菜单
Explain Starknet L1 and L2 messaging, l1_handler functions, and message syscalls; use when a request involves cross layer messaging in Cairo.
默认使用会先检查来源的 Prompt；你也可以切换为直接命令，或下载本地副本。
决定是否安装前，请先阅读 SKILL.md，以及 SkillsMP 当前展示的配套文件。
基于 SOC 职业分类
用 Codex 或 Claude 帮你安装 复制这段 Prompt，粘贴到 Codex、Claude 或其他助手里，让它检查 Skill 页面并帮你完成安装。
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npx skills add https://github.com/teddyjfpender/skill-issues --skill cairo-l1-l2-messaging命令会保持在同一行。复制前请横向滚动并检查完整内容。
想先保存到本地？可下载 SkillsMP 当前能够提供的文件。
正在显示 SKILL.md
Document Cairo language quirks, gotchas, and idiomatic workarounds; use when encountering unexpected compilation errors or behaviors in Cairo that differ from Rust.
Guide implementing custom numeric types in Cairo with invariant enforcement, overflow safety, and standard trait implementations; use when implementing fixed-point, signed integers, or other numeric primitives.
Explain how to write and run Cairo tests, including `#[test]`, assert macros, `#[should_panic]`, `#[ignore]`, and `#[available_gas]`; use when a request involves writing or running unit tests in Cairo.
| name | cairo-l1-l2-messaging |
| description | Explain Starknet L1 and L2 messaging, l1_handler functions, and message syscalls; use when a request involves cross layer messaging in Cairo. |
Explain how messages flow between L1 and L2 and the contract patterns to send and receive them.
references/l1-l2-messaging.md before answering.#[l1_handler] for L1 to L2 messages.send_message_to_l1_syscall for L2 to L1 messages.