custom-widgets SKILL.md skillA

custom-widgets from mendixlabs/mxcli is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

mdr add mendixlabs/mxcli/custom-widgets@git:20261029.ab9ef62

Pins git:20261029.ab9ef62 in mdr.lock. Pin the fingerprint instead.

Audit grade

A, 17 of 17 checks passed

Kind

SKILL.md skill

Repository

mendixlabs/mxcli

Path

.claude/skills/mendix/custom-widgets/SKILL.md

Versions recorded

20

Latest version

git:20261029.ab9ef62, committed Oct 29, 2026

First version recorded

Sep 12, 2026

Size

32,288 bytes

Repository stars

137

License

Apache-2.0

MDL syntax for pluggable widgets in CREATE PAGE / ALTER PAGE — any installed widget is named by its own name (`htmlelement frame (…) { … }`), with object lists and child slots read from its definition. Covers GALLERY, COMBOBOX, DataGrid2, charts and third-party widgets: datasource and column forms, child slots (TEMPLATE/FILTER), the `pluggablewidget '<id>'` fallback, and adding a widget via .def.json. Use when placing a pluggable widget on a page, or when `mxcli widget describe` output needs…

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

<!-- skill-index: generated by scripts/skill-index.py; make check-skill-index -->
## Find it fast

`sed -n '<from>,<to>p' SKILL.md` one section rather than reading the file;
`./mxcli syntax <topic>` answers *how do I write this* for a fraction of either.

| lines | section |
|---|---|
| 27-151 | Any installed widget is named by its own name |
| 152-253 | Built-in Pluggable Widgets |
| 254-342 | Charts (Mendix Charts.mpk) |
| 343-490 | Adding a Third-Party Widget |
| 491-516 | Authoring over MCP (live Studio Pro) |
| 517-619 | .def.json Reference |
| 620-680 | Engine Internals |
| 681-696 | Verify & Debug |
| 697-708 | Common Mistakes |
| 709-720 | Key Source Files |

<!-- /skill-index -->
# Custom & Pluggable Widgets in MDL

## Any installed widget is named by its own name

If a widget is installed in `widgets/`, MDL names it directly — no keyword list,
no widget id:

```sql
htmlelement frame (tagName: 'div', tagContentMode: 'container') {
  attribute a1 (attributeName: 'data-testid', attributeValueType: 'expression')
  tagcontentcontainer body {
    dynamictext caption (Content: 'Inside the element')
  }
}
```
…

Read the whole file at its exact version.

How to install

mdr add mendixlabs/mxcli/custom-widgets@sha256:787a216a3f943889

[![mdr](https://markdownregistry.com/badge/art_f4sq5s6fhapjlc3e.svg)](https://markdownregistry.com/a/art_f4sq5s6fhapjlc3e)

Versions

The registry has recorded 20 versions of this file, between Sep 12, 2026 and Oct 29, 2026, about one every 2 days.

Audit of the latest version

Source

API

GET https://markdownregistry.com/api/v1/artifacts/art_f4sq5s6fhapjlc3e
GET https://markdownregistry.com/api/v1/resolve?ref=mendixlabs/mxcli/custom-widgets
GET https://markdownregistry.com/api/v1/blob/787a216a3f94388984bbff45334988cfe232c5c245da4497dfa0733ea88a0f5a

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

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