Missing support for thinking content blocks

[yokomotod]

Problem

When Claude Code responses contain thinking content blocks, the SDK fails to parse them and returns an AssistantMessage with empty content ({ "content": [] }).

Expected Behavior

The SDK should properly parse thinking content blocks and expose them through a ThinkingBlock type, allowing users to access both the thinking
content and signature fields.

Current Behavior

Claude Code responses with thinking blocks result in AssistantMessage with content: []

[alm0ra]

@ltawfik any update?