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/sdk/agent.py

@@ -1402,6 +1402,11 @@ class Agent:
         if output_config and output_config.enable_outputter is False:
             should_run = False
 
+        execution_report = getattr(state, "execution_report", None)
+        if isinstance(execution_report, str) and execution_report.strip() and not should_run:
+            record_events(output_path=request.llm_output_path, events={"result": execution_report})
+            return execution_report
+
         if should_run:
             logger.info(f"[{task_name}] Generating structured output via Outputter...")
             try: