diff --git a/gateway/authz_mixin.py b/gateway/authz_mixin.py
index 86984913372b..f84ca259ccba 100644
--- a/gateway/authz_mixin.py
+++ b/gateway/authz_mixin.py
@@ -47,10 +47,14 @@ def _authorization_adapter(
         if not platform:
             return None
         profile_name = (profile or "").strip() or None
-        if profile_name:
+        if profile_name and profile_name != "default":
             profile_adapters = getattr(self, "_profile_adapters", None) or {}
             if profile_name in profile_adapters:
                 return profile_adapters[profile_name].get(platform)
+            # Fail closed: a stamped secondary profile with no registry entry
+            # (e.g. its adapter failed to connect) must NOT fall back to the
+            # default profile's adapter — that sends replies out the wrong bot.
+            return None
         adapters = getattr(self, "adapters", None) or {}
         return adapters.get(platform)
 
diff --git a/gateway/run.py b/gateway/run.py
index b81e87dba641..51e33ceb4996 100644
--- a/gateway/run.py
+++ b/gateway/run.py
@@ -5201,7 +5201,7 @@ async def _handle_active_session_busy_message(self, event: MessageEvent, session
                         "Approval response via plain text: session=%s verb=%s args=%r",
                         session_key, _verb, _normalized_args,
                     )
-                    _adapter = self.adapters.get(event.source.platform)
+                    _adapter = self._adapter_for_source(event.source)
                     if _adapter and _reply:
                         _text, _eph_ttl = _adapter._unwrap_ephemeral(_reply)
                         if _text:
@@ -6318,7 +6318,7 @@ async def _drain_startup_restore_queue(self) -> int:
         while queue:
             event = queue.pop(0)
             source = getattr(event, "source", None)
-            adapter = self.adapters.get(source.platform) if source is not None else None
+            adapter = self._adapter_for_source(source)
             if adapter is None:
                 logger.debug(
                     "Dropping startup-restore queued message: adapter unavailable for %s",
@@ -6424,7 +6424,7 @@ def _schedule_resume_pending_sessions(self, platform=None) -> int:
                 continue
 
             source = entry.origin
-            adapter = self.adapters.get(source.platform)
+            adapter = self._adapter_for_source(source)
             if adapter is None:
                 logger.debug(
                     "Skipping auto-resume for %s: adapter not ready for %s",
@@ -8595,7 +8595,7 @@ def check(
 
     async def _deliver_platform_notice(self, source, content: str) -> None:
         """Deliver a setup/operational notice using platform-specific privacy rules."""
-        adapter = self.adapters.get(source.platform)
+        adapter = self._adapter_for_source(source)
         if not adapter:
             return
 
@@ -9070,7 +9070,7 @@ async def _handle_message(self, event: MessageEvent) -> Optional[str]:
                 has_media = bool(getattr(event, "media_urls", None))
                 if not queued_text and not has_media:
                     return "Usage: /queue <prompt>"
-                adapter = self.adapters.get(source.platform)
+                adapter = self._adapter_for_source(source)
                 if adapter:
                     queued_event = MessageEvent(
                         text=queued_text,
@@ -9091,7 +9091,7 @@ async def _handle_message(self, event: MessageEvent) -> Optional[str]:
                         timestamp=event.timestamp,
                     )
                     self._enqueue_fifo(_quick_key, queued_event, adapter)
-                depth = self._queue_depth(_quick_key, adapter=self.adapters.get(source.platform))
+                depth = self._queue_depth(_quick_key, adapter=self._adapter_for_source(source))
                 if depth <= 1:
                     return "Queued for the next turn."
                 return f"Queued for the next turn. ({depth} queued)"
@@ -9108,7 +9108,7 @@ async def _handle_message(self, event: MessageEvent) -> Optional[str]:
                 running_agent = self._running_agents.get(_quick_key)
                 if running_agent is _AGENT_PENDING_SENTINEL:
                     # Agent hasn't started yet — queue as turn-boundary fallback.
-                    adapter = self.adapters.get(source.platform)
+                    adapter = self._adapter_for_source(source)
                     if adapter:
                         queued_event = MessageEvent(
                             text=steer_text,
@@ -9130,7 +9130,7 @@ async def _handle_message(self, event: MessageEvent) -> Optional[str]:
                         return f"⏩ Steer queued — arrives after the next tool call: '{preview}'"
                     return "Steer rejected (empty payload)."
                 # Running agent is missing or lacks steer() — fall back to queue.
-                adapter = self.adapters.get(source.platform)
+                adapter = self._adapter_for_source(source)
                 if adapter:
                     queued_event = MessageEvent(
                         text=steer_text,
@@ -9255,7 +9255,7 @@ async def _handle_message(self, event: MessageEvent) -> Optional[str]:
 
             if event.message_type == MessageType.PHOTO:
                 logger.debug("PRIORITY photo follow-up for session %s — queueing without interrupt", _quick_key)
-                adapter = self.adapters.get(source.platform)
+                adapter = self._adapter_for_source(source)
                 if adapter:
                     merge_pending_message_event(adapter._pending_messages, _quick_key, event)
                 return None
@@ -9276,7 +9276,7 @@ async def _handle_message(self, event: MessageEvent) -> Optional[str]:
                     time.time() - _started_at,
                     _quick_key,
                 )
-                adapter = self.adapters.get(source.platform)
+                adapter = self._adapter_for_source(source)
                 if adapter:
                     if self._busy_input_mode == "queue":
                         self._enqueue_fifo(_quick_key, event, adapter)
@@ -9299,7 +9299,7 @@ async def _handle_message(self, event: MessageEvent) -> Optional[str]:
                     return EphemeralReply("⚡ Force-stopped. The agent was still starting — session unlocked.")
                 # Queue the message so it will be picked up after the
                 # agent starts.
-                adapter = self.adapters.get(source.platform)
+                adapter = self._adapter_for_source(source)
                 if adapter:
                     merge_pending_message_event(
                         adapter._pending_messages,
@@ -9538,7 +9538,7 @@ async def _do_reset():
                 else "Learning a skill from this conversation…"
             )
             try:
-                adapter = self.adapters.get(source.platform)
+                adapter = self._adapter_for_source(source)
                 if adapter:
                     _ack_meta = self._thread_metadata_for_source(source)
                     await adapter.send(str(source.chat_id), _ack, metadata=_ack_meta)
@@ -9592,7 +9592,7 @@ async def _do_reset():
                 _ack = getattr(_blueprint_result, "text", "") or ""
                 if _ack:
                     try:
-                        adapter = self.adapters.get(source.platform)
+                        adapter = self._adapter_for_source(source)
                         if adapter:
                             _ack_meta = self._thread_metadata_for_source(source)
                             await adapter.send(str(source.chat_id), _ack, metadata=_ack_meta)
@@ -10219,7 +10219,7 @@ async def _prepare_inbound_message_text(
                 # while allowing quiet STT for users who only want the agent to
                 # receive the transcription.
                 if _successful_transcripts and self._should_echo_stt_transcripts():
-                    _echo_adapter = self.adapters.get(source.platform)
+                    _echo_adapter = self._adapter_for_source(source)
                     _echo_meta = self._thread_metadata_for_source(source, self._reply_anchor_for_event(event))
                     if _echo_adapter:
                         for _tx in _successful_transcripts:
@@ -10393,7 +10393,7 @@ async def _prepare_inbound_message_text(
                     allowed_root=_msg_cwd,
                 )
                 if _ctx_result.blocked:
-                    _adapter = self.adapters.get(source.platform)
+                    _adapter = self._adapter_for_source(source)
                     if _adapter:
                         await _adapter.send(
                             source.chat_id,
@@ -10634,7 +10634,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
                     and platform_name not in policy.notify_exclude_platforms
                 )
                 if should_notify:
-                    adapter = self.adapters.get(source.platform)
+                    adapter = self._adapter_for_source(source)
                     if adapter:
                         if reset_reason == "suspended":
                             reason_text = "previous session was stopped or interrupted"
@@ -11029,7 +11029,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
                                             "configuration."
                                         )
                                         try:
-                                            _adapter = self.adapters.get(source.platform)
+                                            _adapter = self._adapter_for_source(source)
                                             if _adapter and source.chat_id:
                                                 await _adapter.send(source.chat_id, _warn_msg, metadata=_hyg_meta)
                                         except Exception as _werr:
@@ -11053,7 +11053,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
                                             "check `auxiliary.compression.model` in config.yaml."
                                         )
                                         try:
-                                            _adapter = self.adapters.get(source.platform)
+                                            _adapter = self._adapter_for_source(source)
                                             if _adapter and source.chat_id:
                                                 await _adapter.send(source.chat_id, _aux_msg, metadata=_hyg_meta)
                                         except Exception as _werr:
@@ -11210,7 +11210,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
         # event so deferred post-delivery callbacks can be released by the
         # same run that registered them.
         self._bind_adapter_run_generation(
-            self.adapters.get(source.platform),
+            self._adapter_for_source(source),
             session_key,
             run_generation,
         )
@@ -11250,7 +11250,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
 
             # Stop persistent typing indicator now that the agent is done
             try:
-                _typing_adapter = self.adapters.get(source.platform)
+                _typing_adapter = self._adapter_for_source(source)
                 if _typing_adapter and hasattr(_typing_adapter, "stop_typing"):
                     await _typing_adapter.stop_typing(source.chat_id)
             except Exception:
@@ -11262,7 +11262,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
                     _quick_key or "?",
                     run_generation,
                 )
-                _stale_adapter = self.adapters.get(source.platform)
+                _stale_adapter = self._adapter_for_source(source)
                 if getattr(type(_stale_adapter), "pop_post_delivery_callback", None) is not None:
                     _stale_adapter.pop_post_delivery_callback(
                         _quick_key,
@@ -11772,7 +11772,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
             # users see the agent "stop responding without explanation."
             if agent_result.get("already_sent") and not agent_result.get("failed"):
                 if response:
-                    _media_adapter = self.adapters.get(source.platform)
+                    _media_adapter = self._adapter_for_source(source)
                     if _media_adapter:
                         await self._deliver_media_from_response(
                             response, event, _media_adapter,
@@ -11783,7 +11783,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
                 # still surface the runtime metadata on the final reply.
                 if _footer_line:
                     try:
-                        _foot_adapter = self.adapters.get(source.platform)
+                        _foot_adapter = self._adapter_for_source(source)
                         if _foot_adapter:
                             await _foot_adapter.send(
                                 source.chat_id,
@@ -11799,7 +11799,7 @@ async def _handle_message_with_agent(self, event, source, _quick_key: str, run_g
         except Exception as e:
             # Stop typing indicator on error too
             try:
-                _err_adapter = self.adapters.get(source.platform)
+                _err_adapter = self._adapter_for_source(source)
                 if _err_adapter and hasattr(_err_adapter, "stop_typing"):
                     await _err_adapter.stop_typing(source.chat_id)
             except Exception:
@@ -12304,7 +12304,7 @@ def _get_goal_manager_for_event(self, event: "MessageEvent"):
 
     async def _send_goal_status_notice(self, source: Any, message: str) -> None:
         """Send a /goal judge status line back to the originating chat/thread."""
-        adapter = self.adapters.get(source.platform)
+        adapter = self._adapter_for_source(source)
         if not adapter:
             logger.debug("goal continuation: no adapter for %s", getattr(source, "platform", None))
             return
@@ -12331,7 +12331,7 @@ async def _defer_goal_status_notice_after_delivery(self, source: Any, message: s
         exactly this boundary; when unavailable, fall back to direct awaited
         delivery rather than silently dropping the notice.
         """
-        adapter = self.adapters.get(source.platform)
+        adapter = self._adapter_for_source(source)
         if not adapter:
             logger.debug("goal continuation: no adapter for %s", getattr(source, "platform", None))
             return
@@ -12429,7 +12429,7 @@ async def _post_turn_goal_continuation(
         # Enqueue via the adapter's FIFO so a user message already in
         # flight preempts the continuation naturally.
         try:
-            adapter = self.adapters.get(source.platform)
+            adapter = self._adapter_for_source(source)
             _quick_key = self._session_key_for_source(source)
             if adapter and _quick_key:
                 cont_event = MessageEvent(
@@ -12462,7 +12462,7 @@ def _get_guild_id(event: MessageEvent) -> Optional[int]:
 
     async def _handle_voice_channel_join(self, event: MessageEvent) -> str:
         """Join the user's current Discord voice channel."""
-        adapter = self.adapters.get(event.source.platform)
+        adapter = self._adapter_for_source(event.source)
         if not hasattr(adapter, "join_voice_channel"):
             return "Voice channels are not supported on this platform."
 
@@ -12519,7 +12519,7 @@ async def _handle_voice_channel_join(self, event: MessageEvent) -> str:
 
     async def _handle_voice_channel_leave(self, event: MessageEvent) -> str:
         """Leave the Discord voice channel."""
-        adapter = self.adapters.get(event.source.platform)
+        adapter = self._adapter_for_source(event.source)
         guild_id = self._get_guild_id(event)
 
         if not guild_id or not hasattr(adapter, "leave_voice_channel"):
@@ -12753,7 +12753,7 @@ async def _send_voice_reply(self, event: MessageEvent, text: str) -> None:
                 logger.warning("Auto voice reply TTS failed: %s", result.get("error"))
                 return
 
-            adapter = self.adapters.get(event.source.platform)
+            adapter = self._adapter_for_source(event.source)
 
             # If connected to a voice channel, play there instead of sending a file
             guild_id = self._get_guild_id(event)
@@ -12931,7 +12931,7 @@ async def _run_background_task(
         media_urls = media_urls or []
         media_types = media_types or []
 
-        adapter = self.adapters.get(source.platform)
+        adapter = self._adapter_for_source(source)
         if not adapter:
             logger.warning("No adapter for platform %s in background task %s", source.platform, task_id)
             return
@@ -13126,7 +13126,7 @@ def run_sync():
 
     async def _get_telegram_topic_capabilities(self, source: SessionSource) -> dict:
         """Read Telegram private-topic capability flags via Bot API getMe."""
-        adapter = self.adapters.get(source.platform) if getattr(self, "adapters", None) else None
+        adapter = self._adapter_for_source(source)
         bot = getattr(adapter, "_bot", None)
         if bot is None or not hasattr(bot, "get_me"):
             return {"checked": False}
@@ -13154,7 +13154,7 @@ def _field(name: str):
 
     async def _ensure_telegram_system_topic(self, source: SessionSource) -> None:
         """Create/pin the managed System topic after /topic activation when possible."""
-        adapter = self.adapters.get(source.platform) if getattr(self, "adapters", None) else None
+        adapter = self._adapter_for_source(source)
         if adapter is None or not source.chat_id:
             return
 
@@ -13195,7 +13195,7 @@ async def _ensure_telegram_system_topic(self, source: SessionSource) -> None:
 
     async def _send_telegram_topic_setup_image(self, source: SessionSource) -> None:
         """Send the bundled BotFather Threads Settings screenshot when available."""
-        adapter = self.adapters.get(source.platform) if getattr(self, "adapters", None) else None
+        adapter = self._adapter_for_source(source)
         if adapter is None or not source.chat_id or not hasattr(adapter, "send_image_file"):
             return
         image_path = Path(__file__).resolve().parent / "assets" / "telegram-botfather-threads-settings.jpg"
@@ -13247,7 +13247,7 @@ async def _rename_telegram_topic_for_session_title(
         # Check the class, not the instance — getattr() on MagicMock
         # auto-creates attributes, so `hasattr(adapter, "_get_dm_topic_info")`
         # would return True for every test double.
-        adapter = self.adapters.get(source.platform) if getattr(self, "adapters", None) else None
+        adapter = self._adapter_for_source(source)
         if adapter is not None:
             get_info = getattr(type(adapter), "_get_dm_topic_info", None)
             if callable(get_info):
@@ -13806,7 +13806,7 @@ async def _request_slash_confirm(
         # cannot race the send_slash_confirm return.
         _slash_confirm_mod.register(session_key, confirm_id, command, handler)
 
-        adapter = self.adapters.get(source.platform)
+        adapter = self._adapter_for_source(source)
         metadata = self._thread_metadata_for_source(source, self._reply_anchor_for_event(event))
 
         used_buttons = False
@@ -14820,7 +14820,7 @@ async def _dequeue_pending_with_transcription(
             # Echo raw transcripts back to the user when configured so voice
             # interrupts feel identical to fresh voice messages.
             if successful_transcripts and self._should_echo_stt_transcripts():
-                echo_adapter = self.adapters.get(source.platform)
+                echo_adapter = self._adapter_for_source(source)
                 echo_meta = {"thread_id": source.thread_id} if source.thread_id else None
                 if echo_adapter:
                     for tx in successful_transcripts:
@@ -15642,7 +15642,7 @@ async def _interrupt_and_clear_session(
         if running_agent and running_agent is not _AGENT_PENDING_SENTINEL:
             running_agent.interrupt(interrupt_reason)
         self._invalidate_session_run_generation(session_key, reason=invalidation_reason)
-        adapter = self.adapters.get(source.platform)
+        adapter = self._adapter_for_source(source)
         if adapter and hasattr(adapter, "interrupt_session_activity"):
             await adapter.interrupt_session_activity(session_key, source.chat_id)
         if adapter and hasattr(adapter, "get_pending_message"):
@@ -16207,7 +16207,7 @@ def _run_still_current() -> bool:
         if _streaming_enabled:
             try:
                 from gateway.stream_consumer import GatewayStreamConsumer, StreamConsumerConfig
-                _adapter = self.adapters.get(source.platform)
+                _adapter = self._adapter_for_source(source)
                 if _adapter:
                     _pause_typing_before_finalize = None
                     if source.platform == Platform.TELEGRAM and hasattr(_adapter, "pause_typing_for_chat"):
@@ -16258,7 +16258,7 @@ def _pause_typing_before_finalize(
             stream_task = asyncio.create_task(_stream_consumer.run())
 
         # Send typing indicator
-        _adapter = self.adapters.get(source.platform)
+        _adapter = self._adapter_for_source(source)
         if _adapter:
             try:
                 await _adapter.send_typing(source.chat_id, metadata=_thread_metadata)
@@ -16698,7 +16698,7 @@ def voice_ack_callback(call_id, tool_name, args):
         _cleanup_progress = bool(
             resolve_display_setting(user_config, platform_key, "cleanup_progress")
         )
-        _cleanup_adapter = self.adapters.get(source.platform) if _cleanup_progress else None
+        _cleanup_adapter = self._adapter_for_source(source) if _cleanup_progress else None
         if _cleanup_adapter is not None and (
             type(_cleanup_adapter).delete_message is BasePlatformAdapter.delete_message
         ):
@@ -16819,7 +16819,7 @@ def progress_callback(event_type: str, tool_name: str = None, preview: str = Non
             _code_block_full = None
             _code_block_short = None
             try:
-                _progress_adapter = self.adapters.get(source.platform)
+                _progress_adapter = self._adapter_for_source(source)
             except Exception:
                 _progress_adapter = None
             if (
@@ -17009,7 +17009,7 @@ async def send_progress_messages():
             if not progress_queue:
                 return
 
-            adapter = self.adapters.get(source.platform)
+            adapter = self._adapter_for_source(source)
             if not adapter:
                 return
 
@@ -17384,7 +17384,7 @@ def _event_callback_sync(event_type: str, context: dict) -> None:
                 logger.debug("event_callback hook error: %s", _e)
 
         # Bridge sync status_callback → async adapter.send for context pressure
-        _status_adapter = self.adapters.get(source.platform)
+        _status_adapter = self._adapter_for_source(source)
         _status_chat_id = source.chat_id
         if source.platform == Platform.FEISHU and source.thread_id and event_message_id:
             # Feishu topics only keep messages inside the topic when they are
@@ -17530,7 +17530,7 @@ def run_sync():
             if _want_stream_deltas or _want_interim_consumer:
                 try:
                     from gateway.stream_consumer import GatewayStreamConsumer, StreamConsumerConfig
-                    _adapter = self.adapters.get(source.platform)
+                    _adapter = self._adapter_for_source(source)
                     if _adapter:
                         _pause_typing_before_finalize = None
                         if source.platform == Platform.TELEGRAM and hasattr(_adapter, "pause_typing_for_chat"):
@@ -18698,7 +18698,7 @@ async def monitor_for_interrupt():
                 try:
                     # Re-resolve adapter each iteration so reconnects don't
                     # leave us holding a stale reference.
-                    _adapter = self.adapters.get(source.platform)
+                    _adapter = self._adapter_for_source(source)
                     if not _adapter:
                         continue
                     # Check if adapter has a pending interrupt for this session.
@@ -18793,7 +18793,7 @@ async def monitor_for_interrupt():
         async def _notify_long_running():
             if _NOTIFY_INTERVAL is None:
                 return  # Notifications disabled (gateway_notify_interval: 0)
-            _notify_adapter = self.adapters.get(source.platform)
+            _notify_adapter = self._adapter_for_source(source)
             if not _notify_adapter:
                 return
             # Track the heartbeat message id so we can edit-in-place on
@@ -18938,7 +18938,7 @@ def _stream_confirmed_final_delivery(
                     # Backup interrupt check: if the monitor task died or
                     # missed the interrupt, catch it here.
                     if not _interrupt_detected.is_set() and session_key:
-                        _backup_adapter = self.adapters.get(source.platform)
+                        _backup_adapter = self._adapter_for_source(source)
                         _backup_agent = agent_holder[0]
                         if (_backup_adapter and _backup_agent
                                 and hasattr(_backup_adapter, 'has_pending_interrupt')
@@ -18978,7 +18978,7 @@ def _stream_confirmed_final_delivery(
                     if (not _warning_fired and _agent_warning is not None
                             and _idle_secs >= _agent_warning):
                         _warning_fired = True
-                        _warn_adapter = self.adapters.get(source.platform)
+                        _warn_adapter = self._adapter_for_source(source)
                         if _warn_adapter:
                             _elapsed_warn = int(_agent_warning // 60) or 1
                             _remaining_mins = int((_agent_timeout - _agent_warning) // 60) or 1
@@ -18998,7 +18998,7 @@ def _stream_confirmed_final_delivery(
                         break
                     # Backup interrupt check (same as unlimited path).
                     if not _interrupt_detected.is_set() and session_key:
-                        _backup_adapter = self.adapters.get(source.platform)
+                        _backup_adapter = self._adapter_for_source(source)
                         _backup_agent = agent_holder[0]
                         if (_backup_adapter and _backup_agent
                                 and hasattr(_backup_adapter, 'has_pending_interrupt')
@@ -19115,7 +19115,7 @@ def _stream_confirmed_final_delivery(
 
             # Check if we were interrupted OR have a queued message (/queue).
             result = result_holder[0]
-            adapter = self.adapters.get(source.platform)
+            adapter = self._adapter_for_source(source)
             
             # Get pending message from adapter.
             # Use session_key (not source.chat_id) to match adapter's storage keys.
@@ -19246,7 +19246,7 @@ def _stream_confirmed_final_delivery(
                         "queueing message instead of recursing.",
                         _interrupt_depth, session_key,
                     )
-                    adapter = self.adapters.get(source.platform)
+                    adapter = self._adapter_for_source(source)
                     if adapter and pending_event:
                         merge_pending_message_event(adapter._pending_messages, session_key, pending_event)
                     elif adapter and hasattr(adapter, 'queue_message'):
@@ -19365,7 +19365,7 @@ def _stream_confirmed_final_delivery(
                 # Restart typing indicator so the user sees activity while
                 # the follow-up turn runs.  The outer _process_message_background
                 # typing task is still alive but may be stale.
-                _followup_adapter = self.adapters.get(source.platform)
+                _followup_adapter = self._adapter_for_source(source)
                 if _followup_adapter:
                     try:
                         await _followup_adapter.send_typing(
diff --git a/scripts/release.py b/scripts/release.py
index 39ef393836a8..dca7e8d8780e 100755
--- a/scripts/release.py
+++ b/scripts/release.py
@@ -46,6 +46,8 @@
 # Auto-extracted from noreply emails + manual overrides
 AUTHOR_MAP = {
     "derek2000139@qq.com": "derek2000139",  # PR #57838 salvage (desktop/windows: pre-write update marker before quit dwell so the renderer's waitForUpdateToFinish gate parks instead of respawning a backend that re-locks venv .pyd files mid-update)
+    "AndreasHiltner@users.noreply.github.com": "AndreasHiltner",  # PR #56854 salvage (gateway: route multiplex profile responses through the profile's own adapter — 53-site _adapter_for_source sweep)
+    "m888.braun@hotmail.com": "ManniBr",  # PR #57417 partial salvage (gateway: fail-closed adapter resolution for unregistered secondary profiles)
     "jashlee+microsoft@microsoft.com": "s905060",  # PR #57943 salvage (photon: auto-reinstall stale sidecar node_modules when lockfile is newer than npm's install marker; #59169)
     "lohinth25@proton.me": "l0h1nth",  # PR #32210 salvage (mattermost: accept leading-space slash commands from mobile clients; #25184)
     "perkintahmaz50@gmail.com": "devatnull",  # PR #58704 salvage (whatsapp: native Baileys polls, clarify-as-poll, location pins, structured quoted replies, PTT/audio split, bridge_helpers extraction)
diff --git a/tests/gateway/test_notice_rendering.py b/tests/gateway/test_notice_rendering.py
index 89a5435a507a..3ba731f32e41 100644
--- a/tests/gateway/test_notice_rendering.py
+++ b/tests/gateway/test_notice_rendering.py
@@ -107,6 +107,10 @@ def _make_source(platform_value="telegram", chat_id="555", user_id="u1"):
     src.platform = plat
     src.chat_id = chat_id
     src.user_id = user_id
+    # Real SessionSource.profile is None (single-profile) or a str; a MagicMock
+    # auto-attribute would read as a truthy "stamped profile" and trip the
+    # fail-closed path in _adapter_for_source (see AGENTS.md pitfall #17).
+    src.profile = None
     return src
 
 
diff --git a/tests/gateway/test_queue_consumption.py b/tests/gateway/test_queue_consumption.py
index ec1b0dedc83d..857da98da71c 100644
--- a/tests/gateway/test_queue_consumption.py
+++ b/tests/gateway/test_queue_consumption.py
@@ -382,7 +382,9 @@ def _make_runner_and_adapter(self):
         return runner, adapter
 
     def _text_event(self, text: str) -> MessageEvent:
-        source = MagicMock(chat_id="c1", platform=Platform.TELEGRAM)
+        # profile=None: a MagicMock auto-attribute reads as a truthy stamped
+        # profile and trips fail-closed adapter resolution (AGENTS.md #17).
+        source = MagicMock(chat_id="c1", platform=Platform.TELEGRAM, profile=None)
         return MessageEvent(
             text=text,
             message_type=MessageType.TEXT,
@@ -433,7 +435,7 @@ def test_photo_burst_still_merges_in_head_slot(self):
         runner, adapter = self._make_runner_and_adapter()
         session_key = "telegram:user:burst"
 
-        source = MagicMock(chat_id="c1", platform=Platform.TELEGRAM)
+        source = MagicMock(chat_id="c1", platform=Platform.TELEGRAM, profile=None)
         for i in range(3):
             runner._queue_or_replace_pending_event(
                 session_key,