AgentSkillsCN

cairo-storage-optimization

当请求涉及在 Cairo 合约中使用 VecTrait 与 MutableVecTrait、元素寻址，以及各类操作时，讲解如何在 Cairo 合约中采用基于 Vec 的存储方式。

SKILL.md
--- frontmatter
name: cairo-storage-optimization
description: Explain Starknet storage cost optimization, packing values, and bitwise operations; use when a request involves reducing storage slots or implementing packed storage in Cairo.

Cairo Storage Optimization

Overview

Show how to reduce storage costs by packing multiple values into one slot and manipulating bits safely.

Quick Use

  • •Read references/storage-optimization.md before answering.
  • •Use shift and mask operations with core::integer::bitwise or arithmetic.
  • •Mention StorePacking for automatic packing where appropriate.

Response Checklist

  • •Ensure packed values fit within 251 bits total.
  • •Use explicit masks and shifts for extraction.
  • •Consider a custom struct with StorePacking for reusable packing logic.

Example Requests

  • •"How do I pack two u128 values into one storage slot?"
  • •"What is StorePacking in Cairo?"
  • •"How do I unpack a packed storage value?"