agentmods.dev

formisch

formisch is a plugin for Claude Code from open-circle/agent-skills. Its manifest loads nothing; the 1 skill it bundles cost 68 tokens per session together, scanned A, a copy of open-circle marketplace, MIT.

A schema-based library for validating web forms without imposing a user-interface design. It is designed for TypeScript applications.

In plain words
What is it for?
Use it to define form rules and validate fields in applications built with supported frameworks such as React, Vue, Angular, Svelte, or Solid.
Why use it?
It separates form data and validation rules from the visual design, so developers can build the interface they need while checking user input consistently.

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 · 91% MIT

Good fit Use it to define form rules and validate fields in applications built with supported frameworks such as React, Vue, Angular, Svelte, or Solid.

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

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

Your own site · 80×15
<a href="https://agentmods.dev/plugins/open-circle/agent-skills/formisch"><img src="https://agentmods.dev/badge/plugins/open-circle/agent-skills/formisch.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 68 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 91% copy Near-identical to another mod in the catalogue.
Security

Grade A, and why

formisch 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

91% 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/formisch/.claude-plugin/plugin.json · 14 lines

What it actually says

{
  "name": "formisch",
  "description": "Form validation with Formisch, the schema-based, headless form library",
  "version": "1.0.0",
  "author": {
    "name": "Open Circle",
    "url": "https://github.com/open-circle"
  },
  "homepage": "https://formisch.dev",
  "repository": "https://github.com/open-circle/agent-skills",
  "license": "MIT",
  "keywords": ["formisch", "forms", "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 — 68 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 e4df781f1faf

Subscribe to this mod's changes

formisch 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 91% identical to open-circle marketplace, differing in 44 lines, and is treated as a copy.

Frontend
Related

formisch compared with plugins from other repositories

formisch next to 6 plugins from other repositories
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formischopen-circle/agent-skillsPlugin179d agoMITA—Claude Code
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nextjsvercel/next.jsPlugin143kyesterdayMITA—Claude Code
themes-examplegoogle-gemini/gemini-cliPlugin109kyesterdayApache-2.0A—Gemini CLI
knowledge-work-plugins marketplaceanthropics/knowledge-work-pluginsPlugin35k2d agoApache-2.0A—Claude Code
code-modernizationanthropics/claude-plugins-officialPlugin46kyesterdayApache-2.0A—Claude Code