Claude Code 2.1.122: Bedrock Tiers, PR Resume, MCP Fixes

TL;DR

• Bedrock service tier selection via environment variable for cost/performance tuning
• Resume sessions by pasting PR URLs directly into search
• MCP server duplicate detection and clearer auth messaging
• Fixed fork generation bugs, image resizing, and terminal idle status flooding

New

• Bedrock service tier control — Set ANTHROPIC_BEDROCK_SERVICE_TIER to default, flex, or priority for cost/latency tradeoffs on AWS deployments
• PR URL session resume — Paste a GitHub, GitHub Enterprise, GitLab, or Bitbucket PR link into /resume search to instantly find the session that created it
• MCP duplicate detection — /mcp now surfaces claude.ai connectors hidden by manually-added servers sharing the same URL, with hints to clean up duplicates
• OpenTelemetry improvements — Numeric attributes on api_request/api_error events now emit as numbers instead of strings; added claude_code.at_mention log event for mention resolution

Fixed

• Fork generation crash — /branch no longer produces forks that fail with "tool_use ids without tool_result blocks" when source sessions contain rewound timeline entries
• Bedrock Effort option — /model now shows Effort selection for Bedrock application inference profile ARNs and correctly passes output_config.effort
• Structured output errors — Vertex AI and Bedrock no longer return "Extra inputs not permitted" on session-title generation and other structured queries
• Vertex AI proxy gateway — count_tokens endpoint no longer returns 400 errors for users behind proxy gateways
• Spinner tips suppression — spinnerTipsOverride.excludeDefault now correctly suppresses time-based spinner tips
• MCP tool discovery — ToolSearch no longer misses MCP tools that connect after session start in nonblocking mode
• Bash mode exit commands — !exit and !quit now run as shell commands instead of terminating the CLI
• Image resizing — Images sent to newer models now correctly resize to 2000px maximum per side instead of 2576px
• Terminal idle status — Remote control sessions no longer redraw idle status twice per second, preventing tmux -CC control pipe flooding and terminal pauses
• Blank assistant messages — Fixed stale view preference causing assistant messages to appear blank in some sessions
• Settings file validation — Malformed hooks entries in settings.json no longer invalidate the entire file
• Voice mode Caps Lock — Keybindings bound to Caps Lock now show an error since terminals don't deliver Caps Lock as a key event

Update Claude Code: npm install -g @anthropic-ai/claude-code@latest or check your IDE extension marketplace for the latest version.

Source: Claude Code