← Claude Code changelog

Claude Code 2.1.85

Conditional hooks for reduced process spawning overhead and headless integrations for custom UI collection of user question answers are now available. Deep link queries have been expanded to support up to 5,000 characters, alongside new MCP environment variables for multi-server setups and timestamp markers in transcripts for scheduled tasks. Significant stability and performance fixes address issues like '/compact' failures with large conversations, remote session memory leaks, persistent connection errors, and prompts getting stuck in the queue. Improvements also include better terminal keyboard mode handling and multi-monitor display switching functionality.

Added

  • 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 using permission rule syntax (e.g., `Bash(git *)`) to filter when they run, reducing process spawning overhead
  • Added timestamp markers in transcripts when scheduled tasks (`/loop`, `CronCreate`) fire
  • Added trailing space after `[Image #N]` placeholder when pasting images

Improved

  • Improved @-mention file autocomplete performance on large repositories
  • Improved PowerShell dangerous command detection
  • Improved scroll performance with large transcripts by replacing WASM yoga-layout with a pure TypeScript implementation

Changed

  • Deep link queries (`claude-cli://open?q=…`) now support up to 5,000 characters, with a "scroll to review" warning for long pre-filled prompts
  • MCP OAuth now follows RFC 9728 Protected Resource Metadata discovery to find the authorization server
  • Plugins blocked by organization policy (`managed-settings.json`) can no longer be installed or enabled, and are hidden from marketplace views
  • PreToolUse hooks can now satisfy `AskUserQuestion` by returning `updatedInput` alongside `permissionDecision: "allow"`, enabling headless integrations that collect answers via their own UI
  • `tool_parameters` in OpenTelemetry tool_result events are now gated behind `OTEL_LOG_TOOL_DETAILS=1`
  • Reduced UI stutter when compaction triggers on large sessions

Fixed

  • Fixed `/compact` failing with "context exceeded" when the conversation has grown too large for the compact request itself to fit
  • Fixed `/plugin enable` and `/plugin disable` failing when a plugin's install location differs from where it's declared in settings
  • Fixed `--worktree` exiting with an error in non-git repositories before the `WorktreeCreate` hook could run
  • Fixed `deniedMcpServers` setting not blocking claude.ai MCP servers
  • Fixed `switch_display` in the computer-use tool returning "not available in this session" on multi-monitor setups
  • Fixed crash when `OTEL_LOGS_EXPORTER`, `OTEL_METRICS_EXPORTER`, or `OTEL_TRACES_EXPORTER` is set to `none`
  • Fixed diff syntax highlighting not working in non-native builds
  • Fixed MCP step-up authorization failing when a refresh token exists — servers requesting elevated scopes via `403 insufficient_scope` now correctly trigger the re-authorization flow
  • Fixed memory leak in remote sessions when a streaming response is interrupted
  • Fixed persistent ECONNRESET errors during edge connection churn by using a fresh TCP connection on retry
  • Fixed prompts getting stuck in the queue after running certain slash commands, with up-arrow unable to retrieve them
  • Fixed Python Agent SDK: `type:'sdk'` MCP servers passed via `--mcp-config` are no longer dropped during startup
  • Fixed raw key sequences appearing in the prompt when running over SSH or in the VS Code integrated terminal
  • Fixed Remote Control session status staying stuck on "Requires Action" after a permission is resolved
  • Fixed shift+enter and meta+enter being intercepted by typeahead suggestions instead of inserting newlines
  • Fixed stale content bleeding through when scrolling up during streaming
  • Fixed terminal left in enhanced keyboard mode after exit in Ghostty, Kitty, WezTerm, and other terminals supporting the Kitty keyboard protocol — Ctrl+C and Ctrl+D now work correctly after quitting