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AI Jun 11, 2026

From RAG to Enterprise-Grade RAG Part 09 | Make documents actually enter, stay governed, and stay queryable: from ingestion to document APIs

Part 08 bundled four capabilities into five query modes, but no matter how strict the query-side routing gets, a broken document side still breaks the system — user A pulling user B's contract, header spoofing to impersonate other users, deleting a file and losing the chunks. This post walks through the seven stations a document actually travels after upload (parsing → raw storage → Postgres metadata → ingestion queue → auth/permission → document APIs → citation viewer), with the focus on the often-overlooked claim that the Vector DB cannot be the source of truth, four ACL failure scenarios (header spoofing / no tenant filter / app-layer filter with no RLS / JWT without membership check), and the citation viewer's payload as the last mile of explainability. Document-side seven stations (Part 09) + query-side five modes (Part 08) = the full production RAG closure.

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AI Jun 10, 2026

From RAG to Enterprise-Grade RAG Part 08 | One /ask endpoint, how do you know whether this query deserves a faithfulness check

Part 07 wired up four production-grade capabilities — faithfulness, citation, Langfuse tracing, cost tracking — but running them on every query blew latency and cost. This post bundles the four into five query modes (fast / safe / deep_eval / creative / agentic) and routes automatically using six query features (cheap / medium / LLM-fallback). One /ask endpoint, dynamic per query. Concrete workloads: Q3 contract goes to safe, FAQ goes to fast, debug goes to deep_eval, summarisation goes to creative, multi-step tasks go to agentic. Five failure scenarios (router sends contract to fast / Step 6 default flipped to fast / fast gets rerank bolted on / deep_eval opened on user path / traffic spike triggers mode consolidation) and the guardrails for each. Routing concept aligns with LangChain RouterChain's official pattern and LlamaIndex's RouterQueryEngine workflow, not a new invention.

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AI Jun 10, 2026

From RAG to Enterprise-Grade RAG Part 07 | Where Production RAG Dies: Measurability, Debuggability, Controllability

Demo-stage RAG looks reasonable, but production-grade RAG dies from answers that look correct but aren't. This article unpacks 3 production-grade capabilities — Measurable (faithfulness / citation check + RAGAS), Debuggable (Langfuse query-level + stage-level tracing), Controllable (deterministic-first + async evaluator + cost tracking) — with a Step 1-7 build order, 6-item production launch checklist, and 5 query modes bridging to Part 08. Faithfulness / Citation check + RAGAS offline eval + Langfuse tracing align with industry RAG evaluation standards (RAGAS, Langfuse, DeepEval official docs).

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AI Jun 10, 2026

From RAG to Enterprise-Grade RAG Part 06 | Why Retrieval Decides RAG Quality More Than the Model Does

Vector search finds semantic neighbours, not answers. This piece opens with a concrete failure case, then breaks down the four retrieval-layer upgrades (hybrid retrieval, reranking, parent expansion, citation assembly) and the specific trade-offs they carry across quality, cost and explainability. Each retrieval layer still has clear marginal upside; upgrading the LLM does not — and the budget line that follows from that.

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