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Technology12 Sept 2026

Event-driven architecture: idempotency and duplicate-message tests

Process one event twice with Node.js and SQLite. A runnable example of transactions, rollback, retries and identity conflicts.

013 min read

Technology28 Aug 2026

RAG evaluation: separate retrieval from answer quality

A runnable Node.js example covering recall, precision, answer omissions and out-of-corpus questions. Synthetic data, actual test output and limitations.

023 min read

Technology17 Jul 2026

Interfaces for uncertain systems

Design patterns for communicating confidence, latency, partial results and recovery without presenting uncertainty as certainty.

032 min read

Technology04 Jun 2026

Performance is an interface decision

A product-focused method for setting performance budgets, protecting visual stability and measuring the complete user journey.

042 min read