fix(shell): parse full Windows absolute paths in workspace guard

nanobot/agent/tools/shell.py

@@ -134,13 +134,7 @@ class ExecTool(Tool):
 
             cwd_path = Path(cwd).resolve()
 
-            win_paths = re.findall(r"[A-Za-z]:\\[^\\\"']+", cmd)
+            for raw in self._extract_absolute_paths(cmd):
-            # Only match absolute paths — avoid false positives on relative
-            # paths like ".venv/bin/python" where "/bin/python" would be
-            # incorrectly extracted by the old pattern.
-            posix_paths = re.findall(r"(?:^|[\s|>])(/[^\s\"'>]+)", cmd)
-
-            for raw in win_paths + posix_paths:
                 try:
                     p = Path(raw.strip()).resolve()
                 except Exception:
@@ -149,3 +143,13 @@ class ExecTool(Tool):
                     return "Error: Command blocked by safety guard (path outside working dir)"
 
         return None
+
+    @staticmethod
+    def _extract_absolute_paths(command: str) -> list[str]:
+        # Match Windows absolute paths without truncating at backslashes.
+        win_paths = re.findall(r"[A-Za-z]:\\[^\s\"'|><;]+", command)
+        # Only match absolute paths — avoid false positives on relative
+        # paths like ".venv/bin/python" where "/bin/python" would be
+        # incorrectly extracted by the old pattern.
+        posix_paths = re.findall(r"(?:^|[\s|>])(/[^\s\"'>]+)", command)
+        return win_paths + posix_paths

tests/test_tool_validation.py

@@ -2,6 +2,7 @@ from typing import Any
 
 from nanobot.agent.tools.base import Tool
 from nanobot.agent.tools.registry import ToolRegistry
+from nanobot.agent.tools.shell import ExecTool
 
 
 class SampleTool(Tool):
@@ -86,3 +87,22 @@ async def test_registry_returns_validation_error() -> None:
     reg.register(SampleTool())
     result = await reg.execute("sample", {"query": "hi"})
     assert "Invalid parameters" in result
+
+
+def test_exec_extract_absolute_paths_keeps_full_windows_path() -> None:
+    cmd = r"type C:\user\workspace\txt"
+    paths = ExecTool._extract_absolute_paths(cmd)
+    assert paths == [r"C:\user\workspace\txt"]
+
+
+def test_exec_extract_absolute_paths_ignores_relative_posix_segments() -> None:
+    cmd = ".venv/bin/python script.py"
+    paths = ExecTool._extract_absolute_paths(cmd)
+    assert "/bin/python" not in paths
+
+
+def test_exec_extract_absolute_paths_captures_posix_absolute_paths() -> None:
+    cmd = "cat /tmp/data.txt > /tmp/out.txt"
+    paths = ExecTool._extract_absolute_paths(cmd)
+    assert "/tmp/data.txt" in paths
+    assert "/tmp/out.txt" in paths