Skip draft vision when Dota 2 is not the foreground window.

Prevents Alt-Tab desktop frames from advancing confirm streaks or burning strategy_tail polls.

Co-authored-by: Cursor <cursoragent@cursor.com>

capture.py

@@ -21,6 +21,53 @@ import numpy as np
 
 RAW_DIR = Path(__file__).parent / "samples" / "raw"
 GSI_JSONL = "gsi.jsonl"
+DOTA_EXE = "dota2.exe"
+
+
+def is_dota_foreground() -> bool:
+    """True when the foreground process is dota2.exe.
+
+    Uses Win32 GetForegroundWindow + QueryFullProcessImageNameW. On non-Windows
+    or if the probe fails, returns True so recognition is not blocked.
+    """
+    if sys.platform != "win32":
+        return True
+    try:
+        import ctypes
+        from ctypes import wintypes
+
+        user32 = ctypes.WinDLL("user32", use_last_error=True)
+        kernel32 = ctypes.WinDLL("kernel32", use_last_error=True)
+
+        hwnd = user32.GetForegroundWindow()
+        if not hwnd:
+            return False
+
+        pid = wintypes.DWORD()
+        user32.GetWindowThreadProcessId(hwnd, ctypes.byref(pid))
+        if not pid.value:
+            return False
+
+        PROCESS_QUERY_LIMITED_INFORMATION = 0x1000
+        handle = kernel32.OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION, False, pid.value)
+        if not handle:
+            return False
+        try:
+            buf = ctypes.create_unicode_buffer(32768)
+            size = wintypes.DWORD(len(buf))
+            # QueryFullProcessImageNameW(hProcess, dwFlags, lpExeName, lpdwSize)
+            QueryFullProcessImageNameW = kernel32.QueryFullProcessImageNameW
+            QueryFullProcessImageNameW.argtypes = [
+                wintypes.HANDLE, wintypes.DWORD, wintypes.LPWSTR, ctypes.POINTER(wintypes.DWORD)
+            ]
+            QueryFullProcessImageNameW.restype = wintypes.BOOL
+            if not QueryFullProcessImageNameW(handle, 0, buf, ctypes.byref(size)):
+                return False
+            return Path(buf.value).name.lower() == DOTA_EXE
+        finally:
+            kernel32.CloseHandle(handle)
+    except Exception:
+        return True
 
 
 def raw_dir_for_match(match_id: str | None = None) -> Path: