Articles about software development, artificial intelligence and technology.https://diegonogueira.blog/en-UShttps://diegonogueira.blog/en/blog/hallucination-comes-from-code-not-the-model/https://diegonogueira.blog/en/blog/hallucination-comes-from-code-not-the-model/In teams using autonomous agents, the biggest hallucination driver isn't the LLM. It's the absence of contracts, gates, and traceability in code.Tue, 14 Apr 2026 00:00:00 GMTAIagentsengineeringhallucinationMCParchitecturemcp-graphhttps://diegonogueira.blog/en/blog/rat-in-the-maze-harness-determinism-autonomous-agents/https://diegonogueira.blog/en/blog/rat-in-the-maze-harness-determinism-autonomous-agents/A classic behavioral psychology analogy reveals the most overlooked principle in building AI agents: without walls, there is no path.Mon, 13 Apr 2026 00:00:00 GMTAIagentsharnessMCParchitecturedeterminismhttps://diegonogueira.blog/en/blog/the-900-dollar-ai-lab-running-70b-models-on-consumer-hardware/https://diegonogueira.blog/en/blog/the-900-dollar-ai-lab-running-70b-models-on-consumer-hardware/I built a $900 setup with an RTX 3060 Ti and ran models from 8B to 70B parameters. The data revealed a phenomenon nobody documented: the GPU Offloading Cliff.Sun, 12 Apr 2026 00:00:00 GMTAILLMshardwareinferenceopen-sourcehttps://diegonogueira.blog/en/blog/lean-startup-in-the-ai-era-how-agents-can-drive-project-methodologies/https://diegonogueira.blog/en/blog/lean-startup-in-the-ai-era-how-agents-can-drive-project-methodologies/I read The Lean Startup in 2026, 15 years after publication. What I found was a framework that fits perfectly with AI agents and mcp-graph as an execution guardrail.Wed, 08 Apr 2026 00:00:00 GMTAILean Startupmcp-graphproject managementagentshttps://diegonogueira.blog/en/blog/ai-for-everything-the-cannon-that-kills-a-mosquito/https://diegonogueira.blog/en/blog/ai-for-everything-the-cannon-that-kills-a-mosquito/Not every problem needs AI. Many have deterministic solutions that are faster, cheaper and more reliable. A practical framework for choosing between AI, no-AI and hybrid approaches.Mon, 30 Mar 2026 00:00:00 GMTAIarchitecturecostsproductivitysoftware developmenthttps://diegonogueira.blog/en/blog/the-foundation-nobody-teaches-you-to-survive-the-ai-era-part-1/https://diegonogueira.blog/en/blog/the-foundation-nobody-teaches-you-to-survive-the-ai-era-part-1/AI does everything. But if you don't understand what's underneath, you're replaceable. The technical fundamentals that separate those who use AI from those used by it.Mon, 30 Mar 2026 00:00:00 GMTAIfundamentalscareermathematicssoftware developmenthttps://diegonogueira.blog/en/blog/auto-dream-how-claude-code-mimics-rem-sleep-to-consolidate-memory/https://diegonogueira.blog/en/blog/auto-dream-how-claude-code-mimics-rem-sleep-to-consolidate-memory/Claude Code just quietly shipped one of the smartest agent features I've ever seen. It's called Auto Dream, and it works like the human brain during sleep.Sun, 29 Mar 2026 00:00:00 GMTClaude CodeAIagentsdeveloper toolsneurosciencehttps://diegonogueira.blog/en/blog/fundamentals-in-the-ai-era-the-quadratic-formula-was-right/https://diegonogueira.blog/en/blog/fundamentals-in-the-ai-era-the-quadratic-formula-was-right/Why chasing frameworks and certifications has become chasing the wind. A philosophical thesis on what truly matters for developers in the age of artificial intelligence.Sun, 22 Mar 2026 00:00:00 GMTAIfundamentalscareerphilosophysoftware developmenthttps://diegonogueira.blog/en/blog/prompt-engineering-beyond-basics-techniques-i-use-daily/https://diegonogueira.blog/en/blog/prompt-engineering-beyond-basics-techniques-i-use-daily/Advanced prompt engineering techniques that go far beyond 'be specific'. Chain-of-thought, few-shot patterns, structured output, system prompts, and context management strategies I rely on in production.Sun, 22 Mar 2026 00:00:00 GMTAIprompt engineeringLLMsproductivitysoftware developmenthttps://diegonogueira.blog/en/blog/rag-in-practice-building-systems-that-actually-work/https://diegonogueira.blog/en/blog/rag-in-practice-building-systems-that-actually-work/A hands-on guide to building Retrieval-Augmented Generation systems that go beyond toy demos. Covering architecture, chunking strategies, embedding models, vector databases, and the real challenges nobody talks about.Sun, 22 Mar 2026 00:00:00 GMTAIRAGLLMssoftware engineeringarchitecturehttps://diegonogueira.blog/en/blog/from-zero-to-product-in-9-days-practical-study-ai-development/https://diegonogueira.blog/en/blog/from-zero-to-product-in-9-days-practical-study-ai-development/A real study on how one person and an AI built a complete software product in just 9 days. Understand the process, the numbers, and the lessons.Wed, 18 Mar 2026 00:00:00 GMTAIsoftware developmentproductivitycase studyClaude/Copilothttps://diegonogueira.blog/en/blog/mcp-graph-open-source-tool-against-vibe-coding/https://diegonogueira.blog/en/blog/mcp-graph-open-source-tool-against-vibe-coding/How execution graphs, local RAG, and multi-agent coordination transform AI-augmented development - and why discipline matters more than prompts.Sat, 14 Mar 2026 00:00:00 GMTAIopen-sourceMCPTypeScriptdeveloper toolsTDDhttps://diegonogueira.blog/en/blog/gitnexus-code-knowledge-graphs-for-ai/https://diegonogueira.blog/en/blog/gitnexus-code-knowledge-graphs-for-ai/An AI agent that doesn't understand your code architecture will break things. GitNexus solves this by turning repositories into navigable graphs with impact analysis and hybrid search.Sat, 28 Feb 2026 00:00:00 GMTAIdeveloper toolsopen-sourcecode intelligenceMCPhttps://diegonogueira.blog/en/blog/autonomous-ai-agents-from-copilot-to-developer/https://diegonogueira.blog/en/blog/autonomous-ai-agents-from-copilot-to-developer/The transition from assistants that suggest code to agents that navigate, understand and modify entire projects. What changed, what works and what still doesn't.Tue, 24 Feb 2026 00:00:00 GMTAIagentsdeveloper toolsproductivityautomationhttps://diegonogueira.blog/en/blog/mcp-the-protocol-that-became-the-usb-of-ai/https://diegonogueira.blog/en/blog/mcp-the-protocol-that-became-the-usb-of-ai/How Model Context Protocol went from an Anthropic project to the industry standard in 5 months. Architecture, why it works and how it changes AI-powered development.Wed, 18 Feb 2026 00:00:00 GMTAIMCPopen-sourcedeveloper toolsarchitecturehttps://diegonogueira.blog/en/blog/the-invisible-cost-of-wasted-tokens/https://diegonogueira.blog/en/blog/the-invisible-cost-of-wasted-tokens/Most developers spend 30-50% more tokens than needed. Understand why this happens, what it actually costs and which techniques reduce waste without losing quality.Thu, 12 Feb 2026 00:00:00 GMTAIproductivitycostsoptimizationdeveloper tools