Index 03 · Notes
03 Writing
Notes from building and running production software.
N°013 2026.06.05 Claude Fable 5: The Most Capable Model Yet, and When It's Worth the Price N°012 2026.06.03 Patient Data Is Different: What HIPAA Demands of Software That Handles PHI N°011 2026.05.31 Hermes Agent: What It Is, Who It's For, and What You Actually Need to Start N°010 2026.05.29 How to Prevent Double-Booking: Make It Impossible, Not Unlikely N°009 2026.05.15 Multi-tenant data isolation belongs in the database, not the code. N°008 2026.05.14 How to Cut AI Costs: Run a Keyword Classifier First, Call the Model Last N°007 2026.05.08 Double-Entry Bookkeeping: Why a Real Money App Can Refuse to Be Wrong N°006 2026.04.29 How to Build Dashboards That Fail Safely, Not Silently N°005 2026.04.13 Private AI That Keeps Your Data on Your Machine N°004 2026.04.01 How to Handle Money in Code: Integer Cents Over Floating Point N°003 2026.03.30 Data Minimization for Sensitive Documents: The Safest Store Is No Store N°002 2026.03.28 Real-Time Data Lies. Build Self-Correcting Systems Against a Source of Truth. N°001 2026.03.23 How to Build Trustworthy AI That Does Not Make Things Up