2.1.89 — Claude code - Product release notes & changelog tool

Added "defer" permission decision to PreToolUse hooks — headless sessions can pause at a tool call and resume with -p --resume to have the hook re-evaluate
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
Added MCP_CONNECTION_NONBLOCKING=true for -p mode to skip the MCP connection wait entirely, and bounded --mcp-config server connections at 5s instead of blocking on the slowest server
Auto mode: denied commands now show a notification and appear in /permissions → Recent tab where you can retry with r
Fixed Edit(//path/**) and Read(//path/**) allow rules to check the resolved symlink target, not just the requested path
Fixed voice push-to-talk not activating for some modifier-combo bindings, and voice mode on Windows failing with “WebSocket upgrade rejected with HTTP 101”
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 when using multiple schemas
Fixed memory leak where large JSON inputs were retained as LRU cache keys in long-running sessions
Fixed a crash when removing a message from very large session files (over 50MB)
Fixed LSP server zombie state after crash — server now restarts on next request instead of failing until session restart
Fixed prompt history entries containing CJK or emoji being silently dropped when they fall on a 4KB boundary in ~/.claude/history.jsonl
Fixed /stats undercounting tokens by excluding subagent usage, and losing historical data beyond 30 days when the stats cache format changes
Fixed -p --resume hangs when the deferred tool input exceeds 64KB or no deferred marker exists, and -p --continue not resuming deferred tools
Fixed claude-cli:// deep links not opening on macOS
Fixed MCP tool errors truncating to only the first content block when the server returns multi-element error content
Fixed skill reminders and other system context being dropped when sending messages with images via the SDK
Fixed PreToolUse/PostToolUse hooks to receive file_path as an absolute path for Write/Edit/Read tools, matching the documented behavior
Fixed autocompact thrash loop — now detects when context refills to the limit immediately after compacting three times in a row and stops with an actionable error instead of burning API calls
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 --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 hooks if condition filtering not matching compound commands (ls && git push) or commands with env-var prefixes (FOO=bar git push)
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 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 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 a potential out-of-memory crash when the Edit tool was used on very large files (>1 GiB)
Improved collapsed tool summary to show “Listed N directories” for ls/tree/du instead of “Read N files”
Improved Bash tool to warn when a formatter/linter command modifies files you have previously read, preventing stale-edit errors
Improved @-mention typeahead to rank source files above MCP resources with similar names
Improved PowerShell tool prompt with version-appropriate syntax guidance (5.1 vs 7+)
Changed Edit to work on files viewed via Bash with sed -n or cat, without requiring a separate Read call first
Changed hook output over 50K characters to be saved to disk with a file path + preview instead of being injected directly into context
Changed cleanupPeriodDays: 0 in settings.json to be rejected with a validation error — it previously silently disabled transcript persistence
Changed thinking summaries to no longer be generated by default in interactive sessions — set showThinkingSummaries: true in settings.json to restore
Documented TaskCreated hook event and its blocking behavior
Preserved task notifications when backgrounding a running command with Ctrl+B
PowerShell tool on Windows: external-command arguments containing both a double-quote and whitespace now prompt instead of auto-allowing (PS 5.1 argument-splitting hardening)
/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
Image paste no longer inserts a trailing space
Pasting !command into an empty prompt now enters bash mode, matching typed ! behavior
/buddy is here for April 1st — hatch a small creature that watches you code