viem
Viem blockchain client patterns for Ethereum interactions, transactions, signing, encoding, and smart contract calls. Triggers on viem, publicClient, walletClient, chain, abi.
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Installation for Agentic Skill
View all platforms →skilz install settlemint/agent-marketplace/viem skilz install settlemint/agent-marketplace/viem --agent opencode skilz install settlemint/agent-marketplace/viem --agent codex skilz install settlemint/agent-marketplace/viem --agent gemini
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Extract and copy to ~/.claude/skills/ then restart Claude Desktop
git clone https://github.com/settlemint/agent-marketplace cp -r agent-marketplace/devtools/skills/viem ~/.claude/skills/ Need detailed installation help? Check our platform-specific guides:
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Agentic Skill Details
- Owner
- settlemint (GitHub)
- Repository
- agent-marketplace
- Type
- Other
- Meta-Domain
- N/A
- Primary Domain
- N/A
- Market Score
- 80.0
Agent Skill Grade
B
Score: 80/100
Click to see breakdown
Score Breakdown
Areas to Improve
- Skill mentions viem replaces ethers.js but has no trigger for migration use case
- Evolution section discusses future possibilities rather than actionable guidance
- Banned items use gerund phrases inconsistently with rest of skill
Recommendations
- Add trigger phrases to description for discoverability
- Add table of contents for files over 100 lines
Graded: 1/18/2026
Developer Feedback
I took a look at your viem skill and wanted to share some thoughts.
Links:
You're at 80/100 (B Grade)
This is a solid skill with good fundamentals. You're hitting strong marks on Spec Compliance (13/15) and Utility (17/20), which means the core skill is well-structured and actually solves a real problem. The areas holding you back are mostly around refinement—better discoverability and tighter token economy.
What's Working Well
- Strong trigger coverage. You've got both intent triggers ("read from blockchain", "write to blockchain") and artifact patterns with regex—that's good thinking for matching different LLM outputs.
- Solid code examples. The PublicClient/WalletClient setup and waitForTransactionReceipt patterns give LLMs concrete, copyable code to work with. That's exactly what makes a skill useful.
- Clear constraints. You've spelled out what's banned and required (error handling, gas estimation, confirmation waits)—LLMs understand these boundaries well.
The Big One: Missing Migration Trigger
Here's what jumped out: you mention viem replaces ethers.js but have no trigger for it. This is leaving discovery on the table. A lot of developers coming to AI asking "how do I migrate from ethers?" won't find your skill because you don't have that trigger phrase.
Fix: Add to your triggers array:
triggers:
- 'ethers.js replacement'
- 'migrate from ethers'
- 'ethers to viem'
This alone could bump you +1-2 points just by improving Ease of Use (Discoverability).
Other Things Worth Fixing
Evolution section is padding. Your "Extension Points and Timelessness" subsections read like forward-looking fluff rather than actionable guidance. Either move this to a reference file or trim it—saves tokens and keeps focus sharp. +2 points potential.
Constraints voice inconsistency. You've got "Missing error handling for blockchain operations"—that's a second-person critique mixed with your imperative voice elsewhere. Pick one: either "Omit error handling..." or reframe as noun phrases. Small but it reads cleaner. +1 point.
Add a trigger for error handling context. You emphasize it heavily, so add triggers like "blockchain error handling" or "transaction failures"—helps LLMs route to your skill when they're dealing with real-world failure scenarios.
Quick Wins
- Add the three ethers.js migration triggers (biggest bang for buck)
- Trim the evolution section for token efficiency
- Fix the voice inconsistency in constraints
- Consider adding error handling as a trigger
You're in good shape here—these are polish-level fixes that'll push you to 85-87/100 range.
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