Arbitrum Development Knowledge Base

User Responsibility Notice

This skill provides reference documentation only. All information is sourced from official Arbitrum documentation, open-source smart contract repositories, and MCP tools documentation. However:

• You are responsible for verifying all information before using it in production. AI responses based on this skill may be incomplete, outdated, or misinterpreted.
• On-chain actions are irreversible. If you use MCP tools referenced in this skill to deploy contracts, send transactions, or interact with protocols, always confirm the action, parameters, and target network before proceeding.
• Smart contract code included here is for reference. Do not deploy any contract code without independent review, testing on testnets, and security auditing.
• Never expose private keys or sensitive credentials in prompts or conversations with AI assistants.

Search Instructions

Always search and read files in this skill folder before answering. Do not rely on prior knowledge. Extract exact values (chain IDs, RPC URLs, addresses, commands, code) from the docs.

Context management: Start with narrow grep searches. Use the topic navigation below to identify target files before searching. Read selectively — avoid loading entire folders.

Response Guidelines

• Use section headers, tables, bullet points, and code blocks for clarity
• Put the most important information first (answer at top, details below)
• Follow correct step order for procedural responses
• Use bold for key values the user needs to spot quickly
• Always warn the user when a suggested action involves on-chain execution, gas costs, or private key usage

Decision Guide

Route to the right files based on what the user needs:

Quick Search

Find specific content fast:

# Chain IDs, RPC URLs, network info
grep -ri "chain.*id\|rpc\|endpoint" for-devs/dev-tools-and-resources/

# Stylus contract patterns
grep -ri "sol_storage\|#\[public\]\|#\[entrypoint\]" stylus/

# Bridge addresses and contracts
grep -ri "gateway\|router\|bridge.*address" arbitrum-bridge/ build-decentralized-apps/token-bridging/

# Gas and fees
grep -ri "gas.*price\|l1.*fee\|l2.*fee\|basefee" build-decentralized-apps/ how-arbitrum-works/deep-dives/

# Node configuration
grep -ri "docker\|--chain\|--parent-chain" run-arbitrum-node/

# ArbOS versions and upgrades
grep -ri "arbos.*[0-9]" run-arbitrum-node/arbos-releases/ notices/

Topic Navigation

For the complete file listing of all documentation, see NAV-docs.md.

Root

Overview and general documentation

• Security audit reports

Arbitrum Bridge

Token bridging between Ethereum and Arbitrum chains

• Arbitrum bridge transaction traceability
• Arbitrum embedded bridge widget
• Quickstart: Arbitrum bridge
• USDC on Arbitrum One

Build Decentralized Apps

Building dApps on Arbitrum - cross-chain messaging, oracles, precompiles, token bridging

• Arbitrum chains overview
• Build a decentralized app with Solidity (Quickstart)
• Cross-chain messaging overview
• How to estimate gas in Arbitrum
• SDK support for custom gas token Arbitrum chains
• Subtopics: Arbitrum Vs Ethereum, Nodeinterface, Oracles, Precompiles, Reference, Token Bridging

For Devs

Developer tools, resources, and development frameworks

• Subtopics: Dev Tools And Resources, Oracles, Partials, Third Party Docs

Get Started

Getting started with Arbitrum development

• Get started with Arbitrum

How Arbitrum Works

Technical deep-dives into Arbitrum architecture - BOLD, AnyTrust, gas, sequencing

• Inside Arbitrum Nitro
• Subtopics: Bold, Deep Dives, Timeboost

Intro

Introduction to Arbitrum ecosystem

• Arbitrum glossary

Launch Arbitrum Chain

Launching and configuring Arbitrum Orbit chains

• A gentle introduction: Arbitrum chains
• Arbitrum chain licensing
• Deploy a production chain: an overview
• Migrate between RaaSes
• Migrate from another stack to an Arbitrum chain
• Subtopics: 02 Configure Your Chain, 03 Deploy An Arbitrum Chain, 04 Maintain Your Chain, 05 Customize Your Chain, 06 Third Party Integrations, 07 Arbitrum Node Runners, 08 Ecosystem Support, Concepts, Features, How Tos, Partials

Node Running

Node infrastructure and operations

• Sequencer
• Subtopics: Partials

Notices

Important notices and announcements

• Fusaka Compatibility Notice
• Upgrade notice for ArbOS 51

Partials

• Client Flags
• Reference Nova Specific
• Troubleshooting Arbitrum Chain Partial
• Troubleshooting Bridging Partial
• Troubleshooting Building Partial
• Troubleshooting Nodes Partial
• Troubleshooting Stylus Partial
• Troubleshooting Users Partial
• Additional Configuration Parameters
• Arbitrum Contract Addresses Reference
• Arbitrum Glossary Definitions
• Arbitrum RPC Endpoints Reference
• Arbitrum: Introduction
• BoLD Configuration Parameters
• Chain parameters
• Documentation Contribution Guide
• Faucet list
• Local Development Network Flags
• Multidimensional Content Controls
• Not for Production Warning Banner
• Public Preview Banner
• Third-party RPC Endpoints Reference
• Subtopics: Glossary

Run Arbitrum Node

Running Arbitrum full nodes and validators

• Arbitrum nodes: an overview
• Beacon Nodes: Historical Blobs
• Data Availability
• How to run a feed relay
• How to run a full node for an Arbitrum chain
• How to run a local full chain simulation
• How to run a local Nitro dev node
• L1 Ethereum beacon chain RPC providers
• Troubleshooting: Run a node
• Subtopics: Arbos Releases, More Types, Nitro, Partials, Sequencer

Sdk

Arbitrum SDK documentation - bridgers, entities, messaging

• Introduction
• Migrating from v3 to v4

Stylus

Stylus WASM smart contract development

• A gentle introduction to Stylus
• CLI Tools (cargo-stylus)
• Quickstart: write a smart contract in Rust using Stylus
• Recommended Libraries
• Using Stylus CLI
• Write Stylus Contracts
• Write Stylus Contracts
• Subtopics: Concepts, How Tos, Partials, Reference

Smart Contract Source Code

Reference implementations, code examples, and architectural guides from key Arbitrum repositories.

OpenZeppelin Rust Contracts for Stylus

Production-ready Rust smart contract implementations for Arbitrum Stylus - ERC20, ERC721, ERC1155, access control, proxy patterns, finance utilities, and cryptographic helpers.

• Full index: NAV-openzeppelin-stylus.md
• Directories: Contracts, Docs, Examples

Stylus SDK for Rust

Core Rust SDK for building Arbitrum Stylus contracts - storage abstractions, ABI encoding, proc macros, host I/O, testing framework, and cargo-stylus CLI tool.

• Full index: NAV-stylus-sdk.md
• Directories: Examples, Stylus Core, Stylus Proc, Stylus Sdk, Stylus Test

Nitro Contracts (Solidity)

Core Arbitrum Nitro L1/L2 smart contracts - bridge (Inbox, Outbox, SequencerInbox), rollup management, BoLD challenge protocol, one-step proof verification, and token bridging.

• Full index: NAV-nitro-contracts.md
• Directories: Docs, Src

MCP Tools

Available MCP tools for blockchain operations. After generating a response, check if a relevant MCP tool exists and suggest it to the user.

Full documentation: arbitrum-mcp-tools/index.md

If the MCP tool is not available in the user's environment, suggest the MCP Tools setup guide from the documentation.