diff --git a/src/cli/cliRun.ts b/src/cli/cliRun.ts
index a97ab2aca..384af84d6 100644
--- a/src/cli/cliRun.ts
+++ b/src/cli/cliRun.ts
@@ -2,6 +2,7 @@ import process from 'node:process';
 import { Option, program } from 'commander';
 import pc from 'picocolors';
 import { getVersion } from '../core/file/packageJsonParse.js';
+import { isExplicitRemoteUrl } from '../core/git/gitRemoteParse.js';
 import { handleError, RepomixError } from '../shared/errorHandle.js';
 import { logger, repomixLogLevels } from '../shared/logger.js';
 import { parseHumanSizeToBytes } from '../shared/sizeParse.js';
@@ -275,5 +276,11 @@ export const runCli = async (directories: string[], cwd: string, options: CliOpt
     return await runRemoteAction(options.remote, options);
   }
 
+  // Auto-detect explicit remote URLs (https://, git@, ssh://, git://) in positional arguments
+  if (directories.length === 1 && isExplicitRemoteUrl(directories[0])) {
+    logger.trace(`Auto-detected remote URL from positional argument: ${directories[0]}`);
+    return await runRemoteAction(directories[0], options);
+  }
+
   return await runDefaultAction(directories, cwd, options);
 };
diff --git a/src/core/git/gitRemoteParse.ts b/src/core/git/gitRemoteParse.ts
index 323294949..fc027d022 100644
--- a/src/core/git/gitRemoteParse.ts
+++ b/src/core/git/gitRemoteParse.ts
@@ -112,6 +112,14 @@ export const parseRemoteValue = (
   }
 };
 
+/**
+ * Checks if a string is an explicit remote URL (e.g., https://, git@, ssh://, git://).
+ * This intentionally does NOT match shorthand (owner/repo) to avoid ambiguity with local directory paths.
+ */
+export const isExplicitRemoteUrl = (value: string): boolean => {
+  return ['https://', 'git@', 'ssh://', 'git://'].some((prefix) => value.startsWith(prefix));
+};
+
 export const isValidRemoteValue = (remoteValue: string, refs: string[] = []): boolean => {
   try {
     parseRemoteValue(remoteValue, refs);
diff --git a/src/index.ts b/src/index.ts
index 7a695c5d2..72a740ba1 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -13,7 +13,12 @@ export type { FileSearchResult } from './core/file/fileSearch.js';
 export { generateFileTree, generateTreeString, treeToString, type TreeNode } from './core/file/fileTreeGenerate.js';
 
 // Git
-export { isValidRemoteValue, isValidShorthand, parseRemoteValue } from './core/git/gitRemoteParse.js';
+export {
+  isExplicitRemoteUrl,
+  isValidRemoteValue,
+  isValidShorthand,
+  parseRemoteValue,
+} from './core/git/gitRemoteParse.js';
 
 // Security
 export { runSecurityCheck } from './core/security/securityCheck.js';
diff --git a/tests/cli/cliRun.test.ts b/tests/cli/cliRun.test.ts
index 084f88416..aeab8f4c9 100644
--- a/tests/cli/cliRun.test.ts
+++ b/tests/cli/cliRun.test.ts
@@ -209,6 +209,52 @@ describe('cliRun', () => {
       expect(remoteAction.runRemoteAction).toHaveBeenCalledWith('yamadashy/repomix', expect.any(Object));
       expect(defaultAction.runDefaultAction).not.toHaveBeenCalled();
     });
+
+    test('should auto-detect HTTPS URL and execute remote action', async () => {
+      await runCli(['https://github.com/user/repo'], process.cwd(), {});
+
+      expect(remoteAction.runRemoteAction).toHaveBeenCalledWith('https://github.com/user/repo', expect.any(Object));
+      expect(defaultAction.runDefaultAction).not.toHaveBeenCalled();
+    });
+
+    test('should auto-detect git@ SSH URL and execute remote action', async () => {
+      await runCli(['git@github.com:user/repo.git'], process.cwd(), {});
+
+      expect(remoteAction.runRemoteAction).toHaveBeenCalledWith('git@github.com:user/repo.git', expect.any(Object));
+      expect(defaultAction.runDefaultAction).not.toHaveBeenCalled();
+    });
+
+    test('should auto-detect ssh:// URL and execute remote action', async () => {
+      await runCli(['ssh://git@github.com/user/repo.git'], process.cwd(), {});
+
+      expect(remoteAction.runRemoteAction).toHaveBeenCalledWith(
+        'ssh://git@github.com/user/repo.git',
+        expect.any(Object),
+      );
+      expect(defaultAction.runDefaultAction).not.toHaveBeenCalled();
+    });
+
+    test('should auto-detect git:// URL and execute remote action', async () => {
+      await runCli(['git://github.com/user/repo.git'], process.cwd(), {});
+
+      expect(remoteAction.runRemoteAction).toHaveBeenCalledWith('git://github.com/user/repo.git', expect.any(Object));
+      expect(defaultAction.runDefaultAction).not.toHaveBeenCalled();
+    });
+
+    test('should not auto-detect shorthand format as remote URL', async () => {
+      await runCli(['user/repo'], process.cwd(), {});
+
+      expect(defaultAction.runDefaultAction).toHaveBeenCalledWith(['user/repo'], process.cwd(), expect.any(Object));
+      expect(remoteAction.runRemoteAction).not.toHaveBeenCalled();
+    });
+
+    test('should prioritize explicit --remote flag over auto-detected URL', async () => {
+      await runCli(['https://github.com/other/repo'], process.cwd(), {
+        remote: 'yamadashy/repomix',
+      });
+
+      expect(remoteAction.runRemoteAction).toHaveBeenCalledWith('yamadashy/repomix', expect.any(Object));
+    });
   });
 
   describe('parsable style flag', () => {
diff --git a/tests/core/git/gitRemoteParse.test.ts b/tests/core/git/gitRemoteParse.test.ts
index d8959d54f..643ffd92a 100644
--- a/tests/core/git/gitRemoteParse.test.ts
+++ b/tests/core/git/gitRemoteParse.test.ts
@@ -1,5 +1,10 @@
 import { beforeEach, describe, expect, test, vi } from 'vitest';
-import { isGitHubRepository, parseGitHubRepoInfo, parseRemoteValue } from '../../../src/core/git/gitRemoteParse.js';
+import {
+  isExplicitRemoteUrl,
+  isGitHubRepository,
+  parseGitHubRepoInfo,
+  parseRemoteValue,
+} from '../../../src/core/git/gitRemoteParse.js';
 import { isValidRemoteValue } from '../../../src/index.js';
 
 vi.mock('../../../src/shared/logger');
@@ -264,6 +269,50 @@ describe('remoteAction functions', () => {
     });
   });
 
+  describe('isExplicitRemoteUrl', () => {
+    test('should return true for HTTPS URLs', () => {
+      expect(isExplicitRemoteUrl('https://github.com/user/repo')).toBe(true);
+      expect(isExplicitRemoteUrl('https://gitlab.com/user/repo')).toBe(true);
+      expect(isExplicitRemoteUrl('https://bitbucket.org/user/repo')).toBe(true);
+    });
+
+    test('should return true for git@ SSH URLs', () => {
+      expect(isExplicitRemoteUrl('git@github.com:user/repo.git')).toBe(true);
+      expect(isExplicitRemoteUrl('git@gitlab.com:user/repo.git')).toBe(true);
+      expect(isExplicitRemoteUrl('git@ssh.dev.azure.com:v3/org/project/repo')).toBe(true);
+    });
+
+    test('should return true for ssh:// URLs', () => {
+      expect(isExplicitRemoteUrl('ssh://git@github.com/user/repo.git')).toBe(true);
+      expect(isExplicitRemoteUrl('ssh://git@gitlab.com/user/repo.git')).toBe(true);
+    });
+
+    test('should return true for git:// URLs', () => {
+      expect(isExplicitRemoteUrl('git://github.com/user/repo.git')).toBe(true);
+      expect(isExplicitRemoteUrl('git://gitlab.com/user/repo.git')).toBe(true);
+    });
+
+    test('should return false for shorthand format', () => {
+      expect(isExplicitRemoteUrl('user/repo')).toBe(false);
+      expect(isExplicitRemoteUrl('yamadashy/repomix')).toBe(false);
+    });
+
+    test('should return false for local paths', () => {
+      expect(isExplicitRemoteUrl('.')).toBe(false);
+      expect(isExplicitRemoteUrl('./src')).toBe(false);
+      expect(isExplicitRemoteUrl('/absolute/path')).toBe(false);
+      expect(isExplicitRemoteUrl('relative/path')).toBe(false);
+    });
+
+    test('should return false for http:// URLs', () => {
+      expect(isExplicitRemoteUrl('http://example.com/repo')).toBe(false);
+    });
+
+    test('should return false for empty string', () => {
+      expect(isExplicitRemoteUrl('')).toBe(false);
+    });
+  });
+
   describe('isGitHubRepository', () => {
     test('should return true for GitHub repositories', () => {
       expect(isGitHubRepository('yamadashy/repomix')).toBe(true);