Constant MAX_JSON_DEPTH 

pub const MAX_JSON_DEPTH: usize = 32;

Maximum allowed JSON nesting depth

This limit prevents DoS attacks via deeply nested JSON that can cause:

• Stack overflow
• Excessive memory consumption
• CPU exhaustion during parsing

A depth of 32 is sufficient for legitimate API responses while protecting against malicious payloads. Most real-world APIs use <10 levels of nesting.