klytos-custom-fields

name	klytos-custom-fields
description	Guide for creating and managing custom fields and metadata in Klytos CMS. Use when attaching extra data to pages, users, or custom post types, storing metadata on entities, working with the Meta API, or using the Field Manager. Covers two systems: MetaManager for free-form key-value data and FieldManager for structured typed fields with 27 field types, validation rules, and schema enforcement.

Klytos Custom Fields & Metadata

Two Systems

1. MetaManager — Free-form key-value on any entity (flexible, no schema)
2. FieldManager — Structured fields on Custom Post Types (typed, validated, 27 types)

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MetaManager (Free-Form)

klytos_get_meta(string $collection, string $entityId, string $key): mixed
klytos_set_meta(string $collection, string $entityId, string $key, mixed $value): void
klytos_delete_meta(string $collection, string $entityId, string $key): bool
klytos_get_all_meta(string $collection, string $entityId): array

Key Convention: plugin_id.key_name

klytos_set_meta('pages', 'about', 'seo-pro.schema_type', 'Organization');
$schema = klytos_get_meta('pages', 'about', 'seo-pro.schema_type'); // 'Organization'
$all = klytos_get_all_meta('pages', 'about'); // ['seo-pro.schema_type' => 'Organization']

Hooks

Hook	Type	Arguments
meta.before_set	action	string $collection, string $entityId, string $key, mixed $value
meta.after_set	action	string $collection, string $entityId, string $key, mixed $value
meta.get	filter	mixed $value, string $collection, string $entityId, string $key

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FieldManager (Structured, 27 Types)

Type	Description
text, textarea, richtext	Text fields
number, range	Numeric
email, phone, url	Contact
date, datetime, time	Date/time
color	Color picker
image, file, video, audio	Media
select, multiselect, checkbox, radio	Choice
toggle, boolean	Boolean
password, code, json	Special
repeater	Repeatable group
relationship	Link to entities

Via MCP

klytos_add_custom_field:

{"post_type_id": "products", "field_id": "price", "field_type": "number", "label": "Price", "required": true, "validation": {"min": 0}}

klytos_add_custom_field (select):

{"post_type_id": "products", "field_id": "condition", "field_type": "select", "label": "Condition", "options": [{"value": "new", "label": "New"}, {"value": "used", "label": "Used"}]}

klytos_add_custom_field (repeater):

{"post_type_id": "products", "field_id": "specs", "field_type": "repeater", "label": "Specs", "sub_fields": [{"field_id": "name", "field_type": "text", "label": "Name"}, {"field_id": "value", "field_type": "text", "label": "Value"}]}

klytos_set_bulk_field_values:

{"post_type_id": "products", "entry_slug": "iphone", "values": {"price": 999, "condition": "new", "specs": [{"name": "Storage", "value": "256GB"}]}}

klytos_update_custom_field / klytos_remove_custom_field / klytos_get_field_types

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When to Use Which

Scenario	System
Plugin stores data on a page	MetaManager
SEO plugin adds meta to any entity	MetaManager
Product has a price field	FieldManager
Structured data with validation	FieldManager
Temporary/internal plugin data	MetaManager
User-facing content fields	FieldManager

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Source Files

• Meta manager: core/meta-manager.php
• Field manager: core/post-type-manager.php
• MCP tools: core/mcp/tools/custom-field-tools.php
• Global meta functions: core/helpers-global.php (lines 518-572)