/ Claude Code v2.1.85

Fixed the ConstrainedLanguage allowlist check to cover both New-Object .NET type instantiation and direct command invocations in PowerShell (search for "ConstrainedLanguage allowlist")
Improved ensureToolResultPairing to refuse synthetic placeholder injection when repair would corrupt model context: "See inc-4977" (search for "See inc-4977")
Enhanced step-up authentication tracking with "Marked step-up pending" logging for better debugging of auth state transitions (search for "Marked step-up pending")
Removed the tengu_grey_wool feature flag and associated legacy model remapping logic controlled by CLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP

The build it came inv2.1.85

26 Mar 2026 · 20 entries, this one is #18.

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flagtengu_grey_wool
envCLAUDE_CODE_DISABLE_LEGACY_MODEL_REMAP
Set to 1 to prevent automatic remapping of Opus 4.0 and 4.1 to the current Opus version on the Anthropic API. Use when you intentionally want to pin an older model. The remap does not run on Amazon Bedrock, Google Cloud's Agent Platform, or Microsoft Foundry

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