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valibot

valibot is a plugin for Claude Code from open-circle/agent-skills. Its manifest loads nothing; the 1 skill it bundles cost 56 tokens per session together, scanned A, a copy of open-circle marketplace, MIT.

A schema-validation library for checking whether data matches a defined shape, with TypeScript support.

In plain words
What is it for?
Use it to define reusable data schemas and validate values received from forms, APIs, configuration files, or other external sources.
Why use it?
It helps catch missing, unexpected, or incorrectly typed data at the boundaries of an application.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

not rated 17repo +1 9d ago A scan tokens not measured copy · 86% MIT

Good fit Use it to define reusable data schemas and validate values received from forms, APIs, configuration files, or other external sources.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add open-circle/agent-skills
/plugin install valibot
View source ↗ open-circle/agent-skills
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/open-circle/agent-skills

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for valibot

README.md
[![agentmods](https://agentmods.dev/badge/plugins/open-circle/agent-skills/valibot/github.svg)](https://agentmods.dev/plugins/open-circle/agent-skills/valibot)
Your own site
<a href="https://agentmods.dev/plugins/open-circle/agent-skills/valibot"><img src="https://agentmods.dev/badge/plugins/open-circle/agent-skills/valibot/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for valibot

Your own site · 80×15
<a href="https://agentmods.dev/plugins/open-circle/agent-skills/valibot"><img src="https://agentmods.dev/badge/plugins/open-circle/agent-skills/valibot.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 1 skill cost 56 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin 86% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

valibot scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

This is a copy

86% identical to open-circle marketplace — 44 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

skills/valibot/.claude-plugin/plugin.json · 14 lines

What it actually says

{
  "name": "valibot",
  "description": "Schema validation with Valibot, the modular and type-safe schema library",
  "version": "1.0.0",
  "author": {
    "name": "Open Circle",
    "url": "https://github.com/open-circle"
  },
  "homepage": "https://valibot.dev",
  "repository": "https://github.com/open-circle/agent-skills",
  "license": "MIT",
  "keywords": ["valibot", "schema", "validation", "typescript"]
}
Contents

What it installs

The manifest is a name and a version. 1 skill travel with it, and installing the plugin installs all of them — 56 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2mo ago First seen · 14 lines scan A aa335cff8536

Subscribe to this mod's changes

valibot is a plugin published in the GitHub repository open-circle/agent-skills (17 stars, last pushed 9d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. It is 86% identical to open-circle marketplace, differing in 44 lines, and is treated as a copy.

Backend and APIs
Related

valibot compared with plugins from other repositories

valibot next to 6 plugins from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
valibotopen-circle/agent-skillsPlugin179d agoMITA—Claude Code
app-builderadobe/skillsPlugin319yesterdayApache-2.0A—Claude Code
rails-consultantthoughtbot/rails-consultantPlugin287d agoMITA—Claude Code
load-testerrohitg00/awesome-claude-code-toolkitPlugin2.8k5mo agoApache-2.0A—Claude Code
rabbitmqadminfprochazka/claude-code-pluginsPlugin1428d agoMITA—Claude Code
jpm-payments-skillsjpmorgan-payments/pdp-skillsPlugin81mo agoApache-2.0A—Claude Code
authhimself65/auth-specPlugin4128d agononeA—Claude Code