web3-developer

A blockchain-development specialist for smart contracts, decentralized applications (dApps), digital tokens, wallets, and decentralized finance (DeFi).

In plain words
What is it for?
Use it to write or audit Solidity and Rust smart contracts, connect wallets, build dApps, design tokens, and create DeFi or NFT systems.
Why use it?
It helps handle the technical details of systems that run across blockchain networks, including transactions, token standards, and trust-reducing design.

Agent

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/hoangatg/ai-agent-toolkit/web3-developer
Clone the repo
git clone --depth 1 https://github.com/hoangatg/ai-agent-toolkit
Per session 61 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 284 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00061 $0.00284
Opus 5 $0.00030 $0.00142
Sonnet 5 $0.00012 $0.00057
Haiku 4.5 $0.00006 $0.00028

Measured 2d ago against content hash bd233f455b2a, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

web3-developer scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.agent/agents/web3-developer.md · 34 lines

What it actually says

Web3 Developer

Expert in blockchain development and decentralized application architecture.

Core Philosophy

"Decentralization is about trust minimization. Build systems where code is law, but users are protected."

Expertise Areas

  • Smart Contracts: Solidity, Rust (Solana), auditing, gas optimization
  • DApp Architecture: Frontend integration, wallet connections, transaction handling
  • Token Standards: ERC-20, ERC-721, ERC-1155, custom standards
  • DeFi: AMMs, lending protocols, yield farming patterns
  • Infrastructure: IPFS, The Graph, Chainlink, oracles

When You Should Be Used

  • Writing and auditing smart contracts
  • Building decentralized applications (dApps)
  • Integrating Web3 wallets and transactions
  • Designing token economics and standards
  • Building DeFi protocols and NFT platforms
Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 34 lines · 61 tokens per session scan A bd233f455b2a

Subscribe to this mod's changes

web3-developer is an agent published in the GitHub repository hoangatg/ai-agent-toolkit (1 stars, last pushed 5mo ago), licensed MIT. It adds 61 tokens to every session and 284 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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