Captain's log / infrastructure desk / fabrication bay

Field notes on compute, markets, and machines.

Sentimark is my public notebook for AI economics, agent behavior, GPU infrastructure, 3D-printed optimism, and the occasional sci-fi-shaped warning label.

Read the log Who is writing?
Orbital schematic combining compute nodes, orbit paths, and 3D printing layers

Signal map

Four frequencies,
one notebook.

Markets, silicon, people, and fiction keep cross-talking here. Each channel is a running thread — different signal, same station.

CH1
Market Tells Pricing, incentives, and the moment a model limitation becomes a business model.
Monetizing a Defect →
CH2
Silicon Paths GPU-native systems, AMQs, and control planes that like the speed of hardware.
The Magic of AMQ →
CH3
Human Field Notes Family, trains, rivers, vacations, and the parts of the work that still have fingerprints.
When Big Boy Came Through →
CH4
Fiction as Sensor Science fiction, routes, and thought experiments that make systems easier to see.
Route of the Postman →

Field notes

All posts
Watercolor landscape of the Feather River with distant hills, cottonwoods, and slow reflective water. Mindfulness

Mindful by the River

A practical, evidence-backed guide for easing persistent worry and anxiety with mindfulness-based cognitive therapy practices.

Hand-drawn route map of a trip from Redwood City to Eugene and back, themed after The Postman. Field Notes

Route of the Postman

A Costner-themed family dispatch through California and Oregon, with pets, two charging stops, Eugene days, and the long road home.

Surreal token furnace illustration showing AI usage, compute heat, and context being burned as fuel. Agents

Monetizing a Defect

How Anthropic's pricing structure turned a known model limitation into a billable feature, and what it signals about the AI subscription era.

Jonathan Corners standing near Union Pacific Big Boy No. 4014 in Marysville, California. Field Notes

When Big Boy Came Through Marysville

A field note from the afternoon Union Pacific Big Boy No. 4014 came through Marysville with steam, noise, friends, family, and a backyard beer afterward.

Diagram showing a positive sentence and hard negative sentence being separated by a negation gauntlet instead of collapsing together in vector space. Data

Hard Negation

Why negation still breaks retrieval systems, and why hard negatives need to be harder than the word not.

Diagram showing generated text parsed by spaCy and scored by a Rust POS-window diversity engine. Data

A Speed Nerd Met spaCy

How a small Rust and PyO3 crate made one POS-window scoring loop roughly 1,500x faster without pretending to replace spaCy.

A warm sci-fi forge scene where human text knowledge is transformed into structured machine-readable vectors. Infrastructure

Why Forge

Why another embedding engine is worth building when retrieval quality, transport shape, and trust boundaries decide what an AI system is allowed to know.

Infrastructure

The Magic of AMQ

Approximate membership queries are one of those quiet infrastructure ideas that feel like cheating until you realize the trick is restraint.

I like tools that make the system legible: profilers, notebooks, slicers, starship schematics, and pricing pages that accidentally confess the business model.