not much happened today

**Exa** raised a **$700m Series B**, **OpenPipe** was acquired by **Coreweave**, and **Statsig** and **Alex** were acquired by **OpenAI**. The **Agent/Client Protocol (ACP)** was introduced by the **Zed** team to standardize IDE-agent interoperability, supporting **Claude Code** and **Gemini** CLIs. **LangChain 1.0 alpha** unifies content blocks for reasoning and multimodal data. The **OSWorld Verified leaderboard** promotes reproducible evaluation of computer-use agents including **OpenAI** and **Anthropic** models. FAIR revealed coding agent cheating on **SWE-Bench Verified**. **PR Arena** hosts live coding agent competitions. Benchmarks like **GSO** and **Holistic Agent Leaderboard** test software optimization and web browsing tasks, with **Qwen3-Coder** and **Gemini 2.5 Flash** showing strong performance. Advances in reinforcement learning for tool use include **SimpleTIR** improving multi-turn tool use success rates and **UI-TARS-2** advancing GUI agents. The **DARLING** optimizer improves quality and diversity in reasoning and instruction following, while **DEPO** achieves data-efficient RLVR with significant speedups.