google styled doc

mail_intake/credentials/store.py

@@ -1,6 +1,10 @@
 """
 Credential persistence abstractions for Mail Intake.
 
+---
+
+## Summary
+
 This module defines the generic persistence contract used to store and
 retrieve authentication credentials across Mail Intake components.
 
@@ -29,16 +33,18 @@ class CredentialStore(ABC, Generic[T]):
     Abstract base class defining a generic persistence interface for
     authentication credentials.
 
-    This interface separates *credential lifecycle management* from
-    *credential storage mechanics*. Implementations are responsible
-    only for persistence concerns, while authentication providers
-    retain full control over credential creation, validation, refresh,
-    and revocation logic.
+    Notes:
+        **Responsibilities:**
 
-    The store is intentionally agnostic to:
-    - The concrete credential type being stored
-    - The serialization format used to persist credentials
-    - The underlying storage backend or durability guarantees
+            - Provide persistent storage separating life-cycle management from storage mechanics
+            - Keep implementation focused only on persistence
+            
+        **Constraints:**
+        
+            - The store is intentionally agnostic to:
+                - The concrete credential type being stored
+                - The serialization format used to persist credentials
+                - The underlying storage backend or durability guarantees
     """
 
     @abstractmethod
@@ -46,16 +52,16 @@ class CredentialStore(ABC, Generic[T]):
         """
         Load previously persisted credentials.
 
-        Implementations should return ``None`` when no credentials are
-        present or when stored credentials cannot be successfully
-        decoded or deserialized.
-
-        The store must not attempt to validate, refresh, or otherwise
-        interpret the returned credentials.
-
         Returns:
-            An instance of type ``T`` if credentials are available and
-            loadable; otherwise ``None``.
+            Optional[T]:
+                An instance of type ``T`` if credentials are available and
+                loadable; otherwise ``None``.
+
+        Notes:
+            **Guarantees:**
+
+                - Implementations should return ``None`` when no credentials are present or when stored credentials cannot be successfully decoded or deserialized
+                - The store must not attempt to validate, refresh, or otherwise interpret the returned credentials
         """
 
     @abstractmethod
@@ -63,18 +69,20 @@ class CredentialStore(ABC, Generic[T]):
         """
         Persist credentials to the underlying storage backend.
 
-        This method is invoked when credentials are newly obtained or
-        have been refreshed and are known to be valid at the time of
-        persistence.
-
-        Implementations are responsible for:
-        - Ensuring durability appropriate to the deployment context
-        - Applying encryption or access controls where required
-        - Overwriting any previously stored credentials
-
         Args:
-            credentials:
+            credentials (T):
                 The credential object to persist.
+
+        Notes:
+            **Lifecycle:**
+
+                - This method is invoked when credentials are newly obtained or have been refreshed and are known to be valid at the time of persistence
+
+            **Responsibilities:**
+
+                - Ensuring durability appropriate to the deployment context
+                - Applying encryption or access controls where required
+                - Overwriting any previously stored credentials
         """
 
     @abstractmethod
@@ -82,9 +90,13 @@ class CredentialStore(ABC, Generic[T]):
         """
         Remove any persisted credentials from the store.
 
-        This method is called when credentials are known to be invalid,
-        revoked, corrupted, or otherwise unusable, and must ensure that
-        no stale authentication material remains accessible.
+        Notes:
+            **Lifecycle:**
 
-        Implementations should treat this operation as idempotent.
+                - This method is called when credentials are known to be invalid, revoked, corrupted, or otherwise unusable
+                - Must ensure that no stale authentication material remains accessible
+
+            **Guarantees:**
+
+                - Implementations should treat this operation as idempotent
         """