Agent skill

Aspire Devchain

Help users create and run a local Ethereum development environment with .NET Aspire — DevChain node, blockchain indexer, Blazor explorer, and PostgreSQL.

MITAuto-check passedDatabases

Install Aspire Devchain

skills CLI

$ npx skills add Nethereum/Nethereum --skill aspire-devchain -a claude-code

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

GitHub CLI

$ gh skill install Nethereum/Nethereum aspire-devchain --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/Nethereum/Nethereum.git skills-src && mkdir -p .claude/skills && cp -r skills-src/plugins/nethereum-skills/skills/aspire-devchain .claude/skills/aspire-devchain && 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 "aspire-devchain" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/aspire-devchain into .claude/skills/aspire-devchain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aspire-devchain", 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/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/aspire-devchain

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 Nethereum/Nethereum --skill aspire-devchain -a codex

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

GitHub CLI

$ gh skill install Nethereum/Nethereum aspire-devchain --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/Nethereum/Nethereum.git skills-src && mkdir -p .agents/skills && cp -r skills-src/plugins/nethereum-skills/skills/aspire-devchain .agents/skills/aspire-devchain && 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 "aspire-devchain" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/aspire-devchain into .agents/skills/aspire-devchain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aspire-devchain", 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 Nethereum/Nethereum --skill aspire-devchain -a cursor

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

GitHub CLI

$ gh skill install Nethereum/Nethereum aspire-devchain --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/Nethereum/Nethereum.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/plugins/nethereum-skills/skills/aspire-devchain .cursor/skills/aspire-devchain && 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 "aspire-devchain" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/aspire-devchain into .cursor/skills/aspire-devchain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aspire-devchain", 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/Nethereum/Nethereum.git --path plugins/nethereum-skills/skills/aspire-devchain

--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 Nethereum/Nethereum --skill aspire-devchain -a gemini-cli

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

GitHub CLI

$ gh skill install Nethereum/Nethereum aspire-devchain --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/Nethereum/Nethereum.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/plugins/nethereum-skills/skills/aspire-devchain .gemini/skills/aspire-devchain && 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 "aspire-devchain" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/aspire-devchain into .gemini/skills/aspire-devchain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aspire-devchain", 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 Nethereum/Nethereum aspire-devchain

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 Nethereum/Nethereum --skill aspire-devchain -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/Nethereum/Nethereum.git skills-src && mkdir -p .github/skills && cp -r skills-src/plugins/nethereum-skills/skills/aspire-devchain .github/skills/aspire-devchain && 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 "aspire-devchain" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/aspire-devchain into .github/skills/aspire-devchain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aspire-devchain", 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 Nethereum/Nethereum --skill aspire-devchain -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 Nethereum/Nethereum aspire-devchain --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/Nethereum/Nethereum.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/plugins/nethereum-skills/skills/aspire-devchain .opencode/skills/aspire-devchain && 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 "aspire-devchain" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/aspire-devchain into .opencode/skills/aspire-devchain/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "aspire-devchain", 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: aspire-devchain
GitHub stars: 2.3k
Token cost: ~1k tokens
SKILL.md length: 248 words
Files: 1
Skills in repo: 71
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Help users create and run a local Ethereum development environment with .NET Aspire — DevChain node, blockchain indexer, Blazor explorer, and PostgreSQL.

The user mentions Aspire DevChain template
SKILL.md covers When to Use This, Install & Create, Template Parameters and What's Included, plus 6 more sections
Calls dotnet and docker
Nethereum-devchain

What it does

Aspire Devchain is an agent skill from Nethereum/Nethereum. Help users create and run a local Ethereum development environment with .NET Aspire — DevChain node, blockchain indexer, Blazor explorer, and PostgreSQL. Use this skill when the user mentions Aspire DevChain template, nethereum-devchain, creating a local blockchain environment with Aspire, setting up DevChain with an explorer and indexer, or wants a single-command Ethereum dev environment with .NET. Also trigger when users mention dotnet new nethereum-devchain or Nethereum.Aspire.TemplatePack.

Its SKILL.md is about 1k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It sits in Databases. It works with .NET, Ethereum, PostgreSQL and Blazor. The repository describes itself as: Ethereum .Net cross platform integration library. The licence is MIT.

When your agent uses it

The user mentions Aspire DevChain template
Nethereum-devchain
Creating a local blockchain environment with Aspire
Setting up DevChain with an explorer and indexer

Example prompts

“/aspire-devchain”

Requirements

Docker

What it can do on your machine

Read from SKILL.md and the folder at commit 229f278. 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:
- dotnet
- docker
From the folder's file list and the shell code blocks in SKILL.md.
Network
Links to these hosts (documentation or services it may open):
- docs.nethereum.com
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

Aspire Devchain loads about 1k tokens when it runs. Until then it costs about 129 tokens; SKILL.md has 248 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~129
When it runs · the whole SKILL.md, loaded when a task matches: ~1k

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 Nethereum/Nethereum at commit 229f278, republished under its MIT licence (© Nethereum). 248 words, ~1,017 tokens.

Download SKILL.mdSave it as .claude/skills/aspire-devchain/SKILL.md (or your agent's skills folder).

name: aspire-devchain
description: Help users create and run a local Ethereum development environment with .NET Aspire — DevChain node, blockchain indexer, Blazor explorer, and PostgreSQL. Use this skill when the user mentions Aspire DevChain template, nethereum-devchain, creating a local blockchain environment with Aspire, setting up DevChain with an explorer and indexer, or wants a single-command Ethereum dev environment with .NET. Also trigger when users mention dotnet new nethereum-devchain or Nethereum.Aspire.TemplatePack.
user-invocable: true

Nethereum DevChain Aspire Template

The nethereum-devchain template creates a complete local Ethereum development environment orchestrated by .NET Aspire — a DevChain node, blockchain indexer, Blazor explorer, and PostgreSQL database, all wired together with service discovery, telemetry, and health checks.

When to Use This

Setting up a local Ethereum development environment quickly
Need a blockchain explorer for local development
Want an indexed local chain (blocks, transactions, token transfers in PostgreSQL)
Replacing Docker Compose setups for Ethereum dev infrastructure
Setting up infrastructure before building a dApp (see aspire-dapp for full-stack)

Install & Create

bash

# Install the template pack (once)
dotnet new install Nethereum.Aspire.TemplatePack

# Create a project
dotnet new nethereum-devchain -n MyChain
cd MyChain

# Set the dev account private key
cd AppHost
dotnet user-secrets set "Parameters:devAccountPrivateKey" "5de4111afa1a4b94908f83103eb1f1706367c2e68ca870fc3fb9a804cdab365a"
cd ..

# Run
dotnet run --project AppHost

The Aspire dashboard opens at https://localhost:17178 with all services visible.

Template Parameters

bash

dotnet new nethereum-devchain -n MyChain \
    --NethereumVersion 6.1.0 \
    --ChainId 42069 \
    --AspireVersion 13.1.1

Parameter	Default	Description
`--NethereumVersion`	`6.1.0`	Nethereum NuGet package version
`--ChainId`	`31337`	Chain ID for the DevChain
`--AspireVersion`	`13.1.1`	.NET Aspire SDK version

What's Included

Service	Description
DevChain	In-memory Ethereum node (EIP-1559, debug tracing, pre-funded accounts)
Indexer	Indexes blocks, transactions, token transfers (ERC-20/721/1155), MUD records into PostgreSQL
Explorer	Blazor blockchain explorer with contract interaction, ABI decoding, wallet connection
PostgreSQL	Managed Docker container for all indexed data

Project Structure

MyChain/
├── AppHost/          Aspire orchestrator
├── DevChain/         Ethereum node
├── Indexer/          Block indexer → PostgreSQL
├── Explorer/         Blazor blockchain explorer
└── ServiceDefaults/  Shared Aspire config

Prerequisites

.NET 10 SDK or later
Docker Desktop (for PostgreSQL)

Configuration

DevChain Storage

json

{
  "DevChain": {
    "ChainId": 31337,
    "Storage": "sqlite",
    "AutoMine": true
  }
}

Set "Storage": "memory" for ephemeral chains that reset on restart.

Connect Tools

csharp

// Nethereum
var web3 = new Web3("http://localhost:<port>");
var balance = await web3.Eth.GetBalance.SendRequestAsync("0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266");

bash

# Foundry
cast balance 0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266 --rpc-url http://localhost:<port>

Troubleshooting

PostgreSQL unhealthy: docker volume rm nethereum-pgdata then restart
Port conflicts: Aspire assigns dynamic ports — check the dashboard

devchain — DevChain library details (configuration, forking, RPC methods, testing patterns)
aspire-dapp — Full-stack dApp template (adds WebApp, Solidity contracts, wallet integration)
blockchain-explorer — Explorer features in depth
blockchain-indexing — Indexer configuration and customisation

For full documentation, see: https://docs.nethereum.com/docs/aspire-templates/guide-devchain-template

Files

Just SKILL.md in plugins/nethereum-skills/skills/aspire-devchain of Nethereum/Nethereum.

Open the folder on GitHubat commit 229f278

Compare with similar skills

Aspire Devchain 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.

Aspire Devchain compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Aspire Devchain this skillNethereum/Nethereum	2.3k	—	~1k	Automated safety check: Pass	MIT	2 days ago
How To Communicatedatabasus/databasus	8.8k	—	~3.9k	Automated safety check: Pass	MIT	15 days ago
SQL Database Support for pRESTprest/prest	4.6k	—	~1.6k	Automated safety check: Pass	MIT	today
Rhctlsaidake/rhctl	106	—	~4k	Automated safety check: Notes	Apache-2.0	yesterday
Cognee Database Migrationstopoteretes/cognee	32k	—	~2.6k	Automated safety check: Notes	Apache-2.0	today
Local Platform E2Ecomputesdk/benchmarks	126	—	~3k	Automated safety check: Notes	MIT	today

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Works with

Questions about Aspire Devchain

What does Aspire Devchain do?

Help users create and run a local Ethereum development environment with .NET Aspire — DevChain node, blockchain indexer, Blazor explorer, and PostgreSQL. Aspire Devchain is an agent skill from Nethereum/Nethereum.NET Aspire — DevChain node, blockchain indexer, Blazor explorer, and PostgreSQL.

When should I use Aspire Devchain?

Aspire Devchain fits situations like: the user mentions Aspire DevChain template; nethereum-devchain; creating a local blockchain environment with Aspire; setting up DevChain with an explorer and indexer.

How do I install Aspire Devchain in Claude Code?

Run `npx skills add Nethereum/Nethereum --skill aspire-devchain -a claude-code`. Or copy the skill folder (plugins/nethereum-skills/skills/aspire-devchain in Nethereum/Nethereum) into .claude/skills/aspire-devchain in your project. Claude Code loads it when a task matches its description.

How do I install Aspire Devchain in Codex?

Run `npx skills add Nethereum/Nethereum --skill aspire-devchain -a codex`. Or copy the skill folder (plugins/nethereum-skills/skills/aspire-devchain in Nethereum/Nethereum) into .agents/skills/aspire-devchain in your project. Codex loads it when a task matches its description.

Can I use Aspire Devchain 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 Nethereum/Nethereum --skill aspire-devchain -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/aspire-devchain, .gemini/skills/aspire-devchain, .github/skills/aspire-devchain and .opencode/skills/aspire-devchain in your project.

What does Aspire Devchain need to run?

Going by SKILL.md and its folder, Aspire Devchain needs the command-line tools its instructions call (dotnet and docker). Our summary lists: Docker.

Does Aspire Devchain access the network?

SKILL.md names 1 domain. As links in the text: docs.nethereum.com. This is read from the text; nothing was executed.

Is Aspire Devchain 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 Aspire Devchain use?

Aspire Devchain is published under the MIT licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Aspire Devchain use?

About 1k tokens (SKILL.md is roughly 4.1k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Aspire Devchain?

Skills that share tags, products or a category with Aspire Devchain: How To Communicate (databasus/databasus, 8.8k stars), SQL Database Support for pREST (prest/prest, 4.6k stars), Rhctl (saidake/rhctl, 106 stars) and Cognee Database Migrations (topoteretes/cognee, 32k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Aspire Devchain?

Nethereum (a GitHub organization) maintains it in Nethereum/Nethereum, which has 2,260 GitHub stars. The repository holds 71 skills in this directory. The repository was last updated on October 5, 2026.

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

Install Aspire Devchain

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Nethereum DevChain Aspire Template

When to Use This

Install & Create

Template Parameters

What's Included

Project Structure

Prerequisites

Configuration

DevChain Storage

Connect Tools

Troubleshooting

Related Skills

Files

Compare with similar skills

Similar skills

More from Nethereum/Nethereum

Related

Questions about Aspire Devchain