Claude Code v2.1.77 Release Notes

Claude Code v2.1.77 is now available with significant improvements to model capabilities, enhanced development tools, and comprehensive bug fixes. This release focuses on expanding output limits and resolving critical issues that have been affecting user workflows.

What’s New

Expanded Token Limits

The headline feature of this release is the substantial increase in output token limits:

• Claude Opus 4.6: Default maximum increased to 64,000 tokens
• Opus 4.6 and Sonnet 4.6: Upper bound raised to 128,000 tokens

These increases enable longer, more detailed code generation and analysis sessions without hitting token limits.

Enhanced Sandbox Controls

A new allowRead filesystem setting has been added, providing granular control over file access permissions. This setting enables read access within specific denyRead regions, offering more flexible security configurations for enterprise users.

Improved Copy Command

The /copy command now supports indexing with /copy N, allowing you to copy the Nth-latest assistant response. This enhancement streamlines workflow when working with multiple code suggestions or iterations.

Critical Bug Fixes

This release addresses numerous issues including:

• Fixed permission handling for compound bash commands
• Resolved auto-updater memory accumulation issues
• Corrected conversation history truncation with --resume
• Fixed security bypass in PreToolUse hooks
• Improved file handling for CRLF line endings
• Enhanced terminal integration and vim mode functionality
• Resolved IDE integration issues in tmux/screen environments

How to Update

Claude Code will automatically prompt you to update to v2.1.77 when available. You can also manually check for updates through the application settings or download directly from the GitHub release page.

For CLI users, update using your preferred package manager or download the latest binary from the official release.

Links

• Full Release Notes
• Claude Code Documentation
• Community Discord