Claude Code 2.1.273

UpdateSep 15, 2026VerifiedAdded Sep 22, 2026

What's changed Added x-claude-code-request-class , x-claude-code-agent-type , x-claude-code-prev-tool-durations , x-claude-code-compaction and x-claude-code-context-compacted request headers for LLM gateways; opt in with CLAUDE_CODE_GATEWAY_HINT_HEADERS=1 Added a notification when an MCP server disconnects mid-session and automatic reconnection gives up...

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Read Anthropic's release notes

https://github.com/anthropics/claude-code/releases/tag/v2.1.273

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