Claude Code now reads AGENTS.md if no CLAUDE.md is present

Claude Code now reads AGENTS.md if there is no Claude.md

Claude Code 2.1.277 adds AGENTS.md support: if a project has no CLAUDE.md, it reads AGENTS.md instead. You can change it under /config. Not yet on Bedrock, Vertex, or Foundry. Also fixes claude -p and Agent SDK sessions hanging after internal errors, update checks erroring every 30 minutes due to invalid proxy versions, and a Windows out-of-memory crash after replies. The post doesn't disclose performance numbers or new model support.