feat(optimization): finalized iterative-surgical optimization suite (checkpoint)

scripts/optimization/optimize.test.ts

@@ -0,0 +1,37 @@
+/**
+ * @license
+ * Copyright 2026 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect, vi } from 'vitest';
+import { maskVariables, unmaskVariables } from './masking.js';
+
+vi.mock('node:fs');
+
+describe('Optimization Pipeline Infrastructure', () => {
+  // --- Masking Tests ---
+  describe('Masking Utility', () => {
+    it('should mask unique template variables and restore them', () => {
+      const input =
+        'Use ${TOOL_A} to read ${FILE_PATH}. ${TOOL_A} is efficient.';
+      const { maskedText, maskMap } = maskVariables(input);
+
+      expect(maskedText).toContain('[[GCLI_VAR_0]]');
+      expect(maskedText).not.toContain('${TOOL_A}');
+
+      const restored = unmaskVariables(maskedText, maskMap);
+      expect(restored).toBe(input);
+    });
+
+    it('should handle text with no variables', () => {
+      const input = 'Static text.';
+      const { maskedText, maskMap } = maskVariables(input);
+      expect(maskedText).toBe(input);
+      expect(Object.keys(maskMap).length).toBe(0);
+    });
+  });
+
+  // Note: Extraction tests remain in extract.test.ts
+  // Optimization logic is verified via dry runs and Pareto frontier outputs.
+});