All three coding agents write everything they do to disk, in undocumented formats. The author of Agent Standup, an open-source tool that reads those files to show which agent is working or waiting, explains where they live, which records matter and how sub-agents show up. Useful for anyone monitoring several sessions at once.
A developer hid 40 bugs in a test online store and had Claude Code explore it with Playwright using three prompt styles. With a full checklist it found about 30 bugs on average for under a dollar per run; five bugs were missed by every run. The takeaway: a useful first pass before release, not a replacement for human testers.
Vercel recaps its annual event, focused on infrastructure for agents: AI SDK 7 for building multi-turn, tool-using agents, MCP Events in beta to react to MCP server events, and new budget and privacy controls in AI Gateway. On the traditional side, Python becomes generally available and Daemons arrive for background workloads.
Anthropic says its daily merges went from about 2,500 to over 30,000 in a few months because Claude writes much of the code, turning git into the bottleneck. In five months it built Scion, a version control system designed for always-online agents. It is an early look at which workflows stop scaling once agents write the code.
