Claude Code v2.1.274 adds critical-memory warnings, MCP startup timeout and transcript self-healing
Anthropic
Following the Sep 14-15 train (v2.1.271-273: fast mode in remote sessions, per-command sandbox domain allowlisting, gateway hint headers), v2.1.274 landed Sep 17 with a critical-memory warning, a CLAUDE_CODE_MCP_STARTUP_WAIT_MS bound on MCP server startup, self-healing for corrupted transcripts stuck on tool_use_id 400 errors, a SIGTERM gateway drain timeout, and tighter permission prompting for shell loops over special variables.
Why it matters
The gateway-facing features (drain timeout, hint headers, MCP startup wait) signal Claude Code is being run as long-lived fleet infrastructure, and the release closes real permission-prompt bypass paths.
Importance: 2/5
Minor version, but security- and fleet-operations-relevant fixes
Sources
official
Releases - anthropics/claude-code