During a multi-phase task (find every use of a deprecated config flag, design a replacement, then implement it), the session's context fills with search results and file contents before the design phase even begins. What is the most effective change?

Answer: D — Delegate discovery to the Explore subagent, which returns a summary of findings

The Explore subagent runs verbose discovery in its own context and returns a summary, which keeps the main conversation's context available for the design and implementation phases. (A) designs without the facts. (B) still accumulates all the output in the main session. (C) loads bulky, short-lived output into every future session.