From a5f753c36a9dfe4feb8a7659c14e59c056560f91 Mon Sep 17 00:00:00 2001
From: Fawaz Farid <fawwazally@gmail.com>
Date: Tue, 24 Mar 2026 17:55:02 +0300
Subject: [PATCH] Return error for unsupported languages in Parse()

Signed-off-by: Fawaz Farid <fawwazally@gmail.com>
---
 kai-core/parse/parse.go      |  4 +---
 kai-core/parse/parse_test.go | 21 +++++++++++++++++++++
 2 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/kai-core/parse/parse.go b/kai-core/parse/parse.go
index 36b9e0d6..42f9c37c 100644
--- a/kai-core/parse/parse.go
+++ b/kai-core/parse/parse.go
@@ -92,9 +92,7 @@ func (p *Parser) Parse(content []byte, lang string) (*ParsedFile, error) {
 		parser = p.rsParser
 		extractFn = extractRustSymbols
 	default:
-		// Default to JavaScript parser for unknown languages
-		parser = p.jsParser
-		extractFn = extractSymbols
+		return nil, fmt.Errorf("unsupported language: %s", lang)
 	}
 
 	tree, err := parser.ParseCtx(context.Background(), nil, content)
diff --git a/kai-core/parse/parse_test.go b/kai-core/parse/parse_test.go
index d7e79e12..a0692e72 100644
--- a/kai-core/parse/parse_test.go
+++ b/kai-core/parse/parse_test.go
@@ -51,6 +51,27 @@ function hello(name) {
 	}
 }
 
+func TestParser_ParseUnsupportedLanguage(t *testing.T) {
+	parser := NewParser()
+
+	code := []byte(`
+public class Main {
+	public static void main(String[] args) {
+		System.out.println("Hello, World!");
+	}
+}
+`)
+
+	_, err := parser.Parse(code, "java")
+	if err == nil {
+		t.Fatal("Expected error for unsupported language 'java', got nil")
+	}
+
+	if err.Error() != "unsupported language: java" {
+		t.Errorf("Expected error message to contain 'unsupported', got: %v", err)
+	}
+}
+
 func TestParser_ParseClass(t *testing.T) {
 	parser := NewParser()