[Release] anthropics/claude-code v2.1.239: v2.1.239

Claude Code v2.1.239 is a major release featuring improved cost estimation with US-only inference premiums, enhanced cloud session plugin management, Python 3.1.x migration tools, and extensive bug fixes across Bedrock, Alpine/musl builds, proxy handling, IDE integration, and UI rendering. The update addresses 50+ issues including streaming fixes, race conditions, MCP server reliability, and keyboard/mouse input handling in fullscreen mode.

Key Points

• •Cost estimates now include 1.1× US-only-inference premium for data-residency workspaces
• •Added `/claude-api upgrade` command to migrate Python projects from anthropic 0.x to 1.x with updated reference docs
• •Cloud session plugins synced from claude.ai now display as `name@synced` and never override locally installed plugins with same names
• •Fixed critical Bedrock streaming bug behind proxies that stripped Content-Type headers, causing silent double-billing by re-running turns non-streaming
• •Alpine/musl builds now support native image paste, clipboard, and audio-capture add-ons using musl-built binaries
• •Fixed HTTPS proxy credential pre-check for Bedrock with SSO profiles to prevent startup hangs
• •Enhanced MCP elicitation forms in fullscreen mode with scrollable fields and persistent Accept/Decline buttons
• •Fixed remote MCP servers staying failed after transient 5xx errors during mid-session reconnects
• •Improved `/goal` check-in backoff strategy (30 min → 1 h → 2 h) for long-running background work
• •Fixed multiple UI/UX issues: vim mode Escape behavior, slash-command panel overlays, fullscreen permission prompts, and mouse text insertion in browser terminals

Workflow Diagram

Concepts