diff --git a/test/helpers/auq-sdk-capture.ts b/test/helpers/auq-sdk-capture.ts
index 6fa716d19..765623558 100644
--- a/test/helpers/auq-sdk-capture.ts
+++ b/test/helpers/auq-sdk-capture.ts
@@ -228,9 +228,11 @@ export function hasDisabledOutsideReview(output: string): boolean {
 
 /**
  * Sections a capture loaded: a Read of the section file, or a Bash print of it
- * (cat/sed ranges, as in run 36776104571) whose outputs together contain every
- * line of the section as it stood before the run. A command without that
- * printed content, such as head or grep, is not a read.
+ * (cat/sed ranges, as in run 36776104571; byte ranges such as head -c/tail -c,
+ * as in census 37178143007) whose outputs together contain every line of the
+ * section as it stood before the run. Byte ranges split lines at their edges,
+ * so consecutive outputs are also joined on their overlap. A command without
+ * that printed content, such as head or grep, is not a read.
  */
 export function detectSectionReads(toolCalls: SkillTestResult['toolCalls'], sections: Map<string, string>): Set<string> {
   const readSections = new Set<string>();
@@ -242,9 +244,14 @@ export function detectSectionReads(toolCalls: SkillTestResult['toolCalls'], sect
   }
   for (const [name, content] of sections) {
     const lines = content.split('\n').map(line => line.trimEnd()).filter(Boolean);
-    const printed = new Set(toolCalls.filter(c => c.tool === 'Bash' && String(c.input?.command ?? '').includes(`sections/${name}`))
-      .flatMap(c => c.output.split('\n').map(line => line.trimEnd())));
-    if (lines.length && lines.every(line => printed.has(line))) readSections.add(name);
+    const outputs = toolCalls.filter(c => c.tool === 'Bash' && String(c.input?.command ?? '').includes(`sections/${name}`)).map(c => c.output);
+    const printed = new Set(outputs.flatMap(output => output.split('\n').map(line => line.trimEnd())));
+    const joined = outputs.reduce((text, next) => {
+      let overlap = Math.min(text.length, next.length, 256);
+      while (overlap > 0 && !text.endsWith(next.slice(0, overlap))) overlap--;
+      return text + next.slice(overlap);
+    }, '');
+    if (lines.length && lines.every(line => printed.has(line) || joined.includes(line))) readSections.add(name);
   }
   return readSections;
 }
diff --git a/test/section-capture-native-tools.test.ts b/test/section-capture-native-tools.test.ts
index 1ec7b464b..a6a3b2429 100644
--- a/test/section-capture-native-tools.test.ts
+++ b/test/section-capture-native-tools.test.ts
@@ -498,3 +498,24 @@ test('section detection credits a complete Bash print of the section, never a pa
   expect(read(ranges.map(call => ({ ...call, tool: 'Grep' })))).toEqual([]);
   expect(read([{ tool: 'Read', input: { file_path: '/fixture/plan-ceo-review/sections/review-sections.md' }, output: '' }])).toEqual(['review-sections.md']);
 });
+
+// Census 37178143007: the agent printed the section in byte ranges that split
+// lines at their edges (head -c, then tail -c +N | head -c, one-byte overlaps).
+test('section detection credits complete byte-range prints and still refuses a gap', async () => {
+  const { detectSectionReads } = await import('./helpers/auq-sdk-capture');
+  const file = path.resolve(import.meta.dir, '..', 'plan-ceo-review/sections/review-sections.md');
+  const content = fs.readFileSync(file, 'utf-8'), bytes = Buffer.from(content);
+  const sections = new Map([['review-sections.md', content]]);
+  const chunk = (command: string, from: number, length?: number) => ({ tool: 'Bash', input: { command },
+    output: bytes.subarray(from, length === undefined ? undefined : from + length).toString('utf8') });
+  const calls = [
+    chunk('wc -c plan-ceo-review/sections/review-sections.md && head -c 16000 plan-ceo-review/sections/review-sections.md', 0, 16000),
+    ...[16000, 33000, 50000].map(start => chunk(`tail -c +${start} plan-ceo-review/sections/review-sections.md | head -c 17000`, start - 1, 17000)),
+    chunk('tail -c +67000 plan-ceo-review/sections/review-sections.md', 66999),
+  ];
+  const read = (list: typeof calls) => [...detectSectionReads(list, sections)];
+  expect(bytes.length).toBeGreaterThan(67000);
+  expect(read(calls)).toEqual(['review-sections.md']);
+  expect(read(calls.filter((_, i) => i !== 2))).toEqual([]);
+  expect(read(calls.slice(0, -1))).toEqual([]);
+});