Patch System

If you want your resource pack to work in vanilla Minecraft as well, you can use the patch system: it allows you to insert templates instead of any model. The idea behind patches is that vanilla model types should be kept in the items folder, while those added by the mod should be in rpt/templates.

Usage

RPT can read an optional rpt$patch field, which points to a patch template link:

{
    "model": {
        "type": "minecraft:select",
        "property": "minecraft:component",
        "component": "custom_name",
        "cases": [
            {
                "when": ["cool", "name"],
                "model": {
                    "rpt$patch": "foo:path/to/patch/template", 
                    "type": "model",
                    "model": "foo:bar"
                }
            }
        ]
    }   
}

In this case, if we have a template like this...

{
    "model": {
        "type": "select",
        // some parameters...
        "cases": [
            {...}
        ]
    }
}

...then "under the hood" of the game, the item model will turn into this:

{
    "model": {
        "type": "minecraft:select",
        "property": "minecraft:component",
        "component": "custom_name",
        "cases": [
            {
                "when": ["cool", "name"],
                "model": {
                    "type": "select",
                    // some parameters...
                    "cases": [
                        {...}
                    ]
                }
            }
        ]
    }   
}