diff --git a/corpus/round-trip/combinations/carry-text-attributes.json b/corpus/round-trip/combinations/carry-text-attributes.json
index fbc01a1..8e23c5f 100644
--- a/corpus/round-trip/combinations/carry-text-attributes.json
+++ b/corpus/round-trip/combinations/carry-text-attributes.json
@@ -50,25 +50,6 @@
         }
       ],
       "type": "paragraph"
-    },
-    {
-      "content": [
-        {
-          "attrs": {
-            "localId": "01a0a067-68cf-78af-abd6-c660ec0d189b"
-          },
-          "text": "Two ",
-          "type": "text"
-        },
-        {
-          "attrs": {
-            "localId": "01a0a067-68d9-73fa-9b9a-caa42061993c"
-          },
-          "text": "anchors",
-          "type": "text"
-        }
-      ],
-      "type": "paragraph"
     }
   ],
   "type": "doc",
diff --git a/corpus/round-trip/combinations/carry-text-attributes.md b/corpus/round-trip/combinations/carry-text-attributes.md
index 83c35d2..dad9c07 100644
--- a/corpus/round-trip/combinations/carry-text-attributes.md
+++ b/corpus/round-trip/combinations/carry-text-attributes.md
@@ -3,5 +3,3 @@
 Signed by :adf{json="{\"attrs\":{\"localId\":\"01a0a067-68d2-787e-afc5-2459776aa029\"},\"text\":\"the owner\",\"type\":\"text\"}"}
 
 :adf{json="{\"attrs\":{\"localId\":\"01a0a067-68d5-7372-9962-29a039654056\"},\"text\":\"One \",\"type\":\"text\"}"}:adf{json="{\"attrs\":{\"localId\":\"01a0a067-68d5-7372-9962-29a039654056\"},\"text\":\"anchor\",\"type\":\"text\"}"}
-
-:adf{json="{\"attrs\":{\"localId\":\"01a0a067-68cf-78af-abd6-c660ec0d189b\"},\"text\":\"Two \",\"type\":\"text\"}"}:adf{json="{\"attrs\":{\"localId\":\"01a0a067-68d9-73fa-9b9a-caa42061993c\"},\"text\":\"anchors\",\"type\":\"text\"}"}
diff --git a/src/adf/document.ts b/src/adf/document.ts
index dfd6b21..bedca8c 100644
--- a/src/adf/document.ts
+++ b/src/adf/document.ts
@@ -72,7 +72,7 @@ export function isAdfMark(value: unknown): value is AdfMark {
   return !('attrs' in value) || isAttributes(value['attrs'])
 }
 
-export function nodeAttrs(node: { attrs?: AdfAttributes }): AdfAttributes {
+export function nodeAttrs(node: { attrs?: AdfAttributes }): Readonly<AdfAttributes> {
   return node.attrs ?? {}
 }
 
diff --git a/src/adf/editor-normal.test.ts b/src/adf/editor-normal.test.ts
index eaefc83..f640a48 100644
--- a/src/adf/editor-normal.test.ts
+++ b/src/adf/editor-normal.test.ts
@@ -14,6 +14,7 @@ test('merges adjacent text nodes carrying identical marks, at every level', () =
     { text: 'e', type: 'text' },
     { attrs: { localId: '01a0a06b-5281-7f27-9022-8d3a74b0ab0d' }, text: 'f', type: 'text' },
     { text: 'g', type: 'text' },
+    { attrs: {}, text: 'h', type: 'text' },
   ]
   assert.deepEqual(toEditorNormal({ content: [{ attrs: { panelType: 'info' }, content: [{ content, type: 'paragraph' }], type: 'panel' }], type: 'doc', version: 1 }), {
     content: [
@@ -27,7 +28,7 @@ test('merges adjacent text nodes carrying identical marks, at every level', () =
               { type: 'hardBreak' },
               { text: 'e', type: 'text' },
               { attrs: { localId: '01a0a06b-5281-7f27-9022-8d3a74b0ab0d' }, text: 'f', type: 'text' },
-              { text: 'g', type: 'text' },
+              { text: 'gh', type: 'text' },
             ],
             type: 'paragraph',
           },
diff --git a/src/adf/editor-normal.ts b/src/adf/editor-normal.ts
index b6514f1..fe74067 100644
--- a/src/adf/editor-normal.ts
+++ b/src/adf/editor-normal.ts
@@ -11,7 +11,6 @@ export function sameMark(candidate: AdfMark, mark: AdfMark): boolean {
   return markKey(candidate) === markKey(mark)
 }
 
-// AGENTS.md §2: adjacent text nodes carrying identical marks and no attributes are one node.
 export function mergeAdjacentText(nodes: readonly AdfNode[]): AdfNode[] {
   const merged: AdfNode[] = []
   for (const node of nodes) {
diff --git a/src/corpus.test.ts b/src/corpus.test.ts
index ae36632..31a7f1d 100644
--- a/src/corpus.test.ts
+++ b/src/corpus.test.ts
@@ -96,7 +96,7 @@ for (const directory of roundTripDirectories) {
       assert.ok(isAdfDocument(expected), `${name}.json is not an ADF document`)
       const result = markdownToAdf(readFileSync(join(roundTripRoot, directory, `${name}.md`), 'utf8'))
       assert.ok(result.ok, result.ok ? '' : `${result.error.code}: ${result.error.message}`)
-      assert.deepEqual(toEditorNormal(result.value), toEditorNormal(expected))
+      assert.deepEqual(toEditorNormal(result.value), expected)
     })
   }
 }
@@ -185,12 +185,12 @@ for (const name of pairedNames(normalizationRoot, '.md', '.json')) {
     assert.ok(isAdfDocument(expected), `${name}.json is not an ADF document`)
     const result = markdownToAdf(readFileSync(join(normalizationRoot, `${name}.md`), 'utf8'))
     assert.ok(result.ok, result.ok ? '' : `${result.error.code}: ${result.error.message}`)
-    assert.deepEqual(toEditorNormal(result.value), toEditorNormal(expected))
+    assert.deepEqual(toEditorNormal(result.value), expected)
     const emitted = adfToMarkdown(result.value)
     assert.ok(emitted.ok, emitted.ok ? '' : `${emitted.error.code}: ${emitted.error.message}`)
     const again = markdownToAdf(emitted.value)
     assert.ok(again.ok, again.ok ? '' : `${again.error.code}: ${again.error.message}`)
-    assert.deepEqual(toEditorNormal(again.value), toEditorNormal(expected))
+    assert.deepEqual(toEditorNormal(again.value), expected)
   })
 }
 
diff --git a/src/markdown/emit/adf-to-markdown.test.ts b/src/markdown/emit/adf-to-markdown.test.ts
index 4f53351..5995088 100644
--- a/src/markdown/emit/adf-to-markdown.test.ts
+++ b/src/markdown/emit/adf-to-markdown.test.ts
@@ -356,7 +356,7 @@ test('refuses marks and attributes nested deeper than the emitter carries', () =
     assert.ok(spelled.ok, spelled.ok ? '' : spelled.error.message)
     const read = markdownToAdf(spelled.value)
     assert.ok(read.ok, read.ok ? '' : read.error.message)
-    assert.deepEqual(toEditorNormal(read.value), toEditorNormal(document(node)))
+    assert.deepEqual(toEditorNormal(read.value), document(node))
   }
 
   assert.equal(markdown(adfToMarkdown(document(paragraph({ marks: [{ attrs, type: 'em' }], text: 'x', type: 'text' })))), deeper('depth', 'em', largestNesting - 3))