我自己做了一个Pi核心20道题，理解了这20道题，对agent就有了一个大概的了解了。

Exponential Time Hypothesis (ETH), a 27-year-old conjecture in complexity theory, just fell. On Oct 16, OpenAI and Anthropic models independently solved 3-SAT with the same 2^(n/√log n) bound. Not P = NP, but faster than anyone thought possible. We live in extraordinary times.

This looks more fun than a robot duck... a $400 humanoid built around an old phone. UCLA’s RoMeLa team built PhoneBot from an Android phone and a modular body with 13 motorized joints. It can walk, turn and get up from a face-down position. The phone supplies the camera, motion sensors and processing power for vision and walking control. The team even ran the core software on a 2017 Honor 9. The team estimates the hardware cost at around $400, not including the phone. CAD files and the parts list are already online.

‼️ Tailscale SSH Flaws Could Let Hackers Gain Root Access Across Servers Details: cybersecuritynews.com/tailsc… A new security report warns that Tailscale SSH has flaws that could let a hacker move from one compromised device to root access on other servers. Tailscale SSH lets approved devices log in to each other over a private network. The report lists 11 findings in five groups. They cover Tailscale’s SSH server, its serve and app connector features, the DERP relay client, and headscale, an open-source server that manages Tailscale networks. The researcher tested Tailscale 1.104.2 and headscale 0.29.5 between October 22 and October 24, 2026. The most serious group involves Tailscale SSH. Its SSH server runs inside tailscaled, a background program with full root privileges on the machine. #cybersecuritynews