[BUG] Latest Claude Code version not available in claude-agent-sdk

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

v2.0.64 of the Claude Code CLI was released last night. However, the latest version of the claude-agent-sdk is still v0.1.62 the next day.

See: https://www.npmjs.com/package/@anthropic-ai/claude-agent-sdk?activeTab=readme

What Should Happen?

The released SDK version should be kept in sync with the Claude Code executable version. This means that certain features in the latest version of the executable are not available to SDK users, including the .env fix in #401

Error Messages/Logs

Steps to Reproduce

N/A

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.0.62

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Non-interactive/CI environment

Additional Information

_No response_