Claude Code v2.1.88: Flicker-Free Alt-Screen Rendering, Named Subagent @ Mentions, Long-Session Memory Leak Fixes

Releasebot·medium signal

Today's release adds CLAUDE_CODE_NO_FLICKER=1 environment variable for flicker-free alt-screen rendering with virtualized scrollback. Named subagents now appear in @ mention typeahead suggestions, improving multi-agent coordination UX. Critical stability fixes include memory leaks in long-running sessions, prompt cache invalidation when tool schema bytes changed, LSP server zombie state recovery after crashes, and Windows CRLF doubling in Edit/Write tools.