Claude Code release notes — page 9

Claude Code 2.1.86

Added X-Claude-Code-Session-Id header to API requests so proxies can aggregate requests by session without parsing the body · Added .jj and .sl to VCS…

Claude Code 2.1.85

Added CLAUDE_CODE_MCP_SERVER_NAME and CLAUDE_CODE_MCP_SERVER_URL environment variables to MCP headersHelper scripts, allowing one helper to serve multiple servers · Added conditional if field for hooks…

Claude Code 2.1.84

Added PowerShell tool for Windows as an opt-in preview. Learn more at · Added ANTHROPIC_DEFAULT_{OPUS,SONNET,HAIKU}_MODEL_SUPPORTS env vars to override effort/thinking capability detection for pinned…

Claude Code 2.1.83

Added managed-settings.d/ drop-in directory alongside managed-settings.json, letting separate teams deploy independent policy fragments that merge alphabetically · Added CwdChanged and FileChanged hook events for…

Claude Code 2.1.81

Added --bare flag for scripted -p calls — skips hooks, LSP, plugin sync, and skill directory walks; requires ANTHROPIC_API_KEY or an apiKeyHelper via --settings…

Claude Code 2.1.80

Added rate_limits field to statusline scripts for displaying Claude.ai rate limit usage (5-hour and 7-day windows with used_percentage and resets_at) · Added source: 'settings'…

Claude Code 2.1.79

Added --console flag to claude auth login for Anthropic Console (API billing) authentication · Added "Show turn duration" toggle to the /config menu ·…

Claude Code 2.1.78

Added StopFailure hook event that fires when the turn ends due to an API error (rate limit, auth failure, etc.) · Added ${CLAUDE_PLUGIN_DATA} variable…

Claude Code 2.1.77

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…

Claude Code 2.1.76

Added MCP elicitation support — MCP servers can now request structured input mid-task via an interactive dialog (form fields or browser URL) · Added…

Claude Code 2.1.75

Claude Code 2.1.74

Added actionable suggestions to /context command — identifies context-heavy tools, memory bloat, and capacity warnings with specific optimization tips · Added autoMemoryDirectory setting to…

Claude Code 2.1.73

Added modelOverrides setting to map model picker entries to custom provider model IDs (e.g. Bedrock inference profile ARNs) · Added actionable guidance when OAuth…

Claude Code 2.1.72

Changed tool search to bypass the third-party proxy gate when the environment variable is set (replaces CLAUDE_CODE_PROXY_SUPPORTS_TOOL_REFERENCE, now removed) · Added w key in…

Claude Code 2.1.71

Added /loop command to run a prompt or slash command on a recurring interval (e.g. /loop 5m check the deploy) · Added cron scheduling…

Claude Code 2.1.70

Fixed API 400 errors when using ANTHROPIC_BASE_URL with a third-party gateway — tool search now correctly detects proxy endpoints and disables tool_reference blocks ·…

Claude Code 2.1.69

Added the /claude-api skill for building applications with the Claude API and Anthropic SDK · Added Ctrl+U on an empty bash prompt (!) to…

Claude Code 2.1.68

Opus 4.6 now defaults to medium effort for Max and Team subscribers. Medium effort works well for most tasks — it's the sweet spot…

Claude Code 2.1.66

Claude Code 2.1.63

Added /simplify and /batch bundled slash commands · Fixed local slash command output like /cost appearing as user-sent messages instead of system messages in…