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Person: "simonwillison"
Claude Agent Skills - glorified AGENTS.md? or MCP killer?
claude-4.5-haiku claude chatgpt huggingchat-omni anthropic openai microsoft perplexity-ai huggingface groq cerebras togethercompute agent-skills document-processing long-context reasoning multi-model-routing memory-management voice vision simonwillison alexalbert__ mustafasuleyman yusuf_i_mehdi aravsrinivas
Anthropic achieves a rare feat with back-to-back AI news headlines featuring Claude's new Skills—a novel way to build specialized agents using Markdown files, scripts, and metadata to handle tasks like creating and reading PDFs, Docs, and PPTs. Simon Willison calls this a "bigger deal than MCP," predicting a "Cambrian explosion in Skills." Meanwhile, Anthropic launches Claude 4.5 Haiku with strong reasoning and long-context capabilities, priced competitively. Other updates include OpenAI's ChatGPT memory management improvements, Windows 11 Copilot voice and vision features, and HuggingChat Omni routing across 115 open-source models from 15 providers. These developments highlight advances in agent skills, document processing, long-context reasoning, and multi-model routing.