@openstreetmap/id-tagging-schema/data/fields/hashtags.json

The OpenStreetMap tagging model used by the iD editor

{
    "key": "hashtags",
    "type": "semiCombo",
    "label": "Hashtags",
    "usage": "changeset",
    "placeholder": "#example",
    "autoSuggestions": false,
    "caseSensitive": true
}