I added a AI Scala learning companion to my IntelliJ workbench
One button turns my open Scala file into a focused lesson. How I built a native IntelliJ panel with Codex, connected DeepSeek, and used an unfinished class as the first real example.
Field Notes
A working notebook.
Always in progress.
Notes on event-driven Java, Spring Boot, Kafka, and secure systems for regulated banking.
Jev and the case for a decision layer in AI systems
What happens when an AI model returns typed decisions and probabilities instead of generating an answer? A look at Jev, calibration, and a possible fast path inside the agent runtime.
I built a Scala workbench with Codex, then made it look like me
A real IntelliJ development instance, a Scala-focused plugin, and my own graphite theme and hoodie mascot. The architecture, desktop screenshots, and tests behind the first working milestone.
Scala and the JVM · Part 3
Scala: Part 3: A Policy Lookup That Might Find Nothing
From Java Optional to Scala Option: represent presence with Some, absence with None, and handle both outcomes with a match expression using our runnable policy lookup.
Scala and the JVM · Part 2
Scala: Part 2: Classes, Case Classes, and What Equality Means
From a Java-style policy class to Scala 2 case classes: constructor properties, value equality versus identity, and copying data without changing the original.
Scala and the JVM · Part 1
Scala: Part 1: From Java to Scala with a Runnable sbt Project
Starting Scala 2 from Java and Spring: val and var, expressions, a first method, and a small sbt project you can run. The first step in the Scala/Play series.
Two Initials, a Shared Identity: Bringing the ZB Monogram to My Website
I chose a flat ZB monogram, rebuilt it as SVG, and carried it across my portfolio, blog and FOCUS headers. Here are the design choices, the shared-asset surprises, and the checks behind the release.
Cross-Entropy: Understanding the Minus, the Log, and the Loss
Cross-entropy looked difficult to me. Let’s unpack −ln(p) from one correct token, understand every symbol, and verify the maths in PyTorch.
Security and privacy, in practice
How to Redirect Keycloak to One Identity Provider
My Keycloak broker showed a username/password form beside LinkedIn even though LinkedIn was the only supported recruiter identity. Here is how I replaced that ambiguous page with a fail-closed browser flow.
LLMs, the whole thing · Part 10
Building GPT from Scratch: LayerNorm, GELU, Shortcuts, and the First Generated Token
Chapter 4 is the moment attention becomes a complete GPT. I build the model one inspectable component at a time, count its parameters, and trace the gloriously untrained first token.