claude_code_releases ยท Apr 28, 2026 ยท release
v2.1.122
What's changed 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 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 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 /