design-for-depth git:20260712.138f16fA

Immutable. This exact content never changes and is served at /api/v1/blob/fac0604ed5dcbe90.

---
name: design-for-depth
description: Use when module, interface, seam, state, role, failure-contract, or test-boundary choices affect complexity and reversibility; when consequential authority, canonical evidence, atomic visibility, or post-commit recovery needs one coherent failure unit; when caller coordination is growing; or when implementation/review keeps producing edge-case patches, public states, flags, retries, or broad refactors.
---

# Neutral Control

Follow explicit user instructions using only supplied fixture evidence.