← Claude Code changelog

Claude Code 2.1.122

This release brings new capabilities for Bedrock users with the addition of a service tier selection environment variable. Developers will benefit from improved session management, including the ability to find sessions by pasting pull request URLs and better visibility for MCP connectors. Key fixes address critical issues such as /branch failures, structured output errors for Vertex AI and Bedrock, missing Effort options in /model, and assistant messages appearing blank in sessions.

Added

  • Added `ANTHROPIC_BEDROCK_SERVICE_TIER` environment variable to select a Bedrock service tier (`default`, `flex`, or `priority`), sent as the `X-Amzn-Bedrock-Service-Tier` header

Changed

  • Pasting a PR URL into the `/resume` search box now finds the session that created that PR (GitHub, GitHub Enterprise, GitLab, and Bitbucket)
  • `/mcp` now shows claude.ai connectors hidden by a manually-added server with the same URL, with a hint to remove the duplicate
  • Clarified the `/mcp` message shown when an MCP server is still unauthorized after the browser sign-in flow
  • OpenTelemetry: numeric attributes on `api_request`/`api_error` log events are now emitted as numbers, not strings
  • OpenTelemetry: added `claude_code.at_mention` log event for `@`-mention resolution
  • Voice mode: keybindings bound to Caps Lock now show an error since terminals don't deliver Caps Lock as a key event

Fixed

  • Fixed `/branch` producing forks that fail with "tool_use ids were found without tool_result blocks" when the source session contained entries from rewound timelines
  • Fixed `/model` not showing the Effort option for Bedrock application inference profile ARNs, and those ARNs not receiving `output_config.effort`
  • Fixed Vertex AI / Bedrock returning `invalid_request_error: output_config: Extra inputs are not permitted` on session-title generation and other structured-output queries
  • Fixed Vertex AI `count_tokens` endpoint returning 400 errors for users behind proxy gateways
  • Fixed `spinnerTipsOverride.excludeDefault` not suppressing the time-based spinner tips
  • Fixed ToolSearch missing MCP tools that connected after session start in nonblocking mode
  • Fixed `!exit` / `!quit` in bash mode terminating the CLI instead of running as a shell command
  • Fixed images sent to newer models being resized to 2576px per side instead of the correct 2000px maximum
  • Fixed remote control session idle status redrawing twice per second, which could flood `tmux -CC` control pipes and pause the terminal
  • Fixed assistant messages appearing blank in some sessions due to a stale view preference
  • Fixed a malformed hooks entry in `settings.json` no longer invalidating the entire file