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Agent skill

Extend Prop Types

by elementor in elementor/elementor

External: Add or extend a prop type from a third-party plugin.

GPL-3.0Auto-check passed

Install Extend Prop Types

skills CLI
$ npx skills add elementor/elementor --skill extend-prop-types -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install elementor/elementor extend-prop-types --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/elementor/elementor.git skills-src && mkdir -p .claude/skills && cp -r skills-src/.cursor/skills/extend-prop-types .claude/skills/extend-prop-types && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
extend-prop-types
GitHub stars
7.1k
Token cost
~1.7k tokens
SKILL.md length
447 words
Files
1
Skills in repo
8
Repo updated
First seen
Licence
GPL-3.0

At a glance

External: Add or extend a prop type from a third-party plugin.

  • Works in 4 steps: Start with the prop type — storage… → PHP prop type — extend a base from… → Wire schema — pick one scope → …
  • SKILL.md covers Implementation location, Prerequisites, Checklist and Object prop type skeleton, plus 4 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Extend Prop Types is an agent skill from elementor/elementor. External: Add or extend a prop type from a third-party plugin. Description also covers transformers for render/import/export. PHP PropType, createPropUtils, atomic-widgets hooks.

Its SKILL.md is about 1.7k tokens, which your agent loads only when the skill is triggered. It is a single SKILL.md file with no bundled scripts.

It works with PHP. The repository describes itself as: The most advanced frontend drag & drop page builder. Create high-end, pixel perfect websites at record speeds. Any theme, any page, any design. The licence is GPL-3.0.

Example prompts

  • “/extend-prop-types”

Workflow steps

4 steps, taken from the first numbered list in SKILL.md.

  1. Start with the prop type — storage shape, validation, JSON Schema (to_json_schema()). Add a transformer only when render/import/export…
  2. PHP prop type — extend a base from Elementor\Modules\AtomicWidgets\PropTypes\Base\ (Plain_Prop_Type, Object_Prop_Type, Array_Prop_Type)…
  3. Wire schema — pick one scope
  4. Register transformers when needed (priority 20+ to override core defaults at 10)

What it can do on your machine

Read from SKILL.md and the folder at commit dd32c13. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are php).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Extend Prop Types loads about 1.7k tokens when it runs. Until then it costs about 49 tokens; SKILL.md has 447 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~49
When it runs · the whole SKILL.md, loaded when a task matches
~1.7k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

The full file from elementor/elementor at commit dd32c13, republished under its GPL-3.0 licence (© elementor). 447 words, ~1,717 tokens.

Download SKILL.mdSave it as .claude/skills/extend-prop-types/SKILL.md (or your agent's skills folder).
name
extend-prop-types
description
External: Add or extend a prop type from a third-party plugin. Description also covers transformers for render/import/export. PHP Prop_Type, createPropUtils, atomic-widgets hooks.

Extend prop types

Scope: External — the full documented outcome is shippable from a 3rd-party plugin via elementor/atomic-widgets/* schema and {context}/transformers/register hooks plus your own TS prop utils; no Core changes required. Changing the global prop vocabulary (core prop-types/) is Core-only. Full split + disclaimer: skills-scope.md.

Implementation location

  • PHP: existing or new third-party plugin repository; plugin-owned prop types and transformers (e.g. MyPlugin\PropTypes\, MyPlugin\Transformers\).
  • Editor TS: plugin-owned package/bundle registered through add-editor-package; mirror patterns from @elementor/editor-props.
  • Do not modify Elementor Core. Global vocabulary lives in modules/atomic-widgets/prop-types/ and packages/packages/libs/editor-props/src/prop-types/ — reference only.
  • Runnable reference: examples/example-plugin/ (Badge_Prop_Type + settings transformer).

Prerequisites

Read first: fundamentals/prop-types.md, fundamentals/transformers.md, fundamentals/validation.md, atomic-widgets/hooks.md.

Checklist

  1. Start with the prop type — storage shape, validation, JSON Schema (to_json_schema()). Add a transformer only when render/import/export needs a different output from the stored shape.
  2. PHP prop type — extend a base from Elementor\Modules\AtomicWidgets\PropTypes\Base\ (Plain_Prop_Type, Object_Prop_Type, Array_Prop_Type); primitives from PropTypes\Primitives\ (e.g. String_Prop_Type); unions via PropTypes\Union_Prop_Type::make()->add_prop_type() (use Union_Prop_Type::create_from( $existing ) to widen a key that is not already a union — see extend-variables step 2 for the already-a-union case). Implement get_key(), define_shape() (objects), validate_value(), sanitize_value(). Object validate_value(): each shape key in $value is a nested PropValue ($field['value']), not a plain scalar — see Html_V3_Prop_Type. Example: docs/atomic-builder/examples/extend-prop-types.md.
  3. Wire schema — pick one scope
    • Widget-only: define_props_schema() on the widget class (preferred for type-specific props).
    • Global: filter elementor/atomic-widgets/props-schema (all elements).
    • Style keys: filter elementor/atomic-widgets/styles/schema — style-schema.md.
  4. Register transformers when needed (priority 20+ to override core defaults at 10):
php
add_action( 'elementor/atomic-widgets/settings/transformers/register', function ( $registry ) {
    $registry->register( 'my-type', new My_Settings_Transformer() ); // key must match $$type
}, 20 );

Hook receives ( Transformers_Registry $registry, Props_Resolver $resolver ).

Contexts: settings, styles, import, export, plain — hook pattern:

elementor/atomic-widgets/{context}/transformers/register

Note: plain is registered in Core (elementor/atomic-widgets/plain/transformers/register in modules/atomic-widgets/module.php) alongside settings, styles, import, and export — valid even though hooks.md omits it from its list.

Show full SKILL.md (170 more words)Show less
  1. TypeScript mirror (when editor validation/UI needs it) — createPropUtils() + propTypeToJsonSchema() in your editor package init(). There is no global editor registry like registerVariableType — unlike variables, general prop types rely on custom controls (elementor/atomic-widgets/controls filter) and/or your package exports.
  2. If this prop type is used in styles — legacy CSS import also needs internal-extend-css-converter (Internal; no public discovery hook). Style schema + transformer alone do not cover import.
  3. Editor controls — match control to prop shape (e.g. Select_Control for enums); filter elementor/atomic-widgets/controls when built-ins are insufficient.
  4. MCP — filter elementor/atomic-widgets/llm-json-schema to post-process single-prop JSON Schema.
  5. Verify — PropValue { $$type, value }; transformer receives inner payload; chained transform depth ≤ 3; disabled: true → null.

Object prop type skeleton

php
use Elementor\Modules\AtomicWidgets\PropTypes\Base\Object_Prop_Type;
use Elementor\Modules\AtomicWidgets\PropTypes\Primitives\String_Prop_Type;

class My_Object_Prop_Type extends Object_Prop_Type {
    public static function get_key(): string {
        return 'my-object';
    }

    protected function define_shape(): array {
        return [
            'label' => String_Prop_Type::make(),
        ];
    }

    protected function validate_value( $value ): bool {
        // Each $value['label'] is ['$$type' => 'string', 'value' => '...'] — not a bare string.
        return parent::validate_value( $value );
    }
}

Transformer skeleton

php
class My_Transformer extends \Elementor\Modules\AtomicWidgets\PropsResolver\Transformer_Base {
    public function transform( $value, \Elementor\Modules\AtomicWidgets\PropsResolver\Props_Resolver_Context $context ) {
        return +$value['size'] . $value['unit']; // inner PropValue payload, not full envelope
    }
}

External implementation path

  • Own PHP classes in the plugin; hook elementor/atomic-widgets/* filters/actions.
  • Own TS prop utils in editor package; plain-value resolvers: elementor/atomic-widgets/settings-resolvers/register.

Core reference paths (do not edit)

  • Global vocabulary → modules/atomic-widgets/prop-types/ + packages/packages/libs/editor-props/src/prop-types/.
  • Union wrapping: Prop_Types_Schema_Extender (dynamic tags, variables).

See also

© elementor, GPL-3.0. Rendered from Markdown: HTML in the file is shown as text, images as links, and headings moved down two levels. Raw file

Files

Just SKILL.md in .cursor/skills/extend-prop-types of elementor/elementor.

Open the folder on GitHubat commit dd32c13

Compare with similar skills

Extend Prop Types next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Extend Prop Types compared with similar skills
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Extend Prop Types this skillelementor/elementor7.1k—~1.7kAutomated safety check: PassGPL-3.0
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Tailwindcss Developmentanonaddy/anonaddy4.9k10 repos~865Automated safety check: PassMIT
Fortify Developmentcoollabsio/coolify63k4 repos~1.9kAutomated safety check: PassMIT
MCP Developmentcoollabsio/coolify63k1 repos~949Automated safety check: PassMIT
WooCommerce Code Reviewwoocommerce/woocommerce11k3 repos~1.1kAutomated safety check: PassCustom licence

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Works with

Questions about Extend Prop Types

What does Extend Prop Types do?

External: Add or extend a prop type from a third-party plugin. Extend Prop Types is an agent skill from elementor/elementor. External: Add or extend a prop type from a third-party plugin.

How do I install Extend Prop Types in Claude Code?

Run `npx skills add elementor/elementor --skill extend-prop-types -a claude-code`. Or copy the skill folder (.cursor/skills/extend-prop-types in elementor/elementor) into .claude/skills/extend-prop-types in your project. Claude Code loads it when a task matches its description.

How do I install Extend Prop Types in Codex?

Run `npx skills add elementor/elementor --skill extend-prop-types -a codex`. Or copy the skill folder (.cursor/skills/extend-prop-types in elementor/elementor) into .agents/skills/extend-prop-types in your project. Codex loads it when a task matches its description.

Can I use Extend Prop Types in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add elementor/elementor --skill extend-prop-types -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/extend-prop-types, .gemini/skills/extend-prop-types, .github/skills/extend-prop-types and .opencode/skills/extend-prop-types in your project.

What does Extend Prop Types need to run?

SKILL.md names no scripts, command-line tools or credentials: Extend Prop Types is instructions for the agent only.

Does Extend Prop Types access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Extend Prop Types safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Extend Prop Types use?

Extend Prop Types is published under the GPL-3.0 licence (the repository's licence). It allows redistribution, so the full SKILL.md is shown on this page.

How many tokens does Extend Prop Types use?

About 1.7k tokens (SKILL.md is roughly 6.9k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full.

What are the alternatives to Extend Prop Types?

Skills that share tags, products or a category with Extend Prop Types: Configuring Horizon (coollabsio/coolify, 63k stars), Tailwindcss Development (anonaddy/anonaddy, 4.9k stars), Fortify Development (coollabsio/coolify, 63k stars) and MCP Development (coollabsio/coolify, 63k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Extend Prop Types?

elementor (a GitHub organization) maintains it in elementor/elementor, which has 7,084 GitHub stars. The repository holds 8 skills in this directory. The repository was last updated on October 8, 2026.

Source: elementor/elementor on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.