# Layer 2s

> Ethereum L2 landscape — Arbitrum, Optimism, Base, zkSync, Unichain, Celo. How they work, how to deploy, how to bridge, and which to use when. Includes 2025–2026 updates like Celo migration and Polygon zkEVM shutdown.

- Skill: `bankrbot/layer-2s-2` (Agent Skill, multi-file: 3 files)
- Install (CLI): `npx skillmds@latest add bankrbot/layer-2s-2`
- Raw SKILL.md: https://api.skillmd.com/api/skills/bankrbot/layer-2s-2/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: DevOps & Infra
- Author: BankrBot (https://skillmd.com/u/bankrbot)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/bankrbot/layer-2s-2

---


# Layer 2s

Provided by EthSkills. Installs outside this repo — see `catalog.json` `install.command`.