Scaling 120+ AI Agents: Two-Tier Orchestration, Hybrid Retrieval, and the Architecture That Holds It Together

Scaling to 120+ AI Agents Without Losing Control

TLDR: A solutions architect shares the full architecture behind Screech, a personal multi-agent system with 128 specialized subagents, a two-tier orchestration layer, and a hybrid retrieval pipeline backed by a single database. The core lesson: the problem with AI agents that try to do everything is not the model — it is the architecture.

Scaling to 120+ AI Agents Without Losing Control