Agent skill

Clade Hello World

by jeremylongshore in jeremylongshore/tons-of-skills-marketplace

Send your first message to Claude using the Anthropic SDK. An agent skill from jeremylongshore/tons-of-skills-marketplace.

MITAuto-check passedAI & LLM Engineering

Install Clade Hello World

skills CLI

$ npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a claude-code

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

GitHub CLI

$ gh skill install jeremylongshore/tons-of-skills-marketplace clade-hello-world --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/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills/.curated/clade-hello-world .claude/skills/clade-hello-world && 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 "clade-hello-world" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/clade-hello-world into .claude/skills/clade-hello-world/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clade-hello-world", 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/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/clade-hello-world

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 jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a codex

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

GitHub CLI

$ gh skill install jeremylongshore/tons-of-skills-marketplace clade-hello-world --agent codex

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

Manual copy

$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .agents/skills && cp -r skills-src/skills/.curated/clade-hello-world .agents/skills/clade-hello-world && 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 "clade-hello-world" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/clade-hello-world into .agents/skills/clade-hello-world/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clade-hello-world", 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 jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a cursor

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

GitHub CLI

$ gh skill install jeremylongshore/tons-of-skills-marketplace clade-hello-world --agent cursor

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

Manual copy

$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .cursor/skills && cp -r skills-src/skills/.curated/clade-hello-world .cursor/skills/clade-hello-world && 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 "clade-hello-world" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/clade-hello-world into .cursor/skills/clade-hello-world/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clade-hello-world", 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/jeremylongshore/tons-of-skills-marketplace.git --path skills/.curated/clade-hello-world

--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 jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a gemini-cli

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

GitHub CLI

$ gh skill install jeremylongshore/tons-of-skills-marketplace clade-hello-world --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/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .gemini/skills && cp -r skills-src/skills/.curated/clade-hello-world .gemini/skills/clade-hello-world && 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 "clade-hello-world" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/clade-hello-world into .gemini/skills/clade-hello-world/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clade-hello-world", 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 jeremylongshore/tons-of-skills-marketplace clade-hello-world

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 jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a github-copilot

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

Manual copy

$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .github/skills && cp -r skills-src/skills/.curated/clade-hello-world .github/skills/clade-hello-world && 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 "clade-hello-world" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/clade-hello-world into .github/skills/clade-hello-world/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clade-hello-world", 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 jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -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 jeremylongshore/tons-of-skills-marketplace clade-hello-world --agent opencode

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

Manual copy

$ git clone --depth 1 https://github.com/jeremylongshore/tons-of-skills-marketplace.git skills-src && mkdir -p .opencode/skills && cp -r skills-src/skills/.curated/clade-hello-world .opencode/skills/clade-hello-world && 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 "clade-hello-world" agent skill from https://github.com/jeremylongshore/tons-of-skills-marketplace/tree/main/skills/.curated/clade-hello-world into .opencode/skills/clade-hello-world/ in this project. Copy the whole folder (SKILL.md and every file beside it), keep the folder name "clade-hello-world", 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: clade-hello-world
GitHub stars: 2.8k
Token cost: ~873 tokens
SKILL.md length: 160 words
Files: 2 (incl. references)
Skills in repo: 3,342
Repo updated: Oct 10, 2026
First seen: Oct 8, 2026
Licence: MIT

At a glance

Send your first message to Claude using the Anthropic SDK. An agent skill from jeremylongshore/tons-of-skills-marketplace.

Works in 3 steps: Basic Message → Add a System Prompt → Multi-Turn Conversation
Starting a new Claude integration
SKILL.md covers Overview, Prerequisites, Instructions and Python Example, plus 6 more sections
Needs ANTHROPIC_API_KEY

What it does

Clade Hello World is an agent skill from jeremylongshore/tons-of-skills-marketplace. Send your first message to Claude using the Anthropic SDK. Use when starting a new Claude integration, testing your setup, or learning the Messages API basics. Trigger with phrases like "anthropic hello world", "claude api example", "first claude call", "anthropic quick start".

Its SKILL.md is about 870 tokens, which your agent loads only when the skill is triggered. The skill folder holds 2 other files, including reference files (for example `references/one-pager.md`). Compatibility notes: Designed for Claude Code

It sits in AI & LLM Engineering, covering LLM API integration and Integration testing. It works with Anthropic API. The repository describes itself as: Model-agnostic agent-skills platform with a harness-free canonical layer, verified adapters, and the ccpi package manager. Explore at tonsofskills.com. The licence is MIT.

When your agent uses it

Starting a new Claude integration
Testing your setup
Learning the Messages API basics
With phrases like anthropic hello world

Example prompts

“anthropic hello world”
“claude api example”
“first claude call”
“/clade-hello-world”

Requirements

Python 3
A credential in ANTHROPIC_API_KEY
Compatibility (from SKILL.md): Designed for Claude Code
Pre-approved tools (allowed-tools): Read, Write, Edit

Workflow steps

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

Basic Message
Add a System Prompt
Multi-Turn Conversation

What it can do on your machine

Read from SKILL.md and the folder at commit cfae287. It shows what the files ask for, not the result of running them.

Tool permissions
Pre-approves these tools, so the agent can use them without asking each time:
- Read
- Write
- Edit
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 typescript and python).
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):
- platform.claude.com
From URLs in SKILL.md, links to its own repository left out.
Credentials
Names these keys or tokens, usually read from environment variables:
- ANTHROPIC_API_KEY
From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.
Compatibility
Designed for Claude Code
From compatibility in the SKILL.md frontmatter.

Context cost

Clade Hello World loads about 873 tokens when it runs, and up to ~1.3k if it reads all its reference files. Until then it costs about 74 tokens; SKILL.md has 160 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it: ~74
When it runs · the whole SKILL.md, loaded when a task matches: ~873
With references · SKILL.md plus every file in references/, read only if the agent opens them: ~1.3k

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 jeremylongshore/tons-of-skills-marketplace at commit cfae287, republished under its MIT licence (© jeremylongshore). 160 words, ~873 tokens.

Download SKILL.mdSave it as .claude/skills/clade-hello-world/SKILL.md (or your agent's skills folder). This skill also uses 1 other file; get the full folder from GitHub.

name: clade-hello-world
description: Send your first message to Claude using the Anthropic SDK. Use when starting a new Claude integration, testing your setup, or learning the Messages API basics. Trigger with phrases like "anthropic hello world", "claude api example", "first claude call", "anthropic quick start".
allowed-tools: Read, Write, Edit
compatibility: Designed for Claude Code
version: 1.1.0
license: MIT
author: Jeremy Longshore <jeremy@intentsolutions.io>
tags: saas, anthropic, claude, messages-api

Anthropic Hello World

Overview

Send your first message to Claude and get a response using the Messages API.

Prerequisites

Completed clade-install-auth setup
ANTHROPIC_API_KEY environment variable set

Instructions

Step 1: Basic Message

typescript

import Anthropic from '@claude-ai/sdk';

const client = new Anthropic();

const message = await client.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 1024,
  messages: [
    { role: 'user', content: 'What is the capital of France?' }
  ],
});

console.log(message.content[0].text);
// "The capital of France is Paris."

Step 2: Add a System Prompt

typescript

const message = await client.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 1024,
  system: 'You are a helpful geography expert. Be concise.',
  messages: [
    { role: 'user', content: 'What is the capital of France?' }
  ],
});

Step 3: Multi-Turn Conversation

typescript

const message = await client.messages.create({
  model: 'claude-sonnet-4-20250514',
  max_tokens: 1024,
  messages: [
    { role: 'user', content: 'What is the capital of France?' },
    { role: 'assistant', content: 'The capital of France is Paris.' },
    { role: 'user', content: 'What is its population?' },
  ],
});

Python Example

python

import anthropic

client = anthropic.Anthropic()

message = client.messages.create(
    model="claude-sonnet-4-20250514",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "What is the capital of France?"}
    ],
)
print(message.content[0].text)

Output

message.content[0].text — Claude's text response
message.model — model ID used
message.usage.input_tokens / message.usage.output_tokens — token counts
message.stop_reason — end_turn, max_tokens, or tool_use

Error Handling

Error	Cause	Solution
`authentication_error`	Bad API key	Check `ANTHROPIC_API_KEY`
`invalid_request_error`	Missing required field	Both `messages` and `max_tokens` are required
`not_found_error`	Invalid model ID	Use a valid model like `claude-sonnet-4-20250514`

Available Models

Model	Best For	Context	Cost (input/output per MTok)
`claude-opus-4-20250514`	Complex reasoning	200K	$15 / $75
`claude-sonnet-4-20250514`	Balanced quality + speed	200K	$3 / $15
`claude-haiku-4-5-20251001`	Fast, cheap tasks	200K	$0.80 / $4

Examples

See Step 1 (basic message), Step 2 (system prompt), and Step 3 (multi-turn) above. Python example included in its own section.

Resources

Next Steps

Proceed to clade-model-inference for streaming and advanced patterns.

Files

SKILL.md and 1 other file (references) in skills/.curated/clade-hello-world of jeremylongshore/tons-of-skills-marketplace.

SKILL.md
references/one-pager.md

Open the folder on GitHubat commit cfae287

Compare with similar skills

Clade Hello World 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.

Clade Hello World compared with similar skills
Skill	Stars	Used in	Tokens	Auto-check	Licence	Repo updated
Clade Hello World this skilljeremylongshore/tons-of-skills-marketplace	2.8k	—	~873	Automated safety check: Pass	MIT	yesterday
Claude APIterrense/LilBot-agent	121	—	~155	Automated safety check: Pass	None	3 mo ago
Claude API In Prototypesasgeirtj/system_prompts_leaks	69k	—	~281	Automated safety check: Pass	CC0-1.0	yesterday
Claude APIkid-sid/claude-spellbook	190	—	~2.7k	Automated safety check: Pass	MIT	2 mo ago
Claude API Helpergrandamenium/cortextos	101	—	~467	Automated safety check: Pass	MIT	18 days ago
Claude Cookbooks Reference2025Emma/vibe-coding-cn	23k	1 repos	~2.2k	Automated safety check: Pass	MIT	9 mo ago

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Questions about Clade Hello World

What does Clade Hello World do?

Send your first message to Claude using the Anthropic SDK. An agent skill from jeremylongshore/tons-of-skills-marketplace. Clade Hello World is an agent skill from jeremylongshore/tons-of-skills-marketplace. Send your first message to Claude using the Anthropic SDK.

When should I use Clade Hello World?

Clade Hello World fits situations like: starting a new Claude integration; testing your setup; learning the Messages API basics; with phrases like anthropic hello world.

How do I install Clade Hello World in Claude Code?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a claude-code`. Or copy the skill folder (skills/.curated/clade-hello-world in jeremylongshore/tons-of-skills-marketplace) into .claude/skills/clade-hello-world in your project. Claude Code loads it when a task matches its description.

How do I install Clade Hello World in Codex?

Run `npx skills add jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a codex`. Or copy the skill folder (skills/.curated/clade-hello-world in jeremylongshore/tons-of-skills-marketplace) into .agents/skills/clade-hello-world in your project. Codex loads it when a task matches its description.

Can I use Clade Hello World 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 jeremylongshore/tons-of-skills-marketplace --skill clade-hello-world -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/clade-hello-world, .gemini/skills/clade-hello-world, .github/skills/clade-hello-world and .opencode/skills/clade-hello-world in your project.

What does Clade Hello World need to run?

Going by SKILL.md and its folder, Clade Hello World needs credentials named ANTHROPIC_API_KEY. Our summary lists: Python 3; A credential in ANTHROPIC_API_KEY. Its frontmatter pre-approves these tools: Read, Write, Edit. Compatibility (from SKILL.md): Designed for Claude Code.

Does Clade Hello World access the network?

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

Is Clade Hello World 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 Clade Hello World use?

Clade Hello World 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 Clade Hello World use?

About 873 tokens (SKILL.md is roughly 3.5k 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 411 tokens, read only when the agent opens those files.

What are the alternatives to Clade Hello World?

Skills that share tags, products or a category with Clade Hello World: Claude API (terrense/LilBot-agent, 121 stars), Claude API In Prototypes (asgeirtj/system_prompts_leaks, 69k stars), Claude API (kid-sid/claude-spellbook, 190 stars) and Claude API Helper (grandamenium/cortextos, 101 stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Clade Hello World?

jeremylongshore (a GitHub user) maintains it in jeremylongshore/tons-of-skills-marketplace, which has 2,827 GitHub stars. The repository holds 3,342 skills in this directory. The repository was last updated on October 10, 2026.

Source: jeremylongshore/tons-of-skills-marketplace on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.

Install Clade Hello World

Facts

At a glance

What it does

When your agent uses it

Example prompts

Requirements

Workflow steps

What it can do on your machine

Tool permissions

Runs code

Network

Credentials

Compatibility

Context cost

Safety

SKILL.md

Anthropic Hello World

Overview

Prerequisites

Instructions

Step 1: Basic Message

Step 2: Add a System Prompt

Step 3: Multi-Turn Conversation

Python Example

Output

Error Handling

Available Models

Examples

Resources

Next Steps

Files

Compare with similar skills

Similar skills

More from jeremylongshore/tons-of-skills-marketplace

Related

Questions about Clade Hello World