Claude Skills by onflow

Comprehensive audit and review skill for Cadence smart contracts on the Flow blockchain. Identifies security vulnerabilities, bugs, code quality issues, and optimization opportunities. Produces severity-rated findings (Critical/High/Medium/Low) with actionable fixes. TRIGGER when: auditing, reviewing, or improving Cadence code, checking for security issues, performing code review on .cdc files, looking for anti-patterns or vulnerabilities, optimizing smart contract code, "review cadence", "au...

Comprehensive guide for writing correct, secure, and idiomatic Cadence smart contract code on the Flow blockchain. Covers language fundamentals (resources, contracts, transactions, interfaces, accounts, references, imports), access control and entitlements, capabilities, pre/post conditions, security best practices, anti-patterns to avoid, and proven design patterns. TRIGGER when: writing or debugging Cadence code, asking about Cadence syntax, access(self), access(all), entitlements, resource...

Generate production-ready Cadence smart contracts, transactions, and DeFi transactions from scratch following security-first standards. Scaffolds secure code with proper access control, entitlements, events, storage paths, and phase discipline. TRIGGER when: creating new Cadence contracts, generating transactions, scaffolding DeFi transactions, building smart contracts from scratch, "generate contract", "create transaction", "scaffold", "new contract", "new transaction", "build a contract for...

Guide for writing, running, and debugging unit tests for Cadence smart contracts using the built-in Cadence Testing Framework and `flow test`. Covers test file structure (_test.cdc, setup/beforeEach/tearDown), assertions and matchers, blockchain emulation (accounts, deployments, events, time manipulation), coverage reports, CI integration, and testing patterns. TRIGGER when: writing Cadence unit tests, debugging failing tests, using Test.assert / Test.expect / Test.assertEqual / Test.expectFa...

Guide for developing NFT and Fungible Token contracts on the Flow blockchain using Cadence. Covers NonFungibleToken and FungibleToken interface conformance, MetadataViews integration for marketplace compatibility, collection patterns, minting, standard paths, event emission, and modular NFT architectures for complex traits and evolution. TRIGGER when: building NFT contracts, FT token contracts, implementing NonFungibleToken or FungibleToken interfaces, working with MetadataViews, creating col...

Complete reference for the Flow CLI — the command-line tool for developing, testing, and deploying on the Flow blockchain. Covers project initialization, account management, contract deployment, transaction sending, script execution, dependency management, key generation, scheduled transactions, and emulator usage. TRIGGER when: using the Flow CLI, running flow commands, "flow accounts get", "flow accounts create", "flow init", "flow project deploy", "flow scripts execute", "flow transactions...

Architecture guide for building DeFi protocols on the Flow blockchain. Covers Flow's DeFi-specific advantages (MEV-free EVM, cross-VM atomic transactions, on-chain automation), core DeFi primitives (lending health factors, interest rate kink models, AMM type selection), liquidity bootstrapping strategy (veFLOW, Merkl, CL ranges, bootstrapping benchmarks), and the current Flow DeFi ecosystem map (existing protocols, missing primitives, opportunity analysis). TRIGGER when: designing a lending p...

Guide for setting up a local Flow blockchain development environment from scratch. Covers installing and configuring the Flow CLI, emulator, Cadence MCP server, dev wallet, Cadence VS Code extension, testing framework, frontend SDKs (FCL/React), and EVM tooling (Hardhat/Foundry). Each tool has its own reference with self-contained install and setup instructions. TRIGGER when: setting up Flow development tools, installing Flow CLI, starting emulator for the first time, "how do I install flow",...

Guide for setting up and configuring Flow blockchain projects. Covers flow.json structure (networks, accounts, contracts, dependencies, deployments), FCL frontend integration with React, Flow CLI workflow, emulator setup, testnet/mainnet deployment, environment-based configuration, and multi-network strategies. TRIGGER when: setting up a Flow project, configuring flow.json, setting up FCL, deploying contracts, switching networks, debugging deployment issues, "flow init", "flow emulator", "flo...

Guide for building React applications on the Flow blockchain using @onflow/react-sdk. Covers FlowProvider setup, Cadence hooks (useFlowQuery, useFlowMutate, useFlowCurrentUser, useFlowEvents), Cross-VM hooks for EVM bridging and batch transactions, and UI components (Connect, TransactionButton, TransactionDialog, NftCard). Built on TanStack Query with TypeScript support. TRIGGER when: building React apps on Flow, using @onflow/react-sdk, setting up FlowProvider, using Flow React hooks, "useFl...

Framework for designing token economics for Flow-based protocols. Covers economic first principles (Fisher Equation MV=PQ, Nash equilibrium, mechanism design, behavioral economics), proven design patterns with metrics (Real Yield/GMX, Buyback/Hyperliquid, veToken/Curve) and failure case studies (Olympus, Terra, Anchor), token value accrual mechanisms, TGE launch playbook with 12-week timeline, DAO governance models and attack vectors, and regulatory compliance (Howey Test, SEC precedents, MiC...