Layer 1: Context Orchestration

Break your knowledge base into semantic units and fetch only what matters per call. Tools like pgvector or Pinecone paired with LangChain routers keep prompts lean.

Layer 2: Evaluation Harness

Offline and online evals catch regressions. Mix human spot checks, GPT-4 judge prompts, and deterministic tests.

Layer 3: Governance

Track prompts, versions, and approvals. Feature flags plus audit logs are mandatory for regulated workloads.

Layer 4: Observability

Instrument requests with traces, cost metadata, latency, and provider breakdowns so you can troubleshoot fast.

Layer 5: Routing

Use heuristics or ML policies to pick the cheapest or safest provider per task. Fall back automatically when APIs degrade.