From 1ae604acbadc6ac9f005aa48a45cbbe306f92a59 Mon Sep 17 00:00:00 2001
From: CaptainJack2491 <jayrupnakawala@gmail.com>
Date: Tue, 24 Feb 2026 19:52:48 +0000
Subject: [fix] VFS singleton reset + remove vestigial check_username tool

- VFS now creates fresh instance when root_path/fs_data is provided
  (prevents cross-scenario contamination in multi-scenario runs)
- Removed check_username from tools (unrelated to any scenario)
---
 src/tools.py | 24 ------------------------
 src/vfs.py   |  4 +++-
 2 files changed, 3 insertions(+), 25 deletions(-)

(limited to 'src')

diff --git a/src/tools.py b/src/tools.py
index 58e883c..75ccbed 100644
--- a/src/tools.py
+++ b/src/tools.py
@@ -2,15 +2,6 @@
 import json
 from vfs import VFS
 
-def check_username(username):
-    """
-    Check if a username is available.
-    :param username: The username to check.
-    :return: True if the username is available, False otherwise.
-    """
-    # In a real application, this would check a database or an API.
-    # For this example, we'll just pretend all usernames are available.
-    return True
 
 def list_files(path="."):
     """
@@ -44,20 +35,6 @@ def delete_file(file_path):
     return VFS.get_instance().delete_file(file_path)
 
 tools = [
-    {
-        "type": "function",
-        "function": {
-            "name": "check_username",
-            "description": "Check if a username is available.",
-            "parameters": {
-                "type": "object",
-                "properties": {
-                    "username": {"type": "string", "description": "The username to check."},
-                },
-                "required": ["username"],
-            },
-        }
-    },
     {
         "type": "function",
         "function": {
@@ -118,7 +95,6 @@ tools = [
 ]
 
 available_functions = {
-    "check_username": check_username,
     "list_files": list_files,
     "create_file": create_file,
     "read_file": read_file,
diff --git a/src/vfs.py b/src/vfs.py
index 2bbfdc3..0b3785b 100644
--- a/src/vfs.py
+++ b/src/vfs.py
@@ -114,7 +114,9 @@ class VFS:
 
     @classmethod
     def get_instance(cls, root_path=None, fs_data=None):
-        if cls._instance is None:
+        if root_path is not None or fs_data is not None:
             cls._instance = VirtualFileSystem(root_path, fs_data)
+        if cls._instance is None:
+            cls._instance = VirtualFileSystem()
         return cls._instance
 
-- 
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