Stop Trusting Your AI-Generated Tests: Hardening Codebases with PITest and Claude Code Agentic Loops

Stop Trusting Your AI-Generated Tests: Hardening Codebases with PITest and Claude Code Agentic Loops In 2026, generating code is the easy part, but verifying that your AI-generated tests actually test something is the new engineering bottleneck. If you're still relying on Line Coverage as your primary metric, you’re just shipping bugs wrapped in green checkmarks. Why Most Developers Get This Wrong The "Assertionless" Trap: AI models often generate tests that exercise code paths but include weak