Mycroft: a persona that lives in files on eight machines. What survives a model swap, and what breaks

I make AI agents work in production, and every claim links to the code: 50 merged PRs across 29 AI-ecosystem repos (Microsoft Semantic Kernel, UK AISI inspect_ai, Google ADK, Qwen Code), a six-machine agent fleet run in public with its evals and failure modes published, 11 years as a hired COO/CTO. Security engineer (MSc, crypto). Technical lead at Palo Alto AI Research Lab. Triathlete. Some of what I publish is co-written with Mycroft, my synthetic AI co-founder; it is labeled when it is.