https://code.claude.com/docs/en/changelog#2-1-88

claude-code-2-1-88.html

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• Added CLAUDE_CODE_NO_FLICKER=1 environment variable to opt into flicker-free alt-screen rendering with virtualized scrollback
• Added PermissionDenied hook that fires after auto mode classifier denials — return {retry: true} to tell the model it can retry
• Added named subagents to @ mention typeahead suggestions
• Fixed prompt cache misses in long sessions caused by tool schema bytes changing mid-session
• Fixed nested CLAUDE.md files being re-injected dozens of times in long sessions that read many files
• Fixed Edit/Write tools doubling CRLF on Windows and stripping Markdown hard line breaks (two trailing spaces)
• Fixed StructuredOutput schema cache bug causing ~50% failure rate in workflows with multiple schemas
• Fixed memory leak where large JSON inputs were retained as LRU cache keys in long-running sessions
• Fixed a potential out-of-memory crash when the Edit tool was used on very large files (>1 GiB)
• Fixed a crash when removing a message from very large session files (over 50MB)
• Fixed --resume crash when transcript contains a tool result from an older CLI version or interrupted write
• Fixed misleading “Rate limit reached” message when the API returned an entitlement error — now shows the actual error with actionable hints
• Fixed LSP server zombie state after crash — server now restarts on next request instead of failing until session restart
• Fixed hooks if condition filtering not matching compound commands (ls && git push) or commands with env-var prefixes (FOO=bar git push)
• Fixed prompt history entries containing CJK or emoji being silently dropped when they fall on a 4KB boundary in ~/.claude/history.jsonl
• Fixed /stats losing historical data beyond 30 days when the stats cache format changes
• Fixed /stats undercounting tokens by excluding subagent/fork usage
• Fixed scrollback disappearing when scrolling up in long sessions
• Fixed collapsed search/read group badges duplicating in terminal scrollback during heavy parallel tool use
• Fixed notification invalidates not clearing the currently-displayed notification immediately
• Fixed prompt briefly disappearing after submit when background messages arrived during processing
• Fixed long /btw responses being clipped with no way to scroll — responses now render in a scrollable viewport
• Fixed Devanagari and other combining-mark text being truncated in assistant output
• Fixed rendering artifacts on main-screen terminals after layout shifts
• Fixed voice mode failing to request microphone permission on macOS Apple Silicon
• Fixed voice push-to-talk not activating for some modifier-combo bindings
• Fixed voice mode on Windows failing with “WebSocket upgrade rejected with HTTP 101”
• Fixed Shift+Enter submitting instead of inserting a newline on Windows Terminal Preview 1.25
• Fixed periodic UI jitter during streaming in iTerm2 when running inside tmux
• Fixed PowerShell tool incorrectly reporting failures when commands like git push wrote progress to stderr on Windows PowerShell 5.1
• Fixed SDK error result messages (error_during_execution, error_max_turns) to correctly set is_error: true with descriptive messages
• Fixed task notifications being lost when backgrounding a session with Ctrl+B
• Fixed PreToolUse/PostToolUse hooks not providing file_path as an absolute path for Write/Edit/Read tools
• Improved PowerShell tool prompt with version-appropriate syntax guidance (5.1 vs 7+)
• Thinking summaries are no longer generated by default in interactive sessions — set showThinkingSummaries: true in settings to restore
• Auto mode denied commands now show a notification and appear in /permissions → Recent tab
• /env now applies to PowerShell tool commands (previously only affected Bash)
• /usage now hides redundant “Current week (Sonnet only)” bar for Pro and Enterprise plans
• Collapsed tool summary now shows “Listed N directories” for ls/tree/du instead of “Read N files”
• Image paste no longer inserts a trailing space
• Pasting !command into an empty prompt now enters bash mode, matching typed ! behavior