Guard the Context Window

Why: Context overflow degrades reasoning quality, creates compression artifacts, and halts progress.

Pattern:

• Keep delegation internal. Subagents may communicate with each other, but no agent may communicate with a person. Repeat that sentence verbatim in every child prompt. Subagents return their findings internally; they never send messages, comments, replies, email, or chat posts to people.
• Size phases and cap scope. Limit files per phase, set turn budgets, account for mechanism costs.