[BUG] Bedrock documentation does not list the ability to 'DISABLE_PROMPT_CACHING'

Environment

• Platform (select one):
• [ ] Anthropic API
• [x] AWS Bedrock
• [ ] Google Vertex AI
• [] Other: <!-- specify -->
• Claude CLI version: v1.0.35
• Operating System: Ubuntu
• Terminal: Claude Code

Bug Description

The Claude Code Environment Variables documentation does not list the ability to 'DISABLE_PROMPT_CACHING'.

Steps to Reproduce

1. Configure the claude app to use aws bedrock

   ...
    "CLAUDE_CODE_USE_BEDROCK":"1",
    "ANTHROPIC_MODEL": "anthropic.claude-3-5-sonnet-20240620-v1:0",

1. Provide credentials to an AWS Gov Cloud region (caching is unavailable in these regions)
2. Prompt claude to 'say hi'

Expected Behavior

The app says hi.

Actual Behavior

The claude code cli attempts to use caching and returns:

API Error: 400 You invoked an unsupported model or your request did not allow prompt caching. See the documentation for more information.

Additional Context

I'd searched issues and found that 1293 has DISABLE_PROMPT_CACHING in the command. When I searched the documentation the DISABLE_PROMPT_CACHING was only present in a Google Vertex AI integration page. Adding
"DISABLE_PROMPT_CACHING" : "1" to the settings.json resolved the problem.

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