refactor: remove C#, Swift, Scala, Bash language parsers

Removed 4 tree-sitter parsers to reduce binary size:
- C# (csharp): 33.6MB C source - largest contributor
- Swift: 16.3MB C source
- Scala: 23.7MB C source
- Bash: 10.2MB C source

Binary size: 44MB -> 31MB (stripped, -ldflags="-s -w")

Remaining 12 languages: Go, Python, TypeScript, Java, Ruby,
JavaScript, C, C++, Rust, Kotlin, PHP, Lua

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: tae2089

cmd/ccg/main.go

@@ -98,13 +98,9 @@ func buildWalkers(logger *slog.Logger) map[string]*treesitter.Walker {
 		{treesitter.CSpec, []string{".c", ".h"}},
 		{treesitter.CppSpec, []string{".cpp", ".cc", ".cxx", ".hpp", ".hh", ".hxx"}},
 		{treesitter.RustSpec, []string{".rs"}},
-		{treesitter.CSharpSpec, []string{".cs"}},
 		{treesitter.KotlinSpec, []string{".kt", ".kts"}},
 		{treesitter.PHPSpec, []string{".php"}},
-		{treesitter.SwiftSpec, []string{".swift"}},
-		{treesitter.ScalaSpec, []string{".scala", ".sc"}},
 		{treesitter.LuaSpec, []string{".lua"}},
-		{treesitter.BashSpec, []string{".sh", ".bash", ".zsh"}},
 	}
 
 	walkers := make(map[string]*treesitter.Walker)

internal/cli/.ccg/lint-history.json

@@ -1,5 +1,5 @@
 {
-  "timestamp": "2026-04-14T18:23:47.276948+09:00",
+  "timestamp": "2026-04-14T18:36:18.243005+09:00",
   "entries": {
     "incomplete:pkg/util.go::Format": 1,
     "missing:pkg/util.go": 1

internal/mcp/.ccg/doc-index.json

@@ -1,6 +1,6 @@
 {
   "version": 1,
-  "built_at": "2026-04-14T09:23:48.013743Z",
+  "built_at": "2026-04-14T09:36:18.807002Z",
   "root": {
     "id": "root",
     "label": "Root",

internal/parse/treesitter/langspec.go

@@ -111,17 +111,6 @@ var RubySpec = &LangSpec{
 	TestPrefix:    "test_",
 }
 
-var CSharpSpec = &LangSpec{
-	Name:           "csharp",
-	FunctionTypes:  []string{"method_declaration", "constructor_declaration"},
-	ClassTypes:     []string{"class_declaration", "struct_declaration", "record_declaration"},
-	InterfaceTypes: []string{"interface_declaration"},
-	ImportTypes:    []string{"using_directive"},
-	CallTypes:      []string{"invocation_expression"},
-	TestPrefix:     "Test",
-	TestAttributes: []string{"Test", "Fact", "Theory"},
-}
-
 var KotlinSpec = &LangSpec{
 	Name:           "kotlin",
 	FunctionTypes:  []string{"function_declaration"},
@@ -142,27 +131,6 @@ var PHPSpec = &LangSpec{
 	TestPrefix:     "test",
 }
 
-var SwiftSpec = &LangSpec{
-	Name:           "swift",
-	FunctionTypes:  []string{"function_declaration"},
-	ClassTypes:     []string{"class_declaration", "struct_declaration", "enum_declaration"},
-	InterfaceTypes: []string{"protocol_declaration"},
-	ImportTypes:    []string{"import_declaration"},
-	CallTypes:      []string{"call_expression"},
-	TestPrefix:     "test",
-	ExtensionTypes: []string{"extension_declaration"},
-}
-
-var ScalaSpec = &LangSpec{
-	Name:           "scala",
-	FunctionTypes:  []string{"function_definition"},
-	ClassTypes:     []string{"class_definition", "object_definition"},
-	InterfaceTypes: []string{"trait_definition"},
-	ImportTypes:    []string{"import_declaration"},
-	CallTypes:      []string{"call_expression"},
-	TestPrefix:     "test",
-}
-
 var LuaSpec = &LangSpec{
 	Name:          "lua",
 	FunctionTypes: []string{"function_statement"},
@@ -172,11 +140,3 @@ var LuaSpec = &LangSpec{
 	TestPrefix:    "test_",
 }
 
-var BashSpec = &LangSpec{
-	Name:          "bash",
-	FunctionTypes: []string{"function_definition"},
-	ClassTypes:    []string{},
-	ImportTypes:   []string{"command"},
-	CallTypes:     []string{"command"},
-	TestPrefix:    "test_",
-}

internal/parse/treesitter/walker.go

@@ -9,10 +9,8 @@ import (
 	"strings"
 
 	sitter "github.com/smacker/go-tree-sitter"
-	"github.com/smacker/go-tree-sitter/bash"
 	"github.com/smacker/go-tree-sitter/c"
 	"github.com/smacker/go-tree-sitter/cpp"
-	"github.com/smacker/go-tree-sitter/csharp"
 	"github.com/smacker/go-tree-sitter/golang"
 	"github.com/smacker/go-tree-sitter/java"
 	"github.com/smacker/go-tree-sitter/javascript"
@@ -22,8 +20,6 @@ import (
 	"github.com/smacker/go-tree-sitter/python"
 	"github.com/smacker/go-tree-sitter/ruby"
 	"github.com/smacker/go-tree-sitter/rust"
-	"github.com/smacker/go-tree-sitter/scala"
-	"github.com/smacker/go-tree-sitter/swift"
 	"github.com/smacker/go-tree-sitter/typescript/typescript"
 
 	"github.com/imtaebin/code-context-graph/internal/model"
@@ -602,20 +598,12 @@ func (w *Walker) getLanguage() (*sitter.Language, error) {
 		return cpp.GetLanguage(), nil
 	case "rust":
 		return rust.GetLanguage(), nil
-	case "csharp":
-		return csharp.GetLanguage(), nil
 	case "kotlin":
 		return kotlin.GetLanguage(), nil
 	case "php":
 		return php.GetLanguage(), nil
-	case "swift":
-		return swift.GetLanguage(), nil
-	case "scala":
-		return scala.GetLanguage(), nil
 	case "lua":
 		return lua.GetLanguage(), nil
-	case "bash":
-		return bash.GetLanguage(), nil
 	default:
 		return nil, fmt.Errorf("unsupported language: %s", w.spec.Name)
 	}