B-500Field Notes
Field Notes
What the work taught, written down while it was fresh
Shorter pieces written close to the work: what a system taught while it was still being built, before the lesson had time to round itself off.
- Scale
- 1:1
- Rev
- C
- Issued
- 2026.09
- Sheets
- 10
- B-501Reinforcement Learning After the Reward ModelHow reasoning models are actually trained now: verifiable rewards instead of learned ones, GRPO and its descendants, RL compute that scales on a curve, and agents trained inside environments. With the engineering lessons for anyone shipping LLM systems.
- B-502World Models, As Issued: The State of the Set in October 2026A field survey of where world models actually stand: V-JEPA 2.1, LeJEPA, Dreamer 4, Genie 3, Marble and Atlas, Cosmos, and a billion-dollar bet in Paris. What shipped, what it cost, and what it is for.
- B-503Experimental UI as an Engineering DisciplineWhy treating experimental UI and creative front-end as engineering, not “designer code”, raises the bar for both art and performance.
- B-504Architecture Design for Healthcare AIHow to design AI systems in healthcare: compliance, safety, and the primacy of the clinician in the loop.
- B-505AI in Restaurant AutomationWhere AI actually helps in restaurant operations, order prediction, inventory, and kitchen flow, and where it’s hype.
- B-506Systems Thinking for FoundersWhy founders who think in systems ship better products and make fewer irreversible mistakes.
- B-507Performance Engineering on Static HostingHow to hit Lighthouse 95+ and sub-second FCP when you have no server: budgets, critical path, and discipline.
- B-508Building SaaS with a Zero-Dependency MindsetWhy minimizing dependencies is a strategic advantage in SaaS, and how to do it without reinventing the wheel.
- B-509DNS-Level Ad Blocking. System DesignHow to design a DNS-based ad blocking system: architecture, tradeoffs, and what you give up when you block at the resolver.
- B-510AI Infrastructure PhilosophyWhy the best AI systems treat infrastructure as a first-class product, and how to think about reliability, scale, and operator experience.
End of schedule10 notes
B-500record
- sheet
- B-500
- title
- Field Notes
- subtitle
- What the work taught, written down while it was fresh
- discipline
- B · Field Notes
- scale
- 1:1
- revision
- C
- issued
- 2026.09
- refs
- E-600, S-201
- series
- B-5xx
- count
- 10