July 2026 monthly summary for ModelEngine-Group/nexent: Implemented a system-managed parallel execution framework to accelerate concurrent agent tasks. Delivered the ParallelExecutorTool enabling concurrent execution of independent subtasks with per-task timeouts and robust exception isolation. Backend auto-injected the tool during agent config and prompt generation; SDK updates support 2-tuple and 3-tuple calling modes. Updated prompts and added 3 few-shot examples to guide parallelization strategies. Expanded test coverage with 13 unit tests for _parallel_executor and related suites. Resolved reliability issues in prompt_service (handling empty tool_ids) and mock resets in create_agent_config tests, improving CI stability. Overall, these changes reduced latency for parallelizable workflows, improved scalability of agent orchestration, and demonstrated proficiency in concurrency design, prompt engineering, and robust testing.