SchemaValidator Mutates Input Data on Validation Failure

[akramcodez]

Description

When schema validation fails, fixBooleanCasing(data) mutates the input object in-place.
This causes unexpected side effects for callers, as their original data object is modified even though validation failed.

Location

• File: packages/core/src/utils/schemaValidator.ts

Current Code

if (!valid && validate.errors) {
  fixBooleanCasing(data as Record<string, unknown>);  // ❌ Mutates input!
  // ...
}

Impact

• Caller's original object is unexpectedly altered
• Breaks immutability expectations
• Can introduce subtle bugs in retry or fallback logic