no, annotation processor are bad

build.sbt

@@ -1201,16 +1201,16 @@ lazy val buildTool = crossProject(JVMPlatform)
     )
   )
 
-lazy val eval = crossProject(JSPlatform, JVMPlatform, NativePlatform)
+lazy val interpreter = crossProject(JSPlatform, JVMPlatform, NativePlatform)
   .withoutSuffixFor(JVMPlatform)
   .crossType(CrossType.Full)
-  .in(file("eval"))
+  .in(file("interpreter"))
   .dependsOn(platform)
   .settings(commonSettings)
   // https://github.com/b-studios/scala-graal-truffle-example/blob/c2747a6eece156f878c5b934116aaa00a2cd6311/build.sbt
   .settings(
-    name := "eval",
-    assembly / assemblyOutputPath := file("target") / "chester-eval.jar"
+    name := "interpreter",
+    assembly / assemblyOutputPath := file("target") / "chester-interpreter.jar"
   )
   .jvmSettings(
     assembly / test := {},
@@ -1282,7 +1282,7 @@ lazy val root = crossProject(JSPlatform, JVMPlatform, NativePlatform)
     lsp,
     buildProtocol,
     buildTool,
-    eval,
+    interpreter,
     js,
     site,
     docs

interpreter/jvm/src/main/scala/chester/truffle/index.scala

@@ -0,0 +1,16 @@
+package chester.truffle
+
+import com.oracle.truffle.api.{CallTarget, TruffleLanguage}
+import com.oracle.truffle.api.TruffleLanguage.{Env, ParsingRequest}
+
+trait ChesterContext
+
+@TruffleLanguage.Registration(id = "cst", name = "Chester")
+class ChesterLang extends TruffleLanguage[ChesterContext] {
+  @throws[Exception]
+  override protected def parse(request: ParsingRequest): CallTarget = {
+    ???
+  }
+
+  override protected def createContext(env: Env): ChesterContext = null
+}

interpreter/references.md

@@ -0,0 +1,3 @@
+https://github.com/skinny85/graalvm-truffle-tutorial/blob/master/part-15/src/main/java/com/endoflineblog/truffle/part_15/EasyScriptTruffleLanguage.java
+
+https://www.endoflineblog.com/graal-truffle-tutorial-part-0-what-is-truffle