Claude Code 2.1.316 released

A release with new configuration options, fixes for shell commands and model switching, and improvements to auto mode and cloud sessions.

What changed in 2.1.316

• Added environment variables to control ultrathink, cross-certificate loops, and subagent effort levels; added layered policy mode and input tagging for Bedrock guardrails.
• Fixed shell commands left running on macOS and Linux, bash aliases with line breaks, and PowerShell hooks not blocking correctly.
• Fixed model switching on Vertex AI and Bedrock, restricted sessions uploading files outside working directories, and prompts needing two Enters to send.
• Fixed cloud sessions not marked as failed when auto mode stopped without safety verdict, and MCP server receiving corrupted environment variables.
• Improved code review findings display in cloud sessions, SSL certificate error messages, and various UI issues in VSCode and Slack.

Check before you update

• Fast mode for Opus 4.8 deprecated as of October 30, 2026 and will be removed November 30, 2026; migrate to Opus 5.5 to keep fast mode.
• autoMode.allow lists without "$defaults" no longer get built-in exceptions; add "$defaults" to restore them.

Summarised by AgentGid from Anthropic's official release notes on GitHub, as reported there; read the original before relying on it. Price, status and release dates come from our daily data.