principle-separate-before-serializing-shared-state git:20260908.f096f61A

Immutable. This exact content never changes and is served at /api/v1/blob/46920c788108c0d7.

---
name: principle-separate-before-serializing-shared-state
description: Eliminate unnecessary sharing or partition ownership before adding locks, queues, or coordination. Use when concurrency, locks, queues, shared state, or complex coordination are being considered.
---
# Separate Before Serializing Shared State

## Trigger

When concurrency, locks, queues, shared state, or complex coordination are being considered.

## Rule

Eliminate unnecessary sharing or partition ownership before adding locks, queues, or coordination.

## 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.