Claude Code v2.1.239: Cost Estimates Include 1.1x Premium, /claude-api Upgrade, and Major Fixes

Claude Code v2.1.239 (latest) rolls out cost-estimate updates, a new migration command, and a long list of fixes for Bedrock, MCP, and terminal rendering. Here's what's practical for daily use.

Cost Estimates Now Include US-Only Premium

If you're in a data-residency workspace, the /cost command, status line, and --max-budget-usd now factor in the 1.1× premium for US-only inference. Budgeting gets more accurate—no more surprise overruns.

New /claude-api Upgrade Command

For Python projects stuck on the anthropic 0.x SDK, /claude-api upgrade migrates them to 1.x. The skill's reference now uses anthropic.Timeout instead of httpx.Timeout—check your timeout calls after upgrading.

Fullscreen Renderer Opens Up

The one-time fullscreen renderer offer is now available on Bedrock, Vertex, Foundry, and other previously excluded setups. New installs there start in fullscreen (if you accept the offer).

Cloud Sessions: Plugin Syncing

Plugins synced from claude.ai now show as name@synced and work with claude plugin enable/disable <name>@synced. They won't override a plugin you installed manually with the same name.

Key Fixes

• Bedrock streaming: Fixed double-billing when proxies strip Content-Type—now streams properly instead of re-running turns non-streaming.
• HTTPS proxy hang: Fixed startup hang with Bedrock SSO profiles and awsAuthRefresh; credential pre-check now honors HTTPS_PROXY.
• JetBrains IDE: Fixed 5-second pause on Edit/Write when the plugin is connected.
• WebFetch memory: Expired page content now clears after 15 minutes instead of persisting all session.
• Vim mode: Escape in agent view now exits to NORMAL without clearing the prompt.
• MCP forms: Tall elicitation forms now fit the fullscreen window, with scrolling and visible Accept/Decline.
• Remote MCP: Servers recover after transient 5xx on reconnect in cloud sessions or via setMcpServers().
• Themes: dark-ansi no longer renders expanded tool results with invisible text.
• Fullscreen prompt: Stops reappearing after being shown three times if it can't be answered.
• Path matching: /resume no longer picks up sessions from similarly-named dirs (e.g., underscores vs. dashes).
• UTF-8 BOM: Agents, skills, and commands with BOM in .md files are now recognized.
• OpenTelemetry: Deferred tool executions resume in the original trace, not a new one.
• Mouse reports: Fixed terminal inserting escape sequences like 35;150;7M when reports split across writes.

Who It's For

If you use Claude Code on Bedrock, in JetBrains, or rely on cost tracking for data-residency, this release directly addresses your pain points. The /claude-api upgrade is essential if you're still on the Python 0.x SDK.