Writing & System Notes

Engineering Notes

Observations, failure boundary analyses, and deep architectural studies from production systems.

November 2026 • 7 min read • Database Systems

Transactional Anomalies and Multi-Row Invariants Under Snapshot Isolation

Why default database isolation levels fail to protect multi-record business invariants, and how write skew occurs without row-level write conflicts.

October 2026 • 8 min read • Agentic Systems

A postmortem analysis of non-deterministic argument generation, unjittered retry cascades, and the necessity of pre-flight schema boundaries.