.ensureExtensionPermissions(
+        DEFAULT_NIP07_PERMISSION_METHODS,
+      );
+      if (!permissionResult?.ok) {
+        userLogger.warn(
+          "[Application] Share publish blocked by signer permissions.",
+          permissionResult?.error,
+        );
+        this.showError("Signer permissions are required to post.");
+        throw new Error("share-permission-denied");
+      }
+    }
+
+    const event = buildShareEvent({
+      pubkey: eventPubkey,
+      created_at: Math.floor(Date.now() / 1000),
+      content: typeof payload?.content === "string" ? payload.content : "",
+      video: { id: videoId, pubkey: videoPubkey },
+      relays: relayEntries,
+    });
+
+    let signedEvent;
+    try {
+      signedEvent = await queueSignEvent(signer, event);
+    } catch (error) {
+      userLogger.error("[Application] Failed to sign share event.", error);
+      this.showError("Unable to sign the share event.");
+      throw error;
+    }
+
+    const publishResults = await publishEventToRelays(
+      nostrClient.pool,
+      relayTargets,
+      signedEvent,
+    );
+
+    let publishSummary;
+    try {
+      publishSummary = assertAnyRelayAccepted(publishResults, {
+        context: "share note",
+      });
+    } catch (publishError) {
+      if (publishError?.relayFailures?.length) {
+        publishError.relayFailures.forEach(
+          ({ url, error: relayError, reason }) => {
+            userLogger.error(
+              `[Application] Relay ${url} rejected share note: ${reason}`,
+              relayError || reason,
+            );
+          },
+        );
+      }
+      this.showError("Failed to share on Nostr. Please try again.");
+      throw publishError;
+    }
+
+    if (publishSummary.failed.length) {
+      publishSummary.failed.forEach(({ url, error: relayError }) => {
+        const reason =
+          relayError instanceof Error
+            ? relayError.message
+            : relayError
+            ? String(relayError)
+            : "publish failed";
+        userLogger.warn(
+          `[Application] Relay ${url} did not accept share note: ${reason}`,
+          relayError,
+        );
+      });
+    }
+
+    userLogger.info(
+      "[Application] Share note published.",
+      publishSummary.accepted.map(({ url }) => url),
+    );
+    this.showSuccess("Shared to Nostr!");
+
+    return {
+      ok: true,
+      event: signedEvent,
+      accepted: publishSummary.accepted.map(({ url }) => url),
+      failed: publishSummary.failed.map(({ url }) => url),
+    };
+  }
+
   shareActiveVideo() {
     if (!this.currentVideo || !this.currentVideo.id) {
       this.showError("No shareable video is loaded.");
diff --git a/js/nostrEventSchemas.js b/js/nostrEventSchemas.js
index a3a48d1d..7ec1ee5c 100644
--- a/js/nostrEventSchemas.js
+++ b/js/nostrEventSchemas.js
@@ -16,6 +16,7 @@ export const NOTE_TYPES = Object.freeze({
   NIP71_VIDEO: "nip71Video",
   NIP71_SHORT_VIDEO: "nip71ShortVideo",
   REPOST: "repost",
+  SHARE: "share",
   RELAY_LIST: "relayList",
   VIEW_EVENT: "viewEvent",
   VIDEO_REACTION: "videoReaction",
@@ -283,6 +284,19 @@ const BASE_SCHEMAS = {
       description: "Content field contains the JSON-serialized event being reposted.",
     },
   },
+  [NOTE_TYPES.SHARE]: {
+    type: NOTE_TYPES.SHARE,
+    label: "Share note",
+    kind: 1,
+    relayTagName: "r",
+    readMarker: "read",
+    writeMarker: "write",
+    appendTags: DEFAULT_APPEND_TAGS,
+    content: {
+      format: "text",
+      description: "Plaintext share note referencing a video.",
+    },
+  },
   [NOTE_TYPES.NIP71_VIDEO]: {
     type: NOTE_TYPES.NIP71_VIDEO,
     label: "NIP-71 video (normal)",
@@ -981,6 +995,115 @@ export function buildRepostEvent(params) {
   };
 }
 
+export function buildShareEvent(params) {
+  const {
+    pubkey,
+    created_at,
+    content = "",
+    video = null,
+    relays = [],
+    additionalTags = [],
+  } = params || {};
+  const schema = getNostrEventSchema(NOTE_TYPES.SHARE);
+  const tags = [];
+  const relayTagName = schema?.relayTagName || "r";
+  const readMarker = schema?.readMarker || "read";
+  const writeMarker = schema?.writeMarker || "write";
+
+  const normalizedVideoId =
+    typeof video?.id === "string" ? video.id.trim() : "";
+  if (normalizedVideoId) {
+    tags.push(["e", normalizedVideoId, "", "mention"]);
+  }
+
+  const normalizedVideoPubkey =
+    typeof video?.pubkey === "string" ? video.pubkey.trim() : "";
+  if (normalizedVideoPubkey) {
+    tags.push(["p", normalizedVideoPubkey, "", "mention"]);
+  }
+
+  const seenRelayTags = new Set();
+
+  const pushRelayTag = (url, marker) => {
+    const normalizedUrl = typeof url === "string" ? url.trim() : "";
+    if (!normalizedUrl) {
+      return;
+    }
+    const normalizedMarker =
+      typeof marker === "string" ? marker.trim().toLowerCase() : "";
+    const resolvedMarker =
+      normalizedMarker === "read" || normalizedMarker === "write"
+        ? normalizedMarker
+        : "";
+    const dedupeKey = `${normalizedUrl}|${resolvedMarker}`;
+    if (seenRelayTags.has(dedupeKey)) {
+      return;
+    }
+    seenRelayTags.add(dedupeKey);
+    if (resolvedMarker) {
+      const markerValue = resolvedMarker === "read" ? readMarker : writeMarker;
+      tags.push([relayTagName, normalizedUrl, markerValue]);
+    } else {
+      tags.push([relayTagName, normalizedUrl]);
+    }
+  };
+
+  if (Array.isArray(relays)) {
+    relays.forEach((entry) => {
+      if (typeof entry === "string") {
+        pushRelayTag(entry, "");
+        return;
+      }
+
+      if (Array.isArray(entry) && entry.length) {
+        if (entry[0] === relayTagName) {
+          pushRelayTag(entry[1], entry[2]);
+          return;
+        }
+        pushRelayTag(entry[0], entry[1]);
+        return;
+      }
+
+      if (entry && typeof entry === "object") {
+        const url =
+          typeof entry.url === "string"
+            ? entry.url
+            : typeof entry.relay === "string"
+            ? entry.relay
+            : "";
+        let marker = "";
+        if (typeof entry.mode === "string") {
+          marker = entry.mode;
+        } else if (typeof entry.marker === "string") {
+          marker = entry.marker;
+        } else if (entry.read === true && entry.write === false) {
+          marker = "read";
+        } else if (entry.write === true && entry.read === false) {
+          marker = "write";
+        }
+        pushRelayTag(url, marker);
+      }
+    });
+  }
+
+  appendSchemaTags(tags, schema);
+
+  const sanitizedAdditionalTags = sanitizeAdditionalTags(additionalTags);
+  if (sanitizedAdditionalTags.length) {
+    tags.push(...sanitizedAdditionalTags.map((tag) => tag.slice()));
+  }
+
+  const resolvedContent = ensureValidUtf8Content(content);
+
+  return {
+    kind: schema?.kind ?? 1,
+    pubkey,
+    created_at,
+    tags,
+    content: resolvedContent,
+  };
+}
+
 export function buildRelayListEvent(params) {
   const {
     pubkey,
diff --git a/js/ui/ModalManager.js b/js/ui/ModalManager.js
index 4f99fabe..434db4f1 100644
--- a/js/ui/ModalManager.js
+++ b/js/ui/ModalManager.js
@@ -177,6 +177,7 @@ export default class ModalManager {
       setGlobalModalState,
       container: modalContainer,
       fallbackThumbnailSrc: this.assets.fallbackThumbnailSrc,
+      onPost: (payload) => app.handleShareNostrPost(payload),
     });
     app.shareNostrModal = this.shareNostrModal;