Developer Tools

Read-only factual data about historical Ethereum mainnet contracts. Use when the user asks about a specific contract address, early Ethereum contracts, deployment era, deployer, bytecode, decompiled code, or documented history (what a contract is and is not). Data is non-opinionated and includes runtime bytecode, decompiled code, and editorial history when available. Base URL https://ethereumhistory.com (or set BASE_URL for local/staging).

Write JavaScript code in n8n Code nodes. Use when writing JavaScript in n8n, using $input/$json/$node syntax, making HTTP requests with $helpers, working with dates using DateTime, troubleshooting Code node errors, or choosing between Code node modes.

End-to-end Solana development playbook (Jan 2026). Prefer Solana Foundation framework-kit (@solana/client + @solana/react-hooks) for React/Next.js UI. Prefer @solana/kit for all new client/RPC/transaction code. When legacy dependencies require web3.js, isolate it behind @solana/web3-compat (or @solana/web3.js as a true legacy fallback). Covers wallet-standard-first connection (incl. ConnectorKit), Anchor/Pinocchio programs, Codama-based client generation, LiteSVM/Mollusk/Surfpool testing, and security checklists.

Application security and infrastructure security expert. Use when reviewing code for vulnerabilities, implementing authentication/authorization, securing APIs, hardening infrastructure, threat modeling, implementing encryption, or conducting security audits. Covers OWASP Top 10, secure coding, DevSecOps, and compliance.

Analyzes existing brownfield projects to map documentation to SpecWeave's structure (PRD/HLD/Spec/Runbook). Use when migrating existing projects to SpecWeave, scanning legacy docs, or creating project context maps. Detects external tools (JIRA, ADO, GitHub) and supports incremental or comprehensive migration paths.

Pre-install security scanner for AI agent skills. Detects malicious patterns before you trust code. Local-first — code never leaves your machine.

React and Next.js performance optimization patterns. Use when writing, reviewing, or optimizing React code for web apps, Remotion videos, or any React-based UI. Covers waterfall elimination, bundle optimization, re-render prevention, and server-side patterns.

Fast local search for markdown files, notes, and docs using qmd CLI. Use instead of `find` for file discovery. Combines BM25 full-text search, vector semantic search, and LLM reranking—all running locally. Use when searching for files, finding code, locating documentation, or discovering content in indexed collections.

Build and manage monorepos with Turborepo, Nx, and pnpm workspaces — covering workspace structure, dependency management, task orchestration, caching, CI/CD, and publishing. Use when setting up monorepos, optimizing builds, or managing shared packages.

Format commit messages using the Conventional Commits specification. Use when creating commits, writing commit messages, or when the user mentions commits, git commits, or commit messages. Ensures commits follow the standard format for automated tooling, changelog generation, and semantic versioning.

Profile and optimize application performance. Use when diagnosing slow code, measuring CPU/memory usage, generating flame graphs, benchmarking functions, load testing APIs, finding memory leaks, or optimizing database queries.

Self-reflection specialist that analyzes completed work for quality issues, security vulnerabilities, and improvement opportunities. Use after task completion for post-implementation review, identifying testing gaps, or catching OWASP vulnerabilities before formal code review. Covers technical debt assessment and lessons learned analysis.