Function extractThinkingText

extractThinkingText(program: Program, span?: ThinkingSpan): string
Reads model reasoning text.
Parameters
- program: Program
  Program to read.
- Optionalspan: ThinkingSpan
  Thinking span to read. Omit to join every thinking block in the program, separated by blank lines.
Returns string
The reasoning text, empty when the program carries none.
Example
```
const reasoning = extractThinkingText(response);
```