Multi-agent team collaboration for DeepSeek Harness

Key features

• Create reusable assistants for planning, coding, testing, review, documentation, or any other role.
• Member tabsshow or hide conversations.
• The Leader creates tasks and assigns them to member instances.
• Add memberstarts a new independent member from an assistant snapshot and notifies the Leader.
• Mix providers and models in one team—for example, a Codex Leader with GLM coding members.