Agent skill

Vechain Core

Core VeChain development — SDK usage, fee delegation (VIP-191), multi-clause transactions, dual-token model, legacy migration, and general VeChainThor development patterns.

MITAuto-check passedAgent Workflows

Install Vechain Core

skills CLI

$ npx skills add vechain/x-app-template --skill vechain-core -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI

$ gh skill install vechain/x-app-template vechain-core --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy

$ git clone --depth 1 https://github.com/vechain/x-app-template.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.agents/skills/vechain-core .claude/skills/vechain-core && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Paste into Claude Code

Install the "vechain-core" agent skill from https://github.com/vechain/x-app-template/tree/main/.agents/skills/vechain-core into .claude/skills/vechain-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vechain-core", then confirm the skill loads.

Claude Code copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

$skill-installer

$skill-installer install https://github.com/vechain/x-app-template/tree/main/.agents/skills/vechain-core

Type this inside Codex. $skill-installer <name> installs a curated skill from openai/skills. The installer writes to $CODEX_HOME/skills (default ~/.codex/skills). Restart Codex if the skill does not show up.

skills CLI

$ npx skills add vechain/x-app-template --skill vechain-core -a codex

Project install goes to .agents/skills/; add -g for ~/.codex/skills/.

GitHub CLI

$ gh skill install vechain/x-app-template vechain-core --agent codex

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vechain/x-app-template.git skills-src && mkdir -p .agents/skills && cp -r skills-src/.agents/skills/vechain-core .agents/skills/vechain-core && rm -rf skills-src

Use ~/.agents/skills/ instead of .agents/skills for a personal install.

Codex skills documentation · loads skills from .agents/skills/

Paste into Codex

Install the "vechain-core" agent skill from https://github.com/vechain/x-app-template/tree/main/.agents/skills/vechain-core into .agents/skills/vechain-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vechain-core", then confirm the skill loads.

Codex copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add vechain/x-app-template --skill vechain-core -a cursor

Project install goes to .agents/skills/; add -g for ~/.cursor/skills/.

GitHub CLI

$ gh skill install vechain/x-app-template vechain-core --agent cursor

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vechain/x-app-template.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/.agents/skills/vechain-core .cursor/skills/vechain-core && rm -rf skills-src

Use ~/.cursor/skills/ instead of .cursor/skills for a personal install.

Cursor skills documentation · loads skills from .cursor/skills/, .agents/skills/, .claude/skills/, .codex/skills/

Paste into Cursor

Install the "vechain-core" agent skill from https://github.com/vechain/x-app-template/tree/main/.agents/skills/vechain-core into .cursor/skills/vechain-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vechain-core", then confirm the skill loads.

Cursor copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

gemini skills install

$ gemini skills install https://github.com/vechain/x-app-template.git --path .agents/skills/vechain-core

--scope user (default) or --scope workspace; --path is the subfolder of the repo that holds the skill; --consent skips the security confirmation prompt.

skills CLI

$ npx skills add vechain/x-app-template --skill vechain-core -a gemini-cli

Project install goes to .agents/skills/; add -g for ~/.gemini/skills/.

GitHub CLI

$ gh skill install vechain/x-app-template vechain-core --agent gemini-cli

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vechain/x-app-template.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/.agents/skills/vechain-core .gemini/skills/vechain-core && rm -rf skills-src

Use ~/.gemini/skills/ instead of .gemini/skills for a personal install, then run /skills reload.

Gemini CLI skills documentation · loads skills from .gemini/skills/, .agents/skills/

Paste into Gemini CLI

Install the "vechain-core" agent skill from https://github.com/vechain/x-app-template/tree/main/.agents/skills/vechain-core into .gemini/skills/vechain-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vechain-core", then confirm the skill loads.

Gemini CLI copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

GitHub CLI

$ gh skill install vechain/x-app-template vechain-core

Installs for Copilot at project scope by default; add --scope user for a personal install. Preview a skill first with gh skill preview. Needs GitHub CLI 2.90.0 or later (public preview).

skills CLI

$ npx skills add vechain/x-app-template --skill vechain-core -a github-copilot

Project install goes to .agents/skills/; add -g for ~/.copilot/skills/.

Manual copy

$ git clone --depth 1 https://github.com/vechain/x-app-template.git skills-src && mkdir -p .github/skills && cp -r skills-src/.agents/skills/vechain-core .github/skills/vechain-core && rm -rf skills-src

Use ~/.copilot/skills/ instead of .github/skills for a personal install. Commit .github/skills so cloud agent and code review can use it.

GitHub Copilot skills documentation · loads skills from .github/skills/, .claude/skills/, .agents/skills/

Paste into GitHub Copilot

Install the "vechain-core" agent skill from https://github.com/vechain/x-app-template/tree/main/.agents/skills/vechain-core into .github/skills/vechain-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vechain-core", then confirm the skill loads.

GitHub Copilot copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

skills CLI

$ npx skills add vechain/x-app-template --skill vechain-core -a opencode

OpenCode documents no install command of its own. Project install goes to .agents/skills/; add -g for ~/.config/opencode/skills/.

GitHub CLI

$ gh skill install vechain/x-app-template vechain-core --agent opencode

Project scope by default (.agents/skills/); add --scope user for a personal install.

Manual copy

$ git clone --depth 1 https://github.com/vechain/x-app-template.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/.agents/skills/vechain-core .opencode/skills/vechain-core && rm -rf skills-src

Use ~/.config/opencode/skills/ instead of .opencode/skills for a personal install.

OpenCode skills documentation · loads skills from .opencode/skills/, .claude/skills/, .agents/skills/

Paste into OpenCode

Install the "vechain-core" agent skill from https://github.com/vechain/x-app-template/tree/main/.agents/skills/vechain-core into .opencode/skills/vechain-core/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "vechain-core", then confirm the skill loads.

OpenCode copies the folder itself, the same result as the manual copy. Check what it changed before you commit it.

Facts

Skill name: vechain-core
GitHub stars: 450
Token cost: ~1.2k tokens
SKILL.md length: 555 words
Files: 5 (incl. references)
Skills in repo: 11
Repo updated: Jul 20, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Core VeChain development — SDK usage, fee delegation (VIP-191), multi-clause transactions, dual-token model, legacy migration, and general VeChainThor development patterns.

Works in 5 steps: Check Node version → Detect project structure → Clarify before implementing → …
Agent Workflows work in your project
SKILL.md covers CRITICAL RULES, Scope, Default stack and Operating procedure, plus 1 more section
Calls nvm

What it does

Vechain Core is an agent skill from vechain/x-app-template. Core VeChain development — SDK usage, fee delegation (VIP-191), multi-clause transactions, dual-token model, legacy migration, and general VeChainThor development patterns.

Its SKILL.md is about 1.2k tokens, which your agent loads only when the skill is triggered. The skill folder holds 5 other files, including reference files (for example `references/fee-delegation.md`, `references/multi-clause-transactions.md` and `references/resources.md`).

It sits in Agent Workflows. The repository describes itself as: Vechain VeBetterDAO X-App template. The licence is MIT.

When your agent uses it

Agent Workflows work in your project

Example prompts

“/vechain-core”

Workflow steps

5 steps, taken from the step headings in SKILL.md.

Check Node version
Detect project structure
Clarify before implementing
Implement with VeChain-specific correctness
Verify and deliver

What it can do on your machine

Read from SKILL.md and the folder at commit 8692b6a. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.
From allowed-tools in the SKILL.md frontmatter.
Runs code
Shell commands in SKILL.md call:
- nvm
From the folder's file list and the shell code blocks in SKILL.md.
Network
No URLs in SKILL.md.
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names no API keys, tokens, secrets or passwords.
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Vechain Core loads about 1.2k tokens when it runs, and up to ~9.9k if it reads all its reference files. Until then it costs about 46 tokens; SKILL.md has 555 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~46
When it runs · the whole SKILL.md, loaded when a task matches: ~1.2k
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~9.9k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from vechain/x-app-template at commit 8692b6a, republished under its MIT licence (© vechain). 555 words, ~1,210 tokens.

Download SKILL.mdSave it as .claude/skills/vechain-core/SKILL.md (or your agent's skills folder). This skill also uses 4 other files; get the full folder from GitHub.

name: vechain-core
description: Core VeChain development — SDK usage, fee delegation (VIP-191), multi-clause transactions, dual-token model, legacy migration, and general VeChainThor development patterns.
license: MIT
metadata.author: VeChain
metadata.version: 0.4.0

VeChain Core Skill

CRITICAL RULES

Read reference files FIRST. When the user's request involves any topic in the reference table below, read those files before doing anything else — before writing code, before making decisions. Briefly mention which files you are reading so the user can confirm the skill is active (e.g., "Reading fee delegation reference...").
Information priority for VeChain topics: (a) Reference files in this skill — always the primary source. (b) VeChain MCP tools — use @vechain/mcp-server for on-chain data, transaction building, and live network queries; use Kapa AI MCP for VeChain documentation lookups. (c) Web search — only as a last resort, and only for topics NOT covered in the reference files.
Prefer working directly in the main conversation for VeChain tasks. Plan mode and subagents do not inherit skill context and may fall back to web search instead of using reference files.
After compaction or context loss, re-read this SKILL.md to restore awareness of the reference table and operating procedure before continuing work.

Scope

Use this Skill for general VeChain development:

SDK usage (@vechain/sdk-core, @vechain/sdk-network, ethers adapter)
Fee delegation (VIP-191) — gasless transactions, backend sponsorship, vechain.energy
Multi-clause transactions — atomic batching of multiple operations
Dual-token model (VET for value, VTHO for gas)
Legacy migration from Connex/thor-devkit to VeChain SDK
General VeChainThor development patterns and reference links

For specialized topics, see the companion skills:

frontend — Generic frontend patterns: React Query, Turborepo, state management, Chakra UI, i18n, transaction UX
vechain-kit — VeChain Kit and dapp-kit packages: hooks, components, wallet connection, social login
smart-contract-development — Solidity, Hardhat, testing, security, gas optimization
vebetterdao — X2Earn apps, B3TR/VOT3, governance, VeVote
stargate — NFT staking, validators, delegation, VTHO rewards

Default stack

Layer	Default	Alternative
SDK	`@vechain/sdk-core` + `@vechain/sdk-network`	`@vechain/sdk-ethers-adapter`
Node	Node 20 LTS (managed via `nvm`)	--

Operating procedure

1. Check Node version

Before installing dependencies or running any command:

Check if .nvmrc exists in the project root. If yes, run nvm use to switch to the required version.
If .nvmrc does not exist, create one with 20 (Node 20 LTS) and run nvm use.

Show full SKILL.md (220 more words)Show less

2. Detect project structure

turbo.json present → follow Turborepo conventions (apps/, packages/*)

3. Clarify before implementing

When the user's request is ambiguous or could be solved multiple ways, ask before building. Do not silently research alternatives and pick one. Separate research from implementation:

If the scope is unclear, ask the user to narrow it
If multiple architectures are viable, present trade-offs and let the user choose
Only proceed to implementation once the approach is agreed upon

4. Implement with VeChain-specific correctness

Network: always explicit (mainnet/testnet/solo)
Gas: estimate first, use fee delegation where appropriate
Transactions: use multi-clause when batching benefits atomicity or UX
Tokens: VET for value, VTHO for gas (dual-token model)

5. Verify and deliver

A task is not complete until all applicable gates pass:

Code compiles — no build errors
Tests pass — existing tests still pass; new logic has test coverage
Risk notes documented — any signing, fee, or token-transfer implications are called out

Then provide:

Files changed + diffs
Install/build/test commands
Risk notes for signing, fees, token transfers

Reference files

Read the matching files BEFORE doing anything else. See Critical Rules above.

Topic	File	Read when user mentions...
Fee delegation	references/fee-delegation.md	gasless, sponsored, VIP-191, delegator, vechain.energy
Multi-clause	references/multi-clause-transactions.md	batch, multi-clause, atomic, multiple operations
Legacy migration	references/sdk-migration.md	Connex, thor-devkit, migration, deprecated
Reference links	references/resources.md	docs URL, npm link, GitHub repo

Files

SKILL.md and 4 other files (references) in .agents/skills/vechain-core of vechain/x-app-template.

SKILL.md
references/fee-delegation.md
references/multi-clause-transactions.md
references/resources.md
references/sdk-migration.md

Open the folder on GitHubat commit 8692b6a

Compare with similar skills

Vechain Core next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Vechain Core compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Vechain Core this skillvechain/x-app-template	450	—	~1.2k	Automated safety check: Pass	MIT	2 mo ago
MCP Server Builderanthropics/skills	180k	63 repos	~2.3k	Automated safety check: Pass	Apache-2.0	today
MCP Server BuildershareAI-lab/learn-claude-code	78k	5 repos	~1.2k	Automated safety check: Pass	MIT	11 days ago
Brainstormingxpinjection/test-driven-spring-boot	112	54 repos	~2.6k	Automated safety check: Pass	MIT	1 mo ago
MCP Integration for Pluginsanthropics/claude-plugins-official	38k	11 repos	~3.1k	Automated safety check: Pass	Apache-2.0	today
MCP Server Builder with mcp-usemcp-use/mcp-use	11k	—	~923	Automated safety check: Pass	Apache-2.0	today

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More from vechain/x-app-template

All 11 skills in this repo

Create Vechain Dapp
vechain/x-app-template
Scaffold a VeChain dApp with Next.js, VeChain Kit, Chakra UI v3, and GitHub Pages deployment.
450 GitHub stars~1.8k tokensUpdated 2 mo ago
Auto-check passed
Secure GitHub Actions
vechain/x-app-template
Secure GitHub Actions workflows against supply-chain, privilege, and shell-injection risks.
450 GitHub stars~1.2k tokensUpdated 2 mo ago
Auto-check passed
Translate
vechain/x-app-template
Manages translation files for react-i18next. An agent skill from vechain/x-app-template.
450 GitHub stars~1.2k tokensUpdated 2 mo ago
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Frontend
vechain/x-app-template
Generic frontend development patterns for VeChain dApps — React Query, Turborepo architecture, state management, Chakra UI, i18n, loading states, and transaction UX.
450 GitHub stars~1.1k tokensUpdated 2 mo ago
Auto-check passed
Smart Contract Development
vechain/x-app-template
Solidity smart contract development on VeChainThor — Hardhat setup, ERC-20/721 patterns, upgradeable contracts, gas optimization, testing with Thor Solo, security auditing, and ABI codegen.
450 GitHub stars~1.1k tokensUpdated 2 mo ago
Auto-check passed
Vebetterdao
vechain/x-app-template
VeBetterDAO and X2Earn app development — B3TR/VOT3 tokens, reward distribution, sustainability proofs, app submission, governance, VeVote, quadratic funding, B3MO Quests, and navigators.
450 GitHub stars~1.1k tokensUpdated 2 mo ago
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Questions about Vechain Core

What does Vechain Core do?

Core VeChain development — SDK usage, fee delegation (VIP-191), multi-clause transactions, dual-token model, legacy migration, and general VeChainThor development patterns. Vechain Core is an agent skill from vechain/x-app-template. Core VeChain development — SDK usage, fee delegation (VIP-191), multi-clause transactions, dual-token model, legacy migration, and general VeChainThor development patterns.

When should I use Vechain Core?

Vechain Core fits situations like: agent Workflows work in your project.

How do I install Vechain Core in Claude Code?

Run `npx skills add vechain/x-app-template --skill vechain-core -a claude-code`. Or copy the skill folder (.agents/skills/vechain-core in vechain/x-app-template) into .claude/skills/vechain-core in your project. Claude Code loads it when a task matches its description.

How do I install Vechain Core in Codex?

Run `npx skills add vechain/x-app-template --skill vechain-core -a codex`. Or copy the skill folder (.agents/skills/vechain-core in vechain/x-app-template) into .agents/skills/vechain-core in your project. Codex loads it when a task matches its description.

Can I use Vechain Core in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add vechain/x-app-template --skill vechain-core -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/vechain-core, .gemini/skills/vechain-core, .github/skills/vechain-core and .opencode/skills/vechain-core in your project.

What does Vechain Core need to run?

Going by SKILL.md and its folder, Vechain Core needs the command-line tools its instructions call (nvm).

Does Vechain Core access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Vechain Core safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Vechain Core use?

Vechain Core is published under the MIT licence (declared in SKILL.md). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Vechain Core use?

About 1.2k tokens (SKILL.md is roughly 4.8k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 8.7k tokens, read only when the agent opens those files.

What are the alternatives to Vechain Core?

Skills that share tags, products or a category with Vechain Core: MCP Server Builder (anthropics/skills, 180k stars), MCP Server Builder (shareAI-lab/learn-claude-code, 78k stars), Brainstorming (xpinjection/test-driven-spring-boot, 112 stars) and MCP Integration for Plugins (anthropics/claude-plugins-official, 38k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Vechain Core?

vechain (a GitHub organization) maintains it in vechain/x-app-template, which has 450 GitHub stars. The repository holds 11 skills in this directory. The repository was last updated on July 20, 2026.

Source: vechain/x-app-template on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Vechain Core

Facts

At a glance

What it does

When your agent uses it

Example prompts

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

VeChain Core Skill

CRITICAL RULES

Scope

Default stack

Operating procedure

1. Check Node version

2. Detect project structure

3. Clarify before implementing

4. Implement with VeChain-specific correctness

5. Verify and deliver

Reference files

Files

Compare with similar skills

Similar skills

More from vechain/x-app-template

Related

Questions about Vechain Core