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Hedera Agent Kit v4 Migration

hedera-dev/hedera-skills

This skill should be used when the user asks to "migrate to hedera-agent-kit v4", "upgrade hak v3 to v4", "convert plugin to BaseTool", "migrate Tool to BaseTool", "rename hedera-agent-kit imports", "fix v3 deprecation warnings", or has a project still on `hedera-agent-kit@3.x` / `@hashgraph/sdk` that needs to move to `@hashgraph/hedera-agent-kit@4.x` / `@hiero-ledger/sdk`. Covers both custom-plugin migration (Tool → BaseTool) and toolkit-consumer migration (LangChain/AI SDK/ElizaOS/MCP).

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安装命令

npx skills add https://github.com/hedera-dev/hedera-skills --skill 'Hedera Agent Kit v4 Migration'

SKILL.md

Migrating Hedera Agent Kit v3 → v4

This skill drives a complete v3 → v4 migration. v4 is the current major; v3 (hedera-agent-kit@3.x) no longer receives updates. Use this skill whenever you see code importing from hedera-agent-kit (unscoped) or @hashgraph/sdk.

Quick triage — what kind of v3 code is this?

Before editing anything, classify the file you are migrating. The migration steps differ.

If the file… It's a… Apply
Defines a Plugin and exports tool factories that return object literals with an execute function Custom plugin Plugin migration + BaseTool migration
Calls new HederaLangchainToolkit / HederaAIToolkit / HederaElizaOSToolkit / HederaMCPToolkit Toolkit consumer Toolkit migration
Imports plugins like coreTokenPlugin, coreAccountPlugin, coreHTSPlugin Toolkit consumer (uses built-in plugins) Toolkit migration + alias rename
Imports ResponseParserService or HederaMCPServer from hedera-agent-kit Toolkit consumer Toolkit migration (these moved to toolkit packages)
Both Run toolkit migration first, then plugin migration for each tool

Migration workflow

Step 1 — find every v3 entry point

相关 Skills

hedera-token-servicehedera-dev/hedera-skillsHow to create, manage, and transfer tokens on Hedera using the Hiero JavaScript SDK (@hiero-ledger/sdk). Use this skill whenever the user wants to work with fungible tokens, NFTs, token creation, minting, burning, transfers, token association, custom fees (fixed, fractional, royalty), airdrops, KYC/freeze/wipe/pause operations, or any HTS (Hedera Token Service) operation in JavaScript or TypeScript. Also trigger when users mention @hashgraph/sdk token operations, ERC-20/ERC-721 equivalents on Hedera, or tokenization on the Hedera network.其他574hedera-consensus-servicehedera-dev/hedera-skillsHow to create topics, submit messages, and subscribe to real-time message streams on Hedera using the Hiero JavaScript SDK (@hiero-ledger/sdk). Use this skill whenever the user wants to work with Hedera Consensus Service (HCS), including topic creation, message submission, pub/sub messaging, mirror node subscriptions, chunked large messages, topic fees, or any consensus-related operation in JavaScript or TypeScript. Also trigger when users mention @hashgraph/sdk topic operations, event logging on Hedera, decentralized messaging, audit trails, or ordered message streams.测试与安全569hts-system-contracthedera-dev/hedera-skillsHedera Token Service (HTS) smart contract development. Use when creating, managing, or interacting with Hedera-native tokens via Solidity contracts. Triggers include HTS tokens, Hedera token creation, HTS precompile, token minting/burning on Hedera, KYC/freeze/pause token controls, custom fee schedules, NFT collections on Hedera, or any token operations using the 0x167 precompile.其他490agent-kit-pluginhedera-dev/hedera-skillsThis skill should be used when the user asks to "create a hedera plugin", "build a hedera agent kit plugin", "extend hedera agent kit", "create custom hedera tools", "add hedera functionality", "write a hedera tool", "implement hedera tool", or needs guidance on Hedera Agent Kit plugin architecture, tool definitions, mutation tools, query tools, or parameter schemas using Zod.其他490hss-system-contracthedera-dev/hedera-skillsHedera Schedule Service (HSS) smart contract development. Use when creating or interacting with scheduled transactions from Solidity via the Schedule Service system contract at 0x16b (e.g. scheduleNative for token creation, scheduleCall for generalized contract calls, authorizeSchedule, signSchedule, deleteSchedule, or querying scheduled token info).其他488create-harness-spechedera-dev/hedera-skillsCreate a hedera-harness recipe — PRD, recipe file, validators, and optional stages — by grilling an idea into a runnable feature spec. Use when the user wants to turn a Hedera feature idea into harness inputs.其他487