Foundational Thinking
Trigger
Before writing logic, especially when state or concurrency is involved.
Rule
Choose the core data structures, ownership, and sequencing first so downstream logic becomes simpler.
Application
- Name the concrete decision this principle changes.
- Apply the rule to that decision, not as a decorative citation.
- Prefer evidence from the current repository/runtime over generic preference.
- If the principle conflicts with an explicit user constraint, keep the constraint and state the tradeoff.