Suggestion for Wikibase Manifest format

manifest.json

{
    "version": "1.0.2", // version of the manifest format
    
    "mediawiki": {
        "name": "Wikidata",
        "root": "https://www.wikidata.org/wiki/",
        "main_page": "https://www.wikidata.org/wiki/Wikidata:Main_Page",
        "api": "https://www.wikidata.org/w/api.php"
         "namespace": {
            "item": "Item", 
            "property": "Property"
        }
    },

    "wikibase": {
        "query": {
            "endpoint": "https://query.wikidata.org/",
            "rate_limit": "TBD" // json expression of query service rate limiting setup
        },
        "prefix": { // full list from https://www.mediawiki.org/wiki/Wikibase/Indexing/RDF_Dump_Format#Full_list_of_prefixes
            "wdata": "http://www.wikidata.org/wiki/Special:EntityData/",
            "wd": "http://www.wikidata.org/entity/",
            "wdt": "http://www.wikidata.org/prop/direct/",
            "wdtn": "http://www.wikidata.org/prop/direct-normalized/", 
            "wds": "http://www.wikidata.org/entity/statement/",
            "p": "http://www.wikidata.org/prop/",
            "wdref": "http://www.wikidata.org/reference/",
            "wdv": "http://www.wikidata.org/value/",
            "ps": "http://www.wikidata.org/prop/statement/",
            "psv": "http://www.wikidata.org/prop/statement/value/", 
            "psn": "http://www.wikidata.org/prop/statement/value-normalized/", 
            "pq": "http://www.wikidata.org/prop/qualifier/", 
            "pqv": "http://www.wikidata.org/prop/qualifier/value/", 
            "pqn": "http://www.wikidata.org/prop/qualifier/value-normalized/", 
            "pr": "http://www.wikidata.org/prop/reference/", 
            "prv": "http://www.wikidata.org/prop/reference/value/", 
            "prn": "http://www.wikidata.org/prop/reference/value-normalized/", 
            "wdno": "http://www.wikidata.org/prop/novalue/"
        },
        "properties": {
            "formatter URI for RDF resource": "P1921",
            "instance of": "P31",
            "subclass of": "P279",
            "properties_for_this_type": "P1963",
            "media_files": ["P123", "P234"] // properties pointing to media files, TBD

        },
        "items": {
            "entity": "Q35120", // root class, "thing"
            "unique_identifier": ["Q88888", "Q777777"], // identifier classes
            "ignore": ["Q1111", "Q22222"], // classes of items not to suggest
            "default_globe": "Q7", // at the moment Earth is hard-coded into the query service
            "default_calendar": "Q9" // is there a calendar hard-coded into the query service?
        },
        "constraints": {} // JSON representation of the constraints extensions config
    },    
    "quickstatements": {
        "endpoint": "https://quickstatements.wmflabs.org"
    },
    "reconciliation": {
        "endpoint": "https://tools.wmflabs.org/openrefine-wikidata/en/api"
    }
}