feat: simple reply agent that tells private whispers that i am a bot

.env

@@ -4,5 +4,5 @@ MISTLE_USER=mistle
 MISTLE_PASSWORD=sl-mudbot
 MISTLE_LOGIN_PROMPT=Wie heisst Du denn ("neu" fuer neuen Spieler) ?
 MISTLE_EXIT_COMMAND=schlaf ein
-MISTLE_AGENT_MODE=false
-MISTLE_AGENT=explore
+MISTLE_AGENT_MODE=true
+MISTLE_AGENT=communication

agent.py

@@ -4,7 +4,7 @@ import re
 from abc import ABC, abstractmethod
 from collections import deque
 from dataclasses import dataclass, field
-from typing import Deque, Optional, Pattern, Set
+from typing import Deque, Optional, Pattern, Set, Tuple
 
 
 class Agent(ABC):
@@ -79,3 +79,38 @@ class ExploreAgent(Agent):
             return f"{self.inspect_command} {target}"
 
         return None
+
+
+@dataclass
+class CommunicationAgent(Agent):
+    """Agent that replies to private tells."""
+
+    reply_template: str = "teile {player} mit Hallo! Ich bin Mistle und ein Bot."
+    tell_pattern: Pattern[str] = field(
+        default_factory=lambda: re.compile(
+            r"^(?P<player>[^\s]+) teilt (d|D)ir mit: (?P<message>.+)$",
+            re.MULTILINE,
+        )
+    )
+    last_output: str = field(default="", init=False)
+    pending_replies: Deque[Tuple[str, str]] = field(default_factory=deque, init=False)
+
+    def observe(self, output: str) -> None:
+        if not output:
+            return
+        self.last_output = output
+        for match in self.tell_pattern.finditer(output):
+            player = match.group("player").strip()
+            message = match.group("message").strip()
+            if not player:
+                continue
+            self.pending_replies.append((player, message))
+            print(f"[Agent] Received message from {player}: {message}")
+
+    def decide(self) -> Optional[str]:
+        if not self.pending_replies:
+            return None
+        player, _ = self.pending_replies.popleft()
+        reply = self.reply_template.format(player=player)
+        print(f"[Agent] Replying to {player}")
+        return reply

app.py

@@ -152,12 +152,12 @@ def build_agent(agent_spec: str) -> Agent:
     if key == "simple":
         return SimpleAgent()
 
-    if key == "explore":
+    if key in {"explore", "communication"}:
         try:
             module = import_module("agent")
-            agent_cls = getattr(module, "ExploreAgent")
+            agent_cls = getattr(module, f"{key.capitalize()}Agent")
         except AttributeError as exc:  # pragma: no cover - optional dependency
-            raise RuntimeError("ExploreAgent is not available in agent module") from exc
+            raise RuntimeError(f"{key.capitalize()}Agent is not available in agent module") from exc
         return _instantiate_agent(agent_cls, normalized)
 
     if ":" in normalized: