Choose the core data structures, ownership, and sequencing first so downstream logic becomes simpler. Use when before writing logic, especially when state or concurrency is involved.
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---
name: principle-foundational-thinking
description: Choose the core data structures, ownership, and sequencing first so downstream logic becomes simpler. Use when before writing logic, especially when state or concurrency is involved.
---
# 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
1. Name the concrete decision this principle changes.
2. Apply the rule to that decision, not as a decorative citation.
3. Prefer evidence from the current repository/runtime over generic preference.
4. If the principle conflicts with an explicit user constraint, keep the constraint and state the tradeoff.
