Notes on AI, infrastructure, and software engineering
On-chain post-mortem of the 2026-06-20 counter-MEV honeypot that drained the jaredfromsubway.eth sandwich bot of ~$7.5M: root cause, the block-armed mint/consume switch, the transferFrom sweep, and hardening notes — with every address and tx hash.
Visual-first tour of the Grammar Quest backend — pipeline timeline, data-shape diagrams, sprite cache decision path, eval harness flow, judge dimensions, CEFR matrix.
Building an AI engine where your grammar errors mutate the game world in real time — and the architecture is stranger than you'd expect.
Real data from 315 Claude Code sessions reveals how context size, caching, and tool-use chains shape API costs. Interactive chart with 20K+ data points.