Form Building
SkillAI & modelsLets your agent create web forms with fields like text boxes, dropdowns, ratings, and file uploads.
Available today. Use it from your connected AI after setup.
No other account needed.
Add ahel to your AI once: Claude, ChatGPT, Cursor, Claude Code or Codex. Then ask it to use this.
Then ask your AI: use the Form Building skill
About this skill
How to create and structure forms. Use when creating a new form, adding fields, modifying form structure, or understanding field types and their JSON schema.
What this skill tells your AI
The instructions your AI receives, as published by builderio/agent-native in templates/forms/.agents/skills/form-building/SKILL.md and read by ahel’s review.
Creating a Form
Use the create-form script to create forms from natural language:
pnpm action create-form --title "Contact Form" --fields '[...]'
The script generates a unique ID, creates a URL slug, and stores the form in SQL as draft status.
One request, one form
Every form the user describes is its own form. Use create-form for each new
form request even when a form is already open on screen or you created one
earlier in the same conversation — the open form is context, not a default
target. Reach for update-form / patch-form-fields only when the user is
changing that specific form.
| The user says | Call |
|---|---|
| "Create a customer feedback form..." | create-form |
| "Now build an event registration form..." | create-form (a second form) |
| "Add a phone field to it" | patch-form-fields |
| "Rename this form / publish it" | update-form |
| "Rewrite this form as a signup form" | update-form with confirmReplaceFields: true |
update-form rejects a fields replacement that drops most of the form's
existing questions with unconfirmed_field_loss. That error means the call was
about to overwrite a form the user still wants: create the new form instead,
unless they explicitly asked to rewrite this one in place.
Field Types
| Type | Description | Options needed | Example use |
|---|---|---|---|
text | Single-line text input | No | Name, company |
email | Email input with validation | No | Contact email |
number | Numeric input | No | Age, quantity |
textarea | Multi-line text | No | Message, comments |
select | Single-choice dropdown | Yes | Country, department |
multiselect | Multi-choice dropdown | Yes | Skills, interests |
checkbox | Boolean toggle | No | Consent, opt-in |
radio | Single-choice radio buttons | Yes | Gender, preference |
date | Date picker | No | Birthday, deadline |
rating | Star rating (1-5) | No | Satisfaction, quality |
scale | Numeric scale (e.g., 1-10) | No | NPS, likelihood |
file | File upload | No | Resume, attachment |
Field JSON Schema
Each field is a JSON object:
{
"id": "field_name",
"type": "text",
"label": "Your Name",
"placeholder": "Enter your name",
"description": "Help text shown below the field",
"required": true,
"options": ["Option A", "Option B"],
"validation": {
"min": 1,
"max": 100,
"pattern": "^[a-zA-Z]+$",
"message": "Custom error message"
},
"conditional": {
"fieldId": "other_field_id",
"operator": "equals",
"value": "show_this_field"
},
"width": "full"
}
Required properties
id— unique identifier (snake_case recommended)type— one of the types abovelabel— display labelrequired— boolean
Always pass fields as these complete objects. Never encode a field as shorthand
text such as text: Enter a name; patch-form-fields upserts also require the
field id so they cannot be ambiguous.
Optional properties
placeholder— input placeholder textdescription— help text below the fieldoptions— array of strings (required for select, multiselect, radio)validation— min/max/pattern/message for custom validationconditional— show field only when another field matches a conditionwidth—"full"(default) or"half"for side-by-side layoutmultiple,accept,maxSizeBytes,maxFiles— file upload settings forfilefields
Updating a Form
Use update-form to modify any form property:
# Change title
pnpm action update-form --id <id> --title "New Title"
# Update fields
pnpm action update-form --id <id> --fields '[...]'
# Change status
pnpm action update-form --id <id> --status published
Common Form Templates
When a user asks for a common form type, use these field patterns:
Contact form:
[
{"id":"name","type":"text","label":"Name","required":true},
{"id":"email","type":"email","label":"Email","required":true},
{"id":"message","type":"textarea","label":"Message","required":true}
]
Survey/feedback:
[
{"id":"rating","type":"rating","label":"Overall satisfaction","required":true},
{"id":"recommend","type":"scale","label":"How likely to recommend? (1-10)","required":true},
{"id":"feedback","type":"textarea","label":"Additional feedback","required":false}
]
Registration/signup:
[
{"id":"first_name","type":"text","label":"First Name","required":true,"width":"half"},
{"id":"last_name","type":"text","label":"Last Name","required":true,"width":"half"},
{"id":"email","type":"email","label":"Email","required":true},
{"id":"role","type":"select","label":"Role","options":["Student","Professional","Other"],"required":true}
]
Workflow
create-formwith title and fields- Preview in the GUI (agent + user iterate)
update-form --status publishedto go live- Share the public URL:
/f/<slug>
Related Skills
- form-responses — Viewing and analyzing submitted data
- form-publishing — Form lifecycle (draft -> published -> closed)
- scripts — All form operations go through scripts
Signals
- GitHub stars
- 7k
- Forks
- 613
- Last commit
- Sep 2026
Advanced
- Item type
- skill
- Key
form-building- Source
- github.com/builderio/agent-native