diff --git a/pyproject.toml b/pyproject.toml
index 4296774..e2ce4aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "pytest-codingagents"
-version = "0.2.2"
+version = "0.2.3"
 description = "Pytest plugin for testing real coding agents via their SDK"
 readme = "README.md"
 license = { text = "MIT" }
diff --git a/src/pytest_codingagents/copilot/personas.py b/src/pytest_codingagents/copilot/personas.py
index 92632e2..f5e2979 100644
--- a/src/pytest_codingagents/copilot/personas.py
+++ b/src/pytest_codingagents/copilot/personas.py
@@ -278,6 +278,12 @@ def _build_agents_block(custom_agents: list[dict[str, Any]], tool_name: str = "r
             "appropriate agent from this list."
         ),
         f"Use the {tool_name} tool with the agent name to run the subagent.",
+        (
+            f"You are an orchestrator. All task work must be delegated to "
+            f"subagents via the `{tool_name}` tool. "
+            f"Do not implement, edit files, or perform task work directly — "
+            f"delegate every phase of work to the appropriate subagent."
+        ),
     ]
     for a in custom_agents:
         lines.append("<agent>")