fix(runtime-events): honor OpenCode progress shapes

src/hooks/runtime-fallback/first-prompt-watchdog.test.ts

@@ -277,6 +277,18 @@ describe("observeEventForWatchdog", () => {
     expect(calls.progress).toEqual([sessionID])
   })
 
+  it.each(assistantProgressParts)("#given a message.part.updated event whose part is type=%s #when observed #then onAssistantProgress is called", (_label: string, part: { readonly type: string; readonly text?: string; readonly id?: string; readonly name?: string; readonly tool_use_id?: string }) => {
+    const calls = freshCalls()
+    observeEventForWatchdog(
+      {
+        type: "message.part.updated",
+        properties: { sessionID, part },
+      },
+      createRecordingWatchdog(calls),
+    )
+    expect(calls.progress).toEqual([sessionID])
+  })
+
   it("#given a message.updated assistant event with parts: [] and no error/finish #when observed #then no progress is signalled (no activity yet)", () => {
     const calls = freshCalls()
     observeEventForWatchdog(

src/hooks/runtime-fallback/first-prompt-watchdog.ts

@@ -46,6 +46,18 @@ export function observeEventForWatchdog(
   const props = event.properties as Record<string, unknown> | undefined
   if (!props) return
 
+  if (event.type === "message.part.updated" || event.type === "message.part.delta") {
+    const sessionID = props.sessionID as string | undefined
+    const part = props.part as Record<string, unknown> | undefined
+    const partType = typeof part?.type === "string"
+      ? part.type
+      : typeof props.type === "string" ? props.type : undefined
+    if (sessionID && partType) {
+      watchdog.onAssistantProgress(sessionID)
+    }
+    return
+  }
+
   if (event.type === "message.updated") {
     const info = props.info as Record<string, unknown> | undefined
     const sessionID = info?.sessionID as string | undefined