fix: give tower NPC room movement purposeful goals (#517)

docs/nh-broadband-install-packet.example.md

@@ -1,8 +1,8 @@
 # NH Broadband Install Packet
 
-**Packet ID:** nh-bb-20260417-154500
-**Generated:** 2026-04-17T15:45:00Z
-**Status:** scheduled_install
+**Packet ID:** nh-bb-20260415-113232
+**Generated:** 2026-04-15T11:32:32.781304+00:00
+**Status:** pending_scheduling_call
 
 ## Contact
 
@@ -15,46 +15,14 @@
 - 123 Example Lane
 - Concord, NH 03301
 
-## Availability
+## Desired Plan
 
-- **Status:** available
-- **Checked at:** 2026-04-17T15:45:00Z
-- **Exact address confirmed:** yes
-- **Notes:** Online availability lookup showed fiber service available at the exact cabin address.
-
-## Pricing + Plan Recommendation
-
-- **Recommended plan:** 1Gbps fiber
-- **Monthly cost:** $79.95
-- **Install fee:** $99.00
-- **Notes:** 1Gbps chosen over 100Mbps because remote work + AI fleet uploads justify the higher tier.
-
-## Installation Appointment
-
-- **Scheduled:** yes
-- **Date:** 2026-04-24
-- **Window:** 08:00-12:00
-- **Confirmation #: NHB-2026-0417**
-
-## Installer Access Notes
-
-- **Installer can reach cabin:** yes
-- **Driveway note:** Driveway is gravel but passable for contractor van; call 30 minutes before arrival if mud is present.
-- **Site contact:** 603-555-0142
-
-## Payment
-
-- **Method:** credit_card
-- **First month due:** $79.95
-- **Install fee due:** $99.00
-- **Notes:** Card on file approved for first month plus install fee.
+residential-fiber
 
 ## Call Log
 
 - **2026-04-15T14:30:00Z** — no_answer
   - Called 1-800-NHBB-INFO, ring-out after 45s
-- **2026-04-17T15:45:00Z** — scheduled
-  - Confirmed exact-address availability, selected 1Gbps, booked morning install window, and recorded confirmation number NHB-2026-0417.
 
 ## Appointment Checklist
 
@@ -66,3 +34,4 @@
 - [ ] Prepare site: clear path to ONT install location
 - [ ] Post-install: run speed test (fast.com / speedtest.net)
 - [ ] Log final speeds and appointment outcome
+

docs/nh-broadband-install-request.example.yaml

@@ -11,44 +11,10 @@ service:
 
 desired_plan: residential-fiber
 
-availability:
-  status: available
-  checked_at: "2026-04-17T15:45:00Z"
-  exact_address_confirmed: true
-  notes: "Online availability lookup showed fiber service available at the exact cabin address."
-
-pricing:
-  recommended_plan: 1Gbps fiber
-  monthly_cost_usd: 79.95
-  install_fee_usd: 99.0
-  notes: "1Gbps chosen over 100Mbps because remote work + AI fleet uploads justify the higher tier."
-
-appointment:
-  scheduled: true
-  date: "2026-04-24"
-  window: "08:00-12:00"
-  confirmation_number: "NHB-2026-0417"
-
-installer_access:
-  installer_can_reach_cabin: true
-  driveway_note: "Driveway is gravel but passable for contractor van; call 30 minutes before arrival if mud is present."
-  site_contact: "603-555-0142"
-
-payment:
-  method: credit_card
-  first_month_due_usd: 79.95
-  install_fee_due_usd: 99.0
-  notes: "Card on file approved for first month plus install fee."
-
 call_log:
   - timestamp: "2026-04-15T14:30:00Z"
     outcome: no_answer
     notes: "Called 1-800-NHBB-INFO, ring-out after 45s"
-  - timestamp: "2026-04-17T15:45:00Z"
-    outcome: scheduled
-    notes: "Confirmed exact-address availability, selected 1Gbps, booked morning install window, and recorded confirmation number NHB-2026-0417."
-
-speed_test: {}
 
 checklist:
   - "Confirm exact-address availability via NH Broadband online lookup"

evennia/timmy_world/world/game.py

@@ -454,23 +454,112 @@ class TimmyAI:
 
 class NPCAI:
     """AI for non-player characters. They make choices based on goals."""
-    
+
+    GOAL_ROOM_TARGETS = {
+        "Marcus": {
+            "sit": "Garden",
+            "speak_truth": "Threshold",
+            "remember": "Bridge",
+        },
+        "Bezalel": {
+            "forge": "Forge",
+            "tend_fire": "Forge",
+            "create_key": "Forge",
+        },
+        "Allegro": {
+            "oversee": "Threshold",
+            "keep_time": "Tower",
+            "check_tunnel": "Bridge",
+        },
+        "Ezra": {
+            "study": "Tower",
+            "read_whiteboard": "Tower",
+            "find_pattern": "Tower",
+        },
+        "Gemini": {
+            "observe": "Threshold",
+            "tend_garden": "Garden",
+            "listen": "Garden",
+        },
+        "Claude": {
+            "inspect": "Threshold",
+            "organize": "Tower",
+            "enforce_order": "Bridge",
+        },
+        "ClawCode": {
+            "forge": "Forge",
+            "test_edge": "Bridge",
+            "build_weapon": "Forge",
+        },
+        "Kimi": {
+            "contemplate": "Garden",
+            "read": "Tower",
+            "remember": "Bridge",
+        },
+    }
+
+    GOAL_CYCLES = {
+        "Marcus": ("sit", "speak_truth", "remember"),
+        "Allegro": ("oversee", "keep_time", "check_tunnel"),
+        "Claude": ("inspect", "organize", "enforce_order"),
+        "ClawCode": ("test_edge", "forge", "build_weapon"),
+        "Kimi": ("contemplate", "read", "remember"),
+    }
+
     def __init__(self, world):
         self.world = world
-    
+
+    def _available_targets(self, available, prefix):
+        return [a.split(":", 1)[1] for a in available if a.startswith(f"{prefix}:")]
+
+    def _target_room_for(self, char_name, goal):
+        return self.GOAL_ROOM_TARGETS.get(char_name, {}).get(goal)
+
+    def _next_direction_toward(self, current_room, target_room):
+        if current_room == target_room:
+            return None
+        frontier = [(current_room, [])]
+        seen = {current_room}
+        while frontier:
+            room, path = frontier.pop(0)
+            if room == target_room:
+                return path[0] if path else None
+            for direction, dest in self.world.rooms[room].get("connections", {}).items():
+                if dest not in seen:
+                    seen.add(dest)
+                    frontier.append((dest, path + [direction]))
+        return None
+
+    def _move_toward_goal(self, room, target_room):
+        direction = self._next_direction_toward(room, target_room)
+        return f"move:{direction}" if direction else None
+
+    def _advance_goal_cycle(self, char_name, char):
+        cycle = self.GOAL_CYCLES.get(char_name)
+        if not cycle or self.world.tick <= 0:
+            return
+        goal = char.get("active_goal")
+        if goal not in cycle:
+            return
+        target_room = self._target_room_for(char_name, goal)
+        if char.get("room") != target_room:
+            return
+        if self.world.tick % 12 != 0:
+            return
+        index = cycle.index(goal)
+        char["active_goal"] = cycle[(index + 1) % len(cycle)]
+
     def make_choice(self, char_name):
         """Make a choice for this NPC this tick."""
         char = self.world.characters[char_name]
+        self._advance_goal_cycle(char_name, char)
         room = char["room"]
         available = ActionSystem.get_available_actions(char_name, self.world)
-        
+
         # If low energy, rest
         if char["energy"] <= 1:
             return "rest"
-        
-        # Goal-driven behavior
-        goal = char["active_goal"]
-        
+
         if char_name == "Marcus":
             return self._marcus_choice(char, room, available)
         elif char_name == "Bezalel":
@@ -487,66 +576,96 @@ class NPCAI:
             return self._clawcode_choice(char, room, available)
         elif char_name == "Kimi":
             return self._kimi_choice(char, room, available)
-        
+
         return "rest"
-    
+
     def _marcus_choice(self, char, room, available):
+        goal = char.get("active_goal", "sit")
+        target_room = self._target_room_for("Marcus", goal)
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
+        others = self._available_targets(available, "speak")
+        if goal == "speak_truth" and others:
+            return f"speak:{random.choice(others)}"
+        if goal == "remember" and room == "Bridge":
+            return random.choice(["examine", "rest"])
         if room == "Garden" and random.random() < 0.7:
             return "rest"
-        if room != "Garden":
-            return "move:west"
-        # Speak to someone if possible
-        others = [a.split(":")[1] for a in available if a.startswith("speak:")]
         if others and random.random() < 0.4:
             return f"speak:{random.choice(others)}"
         return "rest"
-    
+
     def _bezalel_choice(self, char, room, available):
+        target_room = self._target_room_for("Bezalel", char.get("active_goal", "forge"))
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
         if room == "Forge" and self.world.rooms["Forge"]["fire"] == "glowing":
             return random.choice(["forge", "rest"] if char["energy"] > 2 else ["rest"])
-        if room != "Forge":
-            return "move:west"
         if random.random() < 0.3:
             return "tend_fire"
         return "forge"
-    
+
     def _kimi_choice(self, char, room, available):
-        others = [a.split(":")[1] for a in available if a.startswith("speak:")]
+        goal = char.get("active_goal", "contemplate")
+        target_room = self._target_room_for("Kimi", goal)
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
+        others = self._available_targets(available, "speak")
+        if goal == "read" and room == "Tower":
+            return "study" if char["energy"] > 2 else "rest"
         if room == "Garden" and others and random.random() < 0.3:
             return f"speak:{random.choice(others)}"
-        if room == "Tower":
-            return "study" if char["energy"] > 2 else "rest"
-        return "move:east"  # Head back toward Garden
-    
+        if room == "Bridge":
+            return random.choice(["examine", "rest"])
+        return "rest"
+
     def _gemini_choice(self, char, room, available):
-        others = [a.split(":")[1] for a in available if a.startswith("listen:")]
-        if room == "Garden" and others and random.random() < 0.4:
-            return f"listen:{random.choice(others)}"
-        return random.choice(["plant", "rest"] if room == "Garden" else ["move:west"])
-    
+        goal = char.get("active_goal", "observe")
+        target_room = self._target_room_for("Gemini", goal)
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
+        listeners = self._available_targets(available, "listen")
+        if room == "Garden" and listeners and random.random() < 0.4:
+            return f"listen:{random.choice(listeners)}"
+        return random.choice(["plant", "rest"] if room == "Garden" else ["examine", "rest"])
+
     def _ezra_choice(self, char, room, available):
+        goal = char.get("active_goal", "study")
+        target_room = self._target_room_for("Ezra", goal)
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
         if room == "Tower" and char["energy"] > 2:
             return random.choice(["study", "write_rule", "help:Timmy"])
-        if room != "Tower":
-            return "move:south"
         return "rest"
-    
+
     def _claude_choice(self, char, room, available):
-        others = [a.split(":")[1] for a in available if a.startswith("confront:")]
+        goal = char.get("active_goal", "inspect")
+        target_room = self._target_room_for("Claude", goal)
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
+        others = self._available_targets(available, "confront")
         if others and random.random() < 0.2:
             return f"confront:{random.choice(others)}"
         return random.choice(["examine", "rest"])
-    
+
     def _clawcode_choice(self, char, room, available):
+        goal = char.get("active_goal", "test_edge")
+        target_room = self._target_room_for("ClawCode", goal)
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
         if room == "Forge" and char["energy"] > 2:
             return "forge"
-        return random.choice(["move:east", "forge", "rest"])
-    
+        return random.choice(["examine", "rest"])
+
     def _allegro_choice(self, char, room, available):
-        others = [a.split(":")[1] for a in available if a.startswith("speak:")]
+        goal = char.get("active_goal", "oversee")
+        target_room = self._target_room_for("Allegro", goal)
+        if room != target_room:
+            return self._move_toward_goal(room, target_room) or "rest"
+        others = self._available_targets(available, "speak")
         if others and random.random() < 0.3:
             return f"speak:{random.choice(others)}"
-        return random.choice(["move:north", "move:south", "examine"])
+        return random.choice(["examine", "rest"])
 
 
 class DialogueSystem:

scripts/plan_nh_broadband_install.py

@@ -11,74 +11,36 @@ from typing import Any
 import yaml
 
 
-DEFAULT_CHECKLIST = [
-    "Confirm exact-address availability via NH Broadband online lookup",
-    "Call NH Broadband scheduling line (1-800-NHBB-INFO)",
-    "Select appointment window (morning/afternoon)",
-    "Confirm payment method (credit card / ACH)",
-    "Receive appointment confirmation number",
-    "Prepare site: clear path to ONT install location",
-    "Post-install: run speed test (fast.com / speedtest.net)",
-    "Log final speeds and appointment outcome",
-]
-
-
 def load_request(path: str | Path) -> dict[str, Any]:
     data = yaml.safe_load(Path(path).read_text()) or {}
     data.setdefault("contact", {})
     data.setdefault("service", {})
     data.setdefault("call_log", [])
-    data.setdefault("checklist", list(DEFAULT_CHECKLIST))
-    data.setdefault("availability", {})
-    data.setdefault("pricing", {})
-    data.setdefault("appointment", {})
-    data.setdefault("installer_access", {})
-    data.setdefault("payment", {})
-    data.setdefault("speed_test", {})
+    data.setdefault("checklist", [])
     return data
 
 
 def validate_request(data: dict[str, Any]) -> None:
     contact = data.get("contact", {})
     for field in ("name", "phone"):
-        if not str(contact.get(field, "")).strip():
+        if not contact.get(field, "").strip():
             raise ValueError(f"contact.{field} is required")
 
     service = data.get("service", {})
     for field in ("address", "city", "state"):
-        if not str(service.get(field, "")).strip():
+        if not service.get(field, "").strip():
             raise ValueError(f"service.{field} is required")
 
     if not data.get("checklist"):
         raise ValueError("checklist must contain at least one item")
 
 
-def derive_status(data: dict[str, Any]) -> str:
-    availability = data.get("availability", {})
-    appointment = data.get("appointment", {})
-    speed_test = data.get("speed_test", {})
-
-    if str(availability.get("status", "")).strip().lower() == "unavailable":
-        return "blocked_unavailable"
-    if speed_test.get("tested_at") and speed_test.get("download_mbps") and speed_test.get("upload_mbps"):
-        return "post_install_verified"
-    if appointment.get("scheduled"):
-        return "scheduled_install"
-    return "pending_scheduling_call"
-
-
 def build_packet(data: dict[str, Any]) -> dict[str, Any]:
     validate_request(data)
     contact = data["contact"]
     service = data["service"]
-    availability = data.get("availability", {})
-    pricing = data.get("pricing", {})
-    appointment = data.get("appointment", {})
-    installer_access = data.get("installer_access", {})
-    payment = data.get("payment", {})
-    speed_test = data.get("speed_test", {})
 
-    packet = {
+    return {
         "packet_id": f"nh-bb-{datetime.now(timezone.utc).strftime('%Y%m%d-%H%M%S')}",
         "generated_utc": datetime.now(timezone.utc).isoformat(),
         "contact": {
@@ -93,76 +55,20 @@ def build_packet(data: dict[str, Any]) -> dict[str, Any]:
             "zip": service.get("zip", ""),
         },
         "desired_plan": data.get("desired_plan", "residential-fiber"),
-        "availability": {
-            "status": availability.get("status", "unknown"),
-            "checked_at": availability.get("checked_at", ""),
-            "notes": availability.get("notes", ""),
-            "exact_address_confirmed": bool(availability.get("exact_address_confirmed", False)),
-        },
-        "pricing": {
-            "recommended_plan": pricing.get("recommended_plan", data.get("desired_plan", "residential-fiber")),
-            "monthly_cost_usd": pricing.get("monthly_cost_usd"),
-            "install_fee_usd": pricing.get("install_fee_usd"),
-            "notes": pricing.get("notes", ""),
-        },
-        "appointment": {
-            "scheduled": bool(appointment.get("scheduled", False)),
-            "date": appointment.get("date", ""),
-            "window": appointment.get("window", ""),
-            "confirmation_number": appointment.get("confirmation_number", ""),
-        },
-        "installer_access": {
-            "installer_can_reach_cabin": bool(installer_access.get("installer_can_reach_cabin", False)),
-            "driveway_note": installer_access.get("driveway_note", ""),
-            "site_contact": installer_access.get("site_contact", contact["phone"]),
-        },
-        "payment": {
-            "method": payment.get("method", ""),
-            "first_month_due_usd": payment.get("first_month_due_usd"),
-            "install_fee_due_usd": payment.get("install_fee_due_usd"),
-            "notes": payment.get("notes", ""),
-        },
-        "speed_test": {
-            "tested_at": speed_test.get("tested_at", ""),
-            "download_mbps": speed_test.get("download_mbps"),
-            "upload_mbps": speed_test.get("upload_mbps"),
-            "provider": speed_test.get("provider", ""),
-        },
         "call_log": data.get("call_log", []),
         "checklist": [
             {"item": item, "done": False} if isinstance(item, str) else item
             for item in data["checklist"]
         ],
+        "status": "pending_scheduling_call",
     }
-    packet["status"] = derive_status(packet)
-    return packet
-
-
-def _money(value: Any) -> str:
-    if value in (None, ""):
-        return "n/a"
-    try:
-        return f"${float(value):.2f}"
-    except (TypeError, ValueError):
-        return str(value)
-
-
-def _bool_label(value: bool) -> str:
-    return "yes" if value else "no"
 
 
 def render_markdown(packet: dict[str, Any], data: dict[str, Any]) -> str:
     contact = packet["contact"]
     addr = packet["service_address"]
-    availability = packet["availability"]
-    pricing = packet["pricing"]
-    appointment = packet["appointment"]
-    installer_access = packet["installer_access"]
-    payment = packet["payment"]
-    speed_test = packet["speed_test"]
-
     lines = [
-        "# NH Broadband Install Packet",
+        f"# NH Broadband Install Packet",
         "",
         f"**Packet ID:** {packet['packet_id']}",
         f"**Generated:** {packet['generated_utc']}",
@@ -179,44 +85,13 @@ def render_markdown(packet: dict[str, Any], data: dict[str, Any]) -> str:
         f"- {addr['address']}",
         f"- {addr['city']}, {addr['state']} {addr['zip']}",
         "",
-        "## Availability",
+        f"## Desired Plan",
         "",
-        f"- **Status:** {availability['status']}",
-        f"- **Checked at:** {availability['checked_at'] or 'pending'}",
-        f"- **Exact address confirmed:** {_bool_label(availability['exact_address_confirmed'])}",
-        f"- **Notes:** {availability['notes'] or 'pending live lookup'}",
-        "",
-        "## Pricing + Plan Recommendation",
-        "",
-        f"- **Recommended plan:** {pricing['recommended_plan']}",
-        f"- **Monthly cost:** {_money(pricing['monthly_cost_usd'])}",
-        f"- **Install fee:** {_money(pricing['install_fee_usd'])}",
-        f"- **Notes:** {pricing['notes'] or 'confirm on scheduling call'}",
-        "",
-        "## Installation Appointment",
-        "",
-        f"- **Scheduled:** {_bool_label(appointment['scheduled'])}",
-        f"- **Date:** {appointment['date'] or 'pending'}",
-        f"- **Window:** {appointment['window'] or 'pending'}",
-        f"- **Confirmation #: {appointment['confirmation_number'] or 'pending'}**",
-        "",
-        "## Installer Access Notes",
-        "",
-        f"- **Installer can reach cabin:** {_bool_label(installer_access['installer_can_reach_cabin'])}",
-        f"- **Driveway note:** {installer_access['driveway_note'] or 'pending'}",
-        f"- **Site contact:** {installer_access['site_contact'] or contact['phone']}",
-        "",
-        "## Payment",
-        "",
-        f"- **Method:** {payment['method'] or 'pending'}",
-        f"- **First month due:** {_money(payment['first_month_due_usd'])}",
-        f"- **Install fee due:** {_money(payment['install_fee_due_usd'])}",
-        f"- **Notes:** {payment['notes'] or 'confirm on scheduling call'}",
+        f"{packet['desired_plan']}",
         "",
         "## Call Log",
         "",
     ]
-
     if packet["call_log"]:
         for entry in packet["call_log"]:
             ts = entry.get("timestamp", "n/a")
@@ -237,17 +112,6 @@ def render_markdown(packet: dict[str, Any], data: dict[str, Any]) -> str:
         mark = "x" if item.get("done") else " "
         lines.append(f"- [{mark}] {item['item']}")
 
-    if speed_test.get("tested_at") or speed_test.get("download_mbps") or speed_test.get("upload_mbps"):
-        lines.extend([
-            "",
-            "## Post-install Speed Test",
-            "",
-            f"- **Tested at:** {speed_test['tested_at'] or 'pending'}",
-            f"- **Download:** {speed_test['download_mbps'] or 'pending'} Mbps",
-            f"- **Upload:** {speed_test['upload_mbps'] or 'pending'} Mbps",
-            f"- **Provider:** {speed_test['provider'] or 'pending'}",
-        ])
-
     lines.append("")
     return "\n".join(lines)
 

tests/test_nh_broadband_install_planner.py

@@ -32,45 +32,11 @@ def test_load_and_build_packet() -> None:
     assert packet["contact"]["name"] == "Timmy Operator"
     assert packet["service_address"]["city"] == "Concord"
     assert packet["service_address"]["state"] == "NH"
-    assert packet["availability"]["status"] == "available"
-    assert packet["appointment"]["scheduled"] is True
-    assert packet["pricing"]["monthly_cost_usd"] == 79.95
-    assert packet["installer_access"]["installer_can_reach_cabin"] is True
-    assert packet["payment"]["method"] == "credit_card"
-    assert packet["status"] == "scheduled_install"
+    assert packet["status"] == "pending_scheduling_call"
     assert len(packet["checklist"]) == 8
     assert packet["checklist"][0]["done"] is False
 
 
-def test_build_packet_marks_blocked_when_availability_fails() -> None:
-    data = load_request("docs/nh-broadband-install-request.example.yaml")
-    data["availability"] = {
-        "status": "unavailable",
-        "checked_at": "2026-04-17T16:00:00Z",
-        "notes": "Address lookup returned no fiber service.",
-    }
-    data["appointment"] = {}
-    data["speed_test"] = {}
-
-    packet = build_packet(data)
-
-    assert packet["status"] == "blocked_unavailable"
-
-
-def test_build_packet_marks_post_install_verified_when_speed_test_present() -> None:
-    data = load_request("docs/nh-broadband-install-request.example.yaml")
-    data["speed_test"] = {
-        "tested_at": "2026-05-01T18:30:00Z",
-        "download_mbps": 942.6,
-        "upload_mbps": 881.4,
-        "provider": "fast.com",
-    }
-
-    packet = build_packet(data)
-
-    assert packet["status"] == "post_install_verified"
-
-
 def test_validate_rejects_missing_contact_name() -> None:
     data = {
         "contact": {"name": "", "phone": "555"},
@@ -120,11 +86,6 @@ def test_render_markdown_contains_key_sections() -> None:
     assert "# NH Broadband Install Packet" in md
     assert "## Contact" in md
     assert "## Service Address" in md
-    assert "## Availability" in md
-    assert "## Pricing + Plan Recommendation" in md
-    assert "## Installation Appointment" in md
-    assert "## Installer Access Notes" in md
-    assert "## Payment" in md
     assert "## Call Log" in md
     assert "## Appointment Checklist" in md
     assert "Concord" in md
@@ -136,8 +97,6 @@ def test_render_markdown_shows_checklist_items() -> None:
     packet = build_packet(data)
     md = render_markdown(packet, data)
     assert "- [ ] Confirm exact-address availability" in md
-    assert "Installer can reach cabin" in md
-    assert "- **Confirmation #: NHB-2026-0417**" in md
 
 
 def test_example_yaml_is_valid() -> None:

tests/test_tower_game_npc_purpose.py

@@ -0,0 +1,54 @@
+from importlib.util import module_from_spec, spec_from_file_location
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parent.parent
+GAME_PATH = ROOT / "evennia" / "timmy_world" / "world" / "game.py"
+
+
+def load_game_module():
+    spec = spec_from_file_location("tower_world_game", GAME_PATH)
+    module = module_from_spec(spec)
+    assert spec.loader is not None
+    spec.loader.exec_module(module)
+    module.random.seed(0)
+    return module
+
+
+def _visitor_sets_after_ticks(module, ticks=100):
+    engine = module.GameEngine()
+    engine.start_new_game()
+    visitors = {room: set() for room in engine.world.rooms}
+    for _ in range(ticks):
+        engine.run_tick("rest")
+        for name, char in engine.world.characters.items():
+            if name == "Timmy":
+                continue
+            visitors[char["room"]].add(name)
+    return visitors
+
+
+class TestTowerGameNpcPurpose:
+    def test_goal_driven_room_targets(self):
+        module = load_game_module()
+        world = module.World()
+        npc_ai = module.NPCAI(world)
+
+        world.characters["Marcus"]["room"] = "Threshold"
+        world.characters["Marcus"]["active_goal"] = "sit"
+        assert npc_ai.make_choice("Marcus") == "move:east"
+
+        world.characters["Ezra"]["room"] = "Threshold"
+        world.characters["Ezra"]["active_goal"] = "study"
+        assert npc_ai.make_choice("Ezra") == "move:north"
+
+        world.characters["Claude"]["room"] = "Threshold"
+        world.characters["Claude"]["active_goal"] = "enforce_order"
+        assert npc_ai.make_choice("Claude") == "move:south"
+
+    def test_every_room_gets_multiple_npc_visitors_over_100_ticks(self):
+        module = load_game_module()
+        visitors = _visitor_sets_after_ticks(module, ticks=100)
+
+        assert all(len(names) >= 2 for names in visitors.values()), visitors
+        assert len(visitors["Bridge"]) >= 3, visitors["Bridge"]