Function check_pure_rust_testing 

pub fn check_pure_rust_testing(project_path: &Path) -> CheckItem

AI-03: Pure Rust Testing (No Jest/Pytest)

Claim: All tests written in Rust, no external test frameworks.

Rejection Criteria (CRITICAL):

• Any Jest, Mocha, Pytest, unittest files
• package.json with test scripts
• requirements-dev.txt with pytest