Spec Driven Development (SDD) vs Plan Research Implement (PRI) using claude : r/ClaudeAI

In the talk he mentions basically that you spin up sub-agents to know what files to look at and what functions so it can go back to the agent with info like: look at file a.js, functions foo (1,5); bar (27, 50), b.js functions bas (66, 88). Where (x, y) are line numbers.