Open Circle Agent Skills

Teach AI agents how to use Valibot and Formisch.

What are Agent Skills?
What These Skills Do
When to Use These
Examples
Skills Included
Installation
Usage
Skill Structure
Contributing
About Open Circle
License

What are Agent Skills?

Agent Skills are a lightweight, open format for extending AI agent capabilities with specialized knowledge and workflows. Each skill is a folder containing a SKILL.md file with metadata and instructions that help AI agents understand how to use specific tools and libraries.

Learn more at agentskills.io

What These Skills Do

These skills teach agents the correct patterns and best practices for using Valibot and Formisch.

When to Use These

Use these skills if your agent system needs to:

Generate, validate, or reason about structured data with Valibot
Handle multi-step or stateful form workflows with Formisch

Examples

Valibot Schema

import * as v from "valibot";

const UserSchema = v.object({
  name: v.pipe(v.string(), v.nonEmpty("Please enter your name.")),
  email: v.pipe(
    v.string(),
    v.nonEmpty("Please enter your email."),
    v.email("The email address is badly formatted."),
  ),
  age: v.pipe(v.number(), v.minValue(13, "You must be at least 13 years old.")),
});

const result = v.safeParse(UserSchema, data);
if (result.success) {
  console.log(result.output); // { name: string, email: string, age: number }
} else {
  console.log(result.issues);
}

Formisch Form (React)

import { Field, Form, useForm } from "@formisch/react";
import type { SubmitHandler } from "@formisch/react";
import * as v from "valibot";

const LoginSchema = v.object({
  email: v.pipe(v.string(), v.email()),
  password: v.pipe(v.string(), v.minLength(8)),
});

export default function LoginPage() {
  const loginForm = useForm({ schema: LoginSchema });

  const handleSubmit: SubmitHandler<typeof LoginSchema> = (output) => {
    console.log(output); // { email: string, password: string }
  };

  return (
    <Form of={loginForm} onSubmit={handleSubmit}>
      <Field of={loginForm} path={["email"]}>
        {(field) => (
          <div>
            <input {...field.props} value={field.input} type="email" />
            {field.errors && <div>{field.errors[0]}</div>}
          </div>
        )}
      </Field>
      <Field of={loginForm} path={["password"]}>
        {(field) => (
          <div>
            <input {...field.props} value={field.input} type="password" />
            {field.errors && <div>{field.errors[0]}</div>}
          </div>
        )}
      </Field>
      <button type="submit">Login</button>
    </Form>
  );
}

Skills Included

Skill	Purpose	When to use
valibot	Schema definition and validation	Validating data structures, API responses, or user input
formisch	Form state handling	Managing multi-step forms or structured data collection

Installation

Compatible with agents that support Agent Skills

Install the skills using the CLI:

npx skills add open-circle/agent-skills

Or copy individual skill folders into your project's .skills/ directory.

Usage

Activation behavior varies by agent. Check if your agent supports Agent Skills and refer to its documentation.

Skill Structure

Each skill folder contains:

SKILL.md — Instructions and metadata for the agent
references/ — Additional documentation (optional)
scripts/ — Executable code (optional)
assets/ — Templates and resources (optional)

Contributing

We welcome contributions! Please see CONTRIBUTING.md for guidelines.

About Open Circle

Open Circle is a GitHub organization serving as a shared home for open-source projects that share a philosophy around modularity, type safety, and developer experience.

Projects

Valibot — The modular and type safe schema library for validating structural data
Formisch — The modular and type-safe form library for any framework

License

This repository is licensed under the MIT License.

valibot