Claude Code v2.1.77

Claude Code v2.1.77 was released on March 16, 2026.

Summary

- Increased default maximum output token limits for Claude Opus 4.6 to 64k tokens, and the upper bound for Opus 4.6 and Sonnet 4.6 models to 128k tokens - Added allowRead sandbox filesystem setting...

Release Notes

• Increased default maximum output token limits for Claude Opus 4.6 to 64k tokens, and the upper bound for Opus 4.6 and Sonnet 4.6 models to 128k tokens
• Added allowRead sandbox filesystem setting to re-allow read access within denyRead regions
• /copy now accepts an optional index: /copy N copies the Nth-latest assistant response
• Fixed "Always Allow" on compound bash commands (e.g. cd src && npm test) saving a single rule for the full string instead of per-subcommand, leading to dead rules and repeated permission prompts
• Fixed auto-updater starting overlapping binary downloads when the slash-command overlay repeatedly opened and closed, accumulating tens of gigabytes of memory
• Fixed --resume silently truncating recent conversation history due to a race between memory-extraction writes and the main transcript
• Fixed PreToolUse hooks returning "allow" bypassing deny permission rules, including enterprise managed settings
• Fixed Write tool silently converting line endings when overwriting CRLF files or creating files in CRLF directories
• Fixed memory growth in long-running sessions from progress messages surviving compaction
• Fixed cost and token usage not being tracked when the API falls back to non-streaming mode
• Fixed CLAUDECODEDISABLEEXPERIMENTALBETAS not stripping beta tool-schema fields, causing proxy gateways to reject requests
• Fixed Bash tool reporting errors for successful commands when the system temp directory path contains spaces
• Fixed paste being lost when typing immediately after pasting
• Fixed Ctrl+D in /feedback text input deleting forward instead of the second press exiting the session
• Fixed API error when dragging a 0-byte image file into the prompt
• Fixed Claude Desktop sessions incorrectly using the terminal CLI's configured API key instead of OAuth
• Fixed git-subdir plugins at different subdirectories of the same monorepo commit colliding in the plugin cache
• Fixed ordered list numbers not rendering in terminal UI
• Fixed a race condition where stale-worktree cleanup could delete an agent worktree just resumed from a previous crash
• Fixed input deadlock when opening /mcp or similar dialogs while the agent is running
• Fixed Backspace and Delete keys not working in vim NORMAL mode
• Fixed status line not updating when vim mode is toggled on or off
• Fixed hyperlinks opening twice on Cmd+click in VS Code, Cursor, and other xterm.js-based terminals
• Fixed background colors rendering as terminal-default inside tmux with default configuration
• Fixed iTerm2 session crash when selecting text inside tmux over SSH
• Fixed clipboard copy silently failing in tmux sessions; copy toast now indicates whether to paste with ⌘V or tmux prefix+]
• Fixed ←/→ accidentally switching tabs in settings, permissions, and sandbox dialogs while navigating lists
• Fixed IDE integration not auto-connecting when Claude Code is launched inside tmux or screen
• Fixed CJK characters visually bleeding into adjacent UI elements when clipped at the right edge
• Fixed teammate panes not closing when the leader exits
• Fixed iTerm2 auto mode not detecting iTerm2 for native split-pane teammates
• Faster startup on macOS (~60ms) by reading keychain credentials in parallel with module loading
• Faster --resume on fork-heavy and very large sessions — up to 45% faster loading and ~100-150MB less peak memory
• Improved Esc to abort in-flight non-streaming API requests
• Improved claude plugin validate to check skill, agent, and command frontmatter plus hooks/hooks.json, catching YAML parse errors and schema violations
• Background bash tasks are now killed if output exceeds 5GB, preventing runaway processes from filling disk
• Sessions are now auto-named from plan content when you accept a plan
• Improved headless mode plugin installation to compose correctly with CLAUDECODEPLUGINSEEDDIR
• Show a notice when apiKeyHelper takes longer than 10s, preventing it from blocking the main loop
• The Agent tool no longer accepts a resume parameter — use SendMessage({to: agentId}) to continue a previously spawned agent
• SendMessage now auto-resumes stopped agents in the background instead of returning an error
• Renamed /fork to /branch (/fork still works as an alias)
• [VSCode] Improved plan preview tab titles to use the plan's heading instead of "Claude's Plan"
• [VSCode] When option+click doesn't trigger native selection on macOS, the footer now points to the macOptionClickForcesSelection setting

View original release

Other Recent Claude Code Releases

• v2.1.216 (July 20, 2026)
• v2.1.215 (July 19, 2026)
• v2.1.214 (July 18, 2026)
• v2.1.212 (July 16, 2026)
• v2.1.211 (July 15, 2026)

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