feat: initial bootstrap — structure, task_brief, blackboard, adapter bases, escalation, prompts

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

adapters/base/notify.py

@@ -0,0 +1,21 @@
+"""
+adapters/base/notify.py
+Abstract base class for all notification adapters.
+"""
+from abc import ABC, abstractmethod
+
+
+class NotifyAdapter(ABC):
+    """Contract that every notification provider adapter must fulfil."""
+
+    @abstractmethod
+    def send(self, message: str, context: dict) -> None:
+        """
+        Dispatch a notification.
+
+        Parameters
+        ----------
+        message : Human-readable message text.
+        context : Arbitrary metadata (e.g. channel, severity, run_id, brief_id).
+        """
+        ...