06 Oct 2026 · 9 min read
Access Control
Multi Tenant RAG: Enforce Access Control Before Retrieval
A reference architecture for tenant isolation, document ACLs, permission revocation, and authorization tests in RAG systems.
Read moreIDEAS, DECISIONS & LESSONS
Journal
Notes on AI, architecture and building useful products.
11 articles
30 Sep 2026 · 5 min read
architecture
Cohere Just Made Your Embedding Model a Build-Time Decision, Not an Index-Time One
Embed 5 Pro and Fast share one vector space: index once with Pro, query with either model, lose 1.6-2.7% retrieval quality and gain 2.4x query throughput. Here's the actual math for when that trade is worth making.
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14 Sep 2026 · 5 min read
ai
Your Vector Database Benchmark Is Lying to You (Mine Was Too)
Qdrant released a 10-billion-document benchmark dataset on September 1, 2026, built from over a quadrillion brute-force distance calculations. I ran our production filter patterns against the old 1M-vector benchmark we'd been trusting. The gap explains a slowdown we never diagnosed.
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20 Apr 2026 · 15 min read
agent-learning
Agent Learning: Memory, RAG, and Skills That Grow Over Time (Part 10 of 12)
Part 10 of 12 — Make agents smarter over time with long-term memory, RAG, task reflection, and inter-agent knowledge sharing.
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18 Apr 2026 · 19 min read
agentic-ai
Build an Agentic AI System From Scratch: Step-by-Step Implementation Guide
Complete hands-on guide to building a production-ready agentic AI system. From project setup to deployment — every layer implemented with working code, tests, and Docker compose.
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18 Apr 2026 · 12 min read
agentic-ai
Build a $0 Agentic AI System: Architecture That Scales from Prototype to Production
A complete technical guide to building a profitable agentic AI system using only open-source tools — with retrieval, orchestration, tool use, and observability. Includes architecture diagrams and real cost analysis.
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30 Mar 2026 · 6 min read
2026
Data Is the Lifeblood of the AI Agents Era: Why AI Skills + Data Skills Are Inseparable
When everyone uses AI/Agents, models become a commodity. That's when Data becomes the real differentiator — deciding whether your agent runs 'for fun' or 'accurately, optimally, and consistently'. AI Skills and Data Skills are an inseparable duo.
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26 Feb 2026 · 13 min read
ai
AI Hallucination: The Complete Guide to Mitigating Fabrication in Claude, Gemini, Copilot & Cursor
What is AI hallucination? Why does AI invent facts? Learn detailed strategies for minimizing hallucinations in Claude, Gemini, Copilot, and Cursor — from prompt engineering to RAG, grounding, and verification loops.
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24 Feb 2026 · 21 min read
ai
The Voice AI Interview Playbook: Knowledge Base and RAG — Making Your Voice Agent an Expert (Part 6 of 12)
Part 6 of 12 — Your voice interviewer is only as good as what it knows. Here's how to build a real-time RAG system that retrieves rubrics, job descriptions, and technical knowledge in under 50ms.
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