This includes agent harnesses and SDKs (e.g., Claude Code / Claude Agent SDK, OpenAI Agents SDK, LangChain, or equivalent), multi-step tool-using agents, subagent orchestration, and context and memory management across long-running tasks. Own technical design and implementation for assigned AI products, including model selection, orchestration, context management, retrieval, tools, memory, APIs, and integrations, within the broader Engineerure established by the Lead AI Engineer.