One filled pill ("use my saved default") beside a free-text field, for a config question that almost always wants the same answer but sometimes needs a one-off override. The pill and the field write the SAME target ValueStore — whichever the reader touched last wins, so there is no separate "which mode" flag anywhere to fall out of sync.
| Surface | Note |
|---|---|
| Renders the free-text field only, no pill, no click affordance. |
| Field | Type | |
|---|---|---|
| target | string (required). A ValueStore primitive's id. | required |
| default_option | object {label}. The pill's label, e.g. "From my profile". | optional |
| default_domains | string. What the pill resets target to. | optional |
| free_entry | object {placeholder}. Placeholder for the text field. | optional |
{
"type": "domain_picker",
"target": "end-node"
}{
"identifier": "urn:air:a2uicatalog.ai:atom:domain_picker",
"displayName": "Domain Picker",
"type": "application/vnd.a2ui.atom+json",
"url": "https://a2uicatalog.ai/atoms/domain_picker",
"capabilities": [
"google-apps-script-web",
"mcp-apps"
],
"description": "One filled pill (\"use my saved default\") beside a free-text field, for a config question that almost always wants the same answer but sometimes needs a one-off override. The pill and the field write the SAME target ValueStore \u2014 whichever the reader touched last wins, so there is no separate \"which mode\" flag anywhere to fall out of sync.",
"representativeQueries": [
"show a default-pill plus free-text override for a config question",
"one filled pill (\"use my saved default\") beside a free-text field, for a config question that almost",
"render a domain picker"
]
}The renderer is an open-source Google Apps Script web app. Deploy your own instance in 4 commands — you own the URL, no dependency on the demo endpoint.
git clone https://github.com/a2uicatalog/a2ui
cd a2ui/apps-script-surface/gas-wired-renderer
clasp push && clasp deploy