Claude Code v2.1.293 ships Claude Haiku 5.5, fixes session and tool-call bugs

Claude Code v2.1.293 发布：新增 Claude Haiku 5.5 并修复大量问题

Claude Code v2.1.293 adds Claude Haiku 5.5 (claude-haiku-5-5) and fixes context compaction, background sessions, MCP connections and permission handling.

Why it matters: The fixes target repeated execution after context compaction, dropped background messages and permission handling, cutting state confusion in long sessions and multi-agent tasks.