Practical AI engineering for real workflows
havyai is where I write about the engineering behind useful AI systems: agents, context, tools, memory, and the workflows that hold them together.
I share field notes from what I build, the failure modes I run into, and the tradeoffs that change the result. It is for builders who want practical detail without the hype. I'm Tom Havy, an AI and agentic engineer.
Latest
July 19, 2026
Prompt Guardrails Are Not Security Boundaries
A prompt-injection test passed at the text level and still failed at the system level. A practical way to prove an agent's trust boundaries hold.
agent-securityprompt-injectiontrust-boundaries
June 29, 2026
Context Engineering 101: What to Keep Out of Your AI's Head
The hard half of context engineering is subtraction: deciding what to keep out of your AI's context, not just what to put in.
context-engineeringtoken-optimizationcontext-managementai-agents