feat(sdk): strip blockquote-prefixed lines before UAT item scan (#3184)

Cycle 8 of ~15: adds blockquote-line stripping pass. Quoted
documentation snippets no longer pollute the item roster.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

sdk/src/query/phase-uat-passed.test.ts

@@ -197,6 +197,38 @@ expected: blah
 result: pass
 -->
 
+### 1. Real item
+expected: real
+result: pass
+`;
+      await writeFile(join(phaseDir, '05-HUMAN-UAT.md'), content);
+
+      const result = await isPhaseUatPassed(localTmp, '5');
+      expect(result.items.length).toBe(1);
+      expect(result.items[0].name).toBe('Real item');
+      expect(result.passed).toBe(true);
+    } finally {
+      await rm(localTmp, { recursive: true, force: true });
+    }
+  });
+
+  it('ignores ### item content on blockquote-prefixed lines', async () => {
+    const localTmp = await mkdtemp(join(tmpdir(), 'gsd-uat-c8-'));
+    try {
+      const phaseDir = join(localTmp, '.planning', 'phases', '05-blockquote-injection');
+      await mkdir(phaseDir, { recursive: true });
+      const content = `---
+status: complete
+phase: 5
+source: roadmap
+started: 2026-05-18T00:00:00Z
+updated: 2026-05-18T00:00:00Z
+---
+
+> ### 1. Quoted item
+expected: blah
+result: pass
+
 ### 1. Real item
 expected: real
 result: pass

sdk/src/query/phase-uat-passed.ts

@@ -47,6 +47,8 @@ function stripMarkdownInjection(content: string): string {
   s = s.replace(/```[\s\S]*?```/g, '');
   // Pass 3: strip HTML comment regions (<!-- ... -->)
   s = s.replace(/<!--[\s\S]*?-->/g, '');
+  // Pass 4: strip blockquote-prefixed lines (any line starting with optional whitespace + >)
+  s = s.replace(/^\s*>.*$/gm, '');
   return s;
 }