Subagent delegation

When to use

• User lists numbered exploration goals (files, entry points, data flow, pain points)
• Task is breadth-first across many files; parent session should stay lightweight
• User says "explore in readonly mode" or references agent/subagent branches

Spawn contract

Give the subagent:

1. Scope — directory or repo root (use {REPO_ROOT} in notes)
2. Readonly — explore agents should not implement unless asked
3. Return format (required):
   • File tree with one-line purpose per file
   • Mermaid or bullet flow (entry → core → output)
   • Pain points / readability notes
   • Direct answers to numbered questions