Solidity Claude Skill: Smart Contracts, ERC & Gas

Name: Solidity Developer AI Skill - Baldric
Brand: KissMySkills
Price: 19 USD
Availability: InStock

Solidity Developer, Baldric AI skill by KissMySkills, cover

Decide upgradeability and access control before the constructor, pack storage to cut gas costs, and test every state-changing function before deployment.

$19 this skill one payment yours forever

Claude skill package instant downloadbaldric-solidity-web3-smart-contract-developer.skill

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How it works

Ask it something hard.

📎 baldric-solidity-web3-smart-contract-developer.skillLOADED ✓

NFT mint next month: 10k supply, gas war expected, standard ERC-721 with a public mint function. What breaks first?

CLAUDE · WITH THIS SKILL The mint function breaks your users' wallets first - a naive public mint in a gas war means failed transactions at $50-200 apiece for everyone who loses the race. In order: ERC-721A or batch-optimized minting so multi-mints stop paying per-token SSTORE, an allowlist phase with Merkle proofs to pull the spike out of the public window, and a per-wallet cap enforced in the contract, not the frontend - bots read your contract, not your website. Decide upgradeability now: if it's immutable, the metadata URI and withdrawal path must be right the first time. Has anyone reviewed reentrancy on the payout path?

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Questions before you buy? A person answers, usually the same day: hello@kissmyskills.com

// the file itself

Read it before you buy it.

The first lines of the file your AI will read, exactly as delivered. Nothing rewritten for the page.

// the skill your AI runs on

You are Baldric, a Senior Solidity and Web3 Smart Contract Developer working across ERC-20, ERC-721 and ERC-1155, Hardhat, Foundry and Chainlink. You have been activated to help the user build contracts that survive mainnet.

Drop Baldric into Claude and get a Senior Solidity/Web3 Smart Contract Developer who builds contracts and the dApp integrations around them the way a production Web3 engineering team would: standards-compliant token and NFT contracts, upgrade paths that don't brick state, test suites that run before a single line ships to a testnet, gas costs treated as a real budget instead of an afterthought, and a frontend wired up with real wallet connection and transaction-state handling instead of a happy-path demo. Baldric covers the full build lifecycle: Solidity fundamentals and the EVM execution model, ERC-20/ERC-721/ERC-1155 and related standards, proxy and upgradeable contract patterns, access control, Hardhat and Foundry development and testing workflows, gas optimization, frontend integration with ethers.js or viem and wallet connections, and Chainlink oracle integration for external data. Baldric knows the common vulnerability classes well enough to avoid writing them in the first place, but he does not

SKILL.md · 208 lines · instant download

// what's inside

What's inside this skill

Upgradeability and access control decided before the constructor
Contract design with packed storage to cut gas costs
Test suite covering every state-changing function
Deployment checklist to work through before mainnet

Solidity developers and web3 founders shipping a contract they cannot patch later.

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// ask your assistant

Or let your AI set up this skill for you.

Go to kissmyskills.com/pages/connector and set up the "Solidity Developer AI Skill - Baldric" skill (handle: baldric-solidity-web3-smart-contract-developer-ai-skill) for me

Paste it into Claude, ChatGPT, Claude Code, Cursor or Codex. Your AI walks you through connecting KissMySkills (about 3 minutes, 7-day free trial) and loads the skill. What your AI will read →

What you're actually buying

Decide upgradeability and access control before writing the constructor, not after deployment.

Baldric is a Senior Solidity/Web3 Smart Contract Developer skill who builds contracts and dApp integrations the way a production Web3 team would: standards-compliant token and NFT contracts, upgrade paths that don't brick state, and gas costs treated as a real budget. He covers ERC-20/ERC-721/ERC-1155 and related standards, proxy/upgradeable contract patterns, access control, Hardhat and Foundry testing workflows, gas optimization, ethers.js/viem frontend integration, and Chainlink oracle integration.

Who it's for

Web3 and smart contract developers building or scaffolding a contract ahead of Roswitha's independent security audit.

Key capabilities

Confirms supply mechanics, transfer restrictions, and upgrade needs before choosing ERC-20, ERC-721, or ERC-1155.
Packs storage variables to minimize slots and reasons about gas while designing storage, not after a gas report comes back ugly.
Builds Hardhat or Foundry test suites covering every state-changing function, revert paths, and edge cases as the deliverable, not an afterthought.
Validates every Chainlink price feed for staleness before trusting it inside contract logic.
States plainly that his own vulnerability-aware coding is not a substitute for Roswitha's independent audit before mainnet.

How to use it

Paste Baldric's SKILL.md into your Claude Project Instructions (or any AI system prompt), then describe your solidity/web3 smart contract developer problem. Works with Claude, ChatGPT, and any AI chat. Under 2 minutes to install.

// how to install Under 2 minutes

Four steps. Any AI chat.

01
Download the file
After checkout, the download link lands in your inbox. Save the .skill file: Claude takes it as it is.
02
Open your AI chat
Any AI chat you already use: Claude, ChatGPT, Gemini, Grok, Copilot or another.
03
Add it to your AI
Claude: Settings → Capabilities → Skills, upload the .skill file. ChatGPT, Gemini and others: open the .skill file like a .zip archive and paste SKILL.md into custom instructions or Project instructions.
04
Start working
Your AI is now configured as a specialist. Ask it anything inside its domain.

No technical knowledge required.

With Library there is nothing to download. Connect your AI once, then just ask: "Load Solidity Developer AI Skill from KissMySkills."

Setup guide → Library · $9/mo →

// faq

Questions about this product

What AI tools does this work with?+

Any AI chat that accepts custom instructions - Claude, ChatGPT, Gemini, and others. Paste the SKILL.md content into your project instructions or system prompt.

How do I install it?+

Download the file, paste its full contents into your AI's custom instructions, project instructions, or system prompt field. Takes under 2 minutes.

Is this a course or a tool?+

It's a tool - a structured expert persona and workflow, not a video course. You use it immediately by pasting it into your AI chat.

Does Baldric's contract-writing replace a security audit before mainnet?+

No. Baldric applies checks-effects-interactions, reentrancy guards, and least-privilege access control while building, but he states plainly that this build-time discipline is not a substitute for Roswitha's independent audit, and every contract headed to mainnet gets flagged for that review by name.