diff --git a/src/components/editor/MentionEditor.tsx b/src/components/editor/MentionEditor.tsx
index 2f56936..43d0a19 100644
--- a/src/components/editor/MentionEditor.tsx
+++ b/src/components/editor/MentionEditor.tsx
@@ -169,6 +169,18 @@ export const MentionEditor = forwardRef<
         }),
         StarterKit.configure({
           hardBreak: { keepMarks: false },
+          // Disable all rich text / markdown syntax — these are plain text editors
+          bold: false,
+          italic: false,
+          strike: false,
+          code: false,
+          codeBlock: false,
+          blockquote: false,
+          bulletList: false,
+          orderedList: false,
+          listItem: false,
+          heading: false,
+          horizontalRule: false,
         }),
         Mention.configure({
           HTMLAttributes: { class: "mention" },
diff --git a/src/components/editor/RichEditor.tsx b/src/components/editor/RichEditor.tsx
index a2ccce6..ec06243 100644
--- a/src/components/editor/RichEditor.tsx
+++ b/src/components/editor/RichEditor.tsx
@@ -138,6 +138,18 @@ export const RichEditor = forwardRef<RichEditorHandle, RichEditorProps>(
         }),
         StarterKit.configure({
           hardBreak: { keepMarks: false },
+          // Disable all rich text / markdown syntax — these are plain text editors
+          bold: false,
+          italic: false,
+          strike: false,
+          code: false,
+          codeBlock: false,
+          blockquote: false,
+          bulletList: false,
+          orderedList: false,
+          listItem: false,
+          heading: false,
+          horizontalRule: false,
         }),
         Mention.extend({
           renderText({ node }) {