diff --git a/config/patches/@tiptap__extension-list@3.31.3.patch b/config/patches/@tiptap__extension-list@3.31.3.patch
new file mode 100644
index 00000000000..4f1640a6920
--- /dev/null
+++ b/config/patches/@tiptap__extension-list@3.31.3.patch
@@ -0,0 +1,102 @@
+diff --git a/dist/index.cjs b/dist/index.cjs
+index 283575c0a81fa24ea2d73cb8096de05bce7ab26b..c7b19bda70eececb4688250f8bd11cbe6db6a9aa 100644
+--- a/dist/index.cjs
++++ b/dist/index.cjs
+@@ -245,10 +245,9 @@ const ROMAN_NUMERALS = [
+ ];
+ const ALPHA_NUMERALS = "abcdefghijklmnopqrstuvwxyz";
+ /**
+-* Marker segment for ordered list lines: numeric, roman, or 1–2 letter alpha.
+-* Roman is matched before alpha so "iii" is roman; invalid romans like "aa" fall through to alpha.
++* Orca patch: ordered-list markers are digits only, as in CommonMark, so "Dr." and "A." stay prose.
+ */
+-const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+|[ivxlcdmIVXLCDM]+|${"[a-zA-Z]{1,2}"}`;
++const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+`;
+ /**
+ * Convert a number to lowercase roman numerals.
+ * @example toRoman(1) // 'i'
+diff --git a/dist/index.js b/dist/index.js
+index 1fa29e72a755ce527b1840765bbe44e80df38c3d..9a857225b17a51fa6afd14674502e556566bef8c 100644
+--- a/dist/index.js
++++ b/dist/index.js
+@@ -233,10 +233,9 @@ const ROMAN_NUMERALS = [
+ ];
+ const ALPHA_NUMERALS = "abcdefghijklmnopqrstuvwxyz";
+ /**
+-* Marker segment for ordered list lines: numeric, roman, or 1–2 letter alpha.
+-* Roman is matched before alpha so "iii" is roman; invalid romans like "aa" fall through to alpha.
++* Orca patch: ordered-list markers are digits only, as in CommonMark, so "Dr." and "A." stay prose.
+ */
+-const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+|[ivxlcdmIVXLCDM]+|${"[a-zA-Z]{1,2}"}`;
++const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+`;
+ /**
+ * Convert a number to lowercase roman numerals.
+ * @example toRoman(1) // 'i'
+diff --git a/dist/kit/index.cjs b/dist/kit/index.cjs
+index a1f217bd0eb67c84404a4e4b447379eaf3a7f367..1f26c89d35a87bcd98113ad425245a9d86cb7ef0 100644
+--- a/dist/kit/index.cjs
++++ b/dist/kit/index.cjs
+@@ -233,10 +233,9 @@ const ROMAN_NUMERALS = [
+ ];
+ const ALPHA_NUMERALS = "abcdefghijklmnopqrstuvwxyz";
+ /**
+-* Marker segment for ordered list lines: numeric, roman, or 1–2 letter alpha.
+-* Roman is matched before alpha so "iii" is roman; invalid romans like "aa" fall through to alpha.
++* Orca patch: ordered-list markers are digits only, as in CommonMark, so "Dr." and "A." stay prose.
+ */
+-const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+|[ivxlcdmIVXLCDM]+|${"[a-zA-Z]{1,2}"}`;
++const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+`;
+ /**
+ * Convert a number to lowercase roman numerals.
+ * @example toRoman(1) // 'i'
+diff --git a/dist/kit/index.js b/dist/kit/index.js
+index ee2b2a9114cb40daa6061340ccd80d128c2981ba..8152d964a20dfac20fc3234f93182325593d027d 100644
+--- a/dist/kit/index.js
++++ b/dist/kit/index.js
+@@ -232,10 +232,9 @@ const ROMAN_NUMERALS = [
+ ];
+ const ALPHA_NUMERALS = "abcdefghijklmnopqrstuvwxyz";
+ /**
+-* Marker segment for ordered list lines: numeric, roman, or 1–2 letter alpha.
+-* Roman is matched before alpha so "iii" is roman; invalid romans like "aa" fall through to alpha.
++* Orca patch: ordered-list markers are digits only, as in CommonMark, so "Dr." and "A." stay prose.
+ */
+-const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+|[ivxlcdmIVXLCDM]+|${"[a-zA-Z]{1,2}"}`;
++const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+`;
+ /**
+ * Convert a number to lowercase roman numerals.
+ * @example toRoman(1) // 'i'
+diff --git a/dist/ordered-list/index.cjs b/dist/ordered-list/index.cjs
+index 9373d830293b67e463c9764cec5bacd8c189b473..4292a2b0f1b45fdc0f06d6fe7f351f7484e45974 100644
+--- a/dist/ordered-list/index.cjs
++++ b/dist/ordered-list/index.cjs
+@@ -19,10 +19,9 @@ const ROMAN_NUMERALS = [
+ ];
+ const ALPHA_NUMERALS = "abcdefghijklmnopqrstuvwxyz";
+ /**
+-* Marker segment for ordered list lines: numeric, roman, or 1–2 letter alpha.
+-* Roman is matched before alpha so "iii" is roman; invalid romans like "aa" fall through to alpha.
++* Orca patch: ordered-list markers are digits only, as in CommonMark, so "Dr." and "A." stay prose.
+ */
+-const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+|[ivxlcdmIVXLCDM]+|${"[a-zA-Z]{1,2}"}`;
++const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+`;
+ /**
+ * Convert a number to lowercase roman numerals.
+ * @example toRoman(1) // 'i'
+diff --git a/dist/ordered-list/index.js b/dist/ordered-list/index.js
+index ace73267067e8c785e080cbf5bc6655a0527aa36..de1bb3061ec1629b20616f10a42eeba0a4e2222d 100644
+--- a/dist/ordered-list/index.js
++++ b/dist/ordered-list/index.js
+@@ -18,10 +18,9 @@ const ROMAN_NUMERALS = [
+ ];
+ const ALPHA_NUMERALS = "abcdefghijklmnopqrstuvwxyz";
+ /**
+-* Marker segment for ordered list lines: numeric, roman, or 1–2 letter alpha.
+-* Roman is matched before alpha so "iii" is roman; invalid romans like "aa" fall through to alpha.
++* Orca patch: ordered-list markers are digits only, as in CommonMark, so "Dr." and "A." stay prose.
+ */
+-const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+|[ivxlcdmIVXLCDM]+|${"[a-zA-Z]{1,2}"}`;
++const ORDERED_LIST_MARKER_PATTERN = String.raw`\d+`;
+ /**
+ * Convert a number to lowercase roman numerals.
+ * @example toRoman(1) // 'i'
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 8a23d9eb85d..6e9a7bbb654 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -173,6 +173,7 @@ packageExtensionsChecksum: sha256-TrarseUCmMKP0lVjkfyLP2TAvkGZMZzvzPxjKY48nrY=
 pnpmfileChecksum: sha256-6l6qdgUHKyTLYIQLx/UGfGRnEiFXxIaSlGMgK4mttEw=
 
 patchedDependencies:
+  '@tiptap/extension-list@3.31.3': 294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd
   '@vscode/windows-process-tree@0.8.0': a09f2e8b2b4e73ef20c317af91f9e06c09abf62fa2c891d99b16f53047f596fd
   '@xterm/addon-image@0.10.0-beta.301': f088c9207dac42844a542b9da8078be52351cee60585725ef189b9fd30f33f34
   '@xterm/addon-ligatures@0.11.0-beta.301': 47405b9994b5acf1b4e90b49250358c1ca03649854d59560e7732b72fe336920
@@ -345,7 +346,7 @@ importers:
         version: 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
       '@tiptap/extension-list':
         specifier: 3.31.3
-        version: 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
+        version: 3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
       '@tiptap/extension-mathematics':
         specifier: 3.31.3
         version: 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)(@types/katex@0.16.8)(katex@0.18.10)
@@ -10399,9 +10400,9 @@ snapshots:
       '@tiptap/pm': 3.31.3
     optional: true
 
-  '@tiptap/extension-bullet-list@3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
+  '@tiptap/extension-bullet-list@3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
     dependencies:
-      '@tiptap/extension-list': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
+      '@tiptap/extension-list': 3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
 
   '@tiptap/extension-code-block-lowlight@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/extension-code-block@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)(highlight.js@11.11.1)(lowlight@3.3.0)':
     dependencies:
@@ -10472,15 +10473,15 @@ snapshots:
       '@tiptap/pm': 3.31.3
       linkifyjs: 4.3.3
 
-  '@tiptap/extension-list-item@3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
+  '@tiptap/extension-list-item@3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
     dependencies:
-      '@tiptap/extension-list': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
+      '@tiptap/extension-list': 3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
 
-  '@tiptap/extension-list-keymap@3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
+  '@tiptap/extension-list-keymap@3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
     dependencies:
-      '@tiptap/extension-list': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
+      '@tiptap/extension-list': 3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
 
-  '@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)':
+  '@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)':
     dependencies:
       '@tiptap/core': 3.31.3(@tiptap/pm@3.31.3)
       '@tiptap/pm': 3.31.3
@@ -10494,9 +10495,9 @@ snapshots:
     optionalDependencies:
       '@types/katex': 0.16.8
 
-  '@tiptap/extension-ordered-list@3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
+  '@tiptap/extension-ordered-list@3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))':
     dependencies:
-      '@tiptap/extension-list': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
+      '@tiptap/extension-list': 3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
 
   '@tiptap/extension-paragraph@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))':
     dependencies:
@@ -10577,7 +10578,7 @@ snapshots:
       '@tiptap/core': 3.31.3(@tiptap/pm@3.31.3)
       '@tiptap/extension-blockquote': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
       '@tiptap/extension-bold': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))
-      '@tiptap/extension-bullet-list': 3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
+      '@tiptap/extension-bullet-list': 3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
       '@tiptap/extension-code': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))
       '@tiptap/extension-code-block': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
       '@tiptap/extension-document': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))
@@ -10588,10 +10589,10 @@ snapshots:
       '@tiptap/extension-horizontal-rule': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
       '@tiptap/extension-italic': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))
       '@tiptap/extension-link': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
-      '@tiptap/extension-list': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
-      '@tiptap/extension-list-item': 3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
-      '@tiptap/extension-list-keymap': 3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
-      '@tiptap/extension-ordered-list': 3.31.3(@tiptap/extension-list@3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
+      '@tiptap/extension-list': 3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3)
+      '@tiptap/extension-list-item': 3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
+      '@tiptap/extension-list-keymap': 3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
+      '@tiptap/extension-ordered-list': 3.31.3(@tiptap/extension-list@3.31.3(patch_hash=294a9c187f6733c78b52c5ac182a8adf90c24c07093a2b40b68725cdb320d7bd)(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))(@tiptap/pm@3.31.3))
       '@tiptap/extension-paragraph': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))
       '@tiptap/extension-strike': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))
       '@tiptap/extension-text': 3.31.3(@tiptap/core@3.31.3(@tiptap/pm@3.31.3))
diff --git a/pnpm-workspace.yaml b/pnpm-workspace.yaml
index d9e70d16421..99459322481 100644
--- a/pnpm-workspace.yaml
+++ b/pnpm-workspace.yaml
@@ -136,3 +136,4 @@ patchedDependencies:
   oxlint-plugin-anti-slop@0.1.2: config/patches/oxlint-plugin-anti-slop@0.1.2.patch
   monaco-editor@0.55.1: config/patches/monaco-editor@0.55.1.patch
   sprintf-js@1.1.3: config/patches/sprintf-js@1.1.3.patch
+  '@tiptap/extension-list@3.31.3': config/patches/@tiptap__extension-list@3.31.3.patch
diff --git a/src/renderer/src/components/editor/rich-markdown-blockquote-list.test.ts b/src/renderer/src/components/editor/rich-markdown-blockquote-list.test.ts
index 0980dd849de..9dd0a96cbdc 100644
--- a/src/renderer/src/components/editor/rich-markdown-blockquote-list.test.ts
+++ b/src/renderer/src/components/editor/rich-markdown-blockquote-list.test.ts
@@ -15,10 +15,11 @@ function openMarkdown(source: string): Editor {
 }
 
 describe('rich markdown blockquote list continuations', () => {
-  it.each(['a.', 'Z)', 'aa.', 'zz)', 'I.', 'iii)', '1.', '3)', '1234567890.'])(
+  // A no-break space reaches the fallback (only Tiptap reads it); plain spaces are controls.
+  it.each(['1.\u00a0', '3)\u00a0', '1234567890.\u00a0', '1. ', '3) '])(
     'opens %j without throwing during Markdown initialization',
     (marker) => {
-      const source = `> ${marker} first\ncontinued`
+      const source = `> ${marker}first\ncontinued`
       const codec = createRichMarkdownEditorCodec()
       const editor = new Editor({
         element: null,
@@ -39,7 +40,7 @@ describe('rich markdown blockquote list continuations', () => {
           element: null,
           extensions: createRichMarkdownExtensions({ codec: expectedCodec }),
           content: encodeRawMarkdownHtmlForRichEditor(
-            `> ${marker} first\n> continued`,
+            `> ${marker}first\n> continued`,
             expectedCodec
           ),
           contentType: 'markdown'
@@ -56,49 +57,36 @@ describe('rich markdown blockquote list continuations', () => {
   )
 
   it.each([
-    ['> a. x\nlazy\n> b. y\nlazy2\n', '> 1. x\nlazy\n> 2. y\nlazy2\n'],
-    ['> a. x\nlazy\n> quoted para\n', '> 1. x\nlazy\n> quoted para\n'],
-    ['> a. x\n>    > nested\nlazy', '> 1. x\n>    > nested\nlazy'],
+    ['> 1.\u00a0x\nlazy\n> 2.\u00a0y\nlazy2\n', '> 1. x\nlazy\n> 2. y\nlazy2\n'],
+    ['> 1.\u00a0x\nlazy\n> quoted para\n', '> 1. x\nlazy\n> quoted para\n'],
+    ['> 1.\u00a0x\n>    > nested\nlazy', '> 1. x\n>    > nested\nlazy'],
     [
-      '> a. x\n>    > nested\n>    > more\n> b. y\nlazy',
+      '> 1.\u00a0x\n>    > nested\n>    > more\n> 2.\u00a0y\nlazy',
       '> 1. x\n>    > nested\n>    > more\n> 2. y\nlazy'
     ],
-    ['> a. x\nlazy\n   > y', '> 1. x\nlazy\n   > y'],
-    ['> a.\tx\nlazy\n   > y', '> 1.\tx\nlazy\n   > y'],
+    ['> 1.\u00a0x\nlazy\n   > y', '> 1. x\nlazy\n   > y'],
     // Tiptap reads a 5+ space gap as text, not code; compare with the fully quoted form.
-    ['> a.     x\n>    > nested\nlazy', '> a.     x\n>    > nested\n>    > lazy'],
-    ['> iv. x\n> v. y\n>    > nested\nlazy', '> iv. x\n> v. y\n>    > nested\n>    > lazy']
-  ])(
-    'ends the continued list at the next quoted line like a numeric list: %j',
-    (source, numeric) => {
-      const editor = openMarkdown(source)
-      const control = openMarkdown(numeric)
-      try {
-        const withoutListAttrs = (json: unknown): string =>
-          JSON.stringify(json).replace(/"attrs":\{[^}]*\},?/g, '')
-        expect(withoutListAttrs(editor.getJSON())).toEqual(withoutListAttrs(control.getJSON()))
-        const withoutMarkers = (markdown: string): string =>
-          markdown.replace(/[a-zA-Z0-9]+[.)](?= )/g, '#.')
-        expect(withoutMarkers(editor.getMarkdown())).toBe(withoutMarkers(control.getMarkdown()))
-      } finally {
-        editor.destroy()
-        control.destroy()
-      }
+    ['> 1.\u00a0    x\n>    > nested\nlazy', '> 1.\u00a0    x\n>    > nested\n>    > lazy']
+  ])('ends the continued list at the next quoted line: %j', (source, control) => {
+    const editor = openMarkdown(source)
+    const expected = openMarkdown(control)
+    try {
+      expect(editor.getJSON()).toEqual(expected.getJSON())
+      expect(editor.getMarkdown()).toBe(expected.getMarkdown())
+    } finally {
+      editor.destroy()
+      expected.destroy()
     }
-  )
+  })
 
   // Guards a dependency bump: any item start Tiptap accepts must still reach the fallback.
   it.each([
-    '> \ta. x\nlazy',
-    '>     a. x\nlazy',
-    '> a.\u00a0x\nlazy',
+    '> \t1. x\nlazy',
+    '>     1. x\nlazy',
     '> 1.\u00a0x\nlazy',
-    '> a.\tx\nlazy',
-    '> Mr. Smith\nlazy',
-    '> iv) x\nlazy',
-    '> zz. x\nlazy',
-    '>  > a. x\nlazy',
-    '> a. x\r\nlazy'
+    '> 4)\u00a0x\nlazy',
+    '>  > 1.\u00a0x\nlazy',
+    '> 1.\u00a0x\r\nlazy'
   ])('opens %j with whitespace Tiptap accepts but Marked does not', (source) => {
     const editor = openMarkdown(source)
     try {
@@ -109,7 +97,7 @@ describe('rich markdown blockquote list continuations', () => {
   })
 
   it('opens many quoted lazy continuations without nesting each into the last', () => {
-    const editor = openMarkdown('> a. x\nlazy\n'.repeat(1000))
+    const editor = openMarkdown('> 1.\u00a0x\nlazy\n'.repeat(1000))
     try {
       expect(JSON.stringify(editor.getJSON()).match(/"blockquote"/g)).toHaveLength(1)
       expect(editor.getText()).toContain('lazy')
diff --git a/src/renderer/src/components/editor/rich-markdown-list-tokenizers.test.ts b/src/renderer/src/components/editor/rich-markdown-list-tokenizers.test.ts
index 8fb68a0cd1e..b0765c0d93e 100644
--- a/src/renderer/src/components/editor/rich-markdown-list-tokenizers.test.ts
+++ b/src/renderer/src/components/editor/rich-markdown-list-tokenizers.test.ts
@@ -51,8 +51,8 @@ describe('rich markdown list tokenizers', () => {
     )
   })
 
-  it.each(['a. first\nb. second\n', 'I. first\nII. second\n', '  3. indented\n'])(
-    'preserves upstream ordered marker support for %j',
+  it.each(['1) first\n2) second\n', '1.\u00a0no-break space\n', '  3. indented\n'])(
+    'matches the base tokenizer for %j',
     (source) => {
       expect(getTokenizer(RichMarkdownOrderedList).tokenize(source, [], lexer)).toEqual(
         getTokenizer(OrderedList).tokenize(source, [], lexer)
diff --git a/src/renderer/src/components/editor/rich-markdown-ordered-list.test.ts b/src/renderer/src/components/editor/rich-markdown-ordered-list.test.ts
new file mode 100644
index 00000000000..daea66c4ee2
--- /dev/null
+++ b/src/renderer/src/components/editor/rich-markdown-ordered-list.test.ts
@@ -0,0 +1,65 @@
+// @vitest-environment happy-dom
+import { Editor } from '@tiptap/core'
+import { describe, expect, it } from 'vitest'
+import { encodeRawMarkdownHtmlForRichEditor } from './raw-markdown-html'
+import { createRichMarkdownExtensions } from './rich-markdown-extensions'
+import { createRichMarkdownEditorCodec } from './rich-markdown-source-transport'
+
+function openMarkdown(source: string): Editor {
+  const codec = createRichMarkdownEditorCodec()
+  return new Editor({
+    element: null,
+    extensions: createRichMarkdownExtensions({ codec }),
+    content: encodeRawMarkdownHtmlForRichEditor(source, codec),
+    contentType: 'markdown'
+  })
+}
+
+function orderedListCount(editor: Editor): number {
+  return JSON.stringify(editor.getJSON()).match(/"type":"orderedList"/g)?.length ?? 0
+}
+
+describe('rich markdown ordered list markers', () => {
+  it.each([
+    'Mr. Smith came back.\n\nDr. Jones looked at him.\n\nSt. Louis was a long way off.',
+    'A. Smith wrote back.\n\nOK. That works.\n\niv. is not a list here.\n\nI. said so.',
+    '> a. first\n> continued'
+  ])('keeps %j as prose when opened and saved', (source) => {
+    const editor = openMarkdown(source)
+    try {
+      expect(orderedListCount(editor)).toBe(0)
+      expect(editor.getMarkdown()).toBe(source)
+    } finally {
+      editor.destroy()
+    }
+  })
+
+  it.each([
+    ['1. one\n2. two\n\nDr. Smith said.', 1],
+    ['1. one\nDr. Smith said.', 1],
+    ['3. three\n4. four', 1],
+    ['1. parent\n   1. child\n   2. child two\n2. sibling', 2],
+    ['1. [ ] task\n2. [x] done', 1]
+  ] as const)('round-trips numeric list %j unchanged', (source, lists) => {
+    const editor = openMarkdown(source)
+    try {
+      expect(orderedListCount(editor)).toBe(lists)
+      expect(editor.getMarkdown()).toBe(source)
+    } finally {
+      editor.destroy()
+    }
+  })
+
+  it('saves a lettered list pasted as HTML with numeric markers', () => {
+    const editor = new Editor({
+      element: null,
+      extensions: createRichMarkdownExtensions({ codec: createRichMarkdownEditorCodec() }),
+      content: '<ol type="a" start="2"><li><p>x</p></li><li><p>y</p></li></ol>'
+    })
+    try {
+      expect(editor.getMarkdown()).toBe('2. x\n3. y')
+    } finally {
+      editor.destroy()
+    }
+  })
+})
diff --git a/src/renderer/src/components/editor/rich-markdown-ordered-list.ts b/src/renderer/src/components/editor/rich-markdown-ordered-list.ts
index 4ccf53eae77..a454de984ca 100644
--- a/src/renderer/src/components/editor/rich-markdown-ordered-list.ts
+++ b/src/renderer/src/components/editor/rich-markdown-ordered-list.ts
@@ -6,6 +6,11 @@ const orderedListStart = new RegExp(`^\\s*(?:${ORDERED_LIST_MARKER_PATTERN})[.)]
 const baseTokenizer = OrderedList.config.markdownTokenizer as MarkdownTokenizer
 
 export const RichMarkdownOrderedList = OrderedList.extend({
+  addAttributes() {
+    // Why: Markdown reads only numeric markers, so a lettered HTML paste shows and saves as "1."
+    const { type: _letteredType, ...attributes } = this.parent?.() ?? {}
+    return attributes
+  },
   markdownTokenizer: {
     ...baseTokenizer,
     tokenize(src, tokens, lexer) {
diff --git a/src/renderer/src/components/editor/tiptap-marked-facade.ts b/src/renderer/src/components/editor/tiptap-marked-facade.ts
index 40d512a89d1..b90b975294d 100644
--- a/src/renderer/src/components/editor/tiptap-marked-facade.ts
+++ b/src/renderer/src/components/editor/tiptap-marked-facade.ts
@@ -17,7 +17,7 @@ import {
 import { ORDERED_LIST_MARKER_PATTERN } from '@tiptap/extension-list'
 
 // Same item start Tiptap's ordered list accepts, so every list it built can be re-read here.
-const EXTENDED_LIST_ITEM = new RegExp(`^(\\s*(?:${ORDERED_LIST_MARKER_PATTERN})[.)])(\\s+)`)
+const TIPTAP_LIST_ITEM = new RegExp(`^(\\s*(?:${ORDERED_LIST_MARKER_PATTERN})[.)])(\\s+)`)
 
 function expandColumns(text: string, startColumn = 0): number {
   let column = startColumn
@@ -41,7 +41,7 @@ function sliceBeforeOuterQuote(source: string): string {
   let contentIndent = 0
   let outerQuoteLine = /^>/
   for (const [index, line] of lines.entries()) {
-    const item = EXTENDED_LIST_ITEM.exec(line)
+    const item = TIPTAP_LIST_ITEM.exec(line)
     const lineIndent = expandColumns(/^\s*/.exec(line)?.[0] ?? '')
     if (item && (index === 0 || lineIndent < contentIndent)) {
       contentIndent = getItemContentIndent(item)
@@ -58,11 +58,11 @@ function isListToken(token: Tokens.Generic | undefined): token is Tokens.List {
 }
 
 class BlockquoteListTokenizer extends Tokenizer {
-  // Why: Marked's blockquote() lazy continuation calls `this.list(newText)!` (still so in
-  // v18), skipping the registered extended-marker (a., iii)) tokenizers, then reads `.raw`.
+  // Why: Marked's blockquote() lazy continuation calls `this.list(newText)!` (still so in v18),
+  // skipping the registered tokenizer that also reads `1.` + no-break space, then reads `.raw`.
   list(source: string): Tokens.List | undefined {
     const token = super.list(source)
-    if (token || !EXTENDED_LIST_ITEM.test(source)) {
+    if (token || !TIPTAP_LIST_ITEM.test(source)) {
       return token
     }
     const listSource = sliceBeforeOuterQuote(source)