feat(core): add session form service (#34855)

packages/tui/src/feature-plugins/system/notifications.ts

@@ -1,6 +1,7 @@
 import type { V2Event } from "@opencode-ai/sdk/v2"
 import type { TuiAttentionSoundName, TuiPlugin, TuiPluginApi } from "@opencode-ai/plugin/tui"
 import type { BuiltinTuiPlugin } from "../builtins"
+import { isQuestionForm } from "../../util/question-form"
 
 const id = "internal:notifications"
 
@@ -46,6 +47,21 @@ const tui: TuiPlugin = async (api) => {
     questions.delete(event.data.requestID)
   })
 
+  api.event.on("form.created", (event) => {
+    if (!isQuestionForm(event.data.form)) return
+    if (questions.has(event.data.form.id)) return
+    questions.add(event.data.form.id)
+    notify(api, event.data.form.sessionID, "Question needs input", "question")
+  })
+
+  api.event.on("form.replied", (event) => {
+    questions.delete(event.data.id)
+  })
+
+  api.event.on("form.cancelled", (event) => {
+    questions.delete(event.data.id)
+  })
+
   api.event.on("permission.asked", (event) => {
     if (permissions.has(event.data.id)) return
     permissions.add(event.data.id)