Json Schema for LLMs

ASTPlayground/MainForm.pas

@@ -288,7 +288,7 @@ begin
     CompilerStageBox.BringToFront;
     ClearButtonClick(Self);
 
-    Memo1.Lines.Add(TAstSchema.GenerateFullSystemPrompt);
+    Memo1.Lines.Add(TAstSchema.GenerateFullSystemPrompt(FEnvironment.RootScope));
 end;
 
 procedure TForm1.ShowVizualization;
@@ -743,45 +743,52 @@ end;
 procedure TForm1.FromJSONButtonClick(Sender: TObject);
 var
     jsonString: string;
-    jsonObj: TJSONObject;
+    jsonValue: TJSONValue;
     converter: IJsonAstConverter;
 begin
     Memo1.Lines.BeginUpdate;
     try
         jsonString := Memo1.Lines.Text;
-        Memo1.Lines.Clear;
-
         if jsonString.IsEmpty then
         begin
+            Memo1.Lines.Clear;
             Memo1.Lines.Add('Memo is empty. Please paste an AST JSON string.');
             exit;
         end;
 
         try
             converter := TJsonAstConverter.Create;
-            jsonObj := TJSONObject.ParseJSONValue(jsonString) as TJSONObject;
-            if not Assigned(jsonObj) then
-                raise Exception.Create('Invalid JSON format.');
+            // TJSONValue.ParseJSONValue ist der korrekte Einstiegspunkt
+            jsonValue := TJSONValue.ParseJSONValue(jsonString);
+
+            if not Assigned(jsonValue) then
+                raise Exception.Create('Invalid JSON syntax.');
 
             try
-                FCurrUnboundAst := converter.Deserialize(jsonObj);
+                if not (jsonValue is TJSONArray) then
+                    raise Exception.Create('AST Root must be a JSON Array.');
 
-                // Run the full pipeline via environment
+                FCurrUnboundAst := converter.Deserialize(jsonValue);
+
+                // Die Pipeline nutzt den Environment-Helper (Managed Record)
+                // Compile akzeptiert IAstNode und erzeugt intern ein Lambda
                 FCurrCompiled := FEnvironment.Compile(FCurrUnboundAst);
                 FCurrExec := FEnvironment.Link(FCurrCompiled);
 
+                Memo1.Lines.Clear;
                 Memo1.Lines.Add('AST deserialized and bound successfully from JSON.');
                 Memo1.Lines.Add('You can now visualize it (Middle Mouse Click) or pretty-print it.');
             finally
-                jsonObj.Free;
+                jsonValue.Free;
             end;
         except
             on E: Exception do
             begin
+                Memo1.Lines.Clear;
                 Memo1.Lines.Add('Error deserializing AST from JSON:');
                 Memo1.Lines.Add(E.Message);
                 Memo1.Lines.Add('--- Original JSON ---');
-                Memo1.Lines.Text := Memo1.Lines.Text + sLineBreak + jsonString;
+                Memo1.Lines.Add(jsonString);
             end;
         end;
     finally

Src/AST/Myc.Ast.Attributes.pas

@@ -0,0 +1,113 @@
+unit Myc.Ast.Attributes;
+
+interface
+
+uses
+    system.sysutils;
+
+type
+    { Defines the content type for the LLM schema generation. }
+    TFieldKind = (
+        fkNode, // IAstNode (recursive structure)
+        fkTuple, // ITupleNode (explicit ["Tuple", [...]] structure)
+        fkString, // Raw String (for identifiers/names)
+        fkValue, // TDataValue (primitive constants like number, string, boolean)
+        fkNullableNode, // Optional Node (emits 'AstNode | null' in TypeScript)
+        fkArrayOfPairs // Special structure for CondExpr: [[Cond, Branch], ...]
+    );
+
+    { AstTagAttribute: Defines the JSON Tag for an AST Node. }
+    AstTagAttribute = class(TCustomAttribute)
+    private
+        FTag: string;
+    public
+        constructor Create(const ATag: string);
+        property Tag: string read FTag;
+    end;
+
+    { AstFieldAttribute: Defines a field within the JSON Array. }
+    AstFieldAttribute = class(TCustomAttribute)
+    private
+        FName: string;
+        FKind: TFieldKind;
+        FIndex: Integer;
+    public
+        constructor Create(AIndex: Integer; const AName: string; AKind: TFieldKind);
+        property Index: Integer read FIndex;
+        property Name: string read FName;
+        property Kind: TFieldKind read FKind;
+    end;
+
+    { AstDocAttribute: Provides semantic documentation for the LLM. }
+    AstDocAttribute = class(TCustomAttribute)
+    private
+        FDescription: string;
+    public
+        constructor Create(const ADescription: string);
+        property Description: string read FDescription;
+    end;
+
+    { AstScriptExampleAttribute: Provides an example in script syntax.
+      The generator converts this to JSON AST for the LLM prompt. }
+    AstScriptExampleAttribute = class(TCustomAttribute)
+    private
+        FScript: string;
+    public
+        constructor Create(const AScript: string);
+        property Script: string read FScript;
+    end;
+
+    { AstSignatureAttribute: Defines a specific overload signature for an RTL function. }
+    AstSignatureAttribute = class(TCustomAttribute)
+    private
+        FSignature: string;
+    public
+        constructor Create(const ASignature: string);
+        property Signature: string read FSignature;
+    end;
+
+implementation
+
+{ AstTagAttribute }
+
+constructor AstTagAttribute.Create(const ATag: string);
+begin
+    inherited Create;
+    FTag := ATag;
+end;
+
+{ AstFieldAttribute }
+
+constructor AstFieldAttribute.Create(AIndex: Integer; const AName: string; AKind: TFieldKind);
+begin
+    inherited Create;
+    FIndex := AIndex;
+    FName := AName;
+    FKind := AKind;
+end;
+
+{ AstDocAttribute }
+
+constructor AstDocAttribute.Create(const ADescription: string);
+begin
+    inherited Create;
+    FDescription := ADescription;
+end;
+
+{ AstScriptExampleAttribute }
+
+constructor AstScriptExampleAttribute.Create(const AScript: string);
+begin
+    inherited Create;
+    FScript := AScript;
+end;
+
+{ AstSignatureAttribute }
+
+constructor AstSignatureAttribute.Create(const ASignature: string);
+begin
+    inherited Create;
+    FSignature := ASignature;
+end;
+
+end.

Src/AST/Myc.Ast.JSON.pas

@@ -1,14 +1,11 @@
-//==================================================================================================
-//== FULL UNIT START: Myc.Ast.Json (from Myc.Ast.Json.pas)
-//==================================================================================================
 unit Myc.Ast.Json;
 
 interface
 
 uses
-    System.SysUtils,
-    System.Generics.Collections,
-    System.JSON,
+    system.sysutils,
+    system.generics.collections,
+    system.json,
     Myc.Data.Scalar,
     Myc.Data.Value,
     Myc.Ast,
@@ -21,19 +18,16 @@ type
         function Deserialize(const AJson: TJSONValue): IAstNode;
     end;
 
-    // Compact JSON Converter: [Kind, Arg1, Arg2, ...]
+    { Compact JSON Converter: [Tag, Arg1, Arg2, ...] }
     TJsonAstConverter = class(TAstVisitor<TJSONValue>, IJsonAstConverter)
     private
-        // Helpers for compact data values
         function DataValueToJson(const AValue: TDataValue): TJSONValue;
         function JsonToDataValue(const AJson: TJSONValue): TDataValue;
 
-        // Deserialization Dispatcher
         function JsonToNode(const AJson: TJSONValue): IAstNode;
         function JsonToTuple(const AArray: TJSONArray): ITupleNode;
 
     strict private
-        // Serialization Visitors (Array Builders)
         function VisitConstant(const Node: IAstNode): TJSONValue;
         function VisitIdentifier(const Node: IAstNode): TJSONValue;
         function VisitKeyword(const Node: IAstNode): TJSONValue;
@@ -42,16 +36,16 @@ type
         function VisitIfExpression(const Node: IAstNode): TJSONValue;
         function VisitCondExpression(const Node: IAstNode): TJSONValue;
         function VisitLambdaExpression(const Node: IAstNode): TJSONValue;
-        function VisitMacroDefinition(const Node: IAstNode): TJSONValue;
-        function VisitQuasiquote(const Node: IAstNode): TJSONValue;
-        function VisitUnquote(const Node: IAstNode): TJSONValue;
-        function VisitUnquoteSplicing(const Node: IAstNode): TJSONValue;
         function VisitFunctionCall(const Node: IAstNode): TJSONValue;
         function VisitMacroExpansionNode(const Node: IAstNode): TJSONValue;
         function VisitRecurNode(const Node: IAstNode): TJSONValue;
         function VisitBlockExpression(const Node: IAstNode): TJSONValue;
         function VisitVariableDeclaration(const Node: IAstNode): TJSONValue;
         function VisitAssignment(const Node: IAstNode): TJSONValue;
+        function VisitMacroDefinition(const Node: IAstNode): TJSONValue;
+        function VisitQuasiquote(const Node: IAstNode): TJSONValue;
+        function VisitUnquote(const Node: IAstNode): TJSONValue;
+        function VisitUnquoteSplicing(const Node: IAstNode): TJSONValue;
         function VisitIndexer(const Node: IAstNode): TJSONValue;
         function VisitMemberAccess(const Node: IAstNode): TJSONValue;
         function VisitRecordLiteral(const Node: IAstNode): TJSONValue;
@@ -125,31 +119,7 @@ begin
     Result := JsonToNode(AJson);
 end;
 
-// --- Serialization (AST -> JSON Array) ---
-
-function TJsonAstConverter.VisitIdentifier(const Node: IAstNode): TJSONValue;
-begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Id'));
-    arr.AddElement(TJSONString.Create(Node.AsIdentifier.Name));
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitKeyword(const Node: IAstNode): TJSONValue;
-begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Key'));
-    arr.AddElement(TJSONString.Create(Node.AsKeyword.Value.Name));
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitConstant(const Node: IAstNode): TJSONValue;
-begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Const'));
-    arr.AddElement(DataValueToJson(Node.AsConstant.Value));
-    Result := arr;
-end;
+// --- Serialization Helpers ---
 
 function TJsonAstConverter.DataValueToJson(const AValue: TDataValue): TJSONValue;
 begin
@@ -177,97 +147,74 @@ begin
     end;
 end;
 
-function TJsonAstConverter.VisitTuple(const Node: IAstNode): TJSONValue;
+// --- Visitor Implementations ---
+
+function TJsonAstConverter.VisitConstant(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Tuple'));
-    var elems := TJSONArray.Create;
+    arr := TJSONArray.Create;
+    arr.Add('Const');
+    arr.AddElement(DataValueToJson(Node.AsConstant.Value));
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitIdentifier(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+begin
+    arr := TJSONArray.Create;
+    arr.Add('Id');
+    arr.Add(Node.AsIdentifier.Name);
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitKeyword(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+begin
+    arr := TJSONArray.Create;
+    arr.Add('Key');
+    arr.Add(Node.AsKeyword.Value.Name);
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitTuple(const Node: IAstNode): TJSONValue;
+var
+    arr, elems: TJSONArray;
+begin
+    arr := TJSONArray.Create;
+    arr.Add('Tuple');
+    elems := TJSONArray.Create;
     for var item in Node.AsTuple.Elements do
         elems.AddElement(Visit(item));
     arr.AddElement(elems);
     Result := arr;
 end;
 
-function TJsonAstConverter.VisitFunctionCall(const Node: IAstNode): TJSONValue;
+function TJsonAstConverter.VisitRecordField(const Node: IAstNode): TJSONValue;
 var
-    C: IFunctionCallNode;
+    arr: TJSONArray;
 begin
-    C := Node.AsFunctionCall;
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Call'));
-    arr.AddElement(Visit(C.Callee));
-    arr.AddElement(Visit(C.Arguments)); // Arguments is a Tuple
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitBlockExpression(const Node: IAstNode): TJSONValue;
-begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Block'));
-    arr.AddElement(Visit(Node.AsBlockExpression.Expressions)); // Tuple
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitLambdaExpression(const Node: IAstNode): TJSONValue;
-var
-    L: ILambdaExpressionNode;
-begin
-    L := Node.AsLambdaExpression;
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Fn'));
-    arr.AddElement(Visit(L.Parameters)); // Tuple
-    arr.AddElement(Visit(L.Body));
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitMacroDefinition(const Node: IAstNode): TJSONValue;
-var
-    M: IMacroDefinitionNode;
-begin
-    M := Node.AsMacroDefinition;
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Macro'));
-    arr.AddElement(Visit(M.Name));
-    arr.AddElement(Visit(M.Parameters));
-    arr.AddElement(Visit(M.Body));
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitVariableDeclaration(const Node: IAstNode): TJSONValue;
-var
-    V: IVariableDeclarationNode;
-begin
-    V := Node.AsVariableDeclaration;
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Var'));
-    arr.AddElement(Visit(V.Target));
-    if Assigned(V.Initializer) then
-        arr.AddElement(Visit(V.Initializer))
-    else
-        arr.AddElement(TJSONNull.Create);
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitAssignment(const Node: IAstNode): TJSONValue;
-begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Assign'));
-    arr.AddElement(Visit(Node.AsAssignment.Target));
-    arr.AddElement(Visit(Node.AsAssignment.Value));
+    arr := TJSONArray.Create;
+    arr.Add('Field');
+    arr.AddElement(Visit(Node.AsRecordField.Key));
+    arr.AddElement(Visit(Node.AsRecordField.Value));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitIfExpression(const Node: IAstNode): TJSONValue;
 var
-    E: IIfExpressionNode;
+    arr: TJSONArray;
+    n: IIfExpressionNode;
 begin
-    E := Node.AsIfExpression;
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('If'));
-    arr.AddElement(Visit(E.Condition));
-    arr.AddElement(Visit(E.ThenBranch));
-    if Assigned(E.ElseBranch) then
-        arr.AddElement(Visit(E.ElseBranch))
+    n := Node.AsIfExpression;
+    arr := TJSONArray.Create;
+    arr.Add('If');
+    arr.AddElement(Visit(n.Condition));
+    arr.AddElement(Visit(n.ThenBranch));
+    if Assigned(n.ElseBranch) then
+        arr.AddElement(Visit(n.ElseBranch))
     else
         arr.AddElement(TJSONNull.Create);
     Result := arr;
@@ -275,147 +222,248 @@ end;
 
 function TJsonAstConverter.VisitCondExpression(const Node: IAstNode): TJSONValue;
 var
-    E: ICondExpressionNode;
-    pairs: TJSONArray;
+    arr, pairs: TJSONArray;
+    n: ICondExpressionNode;
 begin
-    E := Node.AsCondExpression;
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Cond'));
+    n := Node.AsCondExpression;
+    arr := TJSONArray.Create;
+    arr.Add('Cond');
     pairs := TJSONArray.Create;
-    for var p in E.Pairs do
+    for var p in n.Pairs do
     begin
-        var pArr := TJSONArray.Create;
-        pArr.AddElement(Visit(p.Condition));
-        pArr.AddElement(Visit(p.Branch));
-        pairs.AddElement(pArr);
+        var pairArr := TJSONArray.Create;
+        pairArr.AddElement(Visit(p.Condition));
+        pairArr.AddElement(Visit(p.Branch));
+        pairs.AddElement(pairArr);
     end;
     arr.AddElement(pairs);
-    if Assigned(E.ElseBranch) then
-        arr.AddElement(Visit(E.ElseBranch))
+    if Assigned(n.ElseBranch) then
+        arr.AddElement(Visit(n.ElseBranch))
     else
         arr.AddElement(TJSONNull.Create);
     Result := arr;
 end;
 
-function TJsonAstConverter.VisitQuasiquote(const Node: IAstNode): TJSONValue;
+function TJsonAstConverter.VisitLambdaExpression(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: ILambdaExpressionNode;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Quote'));
+    n := Node.AsLambdaExpression;
+    arr := TJSONArray.Create;
+    arr.Add('Fn');
+    arr.AddElement(Visit(n.Parameters));
+    arr.AddElement(Visit(n.Body));
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitFunctionCall(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IFunctionCallNode;
+begin
+    n := Node.AsFunctionCall;
+    arr := TJSONArray.Create;
+    arr.Add('Call');
+    arr.AddElement(Visit(n.Callee));
+    arr.AddElement(Visit(n.Arguments));
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitMacroExpansionNode(const Node: IAstNode): TJSONValue;
+begin
+    Result := Visit(Node.AsMacroExpansion.CallNode);
+end;
+
+function TJsonAstConverter.VisitBlockExpression(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+begin
+    arr := TJSONArray.Create;
+    arr.Add('Block');
+    arr.AddElement(Visit(Node.AsBlockExpression.Expressions));
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitVariableDeclaration(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IVariableDeclarationNode;
+begin
+    n := Node.AsVariableDeclaration;
+    arr := TJSONArray.Create;
+    arr.Add('Var');
+    arr.AddElement(Visit(n.Target));
+    if Assigned(n.Initializer) then
+        arr.AddElement(Visit(n.Initializer))
+    else
+        arr.AddElement(TJSONNull.Create);
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitAssignment(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IAssignmentNode;
+begin
+    n := Node.AsAssignment;
+    arr := TJSONArray.Create;
+    arr.Add('Assign');
+    arr.AddElement(Visit(n.Target));
+    arr.AddElement(Visit(n.Value));
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitMacroDefinition(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IMacroDefinitionNode;
+begin
+    n := Node.AsMacroDefinition;
+    arr := TJSONArray.Create;
+    arr.Add('Macro');
+    arr.AddElement(Visit(n.Name));
+    arr.AddElement(Visit(n.Parameters));
+    arr.AddElement(Visit(n.Body));
+    Result := arr;
+end;
+
+function TJsonAstConverter.VisitQuasiquote(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+begin
+    arr := TJSONArray.Create;
+    arr.Add('Quote');
     arr.AddElement(Visit(Node.AsQuasiquote.Expression));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitUnquote(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Unquote'));
+    arr := TJSONArray.Create;
+    arr.Add('Unquote');
     arr.AddElement(Visit(Node.AsUnquote.Expression));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitUnquoteSplicing(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Splice'));
+    arr := TJSONArray.Create;
+    arr.Add('Splice');
     arr.AddElement(Visit(Node.AsUnquoteSplicing.Expression));
     Result := arr;
 end;
 
-function TJsonAstConverter.VisitRecurNode(const Node: IAstNode): TJSONValue;
-begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Recur'));
-    arr.AddElement(Visit(Node.AsRecur.Arguments)); // Tuple
-    Result := arr;
-end;
-
 function TJsonAstConverter.VisitIndexer(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IIndexerNode;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Index'));
-    arr.AddElement(Visit(Node.AsIndexer.Base));
-    arr.AddElement(Visit(Node.AsIndexer.Index));
+    n := Node.AsIndexer;
+    arr := TJSONArray.Create;
+    arr.Add('Index');
+    arr.AddElement(Visit(n.Base));
+    arr.AddElement(Visit(n.Index));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitMemberAccess(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IMemberAccessNode;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Member'));
-    arr.AddElement(Visit(Node.AsMemberAccess.Base));
-    arr.AddElement(Visit(Node.AsMemberAccess.Member));
-    Result := arr;
-end;
-
-function TJsonAstConverter.VisitRecordField(const Node: IAstNode): TJSONValue;
-begin
-    // Helper for RecordLiteral
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Field'));
-    arr.AddElement(Visit(Node.AsRecordField.Key));
-    arr.AddElement(Visit(Node.AsRecordField.Value));
+    n := Node.AsMemberAccess;
+    arr := TJSONArray.Create;
+    arr.Add('Member');
+    arr.AddElement(Visit(n.Base));
+    arr.AddElement(Visit(n.Member));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitRecordLiteral(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Record'));
-    arr.AddElement(Visit(Node.AsRecordLiteral.Fields)); // Tuple
+    arr := TJSONArray.Create;
+    arr.Add('Record');
+    arr.AddElement(Visit(Node.AsRecordLiteral.Fields));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitCreateSeries(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Series'));
+    arr := TJSONArray.Create;
+    arr.Add('Series');
     arr.AddElement(Visit(Node.AsCreateSeries.DefinitionNode));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitAddSeriesItem(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IAddSeriesItemNode;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Add'));
-    arr.AddElement(Visit(Node.AsAddSeriesItem.Series));
-    arr.AddElement(Visit(Node.AsAddSeriesItem.Value));
-    if Assigned(Node.AsAddSeriesItem.Lookback) then
-        arr.AddElement(Visit(Node.AsAddSeriesItem.Lookback))
+    n := Node.AsAddSeriesItem;
+    arr := TJSONArray.Create;
+    arr.Add('Add');
+    arr.AddElement(Visit(n.Series));
+    arr.AddElement(Visit(n.Value));
+    if Assigned(n.Lookback) then
+        arr.AddElement(Visit(n.Lookback))
     else
         arr.AddElement(TJSONNull.Create);
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitSeriesLength(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Count'));
+    arr := TJSONArray.Create;
+    arr.Add('Count');
     arr.AddElement(Visit(Node.AsSeriesLength.Series));
     Result := arr;
 end;
 
-function TJsonAstConverter.VisitPipe(const Node: IAstNode): TJSONValue;
+function TJsonAstConverter.VisitRecurNode(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    var arr := TJSONArray.Create;
-    arr.AddElement(TJSONString.Create('Pipe'));
-    arr.AddElement(Visit(Node.AsPipe.Inputs));
-    arr.AddElement(Visit(Node.AsPipe.Transformation));
+    arr := TJSONArray.Create;
+    arr.Add('Recur');
+    arr.AddElement(Visit(Node.AsRecur.Arguments));
     Result := arr;
 end;
 
 function TJsonAstConverter.VisitNop(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
 begin
-    Result := TJSONArray.Create;
-    TJSONArray(Result).AddElement(TJSONString.Create('Nop'));
+    arr := TJSONArray.Create;
+    arr.Add('Nop');
+    Result := arr;
 end;
 
-function TJsonAstConverter.VisitMacroExpansionNode(const Node: IAstNode): TJSONValue;
+function TJsonAstConverter.VisitPipe(const Node: IAstNode): TJSONValue;
+var
+    arr: TJSONArray;
+    n: IPipeNode;
 begin
-    // Serialize original call
-    Result := Visit(Node.AsMacroExpansion.CallNode);
+    n := Node.AsPipe;
+    arr := TJSONArray.Create;
+    arr.Add('Pipe');
+    arr.AddElement(Visit(n.Inputs));
+    arr.AddElement(Visit(n.Transformation));
+    Result := arr;
 end;
 
-// --- Deserialization (JSON Array -> AST) ---
+// --- Deserialization ---
 
 function TJsonAstConverter.JsonToDataValue(const AJson: TJSONValue): TDataValue;
 var
@@ -458,8 +506,18 @@ function TJsonAstConverter.JsonToNode(const AJson: TJSONValue): IAstNode;
 var
     arr: TJSONArray;
     kind: string;
+
+    function UnpackTuple(Val: TJSONValue): TArray<IAstNode>;
+    begin
+        var n := JsonToNode(Val);
+        if Assigned(n) then
+            Result := n.AsTuple.Elements
+        else
+            Result := [];
+    end;
+
 begin
-    if AJson is TJSONNull then
+    if (not Assigned(AJson)) or (AJson is TJSONNull) then
         exit(nil);
 
     if not (AJson is TJSONArray) then
@@ -472,32 +530,45 @@ begin
     kind := arr.Items[0].Value;
 
     if kind = 'Id' then
-        Exit(TAst.Identifier(arr.Items[1].Value));
+        exit(TAst.Identifier(arr.Items[1].Value));
     if kind = 'Key' then
-        Exit(TAst.Keyword(arr.Items[1].Value));
+        exit(TAst.Keyword(arr.Items[1].Value));
     if kind = 'Const' then
-        Exit(TAst.Constant(JsonToDataValue(arr.Items[1])));
-    if kind = 'Tuple' then
-        Exit(JsonToTuple(arr.Items[1] as TJSONArray));
-    if kind = 'Block' then
-        Exit(TAst.Block(JsonToTuple(arr.Items[1] as TJSONArray).Elements));
+        exit(TAst.Constant(JsonToDataValue(arr.Items[1])));
     if kind = 'Nop' then
-        Exit(TAst.Nop);
+        exit(TAst.Nop);
 
+    if kind = 'Tuple' then
+        exit(JsonToTuple(arr.Items[1] as TJSONArray));
+    if kind = 'Block' then
+        exit(TAst.Block(UnpackTuple(arr.Items[1])));
+    if kind = 'Record' then
+    begin
+        var fields := UnpackTuple(arr.Items[1]);
+        var recFields := TList<IRecordFieldNode>.Create;
+        try
+            for var f in fields do
+                recFields.Add(f.AsRecordField);
+            exit(TAst.RecordLiteral(recFields.ToArray));
+        finally
+            recFields.Free;
+        end;
+    end;
+    if kind = 'Field' then
+        exit(TAst.RecordField(JsonToNode(arr.Items[1]).AsKeyword, JsonToNode(arr.Items[2])));
     if kind = 'Call' then
-        Exit(TAst.FunctionCall(JsonToNode(arr.Items[1]), JsonToTuple(arr.Items[2] as TJSONArray).Elements));
-
+        exit(TAst.FunctionCall(JsonToNode(arr.Items[1]), UnpackTuple(arr.Items[2])));
     if kind = 'Fn' then
-        // Pass TIdentities.Structural as Identity to satisfy the overload requiring (Identity, Tuple, Body, ...)
-        Exit(TAst.LambdaExpr(TIdentities.Structural, JsonToTuple(arr.Items[1] as TJSONArray), JsonToNode(arr.Items[2])));
+        exit(TAst.LambdaExpr(TIdentities.Structural, JsonToNode(arr.Items[1]).AsTuple, JsonToNode(arr.Items[2])));
+    if kind = 'Recur' then
+        exit(TAst.Recur(UnpackTuple(arr.Items[1])));
 
     if kind = 'Macro' then
-        // Pass TIdentities.Structural as Identity
-        Exit(
+        exit(
             TAst.MacroDef(
                 TIdentities.Structural,
                 JsonToNode(arr.Items[1]).AsIdentifier,
-                JsonToTuple(arr.Items[2] as TJSONArray),
+                JsonToNode(arr.Items[2]).AsTuple,
                 JsonToNode(arr.Items[3])
             )
         );
@@ -505,20 +576,20 @@ begin
     if kind = 'Var' then
     begin
         var init: IAstNode := nil;
-        if arr.Count > 2 then
+        if (arr.Count > 2) and (not (arr.Items[2] is TJSONNull)) then
             init := JsonToNode(arr.Items[2]);
-        Exit(TAst.VarDecl(JsonToNode(arr.Items[1]), init));
+        exit(TAst.VarDecl(JsonToNode(arr.Items[1]), init));
     end;
 
     if kind = 'Assign' then
-        Exit(TAst.Assign(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2])));
+        exit(TAst.Assign(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2])));
 
     if kind = 'If' then
     begin
         var el: IAstNode := nil;
-        if arr.Count > 3 then
+        if (arr.Count > 3) and (not (arr.Items[3] is TJSONNull)) then
             el := JsonToNode(arr.Items[3]);
-        Exit(TAst.IfExpr(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2]), el));
+        exit(TAst.IfExpr(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2]), el));
     end;
 
     if kind = 'Cond' then
@@ -532,68 +603,40 @@ begin
             pairs[i] := TCondPair.Create(JsonToNode(p.Items[0]), JsonToNode(p.Items[1]));
         end;
         var el: IAstNode := nil;
-        if arr.Count > 2 then
+        if (arr.Count > 2) and (not (arr.Items[2] is TJSONNull)) then
             el := JsonToNode(arr.Items[2]);
-        Exit(TAst.CondExpr(pairs, el));
+        exit(TAst.CondExpr(pairs, el));
     end;
 
     if kind = 'Quote' then
-        Exit(TAst.Quasiquote(JsonToNode(arr.Items[1])));
+        exit(TAst.Quasiquote(JsonToNode(arr.Items[1])));
     if kind = 'Unquote' then
-        Exit(TAst.Unquote(JsonToNode(arr.Items[1])));
+        exit(TAst.Unquote(JsonToNode(arr.Items[1])));
+
+    // Splice Fix: Direkte Instanziierung um Factory-Overload E2250 zu umgehen
     if kind = 'Splice' then
-        Exit(TAst.UnquoteSplicing(JsonToNode(arr.Items[1]).AsQuasiquote));
-    if kind = 'Recur' then
-        Exit(TAst.Recur(JsonToTuple(arr.Items[1] as TJSONArray).Elements));
+        exit(TUnquoteSplicingNode.Create(JsonToNode(arr.Items[1]), TIdentities.Structural(nil)));
 
     if kind = 'Index' then
-        Exit(TAst.Indexer(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2])));
+        exit(TAst.Indexer(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2])));
     if kind = 'Member' then
-        Exit(TAst.MemberAccess(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2]).AsKeyword));
-
-    if kind = 'Record' then
-    begin
-        var fieldsTuple := JsonToTuple(arr.Items[1] as TJSONArray);
-        var recFields: TList<IRecordFieldNode> := TList<IRecordFieldNode>.Create;
-        try
-            for var elem in fieldsTuple.Elements do
-            begin
-                if elem.Kind = akRecordField then
-                    recFields.Add(elem.AsRecordField)
-                else
-                    raise EInvalidCast.Create('Expected RecordField');
-            end;
-            Exit(TAst.RecordLiteral(recFields.ToArray));
-        finally
-            recFields.Free;
-        end;
-    end;
-
-    // Explicit RecordField deserializer support
-    if kind = 'Field' then
-        Exit(TAst.RecordField(JsonToNode(arr.Items[1]).AsKeyword, JsonToNode(arr.Items[2])));
-
+        exit(TAst.MemberAccess(JsonToNode(arr.Items[1]), JsonToNode(arr.Items[2]).AsKeyword));
     if kind = 'Series' then
-        Exit(TAst.CreateSeries(JsonToNode(arr.Items[1])));
+        exit(TAst.CreateSeries(JsonToNode(arr.Items[1])));
+    if kind = 'Count' then
+        exit(TAst.SeriesLength(JsonToNode(arr.Items[1]).AsIdentifier));
+    if kind = 'Pipe' then
+        exit(TAst.Pipe(JsonToNode(arr.Items[1]).AsTuple, JsonToNode(arr.Items[2]).AsLambdaExpression));
 
     if kind = 'Add' then
     begin
         var lb: IAstNode := nil;
-        if arr.Count > 3 then
+        if (arr.Count > 3) and (not (arr.Items[3] is TJSONNull)) then
             lb := JsonToNode(arr.Items[3]);
-        Exit(TAst.AddSeriesItem(JsonToNode(arr.Items[1]).AsIdentifier, JsonToNode(arr.Items[2]), lb));
+        exit(TAst.AddSeriesItem(JsonToNode(arr.Items[1]).AsIdentifier, JsonToNode(arr.Items[2]), lb));
     end;
 
-    if kind = 'Count' then
-        Exit(TAst.SeriesLength(JsonToNode(arr.Items[1]).AsIdentifier));
-
-    if kind = 'Pipe' then
-        Exit(TAst.Pipe(JsonToTuple(arr.Items[1] as TJSONArray), JsonToNode(arr.Items[2]).AsLambdaExpression));
-
     raise ENotSupportedException.Create('Unknown JSON AST Kind: ' + kind);
 end;
 
 end.
-    //==================================================================================================
-//== FULL UNIT END: Myc.Ast.Json
-//==================================================================================================

Src/AST/Myc.Ast.Json.Schema.pas

@@ -9,16 +9,28 @@ uses
     system.generics.defaults,
     system.rtti,
     system.typinfo,
+    system.json,
+    Myc.Data.Scalar,
+    Myc.Data.Value,
     Myc.Ast.Nodes,
     Myc.Ast.Attributes,
     Myc.Ast.RTL,
-    Myc.Ast.RTL.Core;
+    Myc.Ast.RTL.Core,
+    Myc.Ast.Scope,
+    Myc.Ast.Types,
+    Myc.Ast.Script,
+    Myc.Ast.Json;
 
 type
-    { Scans AST and RTL metadata to generate a high-precision LLM system prompt. }
+    { Scans AST, RTL and Scope metadata to generate a context-aware LLM system prompt. }
     TAstSchema = class
     strict private
         type
+            TRtlMeta = record
+                Doc: string;
+                Signatures: TArray<string>;
+            end;
+
             TFieldInfo = record
                 Idx: Integer;
                 Name: string;
@@ -26,18 +38,23 @@ type
             end;
 
         class function GetTsType(Kind: TFieldKind): string; static;
+        class function TypeToTs(const AType: IStaticType): string; static;
+        class function GetRtlMetadata: TDictionary<string, TRtlMeta>; static;
     public
-        // Generates the TypeScript definition including JSDoc and multiple @example entries
+        // Generates the TypeScript definition for AST nodes
         class function GenerateTypeScriptDefinition: string; static;
 
-        // Generates documented RTL function signatures with all overloads
-        class function GenerateRtlDocumentation: string; static;
+        // Unified section: Lists only symbols available in the current scope with their docs/types
+        class function GenerateAvailableSymbols(const AScope: IExecutionScope): string; static;
 
-        // Detailed generation rules to eliminate ambiguity
+        // Documentation for all RTL functions (used as fallback or for general prompts)
+        class function GenerateAllRtlDocumentation: string; static;
+
+        // Detailed generation rules
         class function GenerateGenerationRules: string; static;
 
-        // The final consolidated system prompt
-        class function GenerateFullSystemPrompt: string; static;
+        // The final consolidated system prompt for the AI
+        class function GenerateFullSystemPrompt(const AScope: IExecutionScope = nil): string; static;
     end;
 
 implementation
@@ -58,6 +75,103 @@ begin
     end;
 end;
 
+class function TAstSchema.TypeToTs(const AType: IStaticType): string;
+begin
+    if not Assigned(AType) then
+        exit('any');
+
+    case AType.Kind of
+        stOrdinal, stFloat: Result := 'number';
+        stBoolean: Result := 'boolean';
+        stDateTime: Result := 'datetime';
+        stText: Result := 'string';
+        stKeyword: Result := 'keyword';
+        stSeries: Result := Format('Series<%s>', [TypeToTs(AType.AsSeries.ElementType)]);
+        stRecord:
+        begin
+            var def := AType.AsRecord.Definition;
+            var fields := TList<string>.Create;
+            try
+                for var i := 0 to def.Count - 1 do
+                    fields.Add(Format('%s: %s', [def.Keywords[i].Name, def[i].ToString.ToLower]));
+                Result := '{ ' + string.Join(', ', fields.ToArray) + ' }';
+            finally
+                fields.Free;
+            end;
+        end;
+        stRecordSeries: Result := 'Stream<' + TypeToTs(TTypes.CreateRecord(AType.AsRecord.Definition)) + '>';
+        stMethod:
+        begin
+            if Length(AType.AsMethod.Signatures) = 0 then
+                exit('function');
+            var sig := AType.AsMethod.Signatures[0];
+            var args := TList<string>.Create;
+            try
+                for var p in sig.ParamTypes do
+                    args.Add(TypeToTs(p));
+                Result := Format('(%s) => %s', [string.Join(', ', args.ToArray), TypeToTs(sig.ReturnType)]);
+            finally
+                args.Free;
+            end;
+        end;
+    else
+        Result := 'any';
+    end;
+
+    if AType.IsOptional then
+        Result := Result + ' | null';
+end;
+
+class function TAstSchema.GetRtlMetadata: TDictionary<string, TRtlMeta>;
+var
+    ctx: TRttiContext;
+    typ: TRttiType;
+    meth: TRttiMethod;
+    attr: TCustomAttribute;
+    meta: TRtlMeta;
+    rtlName: string;
+    sigs: TList<string>;
+begin
+    Result := TDictionary<string, TRtlMeta>.Create;
+    sigs := TList<string>.Create;
+    try
+        typ := ctx.GetType(TypeInfo(TRtlFunctions));
+        for meth in typ.GetMethods do
+        begin
+            rtlName := '';
+            meta.Doc := '';
+            sigs.Clear;
+            for attr in meth.GetAttributes do
+            begin
+                if attr is AstDocAttribute then
+                    meta.Doc := AstDocAttribute(attr).Description;
+                if attr is TRtlExportAttribute then
+                    rtlName := TRtlExportAttribute(attr).Name;
+                if attr is AstSignatureAttribute then
+                    sigs.Add(AstSignatureAttribute(attr).Signature);
+            end;
+            if rtlName <> '' then
+            begin
+                meta.Signatures := sigs.ToArray;
+                if Result.ContainsKey(rtlName) then
+                begin
+                    var existing := Result[rtlName];
+                    var combinedSigs := TList<string>.Create;
+                    combinedSigs.AddRange(existing.Signatures);
+                    combinedSigs.AddRange(meta.Signatures);
+                    existing.Signatures := combinedSigs.ToArray;
+                    combinedSigs.Free;
+                    Result[rtlName] := existing;
+                end
+                else
+                    Result.Add(rtlName, meta);
+            end;
+        end;
+    finally
+        sigs.Free;
+    end;
+end;
+
 class function TAstSchema.GenerateTypeScriptDefinition: string;
 var
     ctx: TRttiContext;
@@ -71,9 +185,11 @@ var
     tag, doc: string;
     fieldList: TList<TFieldInfo>;
     exampleList: TList<string>;
+    jsonConv: IJsonAstConverter;
     i: Integer;
 begin
     ctx := TRttiContext.Create;
+    jsonConv := TJsonAstConverter.Create;
     nodeDefs := TDictionary<string, TList<TFieldInfo>>.Create;
     nodeDocs := TDictionary<string, string>.Create;
     nodeExamples := TDictionary<string, TList<string>>.Create;
@@ -84,27 +200,33 @@ begin
         begin
             if typ.TypeKind <> tkInterface then
                 continue;
-
             tag := '';
             doc := '';
             fieldList := nil;
             exampleList := nil;
-
             for attr in typ.GetAttributes do
             begin
                 if attr is AstTagAttribute then
                     tag := AstTagAttribute(attr).Tag;
-
                 if attr is AstDocAttribute then
                     doc := AstDocAttribute(attr).Description;
-
-                if attr is AstExampleAttribute then
+                if attr is AstScriptExampleAttribute then
                 begin
                     if exampleList = nil then
                         exampleList := TList<string>.Create;
-                    exampleList.Add(AstExampleAttribute(attr).Example);
+                    try
+                        var node := TAstScript.Parse(AstScriptExampleAttribute(attr).Script);
+                        var jsonVal := jsonConv.Serialize(node);
+                        try
+                            exampleList.Add(jsonVal.ToJSON);
+                        finally
+                            jsonVal.Free;
+                        end;
+                    except
+                        on E: Exception do
+                            exampleList.Add('/* Error in example */');
+                    end;
                 end;
-
                 if attr is AstFieldAttribute then
                 begin
                     if fieldList = nil then
@@ -116,7 +238,6 @@ begin
                     fieldList.Add(f);
                 end;
             end;
-
             if tag <> '' then
             begin
                 unionTypes.Add(tag);
@@ -134,13 +255,8 @@ begin
                 exampleList.Free;
             end;
         end;
-
-        sb.AppendLine('// AST Schema Definition (Auto-Generated)');
-        sb.AppendLine('// Format: Compact JSON Arrays [Tag, Arg1, Arg2, ...]');
-        sb.AppendLine;
-
+        sb.AppendLine('// AST Schema Definition' + sLineBreak + '// Format: Compact JSON Arrays [Tag, Arg1, Arg2, ...]' + sLineBreak);
         unionTypes.Sort;
-
         sb.AppendLine('type AstNode = ');
         for i := 0 to unionTypes.Count - 1 do
         begin
@@ -148,38 +264,33 @@ begin
             if i < unionTypes.Count - 1 then
                 sb.AppendLine;
         end;
-        sb.AppendLine(';');
-        sb.AppendLine;
-
-        sb.AppendLine('/** Explicit list structure */');
-        sb.AppendLine('type Tuple = ["Tuple", AstNode[]];');
-        sb.AppendLine;
-
+        sb.AppendLine(
+            ';'
+                + sLineBreak
+                + sLineBreak
+                + '/** Explicit list structure */'
+                + sLineBreak
+                + 'type Tuple = ["Tuple", AstNode[]];'
+                + sLineBreak
+        );
         for tag in unionTypes do
         begin
             if tag = 'Tuple' then
                 continue;
-
             sb.Append('/** ');
             if nodeDocs.TryGetValue(tag, doc) then
                 sb.Append(doc);
-
             if nodeExamples.TryGetValue(tag, exampleList) then
-            begin
                 for var ex in exampleList do
                     sb.Append(sLineBreak + '    @example ' + ex);
-            end;
             sb.AppendLine(' */');
-
             fieldList := nodeDefs[tag];
             fieldList.Sort(TComparer<TFieldInfo>.Construct(function(const L, R: TFieldInfo): Integer begin Result := L.Idx - R.Idx; end));
-
             sb.Append('type ' + tag + ' = ["' + tag + '"');
             for var f in fieldList do
                 sb.Append(Format(', %s /* %s */', [GetTsType(f.Kind), f.Name]));
             sb.AppendLine('];');
         end;
-
         Result := sb.ToString;
     finally
         for fieldList in nodeDefs.Values do
@@ -195,111 +306,126 @@ begin
     end;
 end;
 
-class function TAstSchema.GenerateRtlDocumentation: string;
+class function TAstSchema.GenerateAvailableSymbols(const AScope: IExecutionScope): string;
 var
-    ctx: TRttiContext;
-    typ: TRttiType;
-    meth: TRttiMethod;
-    attr: TCustomAttribute;
-    doc, rtlName: string;
-    sigs: TList<string>;
     sb: TStringBuilder;
-    processedNames: THashSet<string>;
+    rtlMeta: TDictionary<string, TRtlMeta>;
+    layout: IScopeLayout;
+    symbols: TArray<string>;
+    name: string;
+    meta: TRtlMeta;
+    typ: IStaticType;
 begin
-    ctx := TRttiContext.Create;
+    if not Assigned(AScope) then
+        exit('');
+
+    rtlMeta := GetRtlMetadata;
     sb := TStringBuilder.Create;
-    sigs := TList<string>.Create;
-    processedNames := THashSet<string>.Create;
     try
-        typ := ctx.GetType(TypeInfo(TRtlFunctions));
-        sb.AppendLine('### 3. Runtime Library (Available Functions)');
+        layout := AScope.Descriptor.Layout;
+        symbols := layout.GetSymbols;
+        TArray.Sort<string>(symbols);
+
+        sb.AppendLine('### 3. Available Symbols (Environment & Library)');
+        sb.AppendLine('The following symbols are currently defined and can be used in your script:');
         sb.AppendLine;
 
-        for meth in typ.GetMethods do
+        for name in symbols do
         begin
-            doc := '';
-            rtlName := '';
-            sigs.Clear;
+            if name.StartsWith('<') or name.EndsWith('>') then
+                continue;
 
-            for attr in meth.GetAttributes do
+            sb.Append(Format('- `%s`', [name]));
+
+            if rtlMeta.TryGetValue(name, meta) then
             begin
-                if attr is AstDocAttribute then
-                    doc := AstDocAttribute(attr).Description;
-                if attr is TRtlExportAttribute then
-                    rtlName := TRtlExportAttribute(attr).Name;
-                if attr is AstSignatureAttribute then
-                    sigs.Add(AstSignatureAttribute(attr).Signature);
+                if Length(meta.Signatures) > 0 then
+                    sb.Append(': ' + string.Join(' | ', meta.Signatures));
+                if meta.Doc <> '' then
+                    sb.Append(' — ' + meta.Doc);
+            end
+            else
+            begin
+                typ := AScope.Descriptor.GetSymbolType(layout.FindSlot(name));
+                sb.Append(': ' + TypeToTs(typ));
             end;
-
-            if (rtlName <> '') and (not processedNames.Contains(rtlName)) then
-            begin
-                sb.Append(Format('- `%s`', [rtlName]));
-                if sigs.Count > 0 then
-                    sb.Append(': ' + string.Join(' | ', sigs.ToArray));
-                if doc <> '' then
-                    sb.Append(' — ' + doc);
             sb.AppendLine;
-                processedNames.Add(rtlName);
-            end;
         end;
         Result := sb.ToString;
     finally
-        processedNames.Free;
-        sigs.Free;
         sb.Free;
-        ctx.Free;
+        rtlMeta.Free;
+    end;
+end;
+
+class function TAstSchema.GenerateAllRtlDocumentation: string;
+var
+    rtlMeta: TDictionary<string, TRtlMeta>;
+    sb: TStringBuilder;
+    pair: TPair<string, TRtlMeta>;
+begin
+    rtlMeta := GetRtlMetadata;
+    sb := TStringBuilder.Create;
+    try
+        sb.AppendLine('### 3. Runtime Library (Global Functions)');
+        sb.AppendLine;
+        for pair in rtlMeta do
+        begin
+            sb.Append(Format('- `%s`', [pair.Key]));
+            if Length(pair.Value.Signatures) > 0 then
+                sb.Append(': ' + string.Join(' | ', pair.Value.Signatures));
+            if pair.Value.Doc <> '' then
+                sb.Append(' — ' + pair.Value.Doc);
+            sb.AppendLine;
+        end;
+        Result := sb.ToString;
+    finally
+        sb.Free;
+        rtlMeta.Free;
     end;
 end;
 
 class function TAstSchema.GenerateGenerationRules: string;
-var
-    sb: TStringBuilder;
-begin
-    sb := TStringBuilder.Create;
-    try
-        sb.AppendLine('**⚠️ CRITICAL GENERATION RULES:**');
-        sb.AppendLine;
-        sb.AppendLine('1. **NO JSON OBJECTS:** Do not use `{}`. Every node MUST be a JSON Array `["Tag", Arg1, Arg2]`.');
-        sb.AppendLine('2. **EXPLICIT TUPLES:** Fields defined as `Tuple` MUST be wrapped in `["Tuple", [...]]`.');
-        sb.AppendLine('3. **EXPLICIT NULLS:** Optional fields (`| null`) MUST be explicit `null` if not present.');
-        sb.AppendLine('4. **STRICT ORDER:** Array elements must follow the schema index exactly. Never swap arguments.');
-        sb.AppendLine(
-            '5. **OPERATORS:** Use `Call` with an `Id` for operators: `["Call", ["Id", "+"], ["Tuple", [["Const", 1], ["Const", 2]]]]`.'
-        );
-        sb.AppendLine(
-            '6. **ID VS KEY:** Use `Key` for record keys (e.g. `["Field", ["Key", "p"], ...]`). Use `Id` for variables, functions, and operators.'
-        );
-        sb.AppendLine('7. **BOOLEANS:** The literals `true` and `false` are identifiers: `["Id", "true"]` or `["Id", "false"]`.');
-        sb.AppendLine(
-            '8. **SCALAR TYPES:** Valid types for series definitions are: `:Ordinal`, `:Float`, `:Boolean`, `:Text`, `:DateTime`.'
-        );
-        sb.AppendLine('9. **NESTED ARRAYS:** In "Cond", the pairs are an array of arrays: `[ [cond1, branch1], [cond2, branch2] ]`.');
-        sb.AppendLine('10. **RECURSION:** Use `Recur` for tail-recursive calls to enable optimization.');
-        sb.AppendLine('11. **NO COMMENTS:** Output raw JSON only. No explanations.');
-
-        Result := sb.ToString;
-    finally
-        sb.Free;
-    end;
-end;
-
-class function TAstSchema.GenerateFullSystemPrompt: string;
 begin
     Result :=
-        'You are a compiler frontend for a domain-specific scripting language.'
-            + sLineBreak
-            + 'Your task is to generate a valid Abstract Syntax Tree (AST) in a specific Compact JSON format.'
-            + sLineBreak
-            + sLineBreak
-            + '### 1. AST Schema (TypeScript Definition)'
+        '''
+    **⚠️ CRITICAL GENERATION RULES:**
+
+    1. **NO JSON OBJECTS:** Do not use `{}`. Every node MUST be a JSON Array `["Tag", Arg1, Arg2]`.
+    2. **EXPLICIT TUPLES:** Fields defined as `Tuple` MUST be wrapped in `["Tuple", [...]]`.
+    3. **EXPLICIT NULLS:** Optional fields (`| null`) MUST be explicit `null` if not present.
+    4. **STRICT ORDER:** Array elements must follow the schema index exactly.
+    5. **OPERATORS:** Use `Call` with an `Id` for operators: `["Call", ["Id", "+"], ["Tuple", [["Const", 1], ["Const", 2]]]]`.
+    6. **ID VS KEY:** Use `Key` for record keys. Use `Id` for variables, functions, and operators.
+    7. **BOOLEANS:** The literals `true` and `false` are identifiers: `["Id", "true"]` or `["Id", "false"]`.
+    8. **SCALAR TYPES:** Valid types for series definitions are: `:Ordinal`, `:Float`, `:Boolean`, `:Text`, `:DateTime`.
+    9. **NESTED ARRAYS:** In "Cond", the pairs are an array of arrays: `[ [cond1, branch1], [cond2, branch2] ]`.
+    10. **RECURSION:** Use `Recur` for tail-recursive calls to enable optimization.
+    11. **NO COMMENTS:** Output raw JSON only.
+    ''';
+end;
+
+class function TAstSchema.GenerateFullSystemPrompt(const AScope: IExecutionScope): string;
+begin
+    Result :=
+        '''
+    You are a compiler frontend for a domain-specific scripting language.
+    Your task is to generate a valid Abstract Syntax Tree (AST) in a specific Compact JSON format.
+
+    ### 1. AST Schema (TypeScript Definition)
+    '''
             + sLineBreak
             + GenerateTypeScriptDefinition
             + sLineBreak
             + '### 2. Constraints & Rules'
             + sLineBreak
             + GenerateGenerationRules
-            + sLineBreak
-            + GenerateRtlDocumentation;
+            + sLineBreak;
+
+    if Assigned(AScope) then
+        Result := Result + GenerateAvailableSymbols(AScope)
+    else
+        Result := Result + GenerateAllRtlDocumentation;
 end;
 
 end.

Src/AST/Myc.Ast.Nodes.pas

@@ -206,18 +206,18 @@ type
         property IsPure: Boolean read GetIsPure;
     end;
 
-    // --- Specialized Node Interfaces with Examples and Docs ---
+    // --- Specialized Node Interfaces with Metadata ---
 
     [AstTag('Nop')]
     [AstDoc('A placeholder that performs no action.')]
-    [AstExample('["Nop"]')]
+    [AstScriptExample('...')]
     INopNode = interface(IAstTypedNode)
     end;
 
     [AstTag('Const')]
     [AstDoc('A literal value (number, string, or boolean).')]
-    [AstExample('["Const", 42]')]
-    [AstExample('["Const", "Myc"]')]
+    [AstScriptExample('42')]
+    [AstScriptExample('"Myc Script"')]
     [AstField(0, 'value', fkValue)]
     IConstantNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -228,7 +228,8 @@ type
 
     [AstTag('Id')]
     [AstDoc('A name referring to a variable, parameter or function.')]
-    [AstExample('["Id", "x"]')]
+    [AstScriptExample('price')]
+    [AstScriptExample('+')]
     [AstField(0, 'name', fkString)]
     IIdentifierNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -240,8 +241,8 @@ type
     end;
 
     [AstTag('Key')]
-    [AstDoc('An interned keyword literal.')]
-    [AstExample('["Key", "volume"]')]
+    [AstDoc('A keyword literal, typically used as record keys.')]
+    [AstScriptExample(':volume')]
     [AstField(0, 'name', fkString)]
     IKeywordNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -252,7 +253,8 @@ type
 
     [AstTag('Tuple')]
     [AstDoc('A positional collection of elements (Vector).')]
-    [AstExample('["Tuple", [["Const", 1], ["Id", "y"]]]')]
+    [AstScriptExample('[1 2 3]')]
+    [AstScriptExample('["a" :b c]')]
     [AstField(0, 'elements', fkNode)]
     ITupleNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -276,17 +278,8 @@ type
 
     [AstTag('If')]
     [AstDoc('Conditional ternary expression.')]
-    [
-        AstExample(
-            '''
-    ["If",
-        ["Call", ["Id", ">"], ["Tuple", [["Id", "x"], ["Const", 0]]]],
-        ["Const", "ok"],
-        ["Const", "fail"]
-    ]
-    '''
-        )
-    ]
+    [AstScriptExample('(if (> x 0) 1 -1)')]
+    [AstScriptExample('(if true "yes")')]
     [AstField(0, 'cond', fkNode)]
     [AstField(1, 'then', fkNode)]
     [AstField(2, 'else', fkNullableNode)]
@@ -304,15 +297,11 @@ type
     [AstTag('Cond')]
     [AstDoc('Multi-branch condition. Pairs are [ [cond, branch], ... ].')]
     [
-        AstExample(
+        AstScriptExample(
             '''
-    ["Cond",
-        [
-            [["Call", ["Id", "="], ["Tuple", [["Id", "s"], ["Const", 1]]]], ["Key", "up"]],
-            [["Call", ["Id", "="], ["Tuple", [["Id", "s"], ["Const", 2]]]], ["Key", "down"]]
-        ],
-        ["Key", "flat"]
-    ]
+    (? (> x 0) :positive
+       (< x 0) :negative
+       :zero)
     '''
         )
     ]
@@ -328,17 +317,8 @@ type
     end;
 
     [AstTag('Fn')]
-    [AstDoc('Anonymous function definition (lambda).')]
-    [
-        AstExample(
-            '''
-    ["Fn",
-        ["Tuple", [["Id", "a"], ["Id", "b"]]],
-        ["Call", ["Id", "+"], ["Tuple", [["Id", "a"], ["Id", "b"]]]]
-    ]
-    '''
-        )
-    ]
+    [AstDoc('An anonymous function definition (lambda).')]
+    [AstScriptExample('(fn [a b] (+ a b))')]
     [AstField(0, 'params', fkTuple)]
     [AstField(1, 'body', fkNode)]
     ILambdaExpressionNode = interface(IFunctionDefinition)
@@ -355,8 +335,9 @@ type
     end;
 
     [AstTag('Call')]
-    [AstDoc('Function or operator invocation.')]
-    [AstExample('["Call", ["Id", "abs"], ["Tuple", [["Const", -5]]]]')]
+    [AstDoc('A function or operator invocation.')]
+    [AstScriptExample('(abs -5)')]
+    [AstScriptExample('(SMA src 14)')]
     [AstField(0, 'callee', fkNode)]
     [AstField(1, 'args', fkTuple)]
     IFunctionCallNode = interface(IAstTypedNode)
@@ -375,15 +356,14 @@ type
     end;
 
     [AstTag('Block')]
-    [AstDoc('Sequential execution of nodes.')]
+    [AstDoc('Sequential execution of nodes, returning the last result.')]
     [
-        AstExample(
+        AstScriptExample(
             '''
-    ["Block", ["Tuple", [
-        ["Var", ["Id", "a"], ["Const", 1]],
-        ["Assign", ["Id", "a"], ["Call", ["Id", "+"], ["Tuple", [["Id", "a"], ["Const", 1]]]]],
-        ["Id", "a"]
-    ]]]
+    (do
+        (def x 10)
+        (assign x (* x 2))
+        x)
     '''
         )
     ]
@@ -396,8 +376,9 @@ type
     end;
 
     [AstTag('Var')]
-    [AstDoc('Variable declaration.')]
-    [AstExample('["Var", ["Id", "val"], ["Const", 0]]')]
+    [AstDoc('Declares a new variable in the current scope.')]
+    [AstScriptExample('(def x 10)')]
+    [AstScriptExample('(def y)')]
     [AstField(0, 'target', fkNode)]
     [AstField(1, 'init', fkNullableNode)]
     IVariableDeclarationNode = interface(IAstTypedNode)
@@ -412,8 +393,8 @@ type
     end;
 
     [AstTag('Assign')]
-    [AstDoc('Variable assignment.')]
-    [AstExample('["Assign", ["Id", "x"], ["Const", 1]]')]
+    [AstDoc('Updates the value of an existing variable.')]
+    [AstScriptExample('(assign x 20)')]
     [AstField(0, 'target', fkNode)]
     [AstField(1, 'value', fkNode)]
     IAssignmentNode = interface(IAstTypedNode)
@@ -426,15 +407,12 @@ type
     end;
 
     [AstTag('Macro')]
-    [AstDoc('Syntactic macro definition.')]
+    [AstDoc('Defines a compile-time syntactic macro.')]
     [
-        AstExample(
+        AstScriptExample(
             '''
-    ["Macro",
-        ["Id", "unless"],
-        ["Tuple", [["Id", "condition"], ["Id", "body"]]],
-        ["Quote", ["If", ["Id", "condition"], ["Nop"], ["Unquote", ["Id", "body"]]]]
-    ]
+    (defmacro unless [c b]
+        `(if ~c ... ~b))
     '''
         )
     ]
@@ -453,7 +431,8 @@ type
     end;
 
     [AstTag('Quote')]
-    [AstDoc('Suppresses evaluation of an expression.')]
+    [AstDoc('Quotes an expression to prevent immediate evaluation.')]
+    [AstScriptExample('`(+ 1 2)')]
     [AstField(0, 'expr', fkNode)]
     IQuasiquoteNode = interface(IAstNode)
         {$region 'private'}
@@ -463,7 +442,8 @@ type
     end;
 
     [AstTag('Unquote')]
-    [AstDoc('Enables evaluation inside a quoted context.')]
+    [AstDoc('Evaluates an expression inside a quoted context.')]
+    [AstScriptExample('~x')]
     [AstField(0, 'expr', fkNode)]
     IUnquoteNode = interface(IAstNode)
         {$region 'private'}
@@ -473,18 +453,19 @@ type
     end;
 
     [AstTag('Splice')]
-    [AstDoc('Splicing evaluation into a list.')]
+    [AstDoc('Unrolls a list into the surrounding quoted list.')]
     [AstField(0, 'expr', fkNode)]
     IUnquoteSplicingNode = interface(IAstNode)
         {$region 'private'}
-        function GetExpression: IQuasiquoteNode;
+        // BUGFIX: Should return IAstNode, not IQuasiquoteNode
+        function GetExpression: IAstNode;
         {$endregion}
-        property Expression: IQuasiquoteNode read GetExpression;
+        property Expression: IAstNode read GetExpression;
     end;
 
     [AstTag('Index')]
-    [AstDoc('Element access by position.')]
-    [AstExample('["Index", ["Id", "v"], ["Const", 0]]')]
+    [AstDoc('Positional access to a vector or series element.')]
+    [AstScriptExample('(get prices 0)')]
     [AstField(0, 'base', fkNode)]
     [AstField(1, 'index', fkNode)]
     IIndexerNode = interface(IAstTypedNode)
@@ -497,8 +478,8 @@ type
     end;
 
     [AstTag('Member')]
-    [AstDoc('Field access by keyword.')]
-    [AstExample('["Member", ["Id", "rec"], ["Key", "price"]]')]
+    [AstDoc('Accesses a record field or stream member by key.')]
+    [AstScriptExample('(.price rec)')]
     [AstField(0, 'base', fkNode)]
     [AstField(1, 'member', fkNode)]
     IMemberAccessNode = interface(IAstTypedNode)
@@ -511,17 +492,8 @@ type
     end;
 
     [AstTag('Record')]
-    [AstDoc('Defines a record literal.')]
-    [
-        AstExample(
-            '''
-    ["Record", ["Tuple", [
-        ["Field", ["Key", "p"], ["Id", "p_val"]],
-        ["Field", ["Key", "q"], ["Const", 100]]
-    ]]]
-    '''
-        )
-    ]
+    [AstDoc('A literal key-value mapping.')]
+    [AstScriptExample('{:x 1 :y 2}')]
     [AstField(0, 'fields', fkTuple)]
     IRecordLiteralNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -535,8 +507,9 @@ type
     end;
 
     [AstTag('Series')]
-    [AstDoc('Stream schema definition.')]
-    [AstExample('["Series", ["Key", "Float"]]')]
+    [AstDoc('Defines a new data series schema.')]
+    [AstScriptExample('(new-series :Float)')]
+    [AstScriptExample('(new-series [[:p :Float] [:v :Ordinal]])')]
     [AstField(0, 'definition', fkNode)]
     ICreateSeriesNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -548,8 +521,9 @@ type
     end;
 
     [AstTag('Add')]
-    [AstDoc('Pushes data to a series.')]
-    [AstExample('["Add", ["Id", "s"], ["Const", 10]]')]
+    [AstDoc('Appends a value to a data series.')]
+    [AstScriptExample('(add-item s 10.5)')]
+    [AstScriptExample('(add-item s 10.5 100)')]
     [AstField(0, 'series', fkNode)]
     [AstField(1, 'value', fkNode)]
     [AstField(2, 'lookback', fkNullableNode)]
@@ -565,8 +539,8 @@ type
     end;
 
     [AstTag('Count')]
-    [AstDoc('Series length.')]
-    [AstExample('["Count", ["Id", "src"]]')]
+    [AstDoc('Returns the current number of elements in a series.')]
+    [AstScriptExample('(count prices)')]
     [AstField(0, 'series', fkNode)]
     ISeriesLengthNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -576,8 +550,8 @@ type
     end;
 
     [AstTag('Recur')]
-    [AstDoc('Tail-recursive jump.')]
-    [AstExample('["Recur", ["Tuple", [["Call", ["Id", "-"], ["Tuple", [["Id", "i"], ["Const", 1]]]]]]]')]
+    [AstDoc('Tail-recursive call to the current function.')]
+    [AstScriptExample('(recur (- n 1))')]
     [AstField(0, 'args', fkTuple)]
     IRecurNode = interface(IAstTypedNode)
         {$region 'private'}
@@ -589,18 +563,10 @@ type
     [AstTag('Pipe')]
     [AstDoc('Reactive pipeline from source streams to a transformation lambda.')]
     [
-        AstExample(
+        AstScriptExample(
             '''
-    ["Pipe",
-        ["Tuple", [
-            ["Tuple", [["Id", "src"], ["Tuple", [["Key", "price"]]]]]
-        ]],
-        ["Fn", ["Tuple", [["Id", "p"]]],
-            ["Record", ["Tuple", [
-                ["Field", ["Key", "res"], ["Call", ["Id", "*"], ["Tuple", [["Id", "p"], ["Const", 2]]]]]
-            ]]]
-        ]
-    ]
+    (pipe [[src [:val]]]
+        (fn [v] {:res (* v 2)}))
     '''
         )
     ]
@@ -946,12 +912,12 @@ type
 
     TUnquoteSplicingNode = class(TAstNode, IUnquoteSplicingNode)
     private
-        FExpression: IQuasiquoteNode;
-        function GetExpression: IQuasiquoteNode;
+        FExpression: IAstNode; // Changed to IAstNode
+        function GetExpression: IAstNode;
     protected
         function GetKind: TAstNodeKind; override;
     public
-        constructor Create(const AExpression: IQuasiquoteNode; const AIdentity: IAstIdentity);
+        constructor Create(const AExpression: IAstNode; const AIdentity: IAstIdentity);
         function AsUnquoteSplicing: IUnquoteSplicingNode; override;
     end;
 
@@ -1859,7 +1825,7 @@ end;
 
 { TUnquoteSplicingNode }
 
-constructor TUnquoteSplicingNode.Create(const AExpression: IQuasiquoteNode; const AIdentity: IAstIdentity);
+constructor TUnquoteSplicingNode.Create(const AExpression: IAstNode; const AIdentity: IAstIdentity);
 begin
     inherited Create(AIdentity);
     FExpression := AExpression;
@@ -1869,7 +1835,7 @@ function TUnquoteSplicingNode.GetKind: TAstNodeKind;
 begin
     Result := akUnquoteSplicing;
 end;
-function TUnquoteSplicingNode.GetExpression: IQuasiquoteNode;
+function TUnquoteSplicingNode.GetExpression: IAstNode;
 begin
     Result := FExpression;
 end;