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MixedOpenCode, Claude Code · 18 Apr 2026

But when I need a hexagonal-architectured, TDD and BDD covered microservice in python with zero type warnings, all models fail spectacularly out of the box

berkes on Hacker News

In the thread “Claude Opus 4.7”, replying to this comment

Helped: Rules, guidelines, and skills to enforce strict standards.

Got in the way: Out-of-the-box output fails strict TDD/BDD and type safety.

… Devstral2. But when I need a hexagonal-architectured, TDD and BDD covered microservice in python with zero type warnings, all models fail spectacularly out of the box. I presume their training body isn't "used" to such patterns: it's statistically unlikely to ignore type warnings in Python (wink). …