Claude Code version 2.1.239, released on August 21, 2026, resolved a critical billing issue where API calls were silently double-billed due to a proxy stripping the Content-Type header, causing non-streaming re-runs of each turn. This defect, which went unnoticed by developers, impacted users of Amazon Bedrock. Despite the fix, the stable channel of the @anthropic-ai/claude-code npm package remained nine releases and ten days behind the latest version as of August 23, 2026, contrary to Anthropic's documentation stating the stable channel is typically about a week old. AI
IMPACT Fixes a critical billing error for developers using Claude Code with Amazon Bedrock, preventing unexpected costs.
RANK_REASON This is a bug fix release for a specific tool, not a new model or major product announcement.
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