fix: remove the max subagent logic

core/framework/graph/event_loop_node.py

@@ -1353,25 +1353,13 @@ class EventLoopNode(NodeProtocol):
 
                 elif tc.tool_name == "delegate_to_sub_agent":
                     # --- Framework-level subagent delegation ---
-                    max_sa = getattr(ctx.node_spec, "max_sub_agents", 3) or 0
-                    if max_sa and len(pending_subagent) >= max_sa:
-                        result = ToolResult(
-                            tool_use_id=tc.tool_use_id,
-                            content=(
-                                f"Sub-agent limit reached ({max_sa} per turn). "
-                                "Wait for current sub-agents to finish before delegating more."
-                            ),
-                            is_error=True,
-                        )
-                        results_by_id[tc.tool_use_id] = result
-                    else:
-                        # Queue for parallel execution in Phase 2
-                        logger.info(
-                            "🔄 LLM requesting subagent delegation: agent_id='%s', task='%s'",
-                            tc.tool_input.get("agent_id", "?"),
-                            (tc.tool_input.get("task", "")[:100] + "...") if len(tc.tool_input.get("task", "")) > 100 else tc.tool_input.get("task", ""),
-                        )
-                        pending_subagent.append(tc)
+                    # Queue for parallel execution in Phase 2
+                    logger.info(
+                        "🔄 LLM requesting subagent delegation: agent_id='%s', task='%s'",
+                        tc.tool_input.get("agent_id", "?"),
+                        (tc.tool_input.get("task", "")[:100] + "...") if len(tc.tool_input.get("task", "")) > 100 else tc.tool_input.get("task", ""),
+                    )
+                    pending_subagent.append(tc)
 
                 else:
                     # --- Real tool: check for truncated args, else queue ---

core/framework/graph/node.py

@@ -209,11 +209,6 @@ class NodeSpec(BaseModel):
         default_factory=list,
         description="Node IDs that can be invoked as subagents from this node",
     )
-    max_sub_agents: int = Field(
-        default=3,
-        description="Max concurrent subagent delegations per turn. 0 = unlimited.",
-    )
-
     # For function nodes
     function: str | None = Field(
         default=None, description="Function name or path for function nodes"