Claude Code

Tampered Claude Code extension on Cursor marketplace exposed up to 5,000 users over 11 hours: A tampered Claude Code extension was available on Cursor's marketplace for about 11 hours, affecting up to 5,000 users. It attempted to steal user data and set up remote access, prompting Cursor to take the marketplace offline; it was reinstated after no further risk was confirmed.

Security • The Decoder

Coding-agent harness swaps barely change pass rates but can triple cost, study finds: A controlled study found that switching coding-agent harnesses such as Claude Code, OpenCode or mini-SWE-agent barely changed pass rates versus rerunning the same setup, while cost per task could triple. The higher cost was driven mainly by system prompts resent at every step.

AI Research • The Decoder