diff --git a/expressions/src/completion.ts b/expressions/src/completion.ts
index 4ebafc3..b7cb252 100644
--- a/expressions/src/completion.ts
+++ b/expressions/src/completion.ts
@@ -2,6 +2,7 @@ import {DescriptionPair} from "./completion/descriptionDictionary.js";
 import {Dictionary, isDictionary} from "./data/dictionary.js";
 import {ExpressionData} from "./data/expressiondata.js";
 import {Evaluator} from "./evaluator.js";
+import {FeatureFlags} from "./features.js";
 import {wellKnownFunctions} from "./funcs.js";
 import {FunctionDefinition, FunctionInfo} from "./funcs/info.js";
 import {Lexer, Token, TokenType} from "./lexer.js";
@@ -26,13 +27,16 @@ export type CompletionItem = {
  * @param context Context available for the expression
  * @param extensionFunctions List of functions available
  * @param functions Optional map of functions to use during evaluation
+ * @param featureFlags Optional feature flags to control which features are enabled
  * @returns Array of completion items
  */
 export function complete(
   input: string,
   context: Dictionary,
   extensionFunctions: FunctionInfo[],
-  functions?: Map<string, FunctionDefinition>
+  functions?: Map<string, FunctionDefinition>,
+  // eslint-disable-next-line @typescript-eslint/no-unused-vars
+  featureFlags?: FeatureFlags
 ): CompletionItem[] {
   // Lex
   const lexer = new Lexer(input);
diff --git a/languageservice/src/complete.ts b/languageservice/src/complete.ts
index f051e5d..32c2e5e 100644
--- a/languageservice/src/complete.ts
+++ b/languageservice/src/complete.ts
@@ -141,7 +141,7 @@ export async function complete(
       func.description = getFunctionDescription(func.name);
     }
 
-    return getExpressionCompletionItems(token, context, extensionFunctions, newPos);
+    return getExpressionCompletionItems(token, context, extensionFunctions, newPos, config?.featureFlags);
   }
 
   const indentation = guessIndentation(newDoc, 2, true); // Use 2 spaces as default and most common for YAML
@@ -531,7 +531,8 @@ function getExpressionCompletionItems(
   token: TemplateToken,
   context: DescriptionDictionary,
   extensionFunctions: FunctionInfo[],
-  pos: Position
+  pos: Position,
+  featureFlags?: FeatureFlags
 ): CompletionItem[] {
   if (!token.range) {
     return [];
@@ -550,8 +551,8 @@ function getExpressionCompletionItems(
   const expressionInput = (getExpressionInput(currentInput, cursorOffset) || "").trim();
 
   try {
-    return completeExpression(expressionInput, context, extensionFunctions, validatorFunctions).map(item =>
-      mapExpressionCompletionItem(item, currentInput[cursorOffset])
+    return completeExpression(expressionInput, context, extensionFunctions, validatorFunctions, featureFlags).map(
+      item => mapExpressionCompletionItem(item, currentInput[cursorOffset])
     );
   } catch (e) {
     error(`Error while completing expression: '${(e as Error)?.message || "<no details>"}'`);