Requirements Engineering (RE) is an initial and critical phase in software development, with the aim of producing well-defined software requirements specifications (SRSs) from rough ideas of clients. It involves multiple tasks (e.g., elicitation, analysis) and roles (e.g., interviewer, analyst). With the rise of Large Language Models (LLMs), many studies have leveraged LLMs to support specific RE tasks. However, existing LLM-based agents often lack domain knowledge integration and fall short in simulating the complex collaboration of human experts across the full RE process. To address this gap, we propose \ours{}, a knowledge-guided multi-agent framework designed to assist requirements engineers in developing high-quality SRSs. \ours{} comprises six LLM-based agents and a shared artifact pool. Each agent is equipped with predefined actions, dedicated functions, and injected knowledge tailored to specific RE tasks. The artifact pool stores both intermediate and final artifacts, serving as a communication channel for inter-agent collaboration. A human-in-the-loop (HITL) mechanism is embedded to guide and validate agent outputs. We present the design of \ours{}, along with preliminary experiments and a case study to demonstrate its practicality. This work lays the foundation for future research on knowledge-driven multi-agent collaboration in RE and highlights key challenges in building trustworthy intelligent assistants for real-world RE tasks.