Claude Code v2.1.77 Released - MCP Elicitation and New Slash Commands

Anthropic released Claude Code v2.1.77 on March 14, 2026. This version introduces MCP elicitation support, new slash commands, and numerous bug fixes.

Key New Features

MCP Elicitation Support

MCP servers can now request structured input mid-task via an interactive dialog (form fields or browser URL). New Elicitation and ElicitationResult hooks have been added to intercept and override responses before they are sent back.

New Slash Commands

• /effort: New slash command to set the model’s effort level.

CLI Enhancements

• -n / --name flag: Set a display name for the session at startup.
• worktree.sparsePaths setting: For large monorepos, check out only needed directories via git sparse-checkout.
• PostCompact hook: New hook that fires after context compaction completes.
• Enterprise feedback survey: Session quality survey added, with feedbackSurveyRate setting for admins to configure sample rate.

Bug Fixes

This release includes numerous bug fixes:

• Fixed deferred tools (loaded via ToolSearch) losing their input schemas after conversation compaction
• Fixed slash commands showing “Unknown skill”
• Fixed plan mode asking for re-approval after the plan was already accepted
• Fixed voice mode swallowing keypresses while a permission dialog or plan editor was open
• Fixed /voice not working on Windows when installed via npm
• Fixed spurious “Context limit reached” when invoking a skill with model: frontmatter on a 1M-context session
• Fixed “adaptive thinking is not supported on this model” error when using non-standard model strings
• Fixed Bash(cmd:*) permission rules not matching when a quoted argument contains #
• Fixed “don’t ask again” in the Bash permission dialog showing the full raw command for pipes and compound commands
• Fixed auto-compaction retrying indefinitely - circuit breaker now stops after 3 attempts
• Fixed MCP reconnect spinner persisting after successful reconnection
• Fixed LSP plugins not registering servers when the LSP Manager initialized before marketplaces
• Fixed clipboard copying in tmux over SSH
• Fixed /export showing only the filename instead of full file path
• Fixed transcript not auto-scrolling to new messages after selecting text
• Fixed Escape key not working to exit the login method selection screen
• Fixed several Remote Control issues
• Improved —worktree startup performance
• Improved background agent behavior - killing preserves partial results
• Improved model fallback notifications
• Improved blockquote readability on dark terminal themes