fix: special chars in property

src/languageservice/services/yamlCompletion.ts

@@ -1669,7 +1669,10 @@ export class YamlCompletion {
  * escape $, \ and }
  */
 function getInsertTextForPlainText(text: string): string {
-  return text.replace(/[\\$}]/g, '\\$&'); //
+  return text.replace(/(\\?)([\\$}])/g, (match, escapeChar, specialChar) => {
+    // If it's already escaped (has a backslash before it), return it as is
+    return escapeChar ? match : `\\${specialChar}`;
+  });
 }
 
 const isNumberExp = /^\d+$/;

test/autoCompletion.test.ts

@@ -959,6 +959,21 @@ describe('Auto Completion Tests', () => {
         expect(completion.items.map((i) => i.insertText)).to.deep.equal(['car:\n  engine: ${1:type\\$1234}']);
       });
 
+      it('Autocompletion should escape $ in property', async () => {
+        schemaProvider.addSchema(SCHEMA_ID, {
+          type: 'object',
+          properties: {
+            $prop$1: {
+              type: 'string',
+            },
+          },
+          required: ['$prop$1'],
+        });
+        const content = '';
+        const completion = await parseSetup(content, 0);
+        expect(completion.items.map((i) => i.insertText)).includes('\\$prop\\$1: ');
+      });
+
       it('Autocompletion should escape colon when indicating map', async () => {
         schemaProvider.addSchema(SCHEMA_ID, {
           type: 'object',

test/schemaValidation.test.ts

@@ -1289,7 +1289,7 @@ obj:
           4,
           18,
           DiagnosticSeverity.Error,
-          'yaml-schema: Package',
+          'yaml-schema: Composer Package',
           'https://raw.githubusercontent.com/composer/composer/master/res/composer-schema.json'
         )
       );