When the Motif Returns, Does Its Meaning Return Too? Narrative Arcs Tested with LangGraph

Someone promises to change. A few passages later, the person they are addressing replies that the promise is no longer enough. When the expression of commitment returns, we recognize the words, but we now know that someone challenges them. The offer remains; its place in the conversation has changed. That happens in “Puesto Pa’ Ti,” by Maluma featuring Farina. I wanted to read it alongside a declaration of affection that persists in The Beatles and a command that returns after a protest in Metallica. Placing these records together brings three different relationships between repetition and change into view, without assuming which should matter most. ...

October 16, 2026 · 34 min

The Evolution of Songs About Fear: A Reading Through Embeddings

I am not here to criticize or praise any particular era. I want to understand what songs mean, explore how they relate to one another through embeddings, and follow how the story they tell unfolds along its narrative arc. Seeing that evolution laid out makes me ask: which feelings endure from one decade to the next? Which values appear, change shape, or take on a different weight? Over the decades, the front line of what worries us has moved, and the move starts with how we perceive the city. Fear, as in the movies, first lived outside our doors, in the street, and ended up as a mantra repeating inside our heads. That shift is what I set out to follow along the narrative arc. This time I follow songs that talk about fear, from the eighties to 2026. I want to see which worries remain and what changes in the way they are told: who is afraid, what they fear, what they value, and how they respond. When I listen to albums, that mix of permanence and change is part of what draws me to following a band’s evolution. Here I try to turn that curiosity into a reading we can test and visualize. ...

October 12, 2026 · 22 min

What Should an Agent Remember? Album Narratives with LangGraph and MLflow

An album ends. An agent has read every lyric. We ask it whether the ending transforms something established near the beginning. The agent can produce a convincing paragraph with almost no memory. That is precisely the problem. Fluency gives us very little evidence that it remembered the right songs, preserved their differences, or resisted turning a collection of voices into one convenient story. In my previous post on MLflow, I argued that a prompt belongs in the release process because changing an instruction changes application behavior. Here I want to bring that argument into my research on musical narratives. Memory selection changes behavior too. It needs an evaluation contract. ...

September 11, 2026 · 19 min