A Saturday show that leans into the long reads. Tim Gowers — yes, the Fields Medalist — sat down with ChatGPT 5.5 Pro and an open paper from Mel Nathanson and walked away with a result the original author called "original and clever." We follow that thread, then turn to Mozilla's deeper write-up on the Firefox 271-bug release, Jeff Kaufman on what AI is doing to disclosure embargoes, Anthropic on why constitution training beats demonstration training, and a beautiful pentest story about a critical RCE in React itself. Plus a quieter set of items: Codex in real Chrome, DHH's Copilot review hit-rate jump, a SysMoBench paper on LLM-generated TLA+ specs, AI2's document-routed mixture-of-experts model, and Qwen 35B-A3B running on a 3060.

• Tim Gowers — A recent experience with ChatGPT 5.5 Pro
• Mozilla — Behind the Scenes Hardening Firefox
• Jeff Kaufman — AI is Breaking Two Vulnerability Cultures
• Anthropic — Teaching Claude why
• Lachlan — The React2Shell Story (CVE-2025-55182)
• Specula team — Can LLMs model real-world systems in TLA+?
• OpenAI — Codex in Chrome on macOS and Windows
• DHH — Copilot review hit ratio 1/10 to 7/10
• r/LocalLLaMA — Qwen 35B-A3B on 12GB VRAM
• r/LocalLLaMA — AI2 EMO MoE with document-level routing
• METR — Claude Mythos Preview time-horizon evaluation