not much happened today

**Anthropic** introduced **Claude Cowork** and **Claude Code** enabling desktop control of mouse, keyboard, and screen in a **macOS research preview**, expanding agent capabilities beyond APIs and browsers. The agent ecosystem is evolving towards long-running, parallel, tool-rich workflows with projects like **Hermes Agent**, **T3 Code**, **Command Center**, and **Parchi** enhancing multi-agent orchestration and autonomous task management. Operational challenges such as fragility and inefficiency in subagents, including **GPT-5.2 Pro** and **Claude** browser/computer use, highlight the need for closed-loop feedback systems. Research from **Meta AI** advances self-improving agents with **Hyperagents / DGM-H** enabling meta-level procedural improvements, and unifies reinforcement learning post-training with **RLLM** (RL + LM-as-RM) to improve reward modeling across task types. Additionally, **WebArena-Infinity** drastically reduces browser environment construction costs, accelerating benchmark and environment generation.