diff --git a/context/CONTEXT_1739837127.md b/context/CONTEXT_1739837127.md
new file mode 100644
index 00000000..5e2bf165
--- /dev/null
+++ b/context/CONTEXT_1739837127.md
@@ -0,0 +1,28 @@
+# Decompose: js/ui/profileModalController.js
+
+## Selection
+Selected `js/ui/profileModalController.js` (6258 lines) because it is the largest grandfathered file not decomposed in the last 8 weeks.
+
+## Plan
+Extract two cohesive blocks related to DM functionality that are currently mixed into the main controller:
+
+1. **DM Relay UI Logic** (`ProfileDmRelayBinder.js`)
+   - `cacheDmRelayElements`
+   - `bindDmRelayControls`
+   - `refreshDmRelayPreferences`
+   - `handlePublishDmRelayPreferences`
+   - `updateDmPrivacyToggleForRecipient`
+   - `setPrivacyToggleState`
+   - `handleActiveDmIdentityChanged`
+
+2. **DM Attachment Logic** (`ProfileDmAttachmentBinder.js`)
+   - `renderAttachmentQueue`
+   - `uploadAttachmentQueue`
+   - `resolveLatestDirectMessageForRecipient`
+   - `maybePublishTypingIndicator`
+
+These functions heavily rely on `this.dmController` and `this.services`, suggesting they belong in dedicated helpers or the DM controller itself. Extracting them to binder modules allows preserving the `this` context via argument passing while reducing the main file size.
+
+## Stats
+- Original size: 6258 lines
+- Target reduction: > 200 lines
diff --git a/decisions/DECISIONS_1739837127.md b/decisions/DECISIONS_1739837127.md
new file mode 100644
index 00000000..bb779de0
--- /dev/null
+++ b/decisions/DECISIONS_1739837127.md
@@ -0,0 +1,13 @@
+# Decisions
+
+## Extraction Strategy
+- Extracted logic heavily depends on `this` (the controller instance).
+- To avoid modifying `ProfileDirectMessageController.js` (keeping changes confined to `ProfileModalController` decomposition), we will create "Binder" modules that export standalone functions accepting the controller instance.
+- This pattern mimics the "Mixin" or "Extension Method" pattern but with pure functions.
+
+## Naming
+- `ProfileDmRelayBinder.js`: Handles relay preferences and UI binding.
+- `ProfileDmAttachmentBinder.js`: Handles attachment queue rendering and uploading.
+
+## Dependencies
+- Binders will import necessary utilities (logger, helpers) but rely on the controller instance for state and services.
diff --git a/docs/agents/task-logs/daily/_completed.md b/docs/agents/task-logs/daily/_completed.md
index e00f5e43..218cb852 100644
--- a/docs/agents/task-logs/daily/_completed.md
+++ b/docs/agents/task-logs/daily/_completed.md
@@ -1,17 +1,23 @@
-# Content Audit Agent (Daily) - Completed
+# Decompose Agent (Daily) - Completed
 
-**Date:** 2026-02-17
-**Agent:** content-audit-agent
+**Date:** 2026-02-18
+**Agent:** decompose-agent
 **Status:** Success
 
 ## Summary
-Audited `/content/docs/guides/upload-content.md` and `/content/docs/community/community-guidelines.md` against the codebase.
+Decomposed `js/ui/profileModalController.js` by extracting cohesive blocks of logic into helper modules ("binders").
 
 ## Findings
-1.  **Accepted File Types**: `/content/docs/guides/upload-content.md` listed a subset of supported video extensions.
-    *   **Fix**: Updated the doc to match `js/services/s3UploadService.js` (added `.m4v`, `.avi`, `.ogv`, `.ogg`, `.mpd`, `.flv`, `.3gp`).
-2.  **Moderation Configuration**: `js/services/moderationService.js` was using hardcoded constants for blur/autoplay thresholds, ignoring the configuration file mentioned in `/content/docs/community/community-guidelines.md`.
-    *   **Fix**: Refactored `js/services/moderationService.js` to import `DEFAULT_BLUR_THRESHOLD` and `DEFAULT_AUTOPLAY_BLOCK_THRESHOLD` from `../config.js`.
+1.  **Selection**: `js/ui/profileModalController.js` (6258 lines) was the largest grandfathered file.
+2.  **Extraction**:
+    - Extracted DM Relay UI logic to `js/ui/profileModal/ProfileDmRelayBinder.js`.
+    - Extracted DM Attachment & Typing logic to `js/ui/profileModal/ProfileDmAttachmentBinder.js`.
+3.  **Result**:
+    - `js/ui/profileModalController.js` reduced to 5884 lines (reduction of 374 lines).
+    - Updated `scripts/check-file-size.mjs` baseline.
+    - All tests passed.
 
 ## Artifacts
-- (Internal artifacts cleaned up)
+- `context/CONTEXT_1739837127.md`
+- `todo/TODO_1739837127.md`
+- `decisions/DECISIONS_1739837127.md`
diff --git a/js/ui/profileModal/ProfileDmAttachmentBinder.js b/js/ui/profileModal/ProfileDmAttachmentBinder.js
new file mode 100644
index 00000000..e377750f
--- /dev/null
+++ b/js/ui/profileModal/ProfileDmAttachmentBinder.js
@@ -0,0 +1,243 @@
+import { formatAttachmentSize } from "../../attachments/attachmentUtils.js";
+import { uploadAttachment } from "../../services/attachmentService.js";
+import { buildPublicUrl, buildR2Key } from "../../r2.js";
+import { devLogger } from "../../utils/logger.js";
+
+const TYPING_INDICATOR_TTL_SECONDS = 15;
+const TYPING_INDICATOR_COOLDOWN_MS = 4000;
+
+export function renderAttachmentQueue(controller) {
+  const list = controller.dmController.profileMessageAttachmentList;
+  if (!(list instanceof HTMLElement)) {
+    return;
+  }
+
+  list.textContent = "";
+
+  if (!controller.dmController.dmAttachmentQueue.length) {
+    return;
+  }
+
+  controller.dmController.dmAttachmentQueue.forEach((entry) => {
+    const item = document.createElement("div");
+    item.className = "card flex flex-col gap-2 p-3";
+    item.dataset.attachmentId = entry.id;
+
+    const header = document.createElement("div");
+    header.className = "flex items-center justify-between gap-2";
+    const title = document.createElement("div");
+    title.className = "text-sm font-semibold text-text";
+    title.textContent = entry.name || "Attachment";
+    header.appendChild(title);
+
+    const removeButton = document.createElement("button");
+    removeButton.type = "button";
+    removeButton.className = "btn-ghost focus-ring inline-flex items-center";
+    removeButton.dataset.size = "sm";
+    removeButton.textContent = "Remove";
+    removeButton.addEventListener("click", () => {
+      controller.dmController.dmAttachmentQueue =
+        controller.dmController.dmAttachmentQueue.filter(
+          (queued) => queued.id !== entry.id,
+        );
+      if (entry.previewUrl && typeof URL !== "undefined") {
+        URL.revokeObjectURL(entry.previewUrl);
+      }
+      renderAttachmentQueue(controller);
+    });
+    header.appendChild(removeButton);
+    item.appendChild(header);
+
+    const meta = document.createElement("div");
+    meta.className = "text-xs text-muted";
+    const sizeLabel = formatAttachmentSize(entry.size);
+    meta.textContent = sizeLabel
+      ? `${entry.type || "file"} · ${sizeLabel}`
+      : entry.type || "file";
+    item.appendChild(meta);
+
+    if (entry.previewUrl && entry.type?.startsWith("image/")) {
+      const img = document.createElement("img");
+      img.src = entry.previewUrl;
+      img.alt = entry.name || "Attachment preview";
+      img.className = "h-24 w-24 rounded-lg object-cover";
+      img.loading = "lazy";
+      img.decoding = "async";
+      item.appendChild(img);
+    }
+
+    const progress = document.createElement("progress");
+    progress.className = "progress";
+    progress.value = entry.progress || 0;
+    progress.max = 1;
+    progress.dataset.variant = "surface";
+    item.appendChild(progress);
+
+    const status = document.createElement("div");
+    status.className = "text-xs text-muted";
+    status.textContent =
+      entry.status === "uploading"
+        ? "Uploading…"
+        : entry.status === "error"
+        ? entry.error || "Upload failed."
+        : "Ready to upload.";
+    item.appendChild(status);
+
+    list.appendChild(item);
+  });
+}
+
+export async function uploadAttachmentQueue(controller, actorPubkey) {
+  const r2Service = controller.services.r2Service;
+  if (!r2Service) {
+    throw new Error("Storage service unavailable.");
+  }
+
+  const encrypt =
+    controller.dmController.profileMessageAttachmentEncrypt instanceof
+    HTMLInputElement
+      ? controller.dmController.profileMessageAttachmentEncrypt.checked
+      : false;
+
+  const payloads = [];
+
+  for (const entry of controller.dmController.dmAttachmentQueue) {
+    entry.status = "uploading";
+    entry.progress = 0;
+    renderAttachmentQueue(controller);
+
+    try {
+      const payload = await uploadAttachment({
+        r2Service,
+        pubkey: actorPubkey,
+        file: entry.file,
+        encrypt,
+        buildKey: buildR2Key,
+        buildUrl: buildPublicUrl,
+        onProgress: (fraction) => {
+          entry.progress = Number.isFinite(fraction)
+            ? fraction
+            : entry.progress;
+          renderAttachmentQueue(controller);
+        },
+      });
+      payloads.push(payload);
+      entry.status = "uploaded";
+      entry.progress = 1;
+    } catch (error) {
+      entry.status = "error";
+      entry.error =
+        error && typeof error.message === "string"
+          ? error.message
+          : "Attachment upload failed.";
+      renderAttachmentQueue(controller);
+      throw error;
+    }
+  }
+
+  return payloads;
+}
+
+export function resolveLatestDirectMessageForRecipient(
+  controller,
+  recipientPubkey,
+  actorPubkey = null,
+) {
+  const normalizedRecipient =
+    typeof recipientPubkey === "string"
+      ? controller.normalizeHexPubkey(recipientPubkey)
+      : "";
+  if (
+    !normalizedRecipient ||
+    !Array.isArray(controller.dmController.directMessagesCache)
+  ) {
+    return null;
+  }
+
+  const resolvedActor = actorPubkey
+    ? controller.normalizeHexPubkey(actorPubkey)
+    : controller.dmController.resolveActiveDmActor();
+
+  let latest = null;
+  let latestTimestamp = 0;
+
+  for (const entry of controller.dmController.directMessagesCache) {
+    if (
+      controller.dmController.resolveDirectMessageRemote(
+        entry,
+        resolvedActor,
+      ) !== normalizedRecipient
+    ) {
+      continue;
+    }
+    const timestamp = Number(entry?.timestamp) || 0;
+    if (!latest || timestamp > latestTimestamp) {
+      latest = entry;
+      latestTimestamp = timestamp;
+    }
+  }
+
+  return latest;
+}
+
+export async function maybePublishTypingIndicator(controller) {
+  const settings = controller.dmController.getDmPrivacySettingsSnapshot();
+  if (!settings.typingIndicatorsEnabled) {
+    return;
+  }
+
+  if (
+    !controller.services.nostrClient ||
+    typeof controller.services.nostrClient.publishDmTypingIndicator !==
+      "function"
+  ) {
+    return;
+  }
+
+  const input = controller.dmController.profileMessageInput;
+  const messageText =
+    input instanceof HTMLTextAreaElement ? input.value.trim() : "";
+  if (!messageText) {
+    return;
+  }
+
+  const recipient = controller.dmController.resolveActiveDmRecipient();
+  if (!recipient) {
+    return;
+  }
+
+  const now = Date.now();
+  if (
+    now - controller.dmController.dmTypingLastSentAt <
+    TYPING_INDICATOR_COOLDOWN_MS
+  ) {
+    return;
+  }
+
+  controller.dmController.dmTypingLastSentAt = now;
+
+  const relayHints =
+    controller.dmController.buildDmRecipientContext(recipient)?.relayHints ||
+    [];
+  const latestMessage = resolveLatestDirectMessageForRecipient(
+    controller,
+    recipient,
+    controller.dmController.resolveActiveDmActor(),
+  );
+  const latestEventId =
+    controller.dmController.resolveDirectMessageEventId(latestMessage);
+
+  try {
+    await controller.services.nostrClient.publishDmTypingIndicator({
+      recipientPubkey: recipient,
+      conversationEventId: latestEventId || null,
+      relays: relayHints,
+      expiresInSeconds: TYPING_INDICATOR_TTL_SECONDS,
+    });
+  } catch (error) {
+    devLogger.warn(
+      "[profileModal] Failed to publish typing indicator:",
+      error,
+    );
+  }
+}
diff --git a/js/ui/profileModal/ProfileDmRelayBinder.js b/js/ui/profileModal/ProfileDmRelayBinder.js
new file mode 100644
index 00000000..77d08b60
--- /dev/null
+++ b/js/ui/profileModal/ProfileDmRelayBinder.js
@@ -0,0 +1,238 @@
+import { devLogger } from "../../utils/logger.js";
+
+const noop = () => {};
+
+export function cacheDmRelayElements(controller) {
+  controller.dmController.profileMessagesRelayList =
+    document.getElementById("profileMessagesRelayList") || null;
+  controller.dmController.profileMessagesRelayInput =
+    document.getElementById("profileMessagesRelayInput") || null;
+  controller.dmController.profileMessagesRelayAddButton =
+    document.getElementById("profileMessagesRelayAdd") || null;
+  controller.dmController.profileMessagesRelayPublishButton =
+    document.getElementById("profileMessagesRelayPublish") || null;
+  controller.dmController.profileMessagesRelayStatus =
+    document.getElementById("profileMessagesRelayStatus") || null;
+}
+
+export function bindDmRelayControls(controller) {
+  const bindOnce = (element, eventName, handler, key) => {
+    if (!(element instanceof HTMLElement)) {
+      return;
+    }
+    const datasetKey = key || "dmRelayBound";
+    if (element.dataset[datasetKey] === "true") {
+      return;
+    }
+    element.dataset[datasetKey] = "true";
+    element.addEventListener(eventName, handler);
+  };
+
+  bindOnce(
+    controller.dmController.profileMessagesRelayAddButton,
+    "click",
+    () => {
+      void controller.dmController.handleAddDmRelayPreference();
+    },
+    "dmRelayAddBound",
+  );
+
+  bindOnce(
+    controller.dmController.profileMessagesRelayInput,
+    "keydown",
+    (event) => {
+      if (event.key === "Enter") {
+        event.preventDefault();
+        void controller.dmController.handleAddDmRelayPreference();
+      }
+    },
+    "dmRelayInputBound",
+  );
+
+  bindOnce(
+    controller.dmController.profileMessagesRelayPublishButton,
+    "click",
+    () => {
+      void handlePublishDmRelayPreferences(controller);
+    },
+    "dmRelayPublishBound",
+  );
+}
+
+export async function refreshDmRelayPreferences(
+  controller,
+  { force = false } = {},
+) {
+  const owner = controller.dmController.resolveActiveDmRelayOwner();
+  if (!owner) {
+    controller.dmController.populateDmRelayPreferences();
+    return;
+  }
+
+  const existing = controller.dmController.getActiveDmRelayPreferences();
+  if (!existing.length || force) {
+    if (typeof controller.services.fetchDmRelayHints === "function") {
+      try {
+        const hints = await controller.services.fetchDmRelayHints(owner);
+        if (typeof controller.state.setDmRelayPreferences === "function") {
+          controller.state.setDmRelayPreferences(owner, hints);
+        }
+      } catch (error) {
+        devLogger.warn(
+          "[profileModal] Failed to refresh DM relay hints for profile:",
+          error,
+        );
+      }
+    }
+  }
+
+  controller.dmController.populateDmRelayPreferences();
+}
+
+export async function handlePublishDmRelayPreferences(controller) {
+  const owner = controller.dmController.resolveActiveDmRelayOwner();
+  if (!owner) {
+    controller.showError("Please sign in to publish DM relay hints.");
+    return;
+  }
+
+  const relays = controller.dmController.getActiveDmRelayPreferences();
+  if (!relays.length) {
+    controller.showError("Add at least one DM relay before publishing.");
+    return;
+  }
+
+  const callback = controller.callbacks.onPublishDmRelayPreferences;
+  if (!callback || callback === noop) {
+    controller.showError("DM relay publishing is unavailable right now.");
+    return;
+  }
+
+  controller.dmController.setDmRelayPreferencesStatus(
+    "Publishing DM relay hints…",
+  );
+
+  try {
+    const result = await callback({
+      pubkey: owner,
+      relays,
+      controller: controller,
+    });
+    if (result?.ok) {
+      const acceptedCount = Array.isArray(result.accepted)
+        ? result.accepted.length
+        : 0;
+      const summary = acceptedCount
+        ? `Published to ${acceptedCount} relay${acceptedCount === 1 ? "" : "s"}.`
+        : "DM relay hints published.";
+      controller.showSuccess("DM relay hints published.");
+      controller.dmController.setDmRelayPreferencesStatus(summary);
+      return;
+    }
+    controller.showError("Failed to publish DM relay hints.");
+    controller.dmController.setDmRelayPreferencesStatus(
+      "DM relay hints publish failed.",
+    );
+  } catch (error) {
+    const message =
+      error && typeof error.message === "string" && error.message.trim()
+        ? error.message.trim()
+        : "Failed to publish DM relay hints.";
+    controller.showError(message);
+    controller.dmController.setDmRelayPreferencesStatus(message);
+  }
+}
+
+export function updateDmPrivacyToggleForRecipient(
+  controller,
+  recipientContext,
+  { force = false } = {},
+) {
+  if (!recipientContext) {
+    return;
+  }
+
+  const relayHints = Array.isArray(recipientContext.relayHints)
+    ? recipientContext.relayHints
+    : [];
+  const hasHints = relayHints.length > 0;
+
+  if (!controller.dmController.dmPrivacyToggleTouched || force) {
+    setPrivacyToggleState(controller, hasHints);
+  }
+}
+
+export function setPrivacyToggleState(controller, enabled) {
+  if (
+    controller.dmController.profileMessagesPrivacyToggle instanceof
+    HTMLInputElement
+  ) {
+    controller.dmController.profileMessagesPrivacyToggle.checked = Boolean(enabled);
+  }
+  controller.dmController.updateMessagePrivacyModeDisplay();
+}
+
+export function handleActiveDmIdentityChanged(
+  controller,
+  actorPubkey = null,
+) {
+  const normalized = actorPubkey
+    ? controller.normalizeHexPubkey(actorPubkey)
+    : controller.dmController.resolveActiveDmActor();
+
+  controller.dmController.hasShownRelayWarning = false;
+  controller.dmController.setDirectMessageRecipient(null, { reason: "clear" });
+  controller.resetAttachmentQueue({ clearInput: true });
+  controller.dmController.dmReadReceiptCache.clear();
+  controller.dmController.dmTypingLastSentAt = 0;
+  controller.dmController.syncDmPrivacySettingsUi();
+
+  if (
+    controller.dmController.directMessagesSubscription &&
+    controller.dmController.directMessagesSubscription.actor &&
+    normalized !== controller.dmController.directMessagesSubscription.actor
+  ) {
+    controller.dmController.resetDirectMessageSubscription();
+  }
+
+  controller.dmController.directMessagesLastActor = normalized || null;
+  controller.dmController.directMessagesCache = [];
+  controller.dmController.messagesInitialLoadPending = true;
+  controller.dmController.pendingMessagesRender = null;
+
+  if (controller.dmController.profileMessagesList instanceof HTMLElement) {
+    controller.dmController.profileMessagesList.textContent = "";
+    controller.dmController.profileMessagesList.classList.add("hidden");
+    controller.dmController.profileMessagesList.setAttribute("hidden", "");
+  }
+  if (controller.dmController.profileMessagesConversation instanceof HTMLElement) {
+    controller.dmController.profileMessagesConversation.textContent = "";
+    controller.dmController.profileMessagesConversation.classList.add("hidden");
+    controller.dmController.profileMessagesConversation.setAttribute("hidden", "");
+  }
+  if (controller.dmController.profileMessagesConversationEmpty instanceof HTMLElement) {
+    controller.dmController.profileMessagesConversationEmpty.classList.remove("hidden");
+    controller.dmController.profileMessagesConversationEmpty.removeAttribute("hidden");
+  }
+
+  if (!normalized) {
+    controller.dmController.setMessagesLoadingState("unauthenticated");
+    controller.dmController.updateMessagesReloadState();
+    controller.dmController.populateDmRelayPreferences();
+    controller.dmController.setDmRelayPreferencesStatus("");
+    return;
+  }
+
+  controller.dmController.setMessagesLoadingState("loading");
+  void controller.dmController.ensureDirectMessageSubscription(normalized);
+  controller.dmController.updateMessagesReloadState();
+
+  if (controller.getActivePane() === "messages") {
+    void controller.dmController.populateProfileMessages({
+      force: true,
+      reason: "identity-change",
+    });
+  }
+
+  void refreshDmRelayPreferences(controller, { force: true });
+}
diff --git a/js/ui/profileModalController.js b/js/ui/profileModalController.js
index bc5368c8..a81c3e9d 100644
--- a/js/ui/profileModalController.js
+++ b/js/ui/profileModalController.js
@@ -50,6 +50,21 @@ import { ProfileRelayController } from "./profileModal/ProfileRelayController.js
 import { ProfileHashtagController } from "./profileModal/ProfileHashtagController.js";
 import { ProfileAdminController } from "./profileModal/ProfileAdminController.js";
 import { ProfileModerationController } from "./profileModal/ProfileModerationController.js";
+import {
+  cacheDmRelayElements,
+  bindDmRelayControls,
+  refreshDmRelayPreferences,
+  handlePublishDmRelayPreferences,
+  updateDmPrivacyToggleForRecipient,
+  setPrivacyToggleState,
+  handleActiveDmIdentityChanged,
+} from "./profileModal/ProfileDmRelayBinder.js";
+import {
+  renderAttachmentQueue,
+  uploadAttachmentQueue,
+  resolveLatestDirectMessageForRecipient,
+  maybePublishTypingIndicator,
+} from "./profileModal/ProfileDmAttachmentBinder.js";
 
 const noop = () => {};
 
@@ -62,8 +77,6 @@ const DEFAULT_MAX_WALLET_DEFAULT_ZAP = 100000000;
 const DEFAULT_SAVED_PROFILE_LABEL = "Saved profile";
 const TRUSTED_MUTE_HIDE_HELPER_TEXT =
   "Reaching this count hides cards (with “Show anyway”); lower signals only blur thumbnails or block autoplay.";
-const TYPING_INDICATOR_TTL_SECONDS = 15;
-const TYPING_INDICATOR_COOLDOWN_MS = 4000;
 const DIRECT_MESSAGES_BATCH_DELAY_MS = 250;
 
 const ADD_PROFILE_CANCELLATION_CODES = new Set([
@@ -1006,233 +1019,40 @@ export class ProfileModalController {
 
 
   cacheDmRelayElements() {
-    this.dmController.profileMessagesRelayList =
-      document.getElementById("profileMessagesRelayList") || null;
-    this.dmController.profileMessagesRelayInput =
-      document.getElementById("profileMessagesRelayInput") || null;
-    this.dmController.profileMessagesRelayAddButton =
-      document.getElementById("profileMessagesRelayAdd") || null;
-    this.dmController.profileMessagesRelayPublishButton =
-      document.getElementById("profileMessagesRelayPublish") || null;
-    this.dmController.profileMessagesRelayStatus =
-      document.getElementById("profileMessagesRelayStatus") || null;
+    cacheDmRelayElements(this);
   }
 
   bindDmRelayControls() {
-    const bindOnce = (element, eventName, handler, key) => {
-      if (!(element instanceof HTMLElement)) {
-        return;
-      }
-      const datasetKey = key || "dmRelayBound";
-      if (element.dataset[datasetKey] === "true") {
-        return;
-      }
-      element.dataset[datasetKey] = "true";
-      element.addEventListener(eventName, handler);
-    };
-
-    bindOnce(
-      this.dmController.profileMessagesRelayAddButton,
-      "click",
-      () => {
-        void this.dmController.handleAddDmRelayPreference();
-      },
-      "dmRelayAddBound",
-    );
-
-    bindOnce(
-      this.dmController.profileMessagesRelayInput,
-      "keydown",
-      (event) => {
-        if (event.key === "Enter") {
-          event.preventDefault();
-          void this.dmController.handleAddDmRelayPreference();
-        }
-      },
-      "dmRelayInputBound",
-    );
-
-    bindOnce(
-      this.dmController.profileMessagesRelayPublishButton,
-      "click",
-      () => {
-        void this.handlePublishDmRelayPreferences();
-      },
-      "dmRelayPublishBound",
-    );
+    bindDmRelayControls(this);
   }
 
-  async refreshDmRelayPreferences({ force = false } = {}) {
-    const owner = this.dmController.resolveActiveDmRelayOwner();
-    if (!owner) {
-      this.dmController.populateDmRelayPreferences();
-      return;
-    }
-
-    const existing = this.dmController.getActiveDmRelayPreferences();
-    if (!existing.length || force) {
-      if (typeof this.services.fetchDmRelayHints === "function") {
-        try {
-          const hints = await this.services.fetchDmRelayHints(owner);
-          if (typeof this.state.setDmRelayPreferences === "function") {
-            this.state.setDmRelayPreferences(owner, hints);
-          }
-        } catch (error) {
-          devLogger.warn(
-            "[profileModal] Failed to refresh DM relay hints for profile:",
-            error,
-          );
-        }
-      }
-    }
-
-    this.dmController.populateDmRelayPreferences();
+  async refreshDmRelayPreferences(options) {
+    return refreshDmRelayPreferences(this, options);
   }
 
 
 
 
   async handlePublishDmRelayPreferences() {
-    const owner = this.dmController.resolveActiveDmRelayOwner();
-    if (!owner) {
-      this.showError("Please sign in to publish DM relay hints.");
-      return;
-    }
-
-    const relays = this.dmController.getActiveDmRelayPreferences();
-    if (!relays.length) {
-      this.showError("Add at least one DM relay before publishing.");
-      return;
-    }
-
-    const callback = this.callbacks.onPublishDmRelayPreferences;
-    if (!callback || callback === noop) {
-      this.showError("DM relay publishing is unavailable right now.");
-      return;
-    }
-
-    this.dmController.setDmRelayPreferencesStatus("Publishing DM relay hints…");
-
-    try {
-      const result = await callback({
-        pubkey: owner,
-        relays,
-        controller: this,
-      });
-      if (result?.ok) {
-        const acceptedCount = Array.isArray(result.accepted)
-          ? result.accepted.length
-          : 0;
-        const summary = acceptedCount
-          ? `Published to ${acceptedCount} relay${acceptedCount === 1 ? "" : "s"}.`
-          : "DM relay hints published.";
-        this.showSuccess("DM relay hints published.");
-        this.dmController.setDmRelayPreferencesStatus(summary);
-        return;
-      }
-      this.showError("Failed to publish DM relay hints.");
-      this.dmController.setDmRelayPreferencesStatus("DM relay hints publish failed.");
-    } catch (error) {
-      const message =
-        error && typeof error.message === "string" && error.message.trim()
-          ? error.message.trim()
-          : "Failed to publish DM relay hints.";
-      this.showError(message);
-      this.dmController.setDmRelayPreferencesStatus(message);
-    }
+    return handlePublishDmRelayPreferences(this);
   }
 
 
 
 
 
-  updateDmPrivacyToggleForRecipient(recipientContext, { force = false } = {}) {
-    if (!recipientContext) {
-      return;
-    }
-
-    const relayHints = Array.isArray(recipientContext.relayHints)
-      ? recipientContext.relayHints
-      : [];
-    const hasHints = relayHints.length > 0;
-
-    if (!this.dmController.dmPrivacyToggleTouched || force) {
-      this.setPrivacyToggleState(hasHints);
-    }
+  updateDmPrivacyToggleForRecipient(recipientContext, options) {
+    updateDmPrivacyToggleForRecipient(this, recipientContext, options);
   }
 
-
-
-
   setPrivacyToggleState(enabled) {
-    if (this.dmController.profileMessagesPrivacyToggle instanceof HTMLInputElement) {
-      this.dmController.profileMessagesPrivacyToggle.checked = Boolean(enabled);
-    }
-    this.dmController.updateMessagePrivacyModeDisplay();
+    setPrivacyToggleState(this, enabled);
   }
 
 
 
-  handleActiveDmIdentityChanged(actorPubkey = null) {
-    const normalized = actorPubkey
-      ? this.normalizeHexPubkey(actorPubkey)
-      : this.dmController.resolveActiveDmActor();
-
-    this.dmController.hasShownRelayWarning = false;
-    this.dmController.setDirectMessageRecipient(null, { reason: "clear" });
-    this.resetAttachmentQueue({ clearInput: true });
-    this.dmController.dmReadReceiptCache.clear();
-    this.dmController.dmTypingLastSentAt = 0;
-    this.dmController.syncDmPrivacySettingsUi();
-
-    if (
-      this.dmController.directMessagesSubscription &&
-      this.dmController.directMessagesSubscription.actor &&
-      normalized !== this.dmController.directMessagesSubscription.actor
-    ) {
-      this.dmController.resetDirectMessageSubscription();
-    }
-
-    this.dmController.directMessagesLastActor = normalized || null;
-    this.dmController.directMessagesCache = [];
-    this.dmController.messagesInitialLoadPending = true;
-    this.dmController.pendingMessagesRender = null;
-
-    if (this.dmController.profileMessagesList instanceof HTMLElement) {
-      this.dmController.profileMessagesList.textContent = "";
-      this.dmController.profileMessagesList.classList.add("hidden");
-      this.dmController.profileMessagesList.setAttribute("hidden", "");
-    }
-    if (this.dmController.profileMessagesConversation instanceof HTMLElement) {
-      this.dmController.profileMessagesConversation.textContent = "";
-      this.dmController.profileMessagesConversation.classList.add("hidden");
-      this.dmController.profileMessagesConversation.setAttribute("hidden", "");
-    }
-    if (this.dmController.profileMessagesConversationEmpty instanceof HTMLElement) {
-      this.dmController.profileMessagesConversationEmpty.classList.remove("hidden");
-      this.dmController.profileMessagesConversationEmpty.removeAttribute("hidden");
-    }
-
-    if (!normalized) {
-      this.dmController.setMessagesLoadingState("unauthenticated");
-      this.dmController.updateMessagesReloadState();
-      this.dmController.populateDmRelayPreferences();
-      this.dmController.setDmRelayPreferencesStatus("");
-      return;
-    }
-
-    this.dmController.setMessagesLoadingState("loading");
-    void this.dmController.ensureDirectMessageSubscription(normalized);
-    this.dmController.updateMessagesReloadState();
-
-    if (this.getActivePane() === "messages") {
-      void this.dmController.populateProfileMessages({
-        force: true,
-        reason: "identity-change",
-      });
-    }
-
-    void this.refreshDmRelayPreferences({ force: true });
+  handleActiveDmIdentityChanged(actorPubkey) {
+    handleActiveDmIdentityChanged(this, actorPubkey);
   }
 
 
@@ -1290,216 +1110,23 @@ export class ProfileModalController {
 
 
   renderAttachmentQueue() {
-    const list = this.dmController.profileMessageAttachmentList;
-    if (!(list instanceof HTMLElement)) {
-      return;
-    }
-
-    list.textContent = "";
-
-    if (!this.dmController.dmAttachmentQueue.length) {
-      return;
-    }
-
-    this.dmController.dmAttachmentQueue.forEach((entry) => {
-      const item = document.createElement("div");
-      item.className = "card flex flex-col gap-2 p-3";
-      item.dataset.attachmentId = entry.id;
-
-      const header = document.createElement("div");
-      header.className = "flex items-center justify-between gap-2";
-      const title = document.createElement("div");
-      title.className = "text-sm font-semibold text-text";
-      title.textContent = entry.name || "Attachment";
-      header.appendChild(title);
-
-      const removeButton = document.createElement("button");
-      removeButton.type = "button";
-      removeButton.className = "btn-ghost focus-ring inline-flex items-center";
-      removeButton.dataset.size = "sm";
-      removeButton.textContent = "Remove";
-      removeButton.addEventListener("click", () => {
-        this.dmController.dmAttachmentQueue = this.dmController.dmAttachmentQueue.filter(
-          (queued) => queued.id !== entry.id,
-        );
-        if (entry.previewUrl && typeof URL !== "undefined") {
-          URL.revokeObjectURL(entry.previewUrl);
-        }
-        this.renderAttachmentQueue();
-      });
-      header.appendChild(removeButton);
-      item.appendChild(header);
-
-      const meta = document.createElement("div");
-      meta.className = "text-xs text-muted";
-      const sizeLabel = formatAttachmentSize(entry.size);
-      meta.textContent = sizeLabel
-        ? `${entry.type || "file"} · ${sizeLabel}`
-        : entry.type || "file";
-      item.appendChild(meta);
-
-      if (entry.previewUrl && entry.type?.startsWith("image/")) {
-        const img = document.createElement("img");
-        img.src = entry.previewUrl;
-        img.alt = entry.name || "Attachment preview";
-        img.className = "h-24 w-24 rounded-lg object-cover";
-        img.loading = "lazy";
-        img.decoding = "async";
-        item.appendChild(img);
-      }
-
-      const progress = document.createElement("progress");
-      progress.className = "progress";
-      progress.value = entry.progress || 0;
-      progress.max = 1;
-      progress.dataset.variant = "surface";
-      item.appendChild(progress);
-
-      const status = document.createElement("div");
-      status.className = "text-xs text-muted";
-      status.textContent =
-        entry.status === "uploading"
-          ? "Uploading…"
-          : entry.status === "error"
-          ? entry.error || "Upload failed."
-          : "Ready to upload.";
-      item.appendChild(status);
-
-      list.appendChild(item);
-    });
+    renderAttachmentQueue(this);
   }
 
   async uploadAttachmentQueue(actorPubkey) {
-    const r2Service = this.services.r2Service;
-    if (!r2Service) {
-      throw new Error("Storage service unavailable.");
-    }
-
-    const encrypt =
-      this.dmController.profileMessageAttachmentEncrypt instanceof HTMLInputElement
-        ? this.dmController.profileMessageAttachmentEncrypt.checked
-        : false;
-
-    const payloads = [];
-
-    for (const entry of this.dmController.dmAttachmentQueue) {
-      entry.status = "uploading";
-      entry.progress = 0;
-      this.renderAttachmentQueue();
-
-      try {
-        const payload = await uploadAttachment({
-          r2Service,
-          pubkey: actorPubkey,
-          file: entry.file,
-          encrypt,
-          buildKey: buildR2Key,
-          buildUrl: buildPublicUrl,
-          onProgress: (fraction) => {
-            entry.progress = Number.isFinite(fraction) ? fraction : entry.progress;
-            this.renderAttachmentQueue();
-          },
-        });
-        payloads.push(payload);
-        entry.status = "uploaded";
-        entry.progress = 1;
-      } catch (error) {
-        entry.status = "error";
-        entry.error =
-          error && typeof error.message === "string"
-            ? error.message
-            : "Attachment upload failed.";
-        this.renderAttachmentQueue();
-        throw error;
-      }
-    }
-
-    return payloads;
+    return uploadAttachmentQueue(this, actorPubkey);
   }
 
 
 
-  resolveLatestDirectMessageForRecipient(recipientPubkey, actorPubkey = null) {
-    const normalizedRecipient =
-      typeof recipientPubkey === "string"
-        ? this.normalizeHexPubkey(recipientPubkey)
-        : "";
-    if (!normalizedRecipient || !Array.isArray(this.dmController.directMessagesCache)) {
-      return null;
-    }
-
-    const resolvedActor = actorPubkey
-      ? this.normalizeHexPubkey(actorPubkey)
-      : this.dmController.resolveActiveDmActor();
-
-    let latest = null;
-    let latestTimestamp = 0;
-
-    for (const entry of this.dmController.directMessagesCache) {
-      if (this.dmController.resolveDirectMessageRemote(entry, resolvedActor) !== normalizedRecipient) {
-        continue;
-      }
-      const timestamp = Number(entry?.timestamp) || 0;
-      if (!latest || timestamp > latestTimestamp) {
-        latest = entry;
-        latestTimestamp = timestamp;
-      }
-    }
-
-    return latest;
+  resolveLatestDirectMessageForRecipient(recipientPubkey, actorPubkey) {
+    return resolveLatestDirectMessageForRecipient(this, recipientPubkey, actorPubkey);
   }
 
 
 
   async maybePublishTypingIndicator() {
-    const settings = this.dmController.getDmPrivacySettingsSnapshot();
-    if (!settings.typingIndicatorsEnabled) {
-      return;
-    }
-
-    if (
-      !this.services.nostrClient ||
-      typeof this.services.nostrClient.publishDmTypingIndicator !== "function"
-    ) {
-      return;
-    }
-
-    const input = this.dmController.profileMessageInput;
-    const messageText =
-      input instanceof HTMLTextAreaElement ? input.value.trim() : "";
-    if (!messageText) {
-      return;
-    }
-
-    const recipient = this.dmController.resolveActiveDmRecipient();
-    if (!recipient) {
-      return;
-    }
-
-    const now = Date.now();
-    if (now - this.dmController.dmTypingLastSentAt < TYPING_INDICATOR_COOLDOWN_MS) {
-      return;
-    }
-
-    this.dmController.dmTypingLastSentAt = now;
-
-    const relayHints = this.dmController.buildDmRecipientContext(recipient)?.relayHints || [];
-    const latestMessage = this.resolveLatestDirectMessageForRecipient(
-      recipient,
-      this.dmController.resolveActiveDmActor(),
-    );
-    const latestEventId = this.dmController.resolveDirectMessageEventId(latestMessage);
-
-    try {
-      await this.services.nostrClient.publishDmTypingIndicator({
-        recipientPubkey: recipient,
-        conversationEventId: latestEventId || null,
-        relays: relayHints,
-        expiresInSeconds: TYPING_INDICATOR_TTL_SECONDS,
-      });
-    } catch (error) {
-      devLogger.warn("[profileModal] Failed to publish typing indicator:", error);
-    }
+    return maybePublishTypingIndicator(this);
   }
 
 
diff --git a/scripts/check-file-size.mjs b/scripts/check-file-size.mjs
index 59b8c9d7..43509d47 100644
--- a/scripts/check-file-size.mjs
+++ b/scripts/check-file-size.mjs
@@ -26,7 +26,7 @@ const GROWTH_MARGIN = 50; // lines — allowlisted files may grow by this much f
 // These files are known to be oversized and are decomposition targets.
 // They must NOT grow beyond (recorded + GROWTH_MARGIN).
 const GRANDFATHERED = {
-  "js/ui/profileModalController.js": 8130,
+  "js/ui/profileModalController.js": 5884,
   "js/ui/components/VideoModal.js": 6045,
   "js/app.js": 5602,
   "js/channelProfile.js": 5529,
diff --git a/test_logs/TEST_LOG_1739837127.md b/test_logs/TEST_LOG_1739837127.md
new file mode 100644
index 00000000..c19e0f71
--- /dev/null
+++ b/test_logs/TEST_LOG_1739837127.md
@@ -0,0 +1,33 @@
+# Test Log
+
+## Environment
+- Date: 2026-02-18
+- Agent: decompose-agent
+- File: js/ui/profileModalController.js
+
+## Commands
+1. **Lint**
+   ```bash
+   npm run lint
+   ```
+   **Result:** Passed (with expected asset warnings in dev).
+
+2. **Unit Tests**
+   ```bash
+   node scripts/run-unit-tests.mjs tests/profile-modal-controller.test.mjs
+   ```
+   **Result:** Passed (18 tests).
+
+3. **File Size Check**
+   ```bash
+   node scripts/check-file-size.mjs --report
+   node scripts/check-file-size.mjs --update
+   ```
+   **Result:**
+   - Reduced `js/ui/profileModalController.js` from 6258 to 5884 lines.
+   - Updated baseline in `scripts/check-file-size.mjs`.
+
+## Manual QA
+- Verified imports in `js/ui/profileModalController.js`.
+- Verified logic in new binder files.
+- Verified no circular dependencies (binders only import utils, controller passes `this`).
diff --git a/todo/TODO_1739837127.md b/todo/TODO_1739837127.md
new file mode 100644
index 00000000..e09e1d8e
--- /dev/null
+++ b/todo/TODO_1739837127.md
@@ -0,0 +1,4 @@
+- [ ] Extract DM Relay UI Logic to `js/ui/profileModal/ProfileDmRelayBinder.js`
+- [ ] Extract DM Attachment Logic to `js/ui/profileModal/ProfileDmAttachmentBinder.js`
+- [ ] Update `js/ui/profileModalController.js` to import and use the new binders
+- [ ] Verify lint and tests