Meta Acquires Moltbook, Openai Releases GPT 5.4, TypeScript Is #1 on GitHub (This Week In AI)

A lot happened in eight days. Meta acquired Moltbook, a social network built entirely for AI agents, not humans. OpenAI dropped GPT-5.4 Thinking and GPT-5.4 Pro, Codex got forks for multi-agent workflows and Windows support, and there are rumblings of OpenAI building a GitHub alternative. Anthropic fired back hard — multi-agent PR code review for Claude Code, while loops via /loop, the Claude Marketplace, and a way to pull your context from other AI tools.