omo vs oms: Fallback Chains Deep Dive
This is Part 2 of When Your AI Coding Tool Needs Three Configs. Part 1 covered the config design, file structure, and orchestration philosophy. This article focuses on fallback mechanisms. omo = oh-my-openagent, oms = oh-my-opencode-slim. Model and provider names are anonymized as provider-a/model-x etc. Why Bother Understanding Fallback omo and oms both support fallback—automatic switching to backup when the primary model is unavailable. But their mechanisms differ completely: omo is a multi-layer pipeline that degrades step by step; oms uses startup model selection + runtime abort retry. You need to understand this difference to configure a reliable chain. ...