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

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/README_bezalel_gemma4_vps.md

@@ -1,51 +0,0 @@
-# Bezalel Gemma 4 VPS Wiring
-
-Issue: timmy-home #544
-
-This helper is the repo-side operator bundle for wiring a live Gemma 4 endpoint into Bezalel's VPS config without hardcoding one dead pod forever.
-
-What `scripts/bezalel_gemma4_vps.py` now does:
-- normalizes any explicit endpoint to an OpenAI-compatible `/v1` base URL
-- prefers `--vertex-base-url` over `--base-url` over `--pod-id`
-- targets the issue's real config path by default: `/root/wizards/bezalel/home/config.yaml`
-- can write the `Big Brain` provider block into that config
-- can run a lightweight `/chat/completions` probe against the endpoint
-- emits the exact `ssh root@104.131.15.18 ... curl ...` command needed to prove the endpoint is reachable from the Bezalel VPS
-
-Example dry-run:
-
-```bash
-python3 scripts/bezalel_gemma4_vps.py \
-  --base-url https://<pod-id>-11434.proxy.runpod.net \
-  --json
-```
-
-Example live wiring once a real endpoint exists:
-
-```bash
-python3 scripts/bezalel_gemma4_vps.py \
-  --base-url https://<pod-id>-11434.proxy.runpod.net \
-  --config-path /root/wizards/bezalel/home/config.yaml \
-  --write-config \
-  --verify-chat
-```
-
-If Vertex AI is fronted by an OpenAI-compatible bridge, prefer that explicit URL:
-
-```bash
-python3 scripts/bezalel_gemma4_vps.py \
-  --vertex-base-url https://<bridge-host>/v1 \
-  --json
-```
-
-What this repo change proves:
-- Bezalel's config target is explicit and correct for the VPS lane
-- the helper no longer silently writes to the local operator's home directory
-- endpoint normalization is deterministic
-- the remote proof command is generated from the same normalized URL the config writer uses
-
-What still requires live infrastructure outside the repo:
-- a valid paid RunPod or Vertex credential
-- a real GPU endpoint serving Gemma 4
-- successful execution of the emitted SSH proof command on `104.131.15.18`
-- successful Bezalel Hermes chat against that live endpoint

scripts/bezalel_gemma4_vps.py

@@ -8,14 +8,12 @@ Safe by default:
 - can call the RunPod GraphQL API if a key is provided and --apply-runpod is used
 - can update a Hermes config file in-place when --write-config is used
 - can verify an OpenAI-compatible endpoint with a lightweight chat probe
-- emits the exact Bezalel VPS curl proof command for remote verification
 """
 
 from __future__ import annotations
 
 import argparse
 import json
-import shlex
 from pathlib import Path
 from typing import Any
 from urllib import request
@@ -29,9 +27,7 @@ DEFAULT_IMAGE = "ollama/ollama:latest"
 DEFAULT_MODEL = "gemma4:latest"
 DEFAULT_PROVIDER_NAME = "Big Brain"
 DEFAULT_TOKEN_FILE = Path.home() / ".config" / "runpod" / "access_key"
-DEFAULT_CONFIG_PATH = Path("/root/wizards/bezalel/home/config.yaml")
-DEFAULT_BEZALEL_VPS_HOST = "104.131.15.18"
-DEFAULT_VERIFY_PROMPT = "Say READY"
+DEFAULT_CONFIG_PATH = Path.home() / "wizards" / "bezalel" / "home" / "config.yaml"
 
 
 def build_deploy_mutation(
@@ -67,31 +63,8 @@ mutation {{
 '''.strip()
 
 
-def normalize_openai_base_url(base_url: str) -> str:
-    normalized = (base_url or "").strip().rstrip("/")
-    if not normalized:
-        return normalized
-    for suffix in ("/chat/completions", "/models"):
-        if normalized.endswith(suffix):
-            normalized = normalized[: -len(suffix)]
-            break
-    if not normalized.endswith("/v1"):
-        normalized = f"{normalized}/v1"
-    return normalized
-
-
 def build_runpod_endpoint(pod_id: str, port: int = 11434) -> str:
-    return normalize_openai_base_url(f"https://{pod_id}-{port}.proxy.runpod.net")
-
-
-def resolve_base_url(*, vertex_base_url: str | None = None, base_url: str | None = None, pod_id: str | None = None) -> tuple[str | None, str | None]:
-    if vertex_base_url:
-        return normalize_openai_base_url(vertex_base_url), "vertex_base_url"
-    if base_url:
-        return normalize_openai_base_url(base_url), "base_url"
-    if pod_id:
-        return build_runpod_endpoint(pod_id), "pod_id"
-    return None, None
+    return f"https://{pod_id}-{port}.proxy.runpod.net/v1"
 
 
 def parse_deploy_response(payload: dict[str, Any]) -> dict[str, str]:
@@ -129,7 +102,7 @@ def update_config_text(config_text: str, *, base_url: str, model: str = DEFAULT_
 
     replacement = {
         "name": provider_name,
-        "base_url": normalize_openai_base_url(base_url),
+        "base_url": base_url,
         "api_key": "",
         "model": model,
     }
@@ -156,8 +129,7 @@ def write_config_file(config_path: Path, *, base_url: str, model: str = DEFAULT_
     return updated
 
 
-def verify_openai_chat(base_url: str, *, model: str = DEFAULT_MODEL, prompt: str = DEFAULT_VERIFY_PROMPT) -> str:
-    base_url = normalize_openai_base_url(base_url)
+def verify_openai_chat(base_url: str, *, model: str = DEFAULT_MODEL, prompt: str = "Say READY") -> str:
     payload = json.dumps(
         {
             "model": model,
@@ -167,7 +139,7 @@ def verify_openai_chat(base_url: str, *, model: str = DEFAULT_MODEL, prompt: str
         }
     ).encode()
     req = request.Request(
-        f"{base_url}/chat/completions",
+        f"{base_url.rstrip('/')}/chat/completions",
         data=payload,
         headers={"Content-Type": "application/json"},
         method="POST",
@@ -177,30 +149,6 @@ def verify_openai_chat(base_url: str, *, model: str = DEFAULT_MODEL, prompt: str
     return data["choices"][0]["message"]["content"]
 
 
-def build_vps_verify_command(
-    *,
-    base_url: str,
-    model: str = DEFAULT_MODEL,
-    prompt: str = DEFAULT_VERIFY_PROMPT,
-    vps_host: str = DEFAULT_BEZALEL_VPS_HOST,
-) -> str:
-    payload = json.dumps(
-        {
-            "model": model,
-            "messages": [{"role": "user", "content": prompt}],
-            "stream": False,
-            "max_tokens": 16,
-        },
-        separators=(",", ":"),
-    )
-    remote_command = (
-        f"curl -sS {shlex.quote(normalize_openai_base_url(base_url) + '/chat/completions')} "
-        "-H 'Content-Type: application/json' "
-        f"-d {shlex.quote(payload)}"
-    )
-    return f"ssh root@{vps_host} {shlex.quote(remote_command)}"
-
-
 def parse_args() -> argparse.Namespace:
     parser = argparse.ArgumentParser(description="Provision a RunPod Gemma 4 endpoint and wire a Hermes config for Bezalel.")
     parser.add_argument("--pod-name", default="bezalel-gemma4")
@@ -212,8 +160,6 @@ def parse_args() -> argparse.Namespace:
     parser.add_argument("--config-path", type=Path, default=DEFAULT_CONFIG_PATH)
     parser.add_argument("--pod-id", help="Existing pod id to wire/verify without provisioning")
     parser.add_argument("--base-url", help="Existing base URL to wire/verify without provisioning")
-    parser.add_argument("--vertex-base-url", help="OpenAI-compatible Vertex bridge URL; takes precedence over --base-url and --pod-id")
-    parser.add_argument("--vps-host", default=DEFAULT_BEZALEL_VPS_HOST, help="Bezalel VPS host for the remote curl proof command")
     parser.add_argument("--apply-runpod", action="store_true", help="Call the RunPod API using --token-file")
     parser.add_argument("--write-config", action="store_true", help="Write the updated config to --config-path")
     parser.add_argument("--verify-chat", action="store_true", help="Call the OpenAI-compatible chat endpoint")
@@ -229,18 +175,13 @@ def main() -> None:
         "cloud_type": args.cloud_type,
         "model": args.model,
         "provider_name": args.provider_name,
-        "config_path": str(args.config_path),
-        "vps_host": args.vps_host,
         "actions": [],
     }
 
-    base_url, base_url_source = resolve_base_url(
-        vertex_base_url=args.vertex_base_url,
-        base_url=args.base_url,
-        pod_id=args.pod_id,
-    )
-    if base_url_source:
-        summary["actions"].append(f"resolved_base_url_from_{base_url_source}")
+    base_url = args.base_url
+    if not base_url and args.pod_id:
+        base_url = build_runpod_endpoint(args.pod_id)
+        summary["actions"].append("computed_base_url_from_pod_id")
 
     if args.apply_runpod:
         if not args.token_file.exists():
@@ -255,17 +196,12 @@ def main() -> None:
         base_url = build_runpod_endpoint("<pod-id>")
         summary["actions"].append("using_placeholder_base_url")
 
-    summary["base_url"] = normalize_openai_base_url(base_url)
+    summary["base_url"] = base_url
     summary["config_preview"] = update_config_text("", base_url=base_url, model=args.model, provider_name=args.provider_name)
-    summary["vps_verify_command"] = build_vps_verify_command(
-        base_url=base_url,
-        model=args.model,
-        prompt=DEFAULT_VERIFY_PROMPT,
-        vps_host=args.vps_host,
-    )
 
     if args.write_config:
         write_config_file(args.config_path, base_url=base_url, model=args.model, provider_name=args.provider_name)
+        summary["config_path"] = str(args.config_path)
         summary["actions"].append("wrote_config")
 
     if args.verify_chat:
@@ -278,10 +214,8 @@ def main() -> None:
 
     print("--- Bezalel Gemma4 RunPod Wiring ---")
     print(f"Pod name: {args.pod_name}")
-    print(f"Base URL: {summary['base_url']}")
+    print(f"Base URL: {base_url}")
     print(f"Model: {args.model}")
-    print(f"Config target: {args.config_path}")
-    print(f"Bezalel VPS proof: {summary['vps_verify_command']}")
     if args.write_config:
         print(f"Config written: {args.config_path}")
     if "verify_response" in summary:

tests/test_bezalel_gemma4_vps.py

@@ -1,20 +1,14 @@
 from __future__ import annotations
 
 import json
-from pathlib import Path
 from unittest.mock import patch
 
 import yaml
 
 from scripts.bezalel_gemma4_vps import (
-    DEFAULT_CONFIG_PATH,
-    DEFAULT_BEZALEL_VPS_HOST,
     build_deploy_mutation,
     build_runpod_endpoint,
-    build_vps_verify_command,
-    normalize_openai_base_url,
     parse_deploy_response,
-    resolve_base_url,
     update_config_text,
     verify_openai_chat,
 )
@@ -34,10 +28,6 @@ class _FakeResponse:
         return False
 
 
-def test_default_config_path_targets_bezalel_vps_root_config() -> None:
-    assert DEFAULT_CONFIG_PATH == Path("/root/wizards/bezalel/home/config.yaml")
-
-
 def test_build_deploy_mutation_uses_ollama_image_and_openai_port() -> None:
     query = build_deploy_mutation(name="bezalel-gemma4", gpu_type="NVIDIA L40S", model_tag="gemma4:latest")
 
@@ -47,30 +37,6 @@ def test_build_deploy_mutation_uses_ollama_image_and_openai_port() -> None:
     assert 'volumeMountPath: "/root/.ollama"' in query
 
 
-def test_normalize_openai_base_url_adds_v1_suffix() -> None:
-    assert normalize_openai_base_url("https://pod-11434.proxy.runpod.net") == "https://pod-11434.proxy.runpod.net/v1"
-
-
-def test_normalize_openai_base_url_trims_chat_completions_suffix() -> None:
-    assert normalize_openai_base_url("https://pod-11434.proxy.runpod.net/v1/chat/completions") == "https://pod-11434.proxy.runpod.net/v1"
-
-
-def test_resolve_base_url_prefers_vertex_over_base_and_pod_id() -> None:
-    base_url, source = resolve_base_url(
-        vertex_base_url="https://vertex.example.com/openai",
-        base_url="https://plain.example.com",
-        pod_id="abc123",
-    )
-    assert source == "vertex_base_url"
-    assert base_url == "https://vertex.example.com/openai/v1"
-
-
-def test_resolve_base_url_falls_back_to_base_url_before_pod_id() -> None:
-    base_url, source = resolve_base_url(base_url="https://plain.example.com", pod_id="abc123")
-    assert source == "base_url"
-    assert base_url == "https://plain.example.com/v1"
-
-
 def test_build_runpod_endpoint_appends_v1_suffix() -> None:
     assert build_runpod_endpoint("abc123") == "https://abc123-11434.proxy.runpod.net/v1"
 
@@ -94,7 +60,7 @@ def test_parse_deploy_response_extracts_pod_id_and_endpoint() -> None:
     }
 
 
-def test_update_config_text_upserts_big_brain_provider_and_normalizes_base_url() -> None:
+def test_update_config_text_upserts_big_brain_provider() -> None:
     original = """
 model:
   default: kimi-k2.5
@@ -106,7 +72,7 @@ custom_providers:
     model: gemma3:27b
 """
 
-    updated = update_config_text(original, base_url="https://new-pod-11434.proxy.runpod.net", model="gemma4:latest")
+    updated = update_config_text(original, base_url="https://new-pod-11434.proxy.runpod.net/v1", model="gemma4:latest")
     parsed = yaml.safe_load(updated)
 
     assert parsed["model"] == {"default": "kimi-k2.5", "provider": "kimi-coding"}
@@ -120,14 +86,7 @@ custom_providers:
     ]
 
 
-def test_build_vps_verify_command_targets_bezalel_host_and_chat_completions() -> None:
-    command = build_vps_verify_command(base_url="https://pod-11434.proxy.runpod.net", model="gemma4:latest")
-    assert command.startswith(f"ssh root@{DEFAULT_BEZALEL_VPS_HOST} ")
-    assert "/v1/chat/completions" in command
-    assert "gemma4:latest" in command
-
-
-def test_verify_openai_chat_calls_chat_completions_with_normalized_base_url() -> None:
+def test_verify_openai_chat_calls_chat_completions() -> None:
     response_payload = {
         "choices": [
             {
@@ -142,7 +101,7 @@ def test_verify_openai_chat_calls_chat_completions_with_normalized_base_url() ->
         "scripts.bezalel_gemma4_vps.request.urlopen",
         return_value=_FakeResponse(response_payload),
     ) as mocked:
-        result = verify_openai_chat("https://pod-11434.proxy.runpod.net", model="gemma4:latest", prompt="say READY")
+        result = verify_openai_chat("https://pod-11434.proxy.runpod.net/v1", model="gemma4:latest", prompt="say READY")
 
     assert result == "READY"
     req = mocked.call_args.args[0]
@@ -150,10 +109,3 @@ def test_verify_openai_chat_calls_chat_completions_with_normalized_base_url() ->
     payload = json.loads(req.data.decode())
     assert payload["model"] == "gemma4:latest"
     assert payload["messages"][0]["content"] == "say READY"
-
-
-def test_readme_documents_root_config_path_and_vps_proof_command() -> None:
-    readme = Path("scripts/README_bezalel_gemma4_vps.md").read_text()
-    assert "/root/wizards/bezalel/home/config.yaml" in readme
-    assert "ssh root@104.131.15.18" in readme
-    assert "--vertex-base-url" in readme

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"]