diff --git a/gateway/platforms/base.py b/gateway/platforms/base.py
index 67ecb51d5c..8c43c9006e 100644
--- a/gateway/platforms/base.py
+++ b/gateway/platforms/base.py
@@ -294,6 +294,7 @@ class MessageEvent:
     
     # Reply context
     reply_to_message_id: Optional[str] = None
+    reply_to_text: Optional[str] = None  # Text of the replied-to message (for context injection)
     
     # Timestamps
     timestamp: datetime = field(default_factory=datetime.now)
diff --git a/gateway/platforms/telegram.py b/gateway/platforms/telegram.py
index cec1d7b685..b4ef75f8ec 100644
--- a/gateway/platforms/telegram.py
+++ b/gateway/platforms/telegram.py
@@ -1185,11 +1185,20 @@ class TelegramAdapter(BasePlatformAdapter):
             thread_id=str(message.message_thread_id) if message.message_thread_id else None,
         )
         
+        # Extract reply context if this message is a reply
+        reply_to_id = None
+        reply_to_text = None
+        if message.reply_to_message:
+            reply_to_id = str(message.reply_to_message.message_id)
+            reply_to_text = message.reply_to_message.text or message.reply_to_message.caption or None
+
         return MessageEvent(
             text=message.text or "",
             message_type=msg_type,
             source=source,
             raw_message=message,
             message_id=str(message.message_id),
+            reply_to_message_id=reply_to_id,
+            reply_to_text=reply_to_text,
             timestamp=message.date,
         )
diff --git a/gateway/run.py b/gateway/run.py
index 1c7a037519..f4c23c12cb 100644
--- a/gateway/run.py
+++ b/gateway/run.py
@@ -1849,6 +1849,23 @@ class GatewayRunner:
                     )
                 message_text = f"{context_note}\n\n{message_text}"
 
+        # -----------------------------------------------------------------
+        # Inject reply context when user replies to a message not in history.
+        # Telegram (and other platforms) let users reply to specific messages,
+        # but if the quoted message is from a previous session, cron delivery,
+        # or background task, the agent has no context about what's being
+        # referenced. Prepend the quoted text so the agent understands. (#1594)
+        # -----------------------------------------------------------------
+        if getattr(event, 'reply_to_text', None) and event.reply_to_message_id:
+            reply_snippet = event.reply_to_text[:500]
+            found_in_history = any(
+                reply_snippet[:200] in (msg.get("content") or "")
+                for msg in history
+                if msg.get("role") in ("assistant", "user", "tool")
+            )
+            if not found_in_history:
+                message_text = f'[Replying to: "{reply_snippet}"]\n\n{message_text}'
+
         try:
             # Emit agent:start hook
             hook_ctx = {