Workaround https://github.com/HaxeFoundation/haxe/issues/9853

src/tink/MacroApi.hx

@@ -54,9 +54,16 @@ class MacroApi {
 
   static public var completionPoint(default, null):Option<{
     var file(default, never):String;
+    var content(default, never):Null<String>;
     var pos(default, never):Int;
   }>;
 
+  static public function getBuildFields():Option<Array<haxe.macro.Expr.Field>>
+    return switch completionPoint {
+      case Some(v) if (v.content != null && (v.content.charAt(v.pos - 1) == '@' || (v.content.charAt(v.pos - 1) == ':' && v.content.charAt(v.pos - 2) == '@'))): None;
+      default: Some(haxe.macro.Context.getBuildFields());
+    }
+
   static public var args(default, null):Iterable<String>;
   static var initialized = initArgs();
 
@@ -73,12 +80,15 @@ class MacroApi {
             params:{
               file:String,
               offset:Int,
+              contents:String,
             }
           } = haxe.Json.parse(arg);
+
           switch payload {
             case { jsonrpc: '2.0', method: 'display/completion' }:
               Some({
                 file: payload.params.file,
+                content: payload.params.contents,
                 pos: payload.params.offset,
               });
             default: None;

src/tink/macro/ClassBuilder.hx

@@ -23,7 +23,10 @@ class ClassBuilder {
       target = Context.getLocalClass().get();
 
     if (fields == null)
-      fields = Context.getBuildFields();
+      switch MacroApi.getBuildFields() {
+        case None: target.pos.error('Impossible to get builds fields now. Possible cause: https://github.com/HaxeFoundation/haxe/issues/9853');
+        case Some(_):
+      }
 
     this.initializeFrom = fields;
     this.target = target;
@@ -192,10 +195,14 @@ class ClassBuilder {
     return m;
   }
 
-  static public function run(plugins:Array<ClassBuilder->Void>, ?verbose) {
-    var builder = new ClassBuilder();
-    for (p in plugins)
-      p(builder);
-    return builder.export(verbose);
-  }
+  static public function run(plugins:Array<ClassBuilder->Void>, ?verbose)
+    return switch MacroApi.getBuildFields() {
+      case None: null;
+      case Some(fields):
+        var builder = new ClassBuilder(fields);
+        for (p in plugins)
+          p(builder);
+        return builder.export(verbose);
+
+    }
 }