fix(runtime): preserve resolved fork metadata

tests/tools/test_delegate.py

@@ -1265,6 +1265,24 @@ class TestDelegationCredentialResolution(unittest.TestCase):
             requested="crof.ai", target_model="deepseek-v4-pro-CEER"
         )
 
+    @patch("hermes_cli.runtime_provider.resolve_runtime_provider")
+    def test_provider_forwards_runtime_request_overrides_and_output_cap(self, mock_resolve):
+        mock_resolve.return_value = {
+            "provider": "custom",
+            "model": "real-model",
+            "base_url": "https://gateway.example/v1",
+            "api_key": "gateway-key",
+            "api_mode": "chat_completions",
+            "request_overrides": {"extra_body": {"store": False}},
+            "max_output_tokens": 3072,
+        }
+        creds = _resolve_delegation_credentials(
+            {"model": "real-model", "provider": "gateway"},
+            _make_mock_parent(depth=0),
+        )
+        self.assertEqual(creds["request_overrides"], {"extra_body": {"store": False}})
+        self.assertEqual(creds["max_output_tokens"], 3072)
+
     @patch("hermes_cli.runtime_provider.resolve_runtime_provider")
     def test_standard_provider_not_overwritten_by_configured_name(self, mock_resolve):
         """Standard (non-custom) providers must still return runtime identity,

tools/delegate_tool.py

@@ -1055,6 +1055,8 @@ def _build_child_agent(
     override_base_url: Optional[str] = None,
     override_api_key: Optional[str] = None,
     override_api_mode: Optional[str] = None,
+    override_request_overrides: Optional[Dict[str, Any]] = None,
+    override_max_tokens: Optional[int] = None,
     # ACP transport overrides from trusted delegation config.
     override_acp_command: Optional[str] = None,
     override_acp_args: Optional[List[str]] = None,
@@ -1306,6 +1308,15 @@ def _build_child_agent(
         # openrouter/pareto-code), so we keep it inherited even when the
         # provider is overridden — it's a no-op on any other model.
 
+    child_max_tokens = (
+        override_max_tokens
+        if override_max_tokens is not None
+        else getattr(parent_agent, "max_tokens", None)
+    )
+    child_optional_kwargs: Dict[str, Any] = {}
+    if isinstance(child_max_tokens, int):
+        child_optional_kwargs["max_tokens"] = child_max_tokens
+
     child = AIAgent(
         base_url=effective_base_url,
         api_key=effective_api_key,
@@ -1315,7 +1326,7 @@ def _build_child_agent(
         acp_command=effective_acp_command,
         acp_args=effective_acp_args,
         max_iterations=max_iterations,
-        max_tokens=getattr(parent_agent, "max_tokens", None),
+
         reasoning_config=child_reasoning,
         prefill_messages=getattr(parent_agent, "prefill_messages", None),
         fallback_model=parent_fallback,
@@ -1336,9 +1347,15 @@ def _build_child_agent(
         provider_sort=child_provider_sort,
         provider_require_parameters=child_provider_require_parameters,
         provider_data_collection=child_provider_data_collection,
+        request_overrides=(
+            dict(override_request_overrides or {})
+            if override_provider
+            else dict(getattr(parent_agent, "request_overrides", {}) or {})
+        ),
         openrouter_min_coding_score=child_openrouter_min_coding_score,
         tool_progress_callback=child_progress_cb,
         iteration_budget=None,  # fresh budget per subagent
+        **child_optional_kwargs,
     )
     child._print_fn = getattr(parent_agent, "_print_fn", None)
     # Now the child exists, its session id can ride on every relayed event
@@ -2510,6 +2527,8 @@ def delegate_task(
                 override_base_url=creds["base_url"],
                 override_api_key=creds["api_key"],
                 override_api_mode=creds["api_mode"],
+                override_request_overrides=creds.get("request_overrides"),
+                override_max_tokens=creds.get("max_output_tokens"),
                 override_acp_command=creds.get("command"),
                 override_acp_args=creds.get("args"),
                 role=effective_role,
@@ -3096,6 +3115,8 @@ def _resolve_delegation_credentials(cfg: dict, parent_agent) -> dict:
             "base_url": None,
             "api_key": None,
             "api_mode": None,
+            "request_overrides": None,
+            "max_output_tokens": None,
         }
 
     # Provider is configured — resolve full credentials
@@ -3124,6 +3145,8 @@ def _resolve_delegation_credentials(cfg: dict, parent_agent) -> dict:
         "base_url": runtime.get("base_url"),
         "api_key": api_key,
         "api_mode": runtime.get("api_mode"),
+        "request_overrides": dict(runtime.get("request_overrides") or {}),
+        "max_output_tokens": runtime.get("max_output_tokens"),
         "command": runtime.get("command"),
         "args": list(runtime.get("args") or []),
     }