Learn it properly. Then prove it, one explained question at a time.

Models, tokens, the context window, and every surface you can call Claude through.

Structure, examples, reasoning, and prefill — turning instructions into reliable behaviour.

Caching, compaction, memory, and citations — managing the scarcest resource in the system.

Giving Claude hands: tool schemas, the tool loop, and the Model Context Protocol.

Workflows vs. agents, subagents, and building loops that finish.

Chunking, hybrid search, reranking, contextual retrieval — and when not to use RAG at all.

Evals, LLM-as-judge, tracing, and shipping changes without guessing.

Injection defence, guardrails, privacy, and the responsible-deployment posture.

Making it fast, cheap and resilient once real traffic arrives.