form-building

Development

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.

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Source SKILL.md: https://github.com/BuilderIO/agent-native/blob/HEAD/templates/forms/.agents/skills/form-building/SKILL.md

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Form Building

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.

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

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]+quot;,
    "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 above
label — display label
required — boolean

Optional properties

placeholder — input placeholder text
description — help text below the field
options — array of strings (required for select, multiselect, radio)
validation — min/max/pattern/message for custom validation
conditional — show field only when another field matches a condition
width — "full" (default) or "half" for side-by-side layout

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-form with title and fields
Preview in the GUI (agent + user iterate)
update-form --status published to 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