M3 implementada e backlog atualizado

RI/src/emcp_bus/agent_runtime/channels/conversational.py

@@ -0,0 +1,31 @@
+"""Conversational channel adapter (EP-12-T02, README.md §3.3, §6.13).
+
+The one concrete channel adapter this RI demonstrates -- formats a dispatch
+result as a conversational message for the `app` channel. A production
+deployment would add adapters for push/media/campaign channels the same
+way, each registered under its own `channel` value in a `ChannelRegistry`,
+without changing `AgentDispatcher` (EP-12-T01) at all.
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from emcp_bus.agent_runtime.dispatcher import DispatchResult
+from emcp_bus.orchestrator.nba_model import NBADecision
+
+
+class ConversationalChannelAdapter:
+    channel = "app"
+
+    async def deliver(self, nba: NBADecision, dispatch_result: DispatchResult) -> dict[str, Any]:
+        if dispatch_result.status == "denied":
+            message = f"I wasn't able to complete {nba.action} right now."
+        else:
+            message = f"Done: {nba.action} completed successfully."
+        return {
+            "channel": self.channel,
+            "decision_id": nba.decision_id,
+            "message": message,
+            "status": dispatch_result.status,
+        }