重构 改为标准化输出

backend/app/cad_agent/adapters/event_publisher.py

@@ -0,0 +1,28 @@
+"""In-process idempotent event delivery for the v3 delivery boundary."""
+
+from __future__ import annotations
+
+from copy import deepcopy
+from typing import Any
+
+
+class IdempotentInProcessPublisher:
+    """A small delivery adapter with durable-outbox compatible semantics.
+
+    The process-local sink is intentionally only a delivery mechanism: SQLite
+    remains the durable event source.  The event ID is retained so a later
+    durable broker/websocket adapter can make the same idempotency guarantee.
+    """
+
+    def __init__(self) -> None:
+        self._seen_event_ids: set[int] = set()
+        self.delivered: list[dict[str, Any]] = []
+
+    async def publish(self, event: dict[str, Any]) -> None:
+        event_id = event.get("event_id")
+        if not isinstance(event_id, int):
+            raise ValueError("Published outbox event has no integer event_id")
+        if event_id in self._seen_event_ids:
+            return
+        self._seen_event_ids.add(event_id)
+        self.delivered.append(deepcopy(event))