feat: Add programming language to CLI events (#6071)

Co-authored-by: christine betts <chrstn@uw.edu>
Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>
Co-authored-by: Adam Weidman <65992621+adamfweidman@users.noreply.github.com>
Co-authored-by: JaeHo Jang <diehreo@gmail.com>
Co-authored-by: Jacob Richman <jacob314@gmail.com>
Co-authored-by: Victor May <mayvic@google.com>
Co-authored-by: Gaurav <39389231+gsquared94@users.noreply.github.com>
Co-authored-by: joshualitt <joshualitt@google.com>
Co-authored-by: Billy Biggs <bbiggs@google.com>
Co-authored-by: Ricardo Fabbri <rfabbri@gmail.com>
Co-authored-by: Arya Gummadi <aryagummadi@google.com>
Co-authored-by: Tommaso Sciortino <sciortino@gmail.com>
Co-authored-by: Gal Zahavi <38544478+galz10@users.noreply.github.com>
Co-authored-by: Shreya Keshive <skeshive@gmail.com>
Co-authored-by: Ben Guo <36952867+HunDun0Ben@users.noreply.github.com>
Co-authored-by: Ben Guo <hundunben@gmail.com>
Co-authored-by: mkusaka <hinoshita1992@gmail.com>

docs/telemetry.md

@@ -272,6 +272,7 @@ Metrics are numerical measurements of behavior over time. The following metrics
     - `ai_removed_lines` (Int, if applicable): Number of lines removed/changed by AI.
     - `user_added_lines` (Int, if applicable): Number of lines added/changed by user in AI proposed changes.
     - `user_removed_lines` (Int, if applicable): Number of lines removed/changed by user in AI proposed changes.
+    - `programming_language` (string, if applicable): The programming language of the file.
 
 - `gemini_cli.chat_compression` (Counter, Int): Counts chat compression operations
   - **Attributes**:

packages/cli/src/ui/hooks/atCommandProcessor.test.ts

@@ -69,6 +69,7 @@ describe('handleAtCommand', () => {
         getPromptsByServer: () => [],
       }),
       getDebugMode: () => false,
+      getUsageStatisticsEnabled: () => false,
     } as unknown as Config;
 
     const registry = new ToolRegistry(mockConfig);

packages/core/src/telemetry/clearcut-logger/clearcut-logger.ts

@@ -19,6 +19,7 @@ import {
   IdeConnectionEvent,
   KittySequenceOverflowEvent,
   ChatCompressionEvent,
+  FileOperationEvent,
 } from '../types.js';
 import { EventMetadataKey } from './event-metadata-key.js';
 import { Config } from '../../config/config.js';
@@ -33,6 +34,7 @@ export enum EventNames {
   START_SESSION = 'start_session',
   NEW_PROMPT = 'new_prompt',
   TOOL_CALL = 'tool_call',
+  FILE_OPERATION = 'file_operation',
   API_REQUEST = 'api_request',
   API_RESPONSE = 'api_response',
   API_ERROR = 'api_error',
@@ -476,6 +478,64 @@ export class ClearcutLogger {
     this.flushIfNeeded();
   }
 
+  logFileOperationEvent(event: FileOperationEvent): void {
+    const data: EventValue[] = [
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_TOOL_CALL_NAME,
+        value: JSON.stringify(event.tool_name),
+      },
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_FILE_OPERATION_TYPE,
+        value: JSON.stringify(event.operation),
+      },
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_FILE_OPERATION_LINES,
+        value: JSON.stringify(event.lines),
+      },
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_FILE_OPERATION_MIMETYPE,
+        value: JSON.stringify(event.mimetype),
+      },
+      {
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_FILE_OPERATION_EXTENSION,
+        value: JSON.stringify(event.extension),
+      },
+    ];
+
+    if (event.programming_language) {
+      data.push({
+        gemini_cli_key: EventMetadataKey.GEMINI_CLI_PROGRAMMING_LANGUAGE,
+        value: event.programming_language,
+      });
+    }
+
+    if (event.diff_stat) {
+      const metadataMapping: { [key: string]: EventMetadataKey } = {
+        ai_added_lines: EventMetadataKey.GEMINI_CLI_AI_ADDED_LINES,
+        ai_removed_lines: EventMetadataKey.GEMINI_CLI_AI_REMOVED_LINES,
+        user_added_lines: EventMetadataKey.GEMINI_CLI_USER_ADDED_LINES,
+        user_removed_lines: EventMetadataKey.GEMINI_CLI_USER_REMOVED_LINES,
+      };
+
+      for (const [key, gemini_cli_key] of Object.entries(metadataMapping)) {
+        if (
+          event.diff_stat[key as keyof typeof event.diff_stat] !== undefined
+        ) {
+          data.push({
+            gemini_cli_key,
+            value: JSON.stringify(
+              event.diff_stat[key as keyof typeof event.diff_stat],
+            ),
+          });
+        }
+      }
+    }
+
+    const logEvent = this.createLogEvent(EventNames.FILE_OPERATION, data);
+    this.enqueueLogEvent(logEvent);
+    this.flushIfNeeded();
+  }
+
   logApiRequestEvent(event: ApiRequestEvent): void {
     const data: EventValue[] = [
       {

packages/core/src/telemetry/clearcut-logger/event-metadata-key.ts

@@ -219,6 +219,9 @@ export enum EventMetadataKey {
   // Logs user removed lines in edit/write tool response.
   GEMINI_CLI_USER_REMOVED_LINES = 50,
 
+  // Logs the programming language of the project.
+  GEMINI_CLI_PROGRAMMING_LANGUAGE = 56,
+
   // ==========================================================================
   // Kitty Sequence Overflow Event Keys
   // ===========================================================================
@@ -246,4 +249,20 @@ export enum EventMetadataKey {
 
   // Logs name of MCP tools as comma seperated string
   GEMINI_CLI_START_SESSION_MCP_TOOLS = 65,
+
+  // ==========================================================================
+  // File Operation Event Keys
+  // ===========================================================================
+
+  // Logs the operation type of the file operation.
+  GEMINI_CLI_FILE_OPERATION_TYPE = 66,
+
+  // Logs the number of lines in the file operation.
+  GEMINI_CLI_FILE_OPERATION_LINES = 67,
+
+  // Logs the mimetype of the file in the file operation.
+  GEMINI_CLI_FILE_OPERATION_MIMETYPE = 68,
+
+  // Logs the extension of the file in the file operation.
+  GEMINI_CLI_FILE_OPERATION_EXTENSION = 69,
 }

packages/core/src/telemetry/loggers.ts

@@ -25,6 +25,7 @@ import {
   ApiErrorEvent,
   ApiRequestEvent,
   ApiResponseEvent,
+  FileOperationEvent,
   IdeConnectionEvent,
   StartSessionEvent,
   ToolCallEvent,
@@ -42,6 +43,7 @@ import {
   recordApiResponseMetrics,
   recordToolCallMetrics,
   recordChatCompressionMetrics,
+  recordFileOperationMetric,
 } from './metrics.js';
 import { isTelemetrySdkInitialized } from './sdk.js';
 import { uiTelemetryService, UiEvent } from './uiTelemetry.js';
@@ -155,6 +157,24 @@ export function logToolCall(config: Config, event: ToolCallEvent): void {
   );
 }
 
+export function logFileOperation(
+  config: Config,
+  event: FileOperationEvent,
+): void {
+  ClearcutLogger.getInstance(config)?.logFileOperationEvent(event);
+  if (!isTelemetrySdkInitialized()) return;
+
+  recordFileOperationMetric(
+    config,
+    event.operation,
+    event.lines,
+    event.mimetype,
+    event.extension,
+    event.diff_stat,
+    event.programming_language,
+  );
+}
+
 export function logApiRequest(config: Config, event: ApiRequestEvent): void {
   ClearcutLogger.getInstance(config)?.logApiRequestEvent(event);
   if (!isTelemetrySdkInitialized()) return;

packages/core/src/telemetry/metrics.ts

@@ -210,6 +210,7 @@ export function recordFileOperationMetric(
   mimetype?: string,
   extension?: string,
   diffStat?: DiffStat,
+  programming_language?: string,
 ): void {
   if (!fileOperationCounter || !isMetricsInitialized) return;
   const attributes: Attributes = {
@@ -225,5 +226,8 @@ export function recordFileOperationMetric(
     attributes['user_added_lines'] = diffStat.user_added_lines;
     attributes['user_removed_lines'] = diffStat.user_removed_lines;
   }
+  if (programming_language !== undefined) {
+    attributes['programming_language'] = programming_language;
+  }
   fileOperationCounter.add(1, attributes);
 }

packages/core/src/telemetry/telemetry-utils.test.ts

@@ -0,0 +1,46 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { describe, it, expect } from 'vitest';
+import { getProgrammingLanguage } from './telemetry-utils.js';
+
+describe('getProgrammingLanguage', () => {
+  it('should return the programming language when file_path is present', () => {
+    const args = { file_path: 'src/test.ts' };
+    const language = getProgrammingLanguage(args);
+    expect(language).toBe('TypeScript');
+  });
+
+  it('should return the programming language when absolute_path is present', () => {
+    const args = { absolute_path: 'src/test.py' };
+    const language = getProgrammingLanguage(args);
+    expect(language).toBe('Python');
+  });
+
+  it('should return the programming language when path is present', () => {
+    const args = { path: 'src/test.go' };
+    const language = getProgrammingLanguage(args);
+    expect(language).toBe('Go');
+  });
+
+  it('should return undefined when no file path is present', () => {
+    const args = {};
+    const language = getProgrammingLanguage(args);
+    expect(language).toBeUndefined();
+  });
+
+  it('should handle unknown file extensions gracefully', () => {
+    const args = { file_path: 'src/test.unknown' };
+    const language = getProgrammingLanguage(args);
+    expect(language).toBeUndefined();
+  });
+
+  it('should handle files with no extension', () => {
+    const args = { file_path: 'src/test' };
+    const language = getProgrammingLanguage(args);
+    expect(language).toBeUndefined();
+  });
+});

packages/core/src/telemetry/telemetry-utils.ts

@@ -0,0 +1,17 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import { getLanguageFromFilePath } from '../utils/language-detection.js';
+
+export function getProgrammingLanguage(
+  args: Record<string, unknown>,
+): string | undefined {
+  const filePath = args['file_path'] || args['path'] || args['absolute_path'];
+  if (typeof filePath === 'string') {
+    return getLanguageFromFilePath(filePath);
+  }
+  return undefined;
+}

packages/core/src/telemetry/types.ts

@@ -8,12 +8,14 @@ import { GenerateContentResponseUsageMetadata } from '@google/genai';
 import { Config } from '../config/config.js';
 import { CompletedToolCall } from '../core/coreToolScheduler.js';
 import { DiscoveredMCPTool } from '../tools/mcp-tool.js';
-import { FileDiff } from '../tools/tools.js';
+import { DiffStat, FileDiff } from '../tools/tools.js';
 import { AuthType } from '../core/contentGenerator.js';
 import {
   getDecisionFromOutcome,
   ToolCallDecision,
 } from './tool-call-decision.js';
+import { FileOperation } from './metrics.js';
+export { ToolCallDecision };
 import { ToolRegistry } from '../tools/tool-registry.js';
 
 export interface BaseTelemetryEvent {
@@ -399,6 +401,38 @@ export class KittySequenceOverflowEvent {
   }
 }
 
+export class FileOperationEvent implements BaseTelemetryEvent {
+  'event.name': 'file_operation';
+  'event.timestamp': string;
+  tool_name: string;
+  operation: FileOperation;
+  lines?: number;
+  mimetype?: string;
+  extension?: string;
+  diff_stat?: DiffStat;
+  programming_language?: string;
+
+  constructor(
+    tool_name: string,
+    operation: FileOperation,
+    lines?: number,
+    mimetype?: string,
+    extension?: string,
+    diff_stat?: DiffStat,
+    programming_language?: string,
+  ) {
+    this['event.name'] = 'file_operation';
+    this['event.timestamp'] = new Date().toISOString();
+    this.tool_name = tool_name;
+    this.operation = operation;
+    this.lines = lines;
+    this.mimetype = mimetype;
+    this.extension = extension;
+    this.diff_stat = diff_stat;
+    this.programming_language = programming_language;
+  }
+}
+
 export type TelemetryEvent =
   | StartSessionEvent
   | EndSessionEvent
@@ -413,4 +447,5 @@ export type TelemetryEvent =
   | KittySequenceOverflowEvent
   | MalformedJsonResponseEvent
   | IdeConnectionEvent
-  | SlashCommandEvent;
+  | SlashCommandEvent
+  | FileOperationEvent;

packages/core/src/tools/edit.test.ts

@@ -26,6 +26,10 @@ vi.mock('../utils/editor.js', () => ({
   openDiff: mockOpenDiff,
 }));
 
+vi.mock('../telemetry/loggers.js', () => ({
+  logFileOperation: vi.fn(),
+}));
+
 import { describe, it, expect, beforeEach, afterEach, vi, Mock } from 'vitest';
 import { applyReplacement, EditTool, EditToolParams } from './edit.js';
 import { FileDiff, ToolConfirmationOutcome } from './tools.js';

packages/core/src/tools/edit.ts

@@ -27,6 +27,11 @@ import { DEFAULT_DIFF_OPTIONS, getDiffStat } from './diffOptions.js';
 import { ReadFileTool } from './read-file.js';
 import { ModifiableDeclarativeTool, ModifyContext } from './modifiable-tool.js';
 import { IDEConnectionStatus } from '../ide/ide-client.js';
+import { FileOperation } from '../telemetry/metrics.js';
+import { logFileOperation } from '../telemetry/loggers.js';
+import { FileOperationEvent } from '../telemetry/types.js';
+import { getProgrammingLanguage } from '../telemetry/telemetry-utils.js';
+import { getSpecificMimeType } from '../utils/fileUtils.js';
 
 export function applyReplacement(
   currentContent: string | null,
@@ -345,12 +350,21 @@ class EditToolInvocation implements ToolInvocation<EditToolParams, ToolResult> {
         .writeTextFile(this.params.file_path, editData.newContent);
 
       let displayResult: ToolResultDisplay;
+      const fileName = path.basename(this.params.file_path);
+      const originallyProposedContent =
+        this.params.ai_proposed_string || this.params.new_string;
+      const diffStat = getDiffStat(
+        fileName,
+        editData.currentContent ?? '',
+        originallyProposedContent,
+        this.params.new_string,
+      );
+
       if (editData.isNewFile) {
         displayResult = `Created ${shortenPath(makeRelative(this.params.file_path, this.config.getTargetDir()))}`;
       } else {
         // Generate diff for display, even though core logic doesn't technically need it
         // The CLI wrapper will use this part of the ToolResult
-        const fileName = path.basename(this.params.file_path);
         const fileDiff = Diff.createPatch(
           fileName,
           editData.currentContent ?? '', // Should not be null here if not isNewFile
@@ -359,14 +373,6 @@ class EditToolInvocation implements ToolInvocation<EditToolParams, ToolResult> {
           'Proposed',
           DEFAULT_DIFF_OPTIONS,
         );
-        const originallyProposedContent =
-          this.params.ai_proposed_string || this.params.new_string;
-        const diffStat = getDiffStat(
-          fileName,
-          editData.currentContent ?? '',
-          originallyProposedContent,
-          this.params.new_string,
-        );
         displayResult = {
           fileDiff,
           fileName,
@@ -387,6 +393,26 @@ class EditToolInvocation implements ToolInvocation<EditToolParams, ToolResult> {
         );
       }
 
+      const lines = editData.newContent.split('\n').length;
+      const mimetype = getSpecificMimeType(this.params.file_path);
+      const extension = path.extname(this.params.file_path);
+      const programming_language = getProgrammingLanguage({
+        file_path: this.params.file_path,
+      });
+
+      logFileOperation(
+        this.config,
+        new FileOperationEvent(
+          EditTool.Name,
+          editData.isNewFile ? FileOperation.CREATE : FileOperation.UPDATE,
+          lines,
+          mimetype,
+          extension,
+          diffStat,
+          programming_language,
+        ),
+      );
+
       return {
         llmContent: llmSuccessMessageParts.join(' '),
         returnDisplay: displayResult,

packages/core/src/tools/read-file.test.ts

@@ -4,7 +4,7 @@
  * SPDX-License-Identifier: Apache-2.0
  */
 
-import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
 import { ReadFileTool, ReadFileToolParams } from './read-file.js';
 import { ToolErrorType } from './tool-error.js';
 import path from 'path';
@@ -17,6 +17,10 @@ import { StandardFileSystemService } from '../services/fileSystemService.js';
 import { createMockWorkspaceContext } from '../test-utils/mockWorkspaceContext.js';
 import { ToolInvocation, ToolResult } from './tools.js';
 
+vi.mock('../telemetry/loggers.js', () => ({
+  logFileOperation: vi.fn(),
+}));
+
 describe('ReadFileTool', () => {
   let tempRootDir: string;
   let tool: ReadFileTool;

packages/core/src/tools/read-file.ts

@@ -21,10 +21,10 @@ import {
   getSpecificMimeType,
 } from '../utils/fileUtils.js';
 import { Config } from '../config/config.js';
-import {
-  recordFileOperationMetric,
-  FileOperation,
-} from '../telemetry/metrics.js';
+import { FileOperation } from '../telemetry/metrics.js';
+import { getProgrammingLanguage } from '../telemetry/telemetry-utils.js';
+import { logFileOperation } from '../telemetry/loggers.js';
+import { FileOperationEvent } from '../telemetry/types.js';
 
 /**
  * Parameters for the ReadFile tool
@@ -112,12 +112,20 @@ ${result.llmContent}`;
         ? result.llmContent.split('\n').length
         : undefined;
     const mimetype = getSpecificMimeType(this.params.absolute_path);
-    recordFileOperationMetric(
+    const programming_language = getProgrammingLanguage({
+      absolute_path: this.params.absolute_path,
+    });
+    logFileOperation(
       this.config,
-      FileOperation.READ,
-      lines,
-      mimetype,
-      path.extname(this.params.absolute_path),
+      new FileOperationEvent(
+        ReadFileTool.Name,
+        FileOperation.READ,
+        lines,
+        mimetype,
+        path.extname(this.params.absolute_path),
+        undefined,
+        programming_language,
+      ),
     );
 
     return {

packages/core/src/tools/read-many-files.test.ts

@@ -47,6 +47,10 @@ vi.mock('mime-types', () => {
   };
 });
 
+vi.mock('../telemetry/loggers.js', () => ({
+  logFileOperation: vi.fn(),
+}));
+
 describe('ReadManyFilesTool', () => {
   let tool: ReadManyFilesTool;
   let tempRootDir: string;

packages/core/src/tools/read-many-files.ts

@@ -25,10 +25,10 @@ import {
 } from '../utils/fileUtils.js';
 import { PartListUnion } from '@google/genai';
 import { Config, DEFAULT_FILE_FILTERING_OPTIONS } from '../config/config.js';
-import {
-  recordFileOperationMetric,
-  FileOperation,
-} from '../telemetry/metrics.js';
+import { FileOperation } from '../telemetry/metrics.js';
+import { getProgrammingLanguage } from '../telemetry/telemetry-utils.js';
+import { logFileOperation } from '../telemetry/loggers.js';
+import { FileOperationEvent } from '../telemetry/types.js';
 import { ToolErrorType } from './tool-error.js';
 
 /**
@@ -468,12 +468,20 @@ ${finalExclusionPatternsForDescription
               ? fileReadResult.llmContent.split('\n').length
               : undefined;
           const mimetype = getSpecificMimeType(filePath);
-          recordFileOperationMetric(
+          const programming_language = getProgrammingLanguage({
+            absolute_path: filePath,
+          });
+          logFileOperation(
             this.config,
-            FileOperation.READ,
-            lines,
-            mimetype,
-            path.extname(filePath),
+            new FileOperationEvent(
+              ReadManyFilesTool.Name,
+              FileOperation.READ,
+              lines,
+              mimetype,
+              path.extname(filePath),
+              undefined,
+              programming_language,
+            ),
           );
         }
       } else {

packages/core/src/tools/write-file.test.ts

@@ -88,6 +88,11 @@ const mockConfigInternal = {
     }) as unknown as ToolRegistry,
 };
 const mockConfig = mockConfigInternal as unknown as Config;
+
+vi.mock('../telemetry/loggers.js', () => ({
+  logFileOperation: vi.fn(),
+}));
+
 // --- END MOCKS ---
 
 describe('WriteFileTool', () => {

packages/core/src/tools/write-file.ts

@@ -30,11 +30,11 @@ import {
 import { DEFAULT_DIFF_OPTIONS, getDiffStat } from './diffOptions.js';
 import { ModifiableDeclarativeTool, ModifyContext } from './modifiable-tool.js';
 import { getSpecificMimeType } from '../utils/fileUtils.js';
-import {
-  recordFileOperationMetric,
-  FileOperation,
-} from '../telemetry/metrics.js';
+import { FileOperation } from '../telemetry/metrics.js';
 import { IDEConnectionStatus } from '../ide/ide-client.js';
+import { getProgrammingLanguage } from '../telemetry/telemetry-utils.js';
+import { logFileOperation } from '../telemetry/loggers.js';
+import { FileOperationEvent } from '../telemetry/types.js';
 
 /**
  * Parameters for the WriteFile tool
@@ -314,23 +314,32 @@ class WriteFileToolInvocation extends BaseToolInvocation<
       const lines = fileContent.split('\n').length;
       const mimetype = getSpecificMimeType(file_path);
       const extension = path.extname(file_path); // Get extension
+      const programming_language = getProgrammingLanguage({ file_path });
       if (isNewFile) {
-        recordFileOperationMetric(
+        logFileOperation(
           this.config,
-          FileOperation.CREATE,
-          lines,
-          mimetype,
-          extension,
-          diffStat,
+          new FileOperationEvent(
+            WriteFileTool.Name,
+            FileOperation.CREATE,
+            lines,
+            mimetype,
+            extension,
+            diffStat,
+            programming_language,
+          ),
         );
       } else {
-        recordFileOperationMetric(
+        logFileOperation(
           this.config,
-          FileOperation.UPDATE,
-          lines,
-          mimetype,
-          extension,
-          diffStat,
+          new FileOperationEvent(
+            WriteFileTool.Name,
+            FileOperation.UPDATE,
+            lines,
+            mimetype,
+            extension,
+            diffStat,
+            programming_language,
+          ),
         );
       }
 

packages/core/src/utils/language-detection.ts

@@ -0,0 +1,103 @@
+/**
+ * @license
+ * Copyright 2025 Google LLC
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+import * as path from 'path';
+
+const extensionToLanguageMap: { [key: string]: string } = {
+  '.ts': 'TypeScript',
+  '.js': 'JavaScript',
+  '.mjs': 'JavaScript',
+  '.cjs': 'JavaScript',
+  '.jsx': 'JavaScript',
+  '.tsx': 'TypeScript',
+  '.py': 'Python',
+  '.java': 'Java',
+  '.go': 'Go',
+  '.rb': 'Ruby',
+  '.php': 'PHP',
+  '.phtml': 'PHP',
+  '.cs': 'C#',
+  '.cpp': 'C++',
+  '.cxx': 'C++',
+  '.cc': 'C++',
+  '.c': 'C',
+  '.h': 'C/C++',
+  '.hpp': 'C++',
+  '.swift': 'Swift',
+  '.kt': 'Kotlin',
+  '.rs': 'Rust',
+  '.m': 'Objective-C',
+  '.mm': 'Objective-C',
+  '.pl': 'Perl',
+  '.pm': 'Perl',
+  '.lua': 'Lua',
+  '.r': 'R',
+  '.scala': 'Scala',
+  '.sc': 'Scala',
+  '.sh': 'Shell',
+  '.ps1': 'PowerShell',
+  '.bat': 'Batch',
+  '.cmd': 'Batch',
+  '.sql': 'SQL',
+  '.html': 'HTML',
+  '.htm': 'HTML',
+  '.css': 'CSS',
+  '.less': 'Less',
+  '.sass': 'Sass',
+  '.scss': 'Sass',
+  '.json': 'JSON',
+  '.xml': 'XML',
+  '.yaml': 'YAML',
+  '.yml': 'YAML',
+  '.md': 'Markdown',
+  '.markdown': 'Markdown',
+  '.dockerfile': 'Dockerfile',
+  '.vim': 'Vim script',
+  '.vb': 'Visual Basic',
+  '.fs': 'F#',
+  '.clj': 'Clojure',
+  '.cljs': 'Clojure',
+  '.dart': 'Dart',
+  '.ex': 'Elixir',
+  '.erl': 'Erlang',
+  '.hs': 'Haskell',
+  '.lisp': 'Lisp',
+  '.rkt': 'Racket',
+  '.groovy': 'Groovy',
+  '.jl': 'Julia',
+  '.tex': 'LaTeX',
+  '.ino': 'Arduino',
+  '.asm': 'Assembly',
+  '.s': 'Assembly',
+  '.toml': 'TOML',
+  '.vue': 'Vue',
+  '.svelte': 'Svelte',
+  '.gohtml': 'Go Template',
+  '.hbs': 'Handlebars',
+  '.ejs': 'EJS',
+  '.erb': 'ERB',
+  '.jsp': 'JSP',
+  '.dockerignore': 'Docker',
+  '.gitignore': 'Git',
+  '.npmignore': 'npm',
+  '.editorconfig': 'EditorConfig',
+  '.prettierrc': 'Prettier',
+  '.eslintrc': 'ESLint',
+  '.babelrc': 'Babel',
+  '.tsconfig': 'TypeScript',
+  '.flow': 'Flow',
+  '.graphql': 'GraphQL',
+  '.proto': 'Protocol Buffers',
+};
+
+export function getLanguageFromFilePath(filePath: string): string | undefined {
+  const extension = path.extname(filePath).toLowerCase();
+  if (extension) {
+    return extensionToLanguageMap[extension];
+  }
+  const filename = path.basename(filePath).toLowerCase();
+  return extensionToLanguageMap[`.${filename}`];
+}