Blog

Engineering write-ups on security, offline-first web apps, and the products of xTheo Labs.

• Building a local-first Windows defense monitor: ETW, the Event Log, and MITRE ATT&CK, with zero telemetryWhat I learned building Silent Tears, a Windows security monitor that keeps all its data on the machine, explains every alert with MITRE ATT&CK, and asks before it acts.
• I built a 23-language learning app with zero dependencies and no build step. Here's what offline-first really takesJago Bahasa is an open-source PWA for 23 languages with zero dependencies and no build step. What offline-first really takes: service workers, .gitignore, and testing on plain node --test.