thinking output 2

mac/Sources/Byre/TranscriptBuilder.swift

@@ -276,7 +276,7 @@ final class TranscriptBuilder {
         !parent.isEmpty && ctx.subagents[parent] == nil
     }
 
-    private func addToRun(_ row: Row, _ call: Call?, _ parent: String) {
+    private func addToRun(_ row: Row, _ call: Call, _ parent: String) {
         if let sub = ctx.subagents[parent] {
             sub.run = extendRun(sub.run, row, call, parent) { r in
                 sub.row.body!.rows.append(r)
@@ -289,14 +289,12 @@ final class TranscriptBuilder {
         }
     }
 
-    private func extendRun(_ run: Run?, _ row: Row, _ call: Call?, _ parent: String, _ place: (Row) -> RowList) -> Run {
+    private func extendRun(_ run: Run?, _ row: Row, _ call: Call, _ parent: String, _ place: (Row) -> RowList) -> Run {
         guard let run, run.parent == parent else {
             let list = place(row)
-            return Run(first: row, container: list, calls: call.map { [$0] } ?? [], parent: parent)
-        }
-        if let call {
-            run.calls.append(call)
+            return Run(first: row, container: list, calls: [call], parent: parent)
         }
+        run.calls.append(call)
         if run.group == nil {
             let group = Row(.group, taskId: taskId, body: true)
             group.owner = ctx.subagents[parent]?.row
@@ -449,10 +447,6 @@ final class TranscriptBuilder {
             guard let row = renderEvent(ev) else {
                 continue
             }
-            if ev.kind == "agent.thinking" {
-                addToRun(row, nil, parent)
-                continue
-            }
             if let sub {
                 sub.run = nil
                 sub.row.body!.rows.append(row)
@@ -497,7 +491,7 @@ final class TranscriptBuilder {
             if ev.kind == "task.merge_after_review" && sink == nil {
                 lastMergeAfterReview = row.id
             }
-            put(row)
+            put(row, keepHeld: ev.kind == "agent.thinking")
         }
         return contextChanged
     }