blockchain-web3 SKILL.md skillA
blockchain-web3 from travisjneuman/.claude is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add travisjneuman/.claude/blockchain-web3@git:20260328.75c803aPins git:20260328.75c803a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- travisjneuman/.claude
- Path
skills/blockchain-web3/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260328.75c803a, committed Mar 28, 2026
- Size
- 2,937 bytes
- Repository stars
- 105
- License
- MIT
Solidity smart contracts, Web3 development, DeFi protocols, NFTs, EVM chains, Hardhat/Foundry tooling, and blockchain security. Use when writing smart contracts, building dApps, auditing contract security, or integrating Web3 wallets.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# Blockchain & Web3 Development
## Smart Contract Development (Solidity)
### Contract Structure
```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
contract MyToken is ERC20, Ownable {
constructor() ERC20("MyToken", "MTK") Ownable(msg.sender) {
_mint(msg.sender, 1000000 * 10 ** decimals());
}
}
```
### Security Patterns
- **Checks-Effects-Interactions:** Validate → update state → external calls
- **Reentrancy guard:** Use OpenZeppelin `ReentrancyGuard` or `nonReentrant`
- **Access control:** `Ownable`, `AccessControl`, or custom modifiers
- **Integer safety:** Solidity 0.8+ has built-in overflow checks
- **Pull over push:** Let users withdraw rather than sending funds
### Common Vulnerabilities
| Vulnerability | Prevention |
|--------------|------------|
| Reentrancy | `nonReentrant` modifier, CEI pattern |
| Front-running | Commit-reveal schemes, flashbot protection |
| Oracle manipulation | Use Chainlink, TWAP over spot prices |
| Unchecked return values | Always check `transfer()` return or use `safeTransfer` |
…Read the whole file at its exact version.
How to install
mdr add travisjneuman/.claude/blockchain-web3@sha256:a743b551f5fc33b0The line at the top of this page pins the label git:20260328.75c803a, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_tn7ethurkydxdfrm)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Mar 28, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (2937 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
travisjneuman/.claude · 105 stars · license MIT · pushed 2026-10-19 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_tn7ethurkydxdfrm GET https://markdownregistry.com/api/v1/resolve?ref=travisjneuman/.claude/blockchain-web3 GET https://markdownregistry.com/api/v1/blob/a743b551f5fc33b01f69e0e368b5bb62e93cc60f7d3ef38c2403ebfa44a7a0cd
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.