diff --git a/app/assets/javascripts/discourse/app/components/composer-editor.js b/app/assets/javascripts/discourse/app/components/composer-editor.js
index eed18fe3b1a..71312232091 100644
--- a/app/assets/javascripts/discourse/app/components/composer-editor.js
+++ b/app/assets/javascripts/discourse/app/components/composer-editor.js
@@ -103,7 +103,10 @@ export default Component.extend(ComposerUploadUppy, {
   editorClass: ".d-editor",
   fileUploadElementId: "file-uploader",
   mobileFileUploaderId: "mobile-file-upload",
+
+  // TODO (martin) Remove this once the chat plugin is using the new composerEventPrefix
   eventPrefix: "composer",
+  composerEventPrefix: "composer",
   uploadType: "composer",
   uppyId: "composer-editor-uppy",
   composerModel: alias("composer"),
diff --git a/app/assets/javascripts/discourse/app/mixins/composer-upload-uppy.js b/app/assets/javascripts/discourse/app/mixins/composer-upload-uppy.js
index 0442cf96972..929ab63c14f 100644
--- a/app/assets/javascripts/discourse/app/mixins/composer-upload-uppy.js
+++ b/app/assets/javascripts/discourse/app/mixins/composer-upload-uppy.js
@@ -67,9 +67,9 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
 
     this.editorEl?.removeEventListener("paste", this.pasteEventListener);
 
-    this.appEvents.off(`${this.eventPrefix}:add-files`, this._addFiles);
+    this.appEvents.off(`${this.composerEventPrefix}:add-files`, this._addFiles);
     this.appEvents.off(
-      `${this.eventPrefix}:cancel-upload`,
+      `${this.composerEventPrefix}:cancel-upload`,
       this._cancelSingleUpload
     );
 
@@ -84,7 +84,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
   },
 
   _abortAndReset() {
-    this.appEvents.trigger(`${this.eventPrefix}:uploads-aborted`);
+    this.appEvents.trigger(`${this.composerEventPrefix}:uploads-aborted`);
     this._reset();
     return false;
   },
@@ -97,9 +97,9 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
     this.fileInputEl = document.getElementById(this.fileUploadElementId);
     const isPrivateMessage = this.get("composerModel.privateMessage");
 
-    this.appEvents.on(`${this.eventPrefix}:add-files`, this._addFiles);
+    this.appEvents.on(`${this.composerEventPrefix}:add-files`, this._addFiles);
     this.appEvents.on(
-      `${this.eventPrefix}:cancel-upload`,
+      `${this.composerEventPrefix}:cancel-upload`,
       this._cancelSingleUpload
     );
 
@@ -136,7 +136,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
         });
 
         if (!isUploading) {
-          this.appEvents.trigger(`${this.eventPrefix}:uploads-aborted`);
+          this.appEvents.trigger(`${this.composerEventPrefix}:uploads-aborted`);
         }
         return isUploading;
       },
@@ -290,11 +290,11 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
             uploadPlaceholder: placeholder,
           };
           this.appEvents.trigger(
-            `${this.eventPrefix}:insert-text`,
+            `${this.composerEventPrefix}:insert-text`,
             placeholder
           );
           this.appEvents.trigger(
-            `${this.eventPrefix}:upload-started`,
+            `${this.composerEventPrefix}:upload-started`,
             file.name
           );
         });
@@ -316,14 +316,14 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
         cacheShortUploadUrl(upload.short_url, upload);
 
         this.appEvents.trigger(
-          `${this.eventPrefix}:replace-text`,
+          `${this.composerEventPrefix}:replace-text`,
           this.placeholders[file.id].uploadPlaceholder.trim(),
           markdown
         );
 
         this._resetUpload(file, { removePlaceholder: false });
         this.appEvents.trigger(
-          `${this.eventPrefix}:upload-success`,
+          `${this.composerEventPrefix}:upload-success`,
           file.name,
           upload
         );
@@ -334,7 +334,9 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
 
     this._uppyInstance.on("complete", () => {
       run(() => {
-        this.appEvents.trigger(`${this.eventPrefix}:all-uploads-complete`);
+        this.appEvents.trigger(
+          `${this.composerEventPrefix}:all-uploads-complete`
+        );
         this._reset();
       });
     });
@@ -346,7 +348,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
         Object.values(this.placeholders).forEach((data) => {
           run(() => {
             this.appEvents.trigger(
-              `${this.eventPrefix}:replace-text`,
+              `${this.composerEventPrefix}:replace-text`,
               data.uploadPlaceholder,
               ""
             );
@@ -356,7 +358,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
         this.set("userCancelled", false);
         this._reset();
 
-        this.appEvents.trigger(`${this.eventPrefix}:uploads-cancelled`);
+        this.appEvents.trigger(`${this.composerEventPrefix}:uploads-cancelled`);
       }
     });
 
@@ -381,7 +383,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
 
     if (!this.userCancelled) {
       displayErrorForUpload(response || error, this.siteSettings, file.name);
-      this.appEvents.trigger(`${this.eventPrefix}:upload-error`, file);
+      this.appEvents.trigger(`${this.composerEventPrefix}:upload-error`, file);
     }
 
     if (this.inProgressUploads.length === 0) {
@@ -434,7 +436,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
       )}]()\n`;
 
       this.appEvents.trigger(
-        `${this.eventPrefix}:replace-text`,
+        `${this.composerEventPrefix}:replace-text`,
         placeholderData.uploadPlaceholder,
         placeholderData.processingPlaceholder
       );
@@ -445,7 +447,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
         run(() => {
           let placeholderData = this.placeholders[file.id];
           this.appEvents.trigger(
-            `${this.eventPrefix}:replace-text`,
+            `${this.composerEventPrefix}:replace-text`,
             placeholderData.processingPlaceholder,
             placeholderData.uploadPlaceholder
           );
@@ -458,7 +460,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
             isCancellable: true,
           });
           this.appEvents.trigger(
-            `${this.eventPrefix}:uploads-preprocessing-complete`
+            `${this.composerEventPrefix}:uploads-preprocessing-complete`
           );
         });
       }
@@ -536,7 +538,7 @@ export default Mixin.create(ExtendableUploader, UppyS3Multipart, {
   _resetUpload(file, opts) {
     if (opts.removePlaceholder) {
       this.appEvents.trigger(
-        `${this.eventPrefix}:replace-text`,
+        `${this.composerEventPrefix}:replace-text`,
         this.placeholders[file.id].uploadPlaceholder,
         ""
       );
diff --git a/app/assets/javascripts/discourse/app/mixins/textarea-text-manipulation.js b/app/assets/javascripts/discourse/app/mixins/textarea-text-manipulation.js
index ab6aeab38a7..bb5c5dfd2d5 100644
--- a/app/assets/javascripts/discourse/app/mixins/textarea-text-manipulation.js
+++ b/app/assets/javascripts/discourse/app/mixins/textarea-text-manipulation.js
@@ -34,6 +34,13 @@ export function getHead(head, prev) {
 export default Mixin.create({
   init() {
     this._super(...arguments);
+
+    // fallback in the off chance someone has implemented a custom composer
+    // which does not define this
+    if (!this.composerEventPrefix) {
+      this.composerEventPrefix = "composer";
+    }
+
     generateLinkifyFunction(this.markdownOptions || {}).then((linkify) => {
       // When pasting links, we should use the same rules to match links as we do when creating links for a cooked post.
       this._cachedLinkify = linkify;
@@ -456,7 +463,10 @@ export default Mixin.create({
       plainText = plainText.replace(/\r/g, "");
       const table = this._extractTable(plainText);
       if (table) {
-        this.appEvents.trigger("composer:insert-text", table);
+        this.appEvents.trigger(
+          `${this.composerEventPrefix}:insert-text`,
+          table
+        );
         handled = true;
       }
     }
@@ -508,7 +518,10 @@ export default Mixin.create({
         }
 
         if (isComposer) {
-          this.appEvents.trigger("composer:insert-text", markdown);
+          this.appEvents.trigger(
+            `${this.composerEventPrefix}:insert-text`,
+            markdown
+          );
           handled = true;
         }
       }