rb-n1-check

name	rb:n1-check
description	Diagnosing N+1 query patterns in Rails/Grape: slow index pages, serializers, nested API responses. Triggers: "N+1", "includes", "preload", "bullet warning".
argument-hint	[path|feature]
effort	medium

N+1 Check

Look for:

• loops that hit associations lazily
• serializers/presenters causing repeated loads
• controller or endpoint code that fetches parents and then children one-by-one
• missing preload strategy for nested responses
• places where strict_loading or Bullet-style checks would surface the problem earlier

References

Need	Reference
preload / includes / eager_load decision matrix	${CLAUDE_SKILL_DIR}/references/preload-patterns.md
broader query optimization (CTEs, window functions, batched inserts/updates)	${CLAUDE_SKILL_DIR}/references/query-optimization.md