Agent skill

Hex Encoding

Convert between bytes, strings, and hex in Nethereum. An agent skill from Nethereum/Nethereum.

Install Hex Encoding

skills CLI

$ npx skills add Nethereum/Nethereum --skill hex-encoding -a claude-code

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

GitHub CLI

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

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 hex-encoding -a codex

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

GitHub CLI

$ gh skill install Nethereum/Nethereum hex-encoding --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/hex-encoding .agents/skills/hex-encoding && 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 "hex-encoding" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/hex-encoding into .agents/skills/hex-encoding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hex-encoding", 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 hex-encoding -a cursor

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

GitHub CLI

$ gh skill install Nethereum/Nethereum hex-encoding --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/hex-encoding .cursor/skills/hex-encoding && 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 "hex-encoding" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/hex-encoding into .cursor/skills/hex-encoding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hex-encoding", 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/hex-encoding

--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 hex-encoding -a gemini-cli

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

GitHub CLI

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

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 hex-encoding -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/hex-encoding .github/skills/hex-encoding && 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 "hex-encoding" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/hex-encoding into .github/skills/hex-encoding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hex-encoding", 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 hex-encoding -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 hex-encoding --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/hex-encoding .opencode/skills/hex-encoding && 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 "hex-encoding" agent skill from https://github.com/Nethereum/Nethereum/tree/master/plugins/nethereum-skills/skills/hex-encoding into .opencode/skills/hex-encoding/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "hex-encoding", 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: hex-encoding
GitHub stars: 2.3k
Token cost: ~525 tokens
SKILL.md length: 42 words
Files: 1
Skills in repo: 71
Repo updated: Oct 5, 2026
First seen: Oct 7, 2026
Licence: MIT

At a glance

Convert between bytes, strings, and hex in Nethereum. An agent skill from Nethereum/Nethereum.

The user needs hex conversion
SKILL.md covers Bytes to hex, Hex to bytes, Prefix handling and Hex comparison…, plus 3 more sections
Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md
Byte array to hex

What it does

Hex Encoding is an agent skill from Nethereum/Nethereum. Convert between bytes, strings, and hex in Nethereum. Use when the user needs hex conversion, byte array to hex, hex to bytes, HexBigInteger, hex prefix handling, or UTF-8 hex encoding.

Its SKILL.md is about 530 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 Backend & APIs. The repository describes itself as: Ethereum .Net cross platform integration library. The licence is MIT.

When your agent uses it

The user needs hex conversion
Byte array to hex
Hex prefix handling
UTF-8 hex encoding

Example prompts

“/hex-encoding”

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
No scripts in the folder and no shell commands in SKILL.md (its code samples are csharp).
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

Hex Encoding loads about 525 tokens when it runs. Until then it costs about 50 tokens; SKILL.md has 42 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~50
When it runs · the whole SKILL.md, loaded when a task matches: ~525

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). 42 words, ~525 tokens.

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

name: hex-encoding
description: Convert between bytes, strings, and hex in Nethereum. Use when the user needs hex conversion, byte array to hex, hex to bytes, HexBigInteger, hex prefix handling, or UTF-8 hex encoding.
user-invocable: true

Hex Encoding with Nethereum

NuGet: Nethereum.Hex (included in Nethereum.Web3)

Bytes to hex

csharp

var data = new byte[] { 0xDE, 0xAD, 0xBE, 0xEF };

var hexWithPrefix = data.ToHex(prefix: true);    // "0xdeadbeef"
var hexWithoutPrefix = data.ToHex(prefix: false); // "deadbeef"

Source: HexConversionDocExampleTests.ShouldConvertBytesToHex

Hex to bytes

csharp

var hex = "0xdeadbeef";
var bytes = hex.HexToByteArray();
// { 0xDE, 0xAD, 0xBE, 0xEF }

Source: HexConversionDocExampleTests.ShouldConvertHexToBytes

Prefix handling

csharp

// Ensure prefix is present (idempotent)
"deadbeef".EnsureHexPrefix();   // "0xdeadbeef"
"0xdeadbeef".EnsureHexPrefix(); // "0xdeadbeef"

// Check prefix
"0xdeadbeef".HasHexPrefix(); // true

// Remove prefix
"0xdeadbeef".RemoveHexPrefix(); // "deadbeef"

Source: HexConversionDocExampleTests.ShouldEnsureHexPrefix, ShouldCheckAndRemoveHexPrefix

Hex comparison (case-insensitive)

csharp

var hex1 = "0xDeAdBeEf";
var hex2 = "0xdeadbeef";

hex1.IsTheSameHex(hex2); // true

Source: HexConversionDocExampleTests.ShouldCompareHexStrings

HexBigInteger for gas and value

csharp

var fromNumber = new HexBigInteger(new BigInteger(1_000_000));
var fromHex = new HexBigInteger("0xf4240");

fromNumber.Value;    // BigInteger 1000000
fromNumber.HexValue; // "0xf4240"
fromHex.Value;       // BigInteger 1000000

Source: HexConversionDocExampleTests.ShouldCreateHexBigIntegerFromBothFormats

UTF-8 encoding

csharp

var text = "Hello Ethereum";
var hex = text.ToHexUTF8();
var decoded = hex.HexToUTF8String();
// decoded == "Hello Ethereum"

Source: HexConversionDocExampleTests.ShouldEncodeDecodeUtf8AsHex

Required usings

csharp

using Nethereum.Hex.HexConvertors.Extensions;
using Nethereum.Hex.HexTypes;
using System.Numerics;

Files

Just SKILL.md in plugins/nethereum-skills/skills/hex-encoding of Nethereum/Nethereum.

Open the folder on GitHubat commit 229f278

Compare with similar skills

Hex Encoding 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.

Hex Encoding compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Hex Encoding this skillNethereum/Nethereum	2.3k	—	~525	Automated safety check: Pass	MIT	2 days ago
Configuring Horizoncoollabsio/coolify	63k	4 repos	~898	Automated safety check: Pass	MIT	today
Nestjs Best Practicesrolling-scopes/rsschool-app	10k	6 repos	~1.2k	Automated safety check: Pass	MIT	3 days ago
Sub2API AdminWei-Shaw/sub2api	43k	1 repos	~717	Automated safety check: Pass	LGPL-3.0	today
Firecrawl Build Onboardingfirecrawl/firecrawl	189k	1 repos	~1.4k	Automated safety check: Notes	ISC	today
Obsidian BasesAtmosphere/atmosphere	3.8k	22 repos	~3.2k	Automated safety check: Pass	Apache-2.0	yesterday

Similar skills

Configuring Horizon
coollabsio/coolify
A skill your agent uses whenever the user mentions Horizon by name in a Laravel context.
63k GitHub starsUsed in 4 repos~898 tokens
Backend & APIsAuto-check passed
Nestjs Best Practices
rolling-scopes/rsschool-app
NestJS best practices and architecture patterns for building production-ready applications.
10k GitHub starsUsed in 6 repos~1.2k tokens
Backend & APIsAuto-check passed
Sub2API Admin
Wei-Shaw/sub2api
Manages a Sub2API deployment from the command line: accounts, redeem and invitation codes, groups, proxies, imports, exports and raw admin API calls.
43k GitHub starsUsed in 1 repo~717 tokens
Backend & APIsAuto-check passed
Firecrawl Build Onboarding
firecrawl/firecrawl
Gets Firecrawl working in a project: signs you in through the browser, saves FIRECRAWL_API_KEY to .env and picks the first SDK or REST path.
189k GitHub starsUsed in 1 repo~1.4k tokens
Backend & APIsAuto-check: notes
Obsidian Bases
Atmosphere/atmosphere
Create and edit Obsidian Bases (.base files) with views, filters, formulas, and summaries.
3.8k GitHub starsUsed in 22 repos~3.2k tokens
Backend & APIsAuto-check passed
Fortify Development
coollabsio/coolify
ACTIVATE when the user works on authentication in Laravel. An agent skill from coollabsio/coolify.
63k GitHub starsUsed in 4 repos~1.9k tokens
Backend & APIsAuto-check passed

More from Nethereum/Nethereum

All 71 skills in this repo

Aa Batching Paymasters
Nethereum/Nethereum
Help users batch multiple calls into a single UserOperation and sponsor gas with paymasters using Nethereum Account Abstraction.
2.3k GitHub stars~1.5k tokensUpdated 2 days ago
Auto-check passed
Aa Bundler
Nethereum/Nethereum
Help users run an ERC-4337 bundler using Nethereum — set up in-process or standalone bundlers with mempool, validation, reputation, and JSON-RPC server.
2.3k GitHub stars~1.2k tokensUpdated 2 days ago
Auto-check passed
Abi Encoding
Nethereum/Nethereum
Encode and decode Ethereum ABI data with Nethereum. An agent skill from Nethereum/Nethereum.
2.3k GitHub stars~1.3k tokensUpdated 2 days ago
Auto-check passed
Abi Retrieval
Nethereum/Nethereum
Fetch contract ABIs from Sourcify, Etherscan, and 4Byte Directory using the composite ABIInfoStorage pattern (.NET/C).
2.3k GitHub stars~1.5k tokensUpdated 2 days ago
Auto-check passed
Account Abstraction
Nethereum/Nethereum
Help users implement ERC-4337 Account Abstraction with Nethereum — send UserOperations, use smart accounts, route contract calls through a bundler, enable gasless transactions, or work with AA in…
2.3k GitHub stars~1.7k tokensUpdated 2 days ago
Auto-check passed
Address Utils
Nethereum/Nethereum
Validate and format Ethereum addresses with Nethereum. An agent skill from Nethereum/Nethereum.
2.3k GitHub stars~1.2k tokensUpdated 2 days ago
Auto-check passed

Questions about Hex Encoding

What does Hex Encoding do?

Convert between bytes, strings, and hex in Nethereum. An agent skill from Nethereum/Nethereum. Hex Encoding is an agent skill from Nethereum/Nethereum. Convert between bytes, strings, and hex in Nethereum.

When should I use Hex Encoding?

Hex Encoding fits situations like: the user needs hex conversion; byte array to hex; hex prefix handling; UTF-8 hex encoding.

How do I install Hex Encoding in Claude Code?

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

How do I install Hex Encoding in Codex?

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

Can I use Hex Encoding 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 hex-encoding -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/hex-encoding, .gemini/skills/hex-encoding, .github/skills/hex-encoding and .opencode/skills/hex-encoding in your project.

What does Hex Encoding need to run?

SKILL.md names no scripts, command-line tools or credentials: Hex Encoding is instructions for the agent only.

Does Hex Encoding 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 Hex Encoding 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 Hex Encoding use?

Hex Encoding 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 Hex Encoding use?

About 525 tokens (SKILL.md is roughly 2.1k 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 Hex Encoding?

Skills that share tags, products or a category with Hex Encoding: Configuring Horizon (coollabsio/coolify, 63k stars), Nestjs Best Practices (rolling-scopes/rsschool-app, 10k stars), Sub2API Admin (Wei-Shaw/sub2api, 43k stars) and Firecrawl Build Onboarding (firecrawl/firecrawl, 189k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Hex Encoding?

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 Hex Encoding

Facts

At a glance

What it does

When your agent uses it

Example prompts

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Context cost

Safety

SKILL.md

Hex Encoding with Nethereum

Bytes to hex

Hex to bytes

Prefix handling

Hex comparison (case-insensitive)

HexBigInteger for gas and value

UTF-8 encoding

Required usings

Files

Compare with similar skills

Similar skills

More from Nethereum/Nethereum

Related

Questions about Hex Encoding