Anthropic ships Claude Code v2.1.239 with cost estimates factoring US-only residency premium and Python SDK migrator

On August 21, Anthropic shipped Claude Code v2.1.239, the heaviest single release of the month. The headline changes: cost estimates in /cost, the status line and --max-budget-usd now factor in the 1.1x inference premium that applies to US-only data-residency workspaces, so regulated teams stop under-reporting spend in budget forecasts.

A new /claude-api upgrade command automatically migrates Python projects off the legacy anthropic 0.x SDK onto 1.x, reducing the risk of compatibility problems in long-unupgraded projects under changing API behavior. Cloud sessions now sync plugins from claude.ai under a name@synced label instead of silently overriding a locally installed plugin with the same name. Windows finally gets cross-session messaging, matching what Mac and Linux users already had through ListAgents and SendMessage.

On the fix side, v2.1.239 addresses a long list of edge cases: Bedrock streaming behind proxies that strip response headers, JetBrains terminal Edit/Write pauses, /resume losing custom titles past 64KB of conversation, MCP elicitation forms clipping in fullscreen mode. For teams running Claude Code on Bedrock, Vertex or a data-residency workspace, both the cost-estimate fix and the SDK migrator are worth checking before the next billing cycle.

v2.1.240 and v2.1.241 followed on August 22 and August 23, both with the same one-line changelog "bug fixes and reliability improvements" without publicly specified detail. In parallel, Anthropic announced extending the 50% increase to weekly Claude Code usage limits for Pro, Max, Team and seat-based Enterprise plans through August 31, with the company aiming to make the change permanent while warning that strong model demand could cause capacity constraints in the coming weeks.