An invariant-driven methodology for designing and reviewing payment systems, packaged as a Claude Code skill that reviews against nineteen invariants.
13 min read · April 2026
Writing
Why algorithmically optimal schedulers destroy user trust, and the engineering patterns that prevent schedule churn.
20 min read · March 2026
Why orchestration, retries, state, and observability matter more than prompt engineering.
11 min read · March 2026
Why every workflow, event consumer, API, and AI agent needs idempotency guarantees.
10 min read · January 2026
Event ordering, retry amplification, and the hidden coupling that turns multi-step workflows into debugging archaeology.
8 min read · January 2026
Why observability matters more than performance and how to design for incident response.
10 min read · December 2025