LaunchDevelopersSeptember 15, 2026

Claude Code 2.1.273 adds LLM gateway request headers

Claude Code 2.1.273 adds x-claude-code-request-class, agent-type, prev-tool-durations, compaction and context-compacted request headers for LLM gateways, opt-in via CLAUDE_CODE_GATEWAY_HINT_HEADERS=1. Also adds MCP server disconnect notifications and session forking for remote-control sessions.

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