fix(gateway/bluebubbles): align iMessage delivery with non-editable UX

gateway/platforms/bluebubbles.py

@@ -99,6 +99,7 @@ def _normalize_server_url(raw: str) -> str:
 
 class BlueBubblesAdapter(BasePlatformAdapter):
     platform = Platform.BLUEBUBBLES
+    SUPPORTS_MESSAGE_EDITING = False
     MAX_MESSAGE_LENGTH = MAX_TEXT_LENGTH
 
     def __init__(self, config: PlatformConfig):
@@ -391,6 +392,13 @@ class BlueBubblesAdapter(BasePlatformAdapter):
     # Text sending
     # ------------------------------------------------------------------
 
+    @staticmethod
+    def truncate_message(content: str, max_length: int = MAX_TEXT_LENGTH) -> List[str]:
+        # Use the base splitter but skip pagination indicators — iMessage
+        # bubbles flow naturally without "(1/3)" suffixes.
+        chunks = BasePlatformAdapter.truncate_message(content, max_length)
+        return [re.sub(r"\s*\(\d+/\d+\)$", "", c) for c in chunks]
+
     async def send(
         self,
         chat_id: str,
@@ -398,10 +406,19 @@ class BlueBubblesAdapter(BasePlatformAdapter):
         reply_to: Optional[str] = None,
         metadata: Optional[Dict[str, Any]] = None,
     ) -> SendResult:
-        text = strip_markdown(content or "")
+        text = self.format_message(content)
         if not text:
             return SendResult(success=False, error="BlueBubbles send requires text")
-        chunks = self.truncate_message(text, max_length=self.MAX_MESSAGE_LENGTH)
+        # Split on paragraph breaks first (double newlines) so each thought
+        # becomes its own iMessage bubble, then truncate any that are still
+        # too long.
+        paragraphs = [p.strip() for p in re.split(r'\n\s*\n', text) if p.strip()]
+        chunks: List[str] = []
+        for para in (paragraphs or [text]):
+            if len(para) <= self.MAX_MESSAGE_LENGTH:
+                chunks.append(para)
+            else:
+                chunks.extend(self.truncate_message(para, max_length=self.MAX_MESSAGE_LENGTH))
         last = SendResult(success=True)
         for chunk in chunks:
             guid = await self._resolve_chat_guid(chat_id)

gateway/session.py

@@ -285,6 +285,18 @@ def build_session_context_prompt(
             "Do not promise to perform these actions. If the user asks, explain "
             "that you can only read messages sent directly to you and respond."
         )
+    elif context.source.platform == Platform.BLUEBUBBLES:
+        lines.append("")
+        lines.append(
+            "**Platform notes:** You are responding via iMessage. "
+            "Keep responses short and conversational — think texts, not essays. "
+            "Structure longer replies as separate short thoughts, each separated "
+            "by a blank line (double newline). Each block between blank lines "
+            "will be delivered as its own iMessage bubble, so write accordingly: "
+            "one idea per bubble, 1–3 sentences each. "
+            "If the user needs a detailed answer, give the short version first "
+            "and offer to elaborate."
+        )
 
     # Connected platforms
     platforms_list = ["local (files on this machine)"]