Most engineers know that LLM inference uses KV cache. Far fewer can precisely explain why K and V are worth caching but Q is discarded after every decode step. The answer comes from the causal mask — and it has direct implications for how you size and optimize serving infrastructure.
The rule against storing JWTs in localStorage gets repeated as dogma, but most developers can't explain the full chain of reasoning — or why the industry is returning to HttpOnly cookies. This post traces the history from stateless JWT enthusiasm to the modern short-lived token + HttpOnly refresh cookie pattern.
The default persist-credentials: true in actions/checkout quietly leaves a GitHub token in a readable file for every subsequent job step. One setting closes the gap — here's why it matters and how to handle workflows that still need git auth.
Microsoft's latest Foundry Agent Service docs read like a managed runtime story, not just another model-hosting layer. That matters for teams shipping enterprise agents into Azure.
The Deployment Pipeline That Pays for Itself Manual deployments are a tax. Every manual step is a potential error, a context switch, and a reason deployments slow down as the team grows. CI/CD pipelin...
GPT-5.4 folds frontier coding, better tool use, and computer interaction into one model. For teams building coding agents or browser automation, that changes the practical baseline.
Why "Just Add a Dockerfile" Goes Wrong The first Dockerfile most developers write looks like this: dockerfile FROM python:3.12 WORKDIR /app COPY . . RUN pip install -r requirements.txt CMD "python", "...
The Monolith We Were Running From Two years ago, a typical internal tool at Foetron was a Flask app serving Jinja2 templates, jQuery for interactivity, Bootstrap for styling, and a PostgreSQL database...
Why OpenWebUI as the Interface Layer OpenWebUI is an open-source, self-hostable chat interface that supports the OpenAI API spec. That compatibility means any system that implements /v1/chat/completio...
The Problem with Unstructured Documents An enterprise generates thousands of documents per month: invoices, compliance reports, technical specifications, contracts, procurement forms. Each document ty...
Automate backups of multiple SQL Server databases directly to Azure Blob Storage.
What Makes a System "Agentic"? An LLM that answers questions is not an agent. An agent is a system that can: 1. Perceive — receive input from the environment (text, images, API responses, files) 2. Pl...
What RAG Actually Solves Large Language Models hallucinate. They also have a knowledge cutoff. And they can't know about your internal documentation, your product catalogue, or your VM specification d...
Why First-Party Pricing Calculators Fall Short The Azure Pricing Calculator is excellent for static estimates. It falls short the moment you need to answer questions like: "If we move from 8 D4s_v3 no...
Why Private Endpoints Break Your DNS (And How to Fix It) Private Endpoints are one of Azure's most powerful security features — they pull a PaaS service (like Azure SQL, Storage, or Key Vault) into yo...
The Problem with Passwords in VDI Environments Traditional Virtual Desktop Infrastructure relies on Active Directory and password-based authentication. In a cloud-first world, that model has three cri...
Why the Monolith Had to Go Every engineering org reaches the same inflection point: the codebase that once shipped features in a weekend now requires a war room to deploy. That was the reality at Foet...
Vercel's AI SDK 5 is a meaningful web-dev release because it tightens the contract between model output, tool state, and UI rendering instead of leaving frontend teams to improvise it.
The Responses API collapses chat plus tool orchestration into a single primitive. That simplifies how teams add web search, file search, and agent execution to real applications.