diff --git a/src/infrastructure/logging/factory.ts b/src/infrastructure/logging/factory.ts
index 3104b3ca..41a56a2d 100644
--- a/src/infrastructure/logging/factory.ts
+++ b/src/infrastructure/logging/factory.ts
@@ -1,5 +1,5 @@
-import * as os from 'node:os';
 import * as path from 'node:path';
+import { execFileSync } from 'node:child_process';
 import { ILogger, ILoggerOptions, LogLevel } from '../../domain/interfaces/ILogger';
 import { Logger } from './Logger';
 import { NullLogger } from './NullLogger';
@@ -10,8 +10,20 @@ function isValidLogLevel(value: string): value is LogLevel {
   return VALID_LEVELS.includes(value as LogLevel);
 }
 
+function getGitRoot(): string | null {
+  try {
+    return execFileSync('git', ['rev-parse', '--show-toplevel'], {
+      encoding: 'utf8',
+      stdio: ['pipe', 'pipe', 'pipe'],
+    }).trim();
+  } catch {
+    return null;
+  }
+}
+
 export function defaultLogDir(): string {
-  return path.join(os.homedir(), '.git-mem', 'logs');
+  const base = getGitRoot() ?? process.cwd();
+  return path.join(base, '.git-mem', 'logs');
 }
 
 export function loadLoggerOptions(): ILoggerOptions {
diff --git a/tests/unit/infrastructure/logging/factory.test.ts b/tests/unit/infrastructure/logging/factory.test.ts
index d3366819..5e56d697 100644
--- a/tests/unit/infrastructure/logging/factory.test.ts
+++ b/tests/unit/infrastructure/logging/factory.test.ts
@@ -1,5 +1,7 @@
 import { describe, it, before, after } from 'node:test';
 import assert from 'node:assert/strict';
+import { join } from 'path';
+import { execFileSync } from 'child_process';
 import { createLogger, createNullLogger, defaultLogDir, loadLoggerOptions } from '../../../../src/infrastructure/logging/factory';
 import { Logger } from '../../../../src/infrastructure/logging/Logger';
 import { NullLogger } from '../../../../src/infrastructure/logging/NullLogger';
@@ -27,6 +29,16 @@ describe('Logging factory', () => {
     }
   });
 
+  describe('defaultLogDir', () => {
+    it('should return .git-mem/logs under the git root', () => {
+      const gitRoot = execFileSync('git', ['rev-parse', '--show-toplevel'], {
+        encoding: 'utf8',
+      }).trim();
+
+      assert.equal(defaultLogDir(), join(gitRoot, '.git-mem', 'logs'));
+    });
+  });
+
   describe('loadLoggerOptions', () => {
     it('should return defaults when no env vars set', () => {
       delete process.env['LOG_LEVEL'];