fix(@angular/cli): correct frontmatter parsing in MCP examples tool

This commit fixes a bug in the YAML frontmatter parsing logic that caused string values in arrays to be double-quoted. The issue was present in both the `find_examples` MCP tool's runtime parser and the `example_db_generator.js` script.

The `parseFrontmatter` function in both files has been updated to correctly unquote string values, ensuring that the structured data in the examples database is clean and the tool's output is formatted correctly.

Author: clydin

packages/angular/cli/src/commands/mcp/tools/examples.ts

@@ -546,7 +546,15 @@ function parseFrontmatter(content: string): Record<string, unknown> {
     } else {
       const arrayItemMatch = line.match(/^\s*-\s*(.*)/);
       if (arrayItemMatch && currentKey && isArray) {
-        arrayValues.push(arrayItemMatch[1].trim());
+        let value = arrayItemMatch[1].trim();
+        // Unquote if the value is quoted.
+        if (
+          (value.startsWith("'") && value.endsWith("'")) ||
+          (value.startsWith('"') && value.endsWith('"'))
+        ) {
+          value = value.slice(1, -1);
+        }
+        arrayValues.push(value);
       }
     }
   }

tools/example_db_generator.js

@@ -60,7 +60,15 @@ function parseFrontmatter(content) {
     } else {
       const arrayItemMatch = line.match(/^\s*-\s*(.*)/);
       if (arrayItemMatch && currentKey && isArray) {
-        arrayValues.push(arrayItemMatch[1].trim());
+        let value = arrayItemMatch[1].trim();
+        // Unquote if the value is quoted.
+        if (
+          (value.startsWith("'") && value.endsWith("'")) ||
+          (value.startsWith('"') && value.endsWith('"'))
+        ) {
+          value = value.slice(1, -1);
+        }
+        arrayValues.push(value);
       }
     }
   }