Ask HN: How do you give AI enough Java-specific context before code generation?

I’ve been writing Java for 25+ years (mostly enterprise; created pf4j and pippo). When using AI for code generation, I kept seeing the same issues: N+1 queries, poor exception handling, Spring pitfalls, and concurrency problems. The output is often almost right, but misses language-specific details. Instead of iterating prompts, I experimented with pre-loading the model with Java-specific guidelines (JPA, Spring, testing, security) as plain markdown files, so it has domain context upfront. Curious how others handle language-specific context for code generation tools. Repo: https://github.com/decebals/claude-code-java