fix(observer): routing-detector ignorit PASTED-citaty /node (P1 E/G, 4-y FP-klass)

Novyy uzkiy stripPastedContext (fenced+blockquote only) pered detekciey. NE reuse stripQuotedContext (tot stripaet inline - FN). Sohraneno FP-smeshchenie routingGate (SE-1). Regressiya 3185 passed.

tools/observer-routing-detector.mjs

@@ -35,11 +35,27 @@ export function loadKnownNodes(path = KNOWN_NODES_PATH) {
   return out;
 }
 
+/**
+ * Снять ТОЛЬКО PASTED-контекст: fenced-блоки и markdown-blockquote-строки.
+ * НАМЕРЕННО НЕ трогает inline-backticks/кавычки/guillemets — в отличие от
+ * stripQuotedContext (tools/enforce-rationalization-audit.mjs), у которого
+ * ПРОТИВОПОЛОЖНОЕ безопасное направление (FN-safe). Здесь гейт routingGate
+ * FP-safe: inline-форма `/x` должна оставаться директивой (over-detection
+ * дешевле тихой потери governance-сигнала; sharp-edges SE-1).
+ */
+export function stripPastedContext(text) {
+  if (typeof text !== 'string') return '';
+  let s = text;
+  s = s.replace(/```[\s\S]*?```/g, ' ');            // fenced blocks
+  s = s.replace(/^[ \t]*(?:>|>).*$/gm, ' ');      // markdown blockquote lines
+  return s;
+}
+
 /**
  * @returns {{directed: boolean, node: string|null}}
  */
 export function detectMethodDirected(promptText, knownNodes) {
-  const text = String(promptText || '').toLowerCase();
+  const text = stripPastedContext(String(promptText || '')).toLowerCase();
   for (const node of knownNodes || []) {
     const n = String(node).toLowerCase();
     if (!n) continue;

tools/observer-routing-detector.test.mjs

@@ -48,3 +48,37 @@ describe('loadKnownNodes', () => {
     expect(loadKnownNodes('tools/does-not-exist.txt')).toEqual([]);
   });
 });
+
+import { stripPastedContext } from './observer-routing-detector.mjs';
+
+describe('stripPastedContext (узкий: fenced + blockquote)', () => {
+  it('removes fenced blocks', () => {
+    expect(stripPastedContext('a\n```\n/x here\n```\nb')).not.toContain('/x');
+  });
+  it('removes blockquote lines', () => {
+    expect(stripPastedContext('> /x cited\nkeep')).not.toContain('/x');
+  });
+  it('keeps inline backticks (FP-safe bias)', () => {
+    expect(stripPastedContext('use `/x` now')).toContain('/x');
+  });
+  it('is non-string safe', () => {
+    expect(stripPastedContext(null)).toBe('');
+  });
+});
+
+describe('detectMethodDirected — PASTED-context guard (4-й FP-класс)', () => {
+  it('does NOT flag a /node inside a fenced code block', () => {
+    const t = 'смотри лог:\n```\nуже использовал /brainstorming тут\n```\nчто думаешь?';
+    expect(detectMethodDirected(t, NODES).directed).toBe(false);
+  });
+  it('does NOT flag a blockquote-cited directive', () => {
+    const t = '> используй systematic-debugging здесь\nэто цитата из старого чата';
+    expect(detectMethodDirected(t, NODES).directed).toBe(false);
+  });
+  it('STILL flags an inline /slash directive (FP-safe bias preserved)', () => {
+    expect(detectMethodDirected('сделай через `/brainstorming`', NODES).directed).toBe(true);
+  });
+  it('STILL flags a plain-prose directive', () => {
+    expect(detectMethodDirected('запусти discovery-interview', NODES).directed).toBe(true);
+  });
+});