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.

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Orbital schematic combining compute nodes, orbit paths, and 3D printing layers

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 to Olivehurst, themed after The Postman. Field Notes

Route of the Postman

A Costner-themed family dispatch through California and Oregon, with pets, ranch 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.

Data

Hard Negation

A small Rust and spaCy pressure gauge for catching structural collapse in generated text.

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.

01 Frontier model incentives
02 GPU-native systems
03 Founder field reports
04 Sci-fi diagnostics

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