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.
npx skills add roedyrustam/vibes-plug --skill form-validation-expertgit clone --depth 1 https://github.com/roedyrustam/vibes-plugWrote 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.
[](https://agentmods.dev/skills/roedyrustam/vibes-plug/form-validation-expert)<a href="https://agentmods.dev/skills/roedyrustam/vibes-plug/form-validation-expert"><img src="https://agentmods.dev/badge/skills/roedyrustam/vibes-plug/form-validation-expert/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.
<a href="https://agentmods.dev/skills/roedyrustam/vibes-plug/form-validation-expert"><img src="https://agentmods.dev/badge/skills/roedyrustam/vibes-plug/form-validation-expert.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00069 | $0.05036 |
| Opus 5.5 | $0.00028 | $0.02014 |
| Sonnet 5.5 | $0.00014 | $0.01007 |
| Haiku 4.5 | $0.00007 | $0.00504 |
Grade A, and why
form-validation-expert 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 4d 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.
How it starts
The opening of the file, as written. The whole thing — 508 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Form & Validation Expert (2026 Edition)
English
Orchestration & Integration
Connects and orchestrates with relevant domain skills:
modern-web-guidance: Evaluates native form validation features (:user-valid,:user-invalid), autofill tokens, and custom selects.modern-css-native-expert: Leveragesfield-sizing: contentfor dynamic textareas and pure CSS validation feedback.design-system-architect: Provides accessible form control primitives, input borders, and floating label tokens.anti-slop: Eliminates vague error messages, double-submission bugs, and unhandled pending states.senior-frontend: React 19useActionState,useOptimistic, and server action form submission.brainstorming,zero-to-prod-orchestrator,session-memory-manager: Continuous lifecycle execution.
Description
Production-grade guide for building robust, accessible, and user-friendly forms. Covers React Hook Form v7+ with Zod/Valibot resolvers, server-side validation with useActionState + Zod, multi-step form wizards, dynamic forms from JSON Schema, autofill-friendly patterns, optimistic form submission with useOptimistic, Conform (progressive enhancement), and form accessibility (ARIA, error announcements).
Trigger Conditions
Activate this skill when:
- Building forms with client-side validation (React Hook Form, Zod, Valibot).
- Implementing server-side form validation with React 19 Server Actions.
- Creating multi-step form wizards with state persistence.
- Building dynamic forms generated from schema definitions.
- Making forms accessible (ARIA attributes, error announcements).
- Implementing file upload forms with drag-and-drop.
- Optimizing forms for autofill and mobile usability.
Form Library Selection Guide
| Library | Best For | Key Strength |
|---|---|---|
| React Hook Form + Zod | Most React apps | Performance (uncontrolled), rich ecosystem |
| Conform | Progressive enhancement, RSC | Works without JS, native validation |
| Formik | Legacy projects | Mature, large community (declining) |
| TanStack Form | Complex, headless forms | Framework-agnostic, type-safe |
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.
- 4d ago Changed · -9 lines 70c2750cb1d8
- 5d ago Changed · +1 lines 61ffbfe669af
- 8d ago Changed e9445cc5d3b2
- 17d ago Changed 2d183e2f65e4
- 22d ago Changed 322f2387109d
- 23d ago Changed · +90 lines ecaa303fcba4
- 25d ago Changed · +12 lines · +58 tokens per session 1dacb0b7de34
- 27d ago Changed · +6 lines · -58 tokens per session e73554ea756c
- 1mo ago Changed 6eee8cd3a7cd
- 1mo ago First seen · 408 lines · 69 tokens per session scan A 1383c70f7d48
form-validation-expert is a skill published in the GitHub repository roedyrustam/vibes-plug (113 stars, last pushed yesterday), licensed MIT. It adds 69 tokens to every session and 5,036 once invoked, about $0.0003 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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