Fix quota side-agent handoff projection

examples/quota-plan-smoke.py

@@ -1669,8 +1669,9 @@ def assert_goal_boundary_in_should_run() -> None:
                     "production-action",
                     "managed-mirror-sync",
                 ],
-                "registered_agents": ["codex-main-control", "codex-side-bypass"],
+                "registered_agents": ["codex-main-control", "codex-side-bypass", "codex-side-reviewer"],
                 "primary_agent": "codex-main-control",
+                "side_agent_handoff_agent": "codex-side-reviewer",
             },
             "spawn_policy": {
                 "mode": "multi_subagent",
@@ -1724,8 +1725,12 @@ def assert_goal_boundary_in_should_run() -> None:
     assert "- automation_prompt_upgrade: required=True blocks_should_run=True" in markdown, markdown
     assert side_agent_decision["agent_identity"]["agent_id"] == "codex-side-bypass", side_agent_decision
     assert side_agent_decision["agent_identity"]["role"] == "side-agent", side_agent_decision
+    assert side_agent_decision["agent_identity"]["handoff_agent"] == "codex-side-reviewer", side_agent_decision
     assert "automation_prompt_upgrade" not in side_agent_decision, side_agent_decision
-    assert "agent_identity: agent_id=codex-side-bypass role=side-agent" in side_agent_markdown, side_agent_markdown
+    assert (
+        "agent_identity: agent_id=codex-side-bypass role=side-agent "
+        "primary_agent=codex-main-control handoff_agent=codex-side-reviewer"
+    ) in side_agent_markdown, side_agent_markdown
     assert boundary["adapter"]["status"] == "connected-delivery", boundary
     assert boundary["write_scope"] == ["docs/design/**", "src/agent_harness/**", "tests/**"], boundary
     assert "production-action" in boundary["requires_parent_approval"], boundary

loopx/agent_registry.py

@@ -3,7 +3,6 @@
 from pathlib import Path
 from typing import Any
 
-from .registry import read_json, registry_goals
 from .todo_contract import normalize_todo_claimed_by
 
 
@@ -127,6 +126,8 @@ def agent_profile_for_goal(goal: dict[str, Any] | None, agent_id: str | None) ->
 
 
 def load_goal_from_registry(registry_path: Path, goal_id: str) -> dict[str, Any] | None:
+    from .registry import read_json, registry_goals
+
     if not registry_path.exists():
         return None
     registry = read_json(registry_path)

loopx/quota.py

@@ -11,6 +11,7 @@
 from pathlib import Path
 from typing import Any
 
+from .agent_registry import side_agent_handoff_agent_id_for_goal
 from .benchmark_core import compact_run_permission_policy_for_quota
 from .boundary_authority import checkpointed_boundary_authority_summary
 from .control_plane import (
@@ -4428,11 +4429,19 @@ def _quota_agent_identity(goal: dict[str, Any], *, agent_id: str | None) -> dict
             f"registered_agents={', '.join(registered_agents)}"
         )
     primary_agent = _quota_primary_agent(goal)
+    handoff_agent = side_agent_handoff_agent_id_for_goal(goal, agent_id=normalized_agent_id)
+    if handoff_agent:
+        if handoff_agent not in registered_agents:
+            raise ValueError(
+                f"side_agent_handoff_agent={handoff_agent!r} is not registered; "
+                f"registered_agents={', '.join(registered_agents)}"
+            )
     return {
         "agent_id": normalized_agent_id,
         "registered": True,
         "role": "primary-agent" if primary_agent and normalized_agent_id == primary_agent else "side-agent",
         "primary_agent": primary_agent,
+        "handoff_agent": handoff_agent,
         "registered_agents": registered_agents,
     }
 
@@ -8307,7 +8316,8 @@ def render_quota_should_run_markdown(payload: dict[str, Any]) -> str:
             "- agent_identity: "
             f"agent_id={agent_identity.get('agent_id')} "
             f"role={agent_identity.get('role')} "
-            f"primary_agent={agent_identity.get('primary_agent')}"
+            f"primary_agent={agent_identity.get('primary_agent')} "
+            f"handoff_agent={agent_identity.get('handoff_agent')}"
         )
     if payload.get("active_state_next_action"):
         lines.append(f"- active_state_next_action: {payload.get('active_state_next_action')}")