Claude Code v2.1.158: Auto Mode Is Now Available on Bedrock, Vertex AI, and Microsoft Foundry

One environment variable. That’s the distance between enterprise developers running Claude Code on managed cloud infrastructure and getting the same autonomous “Auto mode” experience that direct API users have been enjoying. Claude Code v2.1.158, released May 30, 2026, closes that gap.

What Is Auto Mode?

Auto mode changes how Claude Code handles permissions during long coding sessions. In the standard interactive mode, Claude Code pauses to request user approval before taking potentially risky actions — file writes, command execution, API calls, etc. This is sensible for exploratory work, but it creates constant interruptions for repetitive or clearly-bounded tasks.

Auto mode lets Claude make its own permission decisions on routine, low-risk actions, reducing approval prompts during longer or repetitive workflows. For actions that are genuinely higher-risk, Claude will still prompt for confirmation. The net effect is a significantly smoother experience for automation-heavy tasks like large refactors, test suite runs, or multi-file code generation.

Auto mode has been available for direct Anthropic API users for some time. What v2.1.158 adds is support for the three major enterprise cloud deployment platforms.

Supported Platforms and Models

Auto mode in v2.1.158 is available on:

  • Amazon Bedrock — via your existing Bedrock configuration and IAM setup
  • Google Vertex AI — alongside the existing Vertex AI login and configuration options
  • Microsoft Foundry (Azure AI Foundry) — configured entirely via environment variables

Supported models: Claude Opus 4.7 and Claude Opus 4.8.

How to Enable Auto Mode

The opt-in flag (required — Auto mode is not enabled by default):

export CLAUDE_CODE_ENABLE_AUTO_MODE=1

This environment variable must be set before launching Claude Code. You can add it to your shell profile or set it inline per session.

Amazon Bedrock Setup

If you already have Claude Code configured with Amazon Bedrock (IAM credentials, region, model ARN), enabling Auto mode requires only the environment variable above. No additional Bedrock-specific flags are needed.

Refer to the official Claude Code Bedrock documentation for Bedrock connection configuration if you haven’t set that up yet.

Google Vertex AI Setup

Similarly, Auto mode on Vertex AI requires only CLAUDE_CODE_ENABLE_AUTO_MODE=1 on top of an already-configured Vertex AI setup. The existing login wizard and project configuration flow remains unchanged.

Refer to the official Claude Code Vertex AI documentation for setup details.

Microsoft Foundry (Azure AI Foundry) Setup

Microsoft Foundry uses environment variables for connection configuration — there is no interactive wizard. In addition to the Auto mode flag, you’ll need the appropriate Azure resource environment variables configured. Refer to the official Microsoft Foundry documentation for the exact required environment variables, as these are subject to change.

The Auto mode opt-in for Foundry:

export CLAUDE_CODE_ENABLE_AUTO_MODE=1
# Plus your Azure/Foundry connection env vars — see official docs for exact keys

Note: The official documentation should be your authoritative source for the specific Foundry connection variables. Do not rely on third-party sources for exact environment variable names, as these may be outdated.

Other Notable Changes in v2.1.158

Beyond Auto mode, this release includes:

  • OpenTelemetry enhancement — improved observability integration for teams using distributed tracing
  • Fixes for /branch and /model effort options on cloud ARNs — these commands now work correctly when targeting Bedrock or Vertex model ARNs
  • Structured-output error fixes on Vertex AI and Bedrock — resolved failures where structured output responses were malformed in certain configurations
  • Vertex AI count_tokens fix behind proxies — token counting now works correctly when routing through a proxy layer

Upgrade Path

Update Claude Code via npm:

npm install -g @anthropic-ai/claude-code@latest

Verify your version:

claude --version
# Expect: 2.1.158

Then set your environment variable and run as usual:

export CLAUDE_CODE_ENABLE_AUTO_MODE=1
claude

Sources

  1. Claude Code v2.1.158 Release — YouTube demonstration
  2. Claude Code v2.1.158 Technical Breakdown — dev.classmethod.jp
  3. Claude Code Vertex AI Docs — code.claude.com
  4. Claude Code Microsoft Foundry Docs — code.claude.com
  5. Claude Code Changelog — code.claude.com
  6. Claude Code Releases — GitHub

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