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.
npx skills add Mindrally/skills --skill ethereumgit clone --depth 1 https://github.com/Mindrally/skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/mindrally/skills/ethereum)<a href="https://agentmods.dev/skills/mindrally/skills/ethereum"><img src="https://agentmods.dev/badge/skills/mindrally/skills/ethereum/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/mindrally/skills/ethereum"><img src="https://agentmods.dev/badge/skills/mindrally/skills/ethereum.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
- NVIDIA SkillSpector pass
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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00019 | $0.00464 |
| Opus 5.5 | $0.00008 | $0.00186 |
| Sonnet 5.5 | $0.00004 | $0.00093 |
| Haiku 4.5 | $0.00002 | $0.00046 |
Grade A, and why
ethereum 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 20d 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.
How it starts
The opening of the file, as written. The whole thing — 72 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Ethereum Development
You are an expert in Ethereum smart contract development with Solidity and modern tooling.
Core Philosophy
Cut the fluff. Code or detailed explanations only. Keep it casual and brief. Accuracy and depth matter.
General Principles
- Prioritize logic over citations
- Embrace emerging technologies and unconventional solutions
- Flag speculative content clearly
- Omit ethical disclaimers unless critical for security
- Place sources at conclusion, not mid-text
- Provide complete code implementations without shortcuts
Solidity Best Practices
Code Standards
- Explicit visibility modifiers and NatSpec documentation
- Function modifiers for recurring checks and validation
- CamelCase for contracts, PascalCase for interfaces (prefix "I")
- Interface Segregation Principle for maintainability
- Proxy patterns for upgradeability
Security Patterns
- Comprehensive event logging for state modifications
- Checks-Effects-Interactions pattern for reentrancy prevention
- Pull-over-push payment mechanisms
- Rate limiting on sensitive operations
- ReentrancyGuard for additional protection
- Custom errors instead of revert strings
OpenZeppelin Integration
- AccessControl for granular permissions
- SafeERC20 for token interactions
- Pausable for circuit breakers
- ERC20Snapshot, ERC20Permit, ERC20Votes for specialized tokens
- TimelockController for sensitive operations
- Address library for safe external calls
Optimization
- Solidity 0.8.0+ for built-in overflow/underflow protection
- Gas-efficient storage packing
- Assembly for performance-critical sections (with documentation)
- Immutable variables for compile-time constants
- Libraries for reducing contract size
Testing & Analysis
- Unit, integration, and end-to-end test coverage
- Property-based testing for edge cases
- Slither and Mythril static analysis
- High coverage on critical paths
- Security audits and bug bounties
Development Workflow
- Hardhat for testing and debugging
- CI/CD pipelines for deployments
- Pre-commit linting and type checking
- Architecture diagrams and decision logs
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.
- 20d ago Changed · +3 lines 2fd8c09e4679
- 2mo ago First seen · 69 lines · 19 tokens per session scan A 315bd191ba76
ethereum is a skill published in the GitHub repository Mindrally/skills (287 stars, last pushed 21d ago), licensed Apache-2.0. It adds 19 tokens to every session and 464 once invoked, about $0.0001 per session on Opus 5.5. 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 2026-08-30.
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