feat: add official Codex skill and harden task execution

Install and update artemis-use with task diagnostics and plugin guidance. Preserve cross-device file receipts, review canonical reports, guard stage transitions and reduce small history summaries. Improve exploration lifecycle, request recovery and browser live connections.

artemis/mcp/action_executor.py

@@ -74,7 +74,9 @@ __all__ = ["McpActionExecutor"]
 
 #: Non-device tools executed agent-side (never behind the action server).
 AGENT_TOOL_NAMES: frozenset[str] = (
-    frozenset({"read_note", "list_notes", "ask_explorer", "video_analyzer", "android_file"})
+    frozenset(
+        {"read_note", "list_notes", "save_note", "ask_explorer", "video_analyzer", "android_file"}
+    )
     | HISTORY_TOOL_NAMES
 )
 
@@ -764,6 +766,8 @@ class McpActionExecutor:
                 )
             elif raw_name == "list_notes":
                 text = await self._list_notes()
+            elif raw_name == "save_note":
+                text = await self._save_note(args)
             elif raw_name == "video_analyzer":
                 text, ok = await self._video_analyzer(
                     args.get("time_description") or args.get("TimeDescription") or "",
@@ -801,6 +805,23 @@ class McpActionExecutor:
             raw_result=blocks,
         )
 
+    async def _save_note(self, args: dict) -> str:
+        from artemis.core.tool_failure import ToolFailure
+        from artemis.tools.scratchpad import SaveNoteArgs
+        from artemis.utils.notes import save_verified_note
+
+        try:
+            value = SaveNoteArgs.model_validate(args)
+            base_dir = getattr(self.ctx.data_engine, "base_dir", None)
+            if not isinstance(base_dir, (str, Path)):
+                raise ValueError("当前任务没有可用的 trace 目录")
+            if value.key.lower().removesuffix(".md") == "output":
+                raise ValueError("output 由最终答复自动保存；独立报告请使用 report 等其他 key")
+            receipt = save_verified_note(base_dir, value.key, value.content)
+            return json.dumps(receipt, ensure_ascii=False)
+        except (OSError, ValueError) as exc:
+            return ToolFailure(f"任务文本保存失败：{exc}")
+
     async def _read_note(self, key: str, start_line: int | None, end_line: int | None) -> str:
         try:
             base_dir = self.ctx.data_engine.base_dir if self.ctx.data_engine else None