Lessons from Building a Skill-Scoped Agent Orchestrator

This is a submission for the Gemma 4 Challenge: Write About Gemma 4 Choosing the Right Gemma 4 Model: Lessons from Building a Skill-Scoped Agent Orchestrator I didn't set out to write a post about model selection. I set out to build something: an orchestrator where AI agents can only answer within the boundaries of Markdown files you give them — no hallucinated expertise, no scope creep. Halfway through, I realized the hardest engineering decision wasn't the architecture. It was picking which Ge