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fix(brain): wrap Google Chat responses in Add-ons DataActions envelope

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Google Workspace Add-ons expect responses wrapped in:
  { "hostAppDataAction": { "chatDataActionMarkup": { "createMessageAction": { "message": {...} } } } }

Returning a raw Message object causes Google Chat to show "not responding"
even though the HTTP status is 200. The endpoint was receiving requests
correctly (confirmed via Cloud Run logs) but responses were being silently
dropped by the Add-ons framework.

Ref: https://developers.google.com/workspace/add-ons/chat/build

Co-Authored-By: claude-flow <ruv@ruv.net>
This commit is contained in:
rUv 2026-03-25 20:27:59 +00:00
parent 24441765c3
commit 9716334a20
1 changed files with 27 additions and 4 deletions
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31
crates/mcp-brain-server/src/routes.rs
View file

@ -6069,9 +6069,17 @@ struct GoogleChatUser {
email: Option<String>,
}
/// Google Chat card response — always includes `text` fallback for HTTP endpoint mode
/// Google Chat response wrapped in the Add-ons DataActions format.
///
/// Google Workspace Add-ons expect responses wrapped in:
/// { "hostAppDataAction": { "chatDataActionMarkup": { "createMessageAction": { "message": {...} } } } }
///
/// NOT the raw Message object. Returning a raw Message causes Google Chat
/// to show "not responding" even though the HTTP status is 200.
///
/// See: https://developers.google.com/workspace/add-ons/chat/build
fn chat_card(title: &str, subtitle: &str, sections: Vec<serde_json::Value>) -> serde_json::Value {
serde_json::json!({
let message = serde_json::json!({
"text": format!("{} — {}", title, subtitle),
"cardsV2": [{
"cardId": "brain-response",
@ -6085,6 +6093,21 @@ fn chat_card(title: &str, subtitle: &str, sections: Vec<serde_json::Value>) -> s
"sections": sections
}
}]
});
wrap_chat_response(message)
}
/// Wrap a Chat Message in the Add-ons DataActions envelope.
fn wrap_chat_response(message: serde_json::Value) -> serde_json::Value {
serde_json::json!({
"hostAppDataAction": {
"chatDataActionMarkup": {
"createMessageAction": {
"message": message
}
}
}
})
}
@ -6118,9 +6141,9 @@ async fn google_chat_handler(
Err(err) => {
let raw = String::from_utf8_lossy(&body);
tracing::warn!("Failed to parse Chat event: {}. Raw: {}", err, &raw[..raw.len().min(500)]);
return Json(serde_json::json!({
return Json(wrap_chat_response(serde_json::json!({
"text": "Pi Brain received your message but couldn't parse it. Try: help"
}));
})));
}
};