builder: require durable workspace execution

agent.py

@@ -35,6 +35,7 @@ class BuilderConfig(BaseModel):
 
 
 _URL_RE = re.compile(r"https?://[a-zA-Z0-9._-]+\.[a-zA-Z]{2,}[\w/?#%&=.-]*")
+DEEPAGENTS_RECURSION_LIMIT = 500
 
 
 class AgentBuilder(A2AAgent[BuilderConfig, NoAuth]):
@@ -130,11 +131,11 @@ class AgentBuilder(A2AAgent[BuilderConfig, NoAuth]):
             async for event in graph.astream_events(
                 {"messages": [{"role": "user", "content": user_msg}]},
                 version="v2",
-                # Default langgraph cap is 25 steps; one deepagents
-                # build (list → write*3 → test → deploy) easily uses
-                # 12-18, and any retry pushes it past the limit. Give
-                # the loop headroom without letting it run away.
-                config={"recursion_limit": 80},
+                # Agent builds can legitimately run many tool/subagent turns:
+                # scaffold, write skills/files, test, fix, retest, deploy, and
+                # verify the live card. Keep this aligned with generated child
+                # agents so complex DeepAgents workflows have the same budget.
+                config={"recursion_limit": DEEPAGENTS_RECURSION_LIMIT},
             ):
                 kind = event.get("event")
                 tname = event.get("name") or ""