fix: guard quoted home paths in shell tool

nanobot/agent/tools/shell.py

@@ -155,6 +155,6 @@ class ExecTool(Tool):
     @staticmethod
     def _extract_absolute_paths(command: str) -> list[str]:
         win_paths = re.findall(r"[A-Za-z]:\\[^\s\"'|><;]+", command)   # Windows: C:\...
-        posix_paths = re.findall(r"(?:^|[\s|>])(/[^\s\"'>]+)", command) # POSIX: /absolute only
-        home_paths = re.findall(r"(?:^|[\s|>])(~[^\s\"'>;|<]*)", command) # POSIX/Windows home shortcut: ~
+        posix_paths = re.findall(r"(?:^|[\s|>'\"])(/[^\s\"'>;|<]+)", command) # POSIX: /absolute only
+        home_paths = re.findall(r"(?:^|[\s|>'\"])(~[^\s\"'>;|<]*)", command) # POSIX/Windows home shortcut: ~
         return win_paths + posix_paths + home_paths

tests/test_tool_validation.py

@@ -115,12 +115,25 @@ def test_exec_extract_absolute_paths_captures_home_paths() -> None:
     assert "~/out.txt" in paths
 
 
+def test_exec_extract_absolute_paths_captures_quoted_paths() -> None:
+    cmd = 'cat "/tmp/data.txt" "~/.nanobot/config.json"'
+    paths = ExecTool._extract_absolute_paths(cmd)
+    assert "/tmp/data.txt" in paths
+    assert "~/.nanobot/config.json" in paths
+
+
 def test_exec_guard_blocks_home_path_outside_workspace(tmp_path) -> None:
     tool = ExecTool(restrict_to_workspace=True)
     error = tool._guard_command("cat ~/.nanobot/config.json", str(tmp_path))
     assert error == "Error: Command blocked by safety guard (path outside working dir)"
 
 
+def test_exec_guard_blocks_quoted_home_path_outside_workspace(tmp_path) -> None:
+    tool = ExecTool(restrict_to_workspace=True)
+    error = tool._guard_command('cat "~/.nanobot/config.json"', str(tmp_path))
+    assert error == "Error: Command blocked by safety guard (path outside working dir)"
+
+
 # --- cast_params tests ---