chore: import upstream snapshot with attribution

tools/computer_use_tool.py

@@ -0,0 +1,39 @@
+"""Shim for tool discovery. Registers `computer_use` with tools.registry.
+
+The real implementation lives in the `tools/computer_use/` package to keep
+the file structure clean. This shim exists because tools.registry auto-imports
+`tools/*.py` — we need a top-level module to trigger the registration.
+"""
+
+from __future__ import annotations
+
+from tools.computer_use.schema import COMPUTER_USE_SCHEMA
+from tools.computer_use.tool import (
+    check_computer_use_requirements,
+    handle_computer_use,
+    set_approval_callback,
+)
+from tools.registry import registry
+
+
+registry.register(
+    name="computer_use",
+    toolset="computer_use",
+    schema=COMPUTER_USE_SCHEMA,
+    handler=lambda args, **kw: handle_computer_use(args, **kw),
+    check_fn=check_computer_use_requirements,
+    requires_env=[],
+    description=(
+        "Universal desktop control via cua-driver (macOS, Windows, Linux). Works with any "
+        "tool-capable model (Anthropic, OpenAI, OpenRouter, local vLLM, "
+        "etc.). Background computer-use: does NOT steal the user's cursor "
+        "or keyboard focus."
+    ),
+)
+
+
+__all__ = [
+    "handle_computer_use",
+    "set_approval_callback",
+    "check_computer_use_requirements",
+]