Categories

How to Install

How to install Uptime Kuma for basic monitoring

Uptime Kuma installs with Docker Compose in about ten minutes: define a service with the official louislam/uptime-kuma image, a persistent volume at /app/data and port 3001, bring the container up with docker compose up -d, then create the admin user on first access from the browser.

Tools

Dokku: the small PaaS that never dies

Dokku lleva más de una década como el PaaS mínimo de código abierto preferido por quien quiere la experiencia Heroku sin la factura. En 2025, con Heroku renaciendo bajo Salesforce y con Kubernetes dominando, sigue ocupando un nicho sorprendentemente saludable.

Architecture

Agent-to-agent protocols: the next open layer

With MCP solving the agent-to-tool layer, a parallel problem surfaces: how do two agents from different vendors communicate with each other. Google's Agent2Agent protocol, donated to the Linux Foundation in June 2025, tries to fill that gap with an open standard.

Artificial Intelligence

Phi-3 on the edge: Microsoft’s SLM in 2025

Phi-3 es la familia de modelos pequeños de lenguaje que Microsoft viene puliendo desde abril de 2024 con variantes de 3.800 millones, 7.000 millones y 14.000 millones de parámetros. Después de año y medio, el panorama del edge con SLM abiertos se ha vuelto serio y Phi-3 ocupa un sitio claro.

How to Install

How to install restic for encrypted backups

restic is the encrypted, deduplicated, incremental backup tool I run in production on several servers. A practical guide to installing it on Debian, setting up an S3-compatible repository, automating daily backups with systemd, and verifying that restore actually works before you need it.

Artificial Intelligence

LLM guardrails: frameworks and their real cost

Guardrails frameworks promise to filter language-model inputs and outputs to block data leaks, harmful content, or hallucinations. After evaluating four of the most popular ones in production, I cover what they actually do, what latency and billing cost they add, and when they pay off over simpler controls.

Artificial Intelligence

AI agent observability: what to instrument first

Agents that chain calls to models, tools and memory are hard to debug without instrumentation designed for them. After a long year running agents in production, I cover what to measure first, which standards are consolidating, and which costly mistakes are avoided by getting the traces right from the start.

Architecture

gVisor: sandboxing for multi-tenant containers

gVisor interpone un kernel en espacio de usuario entre el contenedor y el anfitrión. Después de años en producción en Google y adopción creciente en plataformas serverless, merece una lectura honesta sobre cuándo compensa frente a microVMs y runtimes clásicos.