Claude Code 2.1.276 fixes regression breaking all requests behind proxies

ClaudeCodeLog · x · 2026-09-18

Anthropic ships Claude Code CLI 2.1.276 with a single fix: when ANTHROPICBASEURL points at a proxy or gateway, a 2.1.275 regression caused every request to fail with a 400 error (Input tag "advisor20260301"). This release restores requests.

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