2.1.77

Increased default output token limits for Claude Opus 4.6 to 64k tokens and upper bound to 128k tokens. Added allowRead sandbox filesystem setting and optional index parameter to /copy command. Fixed permission rules saving incorrectly, auto-updater memory accumulation, conversation history truncation with --resume, PreToolUse hooks bypassing permission rules, line ending conversions, memory growth in long sessions, cost tracking in fallback mode, beta tool-schema stripping, Bash errors with spaces in temp paths, paste handling, and numerous UI/terminal issues. Fixed IDE integration in tmux/screen, CJK character rendering, teammate panes not closing, and iTerm2 auto mode detection. Improved startup and --resume performance (45% faster, 100-150MB less memory), Esc abort functionality, and plugin validation. Renamed /fork to /branch. VSCode: Improved plan preview titles and added macOptionClickForcesSelection setting reference.