diff --git a/langgraph_gateway.py b/langgraph_gateway.py
index 5931aa0..ee1eeb0 100644
--- a/langgraph_gateway.py
+++ b/langgraph_gateway.py
@@ -17,7 +17,9 @@ import hashlib
 import logging
 import os
 import re
+import socket
 import sqlite3
+import struct
 import threading
 import time
 import uuid
@@ -83,6 +85,45 @@ _kb_lock = threading.Lock()
 _kb_index_cache: Dict[str, Any] = {'loaded_at': 0.0, 'docs': []}
 _KB_ALLOWED_EXTS = {'.md', '.txt', '.json'}
 
+# ---------------------------------------------------------------------------
+# RCON world observation helper
+# ---------------------------------------------------------------------------
+
+def _rcon_query(cmd: str, host: str = '127.0.0.1', port: int = 25577,
+                password: str = 'REDACTED_RCON', timeout: float = 5.0) -> str:
+    """Send a single RCON command and return the response text."""
+    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+    s.settimeout(timeout)
+    try:
+        s.connect((host, int(port)))
+
+        def pkt(req_id: int, pkt_type: int, payload: str) -> bytes:
+            p = payload.encode('utf-8') + b'\x00\x00'
+            return struct.pack('<iii', len(p) + 8, req_id, pkt_type) + p
+
+        # Authenticate (type 3)
+        s.sendall(pkt(1, 3, password))
+        time.sleep(0.15)
+        s.recv(4096)
+        # Send command (type 2)
+        s.sendall(pkt(2, 2, cmd))
+        time.sleep(0.2)
+        r = s.recv(4096)
+        return r[12:-2].decode('utf-8', errors='replace')
+    except Exception as e:
+        return f'RCON error: {e}'
+    finally:
+        s.close()
+
+
+def _rcon_cfg() -> Dict[str, Any]:
+    """Return RCON connection params from config."""
+    return {
+        'host': str(CFG.get('rcon_host', '127.0.0.1')),
+        'port': int(CFG.get('rcon_port', 25577)),
+        'password': str(CFG.get('rcon_password', 'REDACTED_RCON')),
+    }
+
 
 COMMAND_PREFIXES_BY_MODE = {
     'sudo': [
@@ -651,6 +692,163 @@ def tool_wiki_lookup(query: str) -> Dict[str, Any]:
         return {'ok': False, 'error': str(e), 'results': []}
 
 
+# ---------------------------------------------------------------------------
+# World observation tools (RCON-based)
+# ---------------------------------------------------------------------------
+
+_ENTITY_TYPES_SCAN = [
+    'zombie', 'skeleton', 'creeper', 'spider', 'enderman', 'witch',
+    'phantom', 'drowned', 'husk', 'stray', 'pillager', 'vindicator',
+    'cow', 'pig', 'sheep', 'chicken', 'horse', 'wolf', 'cat', 'villager',
+    'iron_golem', 'snow_golem', 'bee', 'fox', 'rabbit', 'squid',
+    'bat', 'parrot', 'turtle', 'dolphin', 'axolotl', 'goat', 'frog',
+    'allay', 'sniffer', 'camel', 'armadillo', 'breeze', 'bogged',
+    'item', 'experience_orb', 'armor_stand', 'minecart', 'boat', 'tnt',
+]
+
+
+def _parse_pos(rcon_output: str) -> Optional[List[float]]:
+    """Parse position from 'data get entity <p> Pos' RCON output."""
+    m = re.search(r'\[(-?[\d.]+)d,\s*(-?[\d.]+)d,\s*(-?[\d.]+)d\]', rcon_output)
+    if m:
+        return [float(m.group(1)), float(m.group(2)), float(m.group(3))]
+    return None
+
+
+def tool_world_player_info(player: str) -> Dict[str, Any]:
+    """Get player position, health, gamemode, and inventory summary."""
+    rc = _rcon_cfg()
+    try:
+        pos_raw = _rcon_query(f'data get entity {player} Pos', **rc)
+        pos = _parse_pos(pos_raw)
+        health_raw = _rcon_query(f'data get entity {player} Health', **rc)
+        health_m = re.search(r'([\d.]+)f', health_raw)
+        health = float(health_m.group(1)) if health_m else None
+        gm_raw = _rcon_query(f'data get entity {player} playerGameType', **rc)
+        gm_m = re.search(r'(\d+)', gm_raw)
+        gamemode_map = {0: 'survival', 1: 'creative', 2: 'adventure', 3: 'spectator'}
+        gamemode = gamemode_map.get(int(gm_m.group(1)), 'unknown') if gm_m else None
+        inv_raw = _rcon_query(f'data get entity {player} Inventory', **rc)
+        # Count inventory items (each item in the list is an entry)
+        inv_count = inv_raw.count('{') if 'entity data' in inv_raw.lower() else 0
+        return {
+            'ok': True,
+            'results': [{
+                'player': player,
+                'position': {'x': pos[0], 'y': pos[1], 'z': pos[2]} if pos else None,
+                'health': health,
+                'max_health': 20.0,
+                'gamemode': gamemode,
+                'inventory_items': inv_count,
+            }],
+        }
+    except Exception as e:
+        return {'ok': False, 'error': str(e), 'results': []}
+
+
+def tool_world_nearby_entities(player: str, radius: int = 30) -> Dict[str, Any]:
+    """Scan for entity types near a player within given radius."""
+    rc = _rcon_cfg()
+    radius = min(max(radius, 5), 60)  # clamp to 5-60
+    try:
+        pos_raw = _rcon_query(f'data get entity {player} Pos', **rc)
+        pos = _parse_pos(pos_raw)
+        if not pos:
+            return {'ok': False, 'error': 'player not found or offline', 'results': []}
+        x, y, z = int(pos[0]), int(pos[1]), int(pos[2])
+        found = []
+        for etype in _ENTITY_TYPES_SCAN:
+            r = _rcon_query(
+                f'execute if entity @e[x={x},y={y},z={z},distance=..{radius},type=minecraft:{etype}]',
+                **rc
+            )
+            if 'passed' in r.lower():
+                count_m = re.search(r'Count:\s*(\d+)', r)
+                count = int(count_m.group(1)) if count_m else 1
+                found.append({'type': etype, 'count': count})
+        return {
+            'ok': True,
+            'results': [{
+                'player': player,
+                'scan_center': {'x': x, 'y': y, 'z': z},
+                'radius': radius,
+                'entities': found,
+                'total': sum(e['count'] for e in found),
+            }],
+        }
+    except Exception as e:
+        return {'ok': False, 'error': str(e), 'results': []}
+
+
+def tool_world_check_block(x: int, y: int, z: int, block_type: str) -> Dict[str, Any]:
+    """Check if a specific block type exists at coordinates."""
+    rc = _rcon_cfg()
+    try:
+        if not block_type.startswith('minecraft:'):
+            block_type = f'minecraft:{block_type}'
+        r = _rcon_query(f'execute if block {x} {y} {z} {block_type}', **rc)
+        return {
+            'ok': True,
+            'results': [{
+                'position': {'x': x, 'y': y, 'z': z},
+                'block_type': block_type,
+                'matches': 'passed' in r.lower(),
+            }],
+        }
+    except Exception as e:
+        return {'ok': False, 'error': str(e), 'results': []}
+
+
+def tool_world_server_state() -> Dict[str, Any]:
+    """Get server-level state: players, time, worldborder, difficulty."""
+    rc = _rcon_cfg()
+    try:
+        players_raw = _rcon_query('list', **rc)
+        time_raw = _rcon_query('time query daytime', **rc)
+        border_raw = _rcon_query('worldborder get', **rc)
+        diff_raw = _rcon_query('difficulty', **rc)
+
+        # Parse player list
+        players = []
+        m = re.search(r'online:\s*(.*)', players_raw)
+        if m and m.group(1).strip():
+            players = [p.strip() for p in m.group(1).split(',') if p.strip()]
+        count_m = re.search(r'(\d+) of a max of (\d+)', players_raw)
+        count = int(count_m.group(1)) if count_m else len(players)
+        max_players = int(count_m.group(2)) if count_m else 20
+
+        # Parse time
+        time_m = re.search(r'(\d+)', time_raw)
+        ticks = int(time_m.group(1)) if time_m else 0
+        # Convert to approximate in-game time (0=6:00, 6000=noon, 12000=18:00, 18000=midnight)
+        hours = ((ticks + 6000) % 24000) // 1000
+        is_night = ticks >= 13000 or ticks < 0
+
+        # Parse worldborder
+        border_m = re.search(r'(\d+)', border_raw)
+        border = int(border_m.group(1)) if border_m else None
+
+        # Parse difficulty
+        diff_m = re.search(r'difficulty is (\w+)', diff_raw)
+        difficulty = diff_m.group(1) if diff_m else 'unknown'
+
+        return {
+            'ok': True,
+            'results': [{
+                'players_online': players,
+                'player_count': count,
+                'max_players': max_players,
+                'time_ticks': ticks,
+                'approx_hour': hours,
+                'is_night': is_night,
+                'worldborder_width': border,
+                'difficulty': difficulty,
+            }],
+        }
+    except Exception as e:
+        return {'ok': False, 'error': str(e), 'results': []}
+
+
 def tool_local_search(query: str) -> Dict[str, Any]:
     try:
         rows = _kb_search(query, limit=5)
@@ -673,6 +871,33 @@ def _tool_router(user_text: str, max_steps: int, mode: str, context: Dict[str, A
     if max_steps <= 0:
         return calls
 
+    # --- World observation tools (RCON-based) ---
+    # In sudo mode, get player info for position-aware command generation
+    world_enabled = bool(CFG.get('world_observation_enabled', True))
+    if world_enabled and mode == 'sudo':
+        player = str((context or {}).get('player') or '').strip()
+        if not player:
+            # Try to extract player from server_state context
+            ss = (context or {}).get('server_state') or {}
+            players = ss.get('online_players') or []
+            if players:
+                player = players[0] if len(players) == 1 else ''
+        if player:
+            # Always get player info for sudo -- position is critical for build/fill/tp commands
+            calls.append({'tool': 'world.player_info', 'player': player})
+            # Scan nearby entities if the request involves mobs, entities, or environmental awareness
+            if any(k in text for k in [
+                'mob', 'monster', 'entity', 'creature', 'animal', 'kill', 'clear',
+                'around', 'nearby', 'surround', 'area', 'here', 'near me',
+                'spawn', 'summon', 'destroy', 'nuke', 'tnt', 'protect', 'safe',
+            ]):
+                calls.append({'tool': 'world.nearby_entities', 'player': player, 'radius': 30})
+
+    # In god/god_system mode, get server state for contextual awareness
+    if world_enabled and mode in ('god', 'god_system'):
+        calls.append({'tool': 'world.server_state'})
+
+    # --- Knowledge tools ---
     if mode == 'sudo':
         q = user_text
         req = str((context or {}).get('request') or '').strip()
@@ -707,7 +932,10 @@ def _commands_prompt(mode: str) -> str:
             'You may output template workflow meta-commands: template search <query>, template pick <n> [name], template build <name>.\n'
             'For build/make/create requests, prefer the template workflow instead of raw block-by-block commands.\n'
             'If request is ambiguous or unsupported, choose a closest valid in-game workaround and keep scope bounded.\n'
-            'If still unsafe/unknown, return empty commands.'
+            'If still unsafe/unknown, return empty commands.\n'
+            'WORLD STATE: If world.player_info or world.nearby_entities tool results are present, use the player\'s '
+            'actual coordinates for fill/setblock/tp commands instead of ~ ~ ~ relative coords when absolute positioning '
+            'is more reliable. Use nearby entity info to make contextually aware decisions.'
         )
 
     if mode == 'god_system':
@@ -827,6 +1055,7 @@ def run_pipeline(session: SessionState, req: MessageRequest) -> MessageResponse:
         for c in calls:
             tool = c['tool']
             q = c.get('query', '')
+            tool_input_desc = q  # default description for trace
             if tool == 'web.search':
                 out = tool_web_search(q)
             elif tool == 'minecraft.wiki_lookup':
@@ -835,10 +1064,27 @@ def run_pipeline(session: SessionState, req: MessageRequest) -> MessageResponse:
                 out = tool_local_search(q)
             elif tool == 'local.read':
                 out = tool_local_read(str(c.get('doc_id', '')), q)
+            elif tool == 'world.player_info':
+                p = str(c.get('player', ''))
+                tool_input_desc = p
+                out = tool_world_player_info(p)
+            elif tool == 'world.nearby_entities':
+                p = str(c.get('player', ''))
+                r = int(c.get('radius', 30))
+                tool_input_desc = f'{p} radius={r}'
+                out = tool_world_nearby_entities(p, r)
+            elif tool == 'world.check_block':
+                bx, by, bz = int(c.get('x', 0)), int(c.get('y', 0)), int(c.get('z', 0))
+                bt = str(c.get('block_type', ''))
+                tool_input_desc = f'{bx},{by},{bz} {bt}'
+                out = tool_world_check_block(bx, by, bz, bt)
+            elif tool == 'world.server_state':
+                tool_input_desc = 'server'
+                out = tool_world_server_state()
             else:
                 out = {'ok': False, 'error': 'unknown tool', 'results': []}
-            tool_trace.append({'tool': tool, 'input': q, 'ok': out.get('ok', False), 'results_count': len(out.get('results', []))})
-            tool_results_block += f"\nTOOL {tool} query={q}\nRESULT={json.dumps(out, ensure_ascii=True)[:3000]}\n"
+            tool_trace.append({'tool': tool, 'input': tool_input_desc, 'ok': out.get('ok', False), 'results_count': len(out.get('results', []))})
+            tool_results_block += f"\nTOOL {tool} query={tool_input_desc}\nRESULT={json.dumps(out, ensure_ascii=True)[:3000]}\n"
 
             # localized retrieval hop: after index search, fetch one top document excerpt
             if tool == 'local.search' and out.get('ok') and out.get('results') and len(tool_trace) < max(0, min(req.max_tool_steps, 6)):
@@ -849,37 +1095,59 @@ def run_pipeline(session: SessionState, req: MessageRequest) -> MessageResponse:
                     tool_trace.append({'tool': 'local.read', 'input': doc_id, 'ok': read_out.get('ok', False), 'results_count': len(read_out.get('results', []))})
                     tool_results_block += f"\nTOOL local.read doc_id={doc_id}\nRESULT={json.dumps(read_out, ensure_ascii=True)[:3000]}\n"
 
-    # Commands call
-    cmd_messages = [
-        {'role': 'system', 'content': _commands_prompt(session.mode)},
-        *session.messages[-12:],
-        {'role': 'user', 'content': user_blob + tool_results_block},
-    ]
-    cmd_raw = _ollama_chat(
-        CFG.get('command_model', 'qwen3-coder:30b'),
-        cmd_messages,
-        fmt='json',
-        temperature=0.2,
-        max_tokens=220,
-    )
-    cmd_parsed = _parse_json(cmd_raw)
-    commands = _sanitize_commands(cmd_parsed.get('commands') or [], session.mode)
+    # Single-call mode: one LLM call returns both commands and message
+    if CFG.get('single_call', False):
+        combined_prompt = _commands_prompt(session.mode)
+        if session.mode != 'sudo':
+            combined_prompt += '\n\nAlso include a "message" field with a dramatic in-character response.'
 
-    # Message call (not for sudo)
-    message = None
-    if session.mode != 'sudo':
-        msg_messages = [
-            {'role': 'system', 'content': _message_prompt(session.mode)},
+        sc_messages = [
+            {'role': 'system', 'content': combined_prompt},
             *session.messages[-12:],
-            {'role': 'user', 'content': user_blob + f"\nChosen commands: {commands}" + tool_results_block},
+            {'role': 'user', 'content': user_blob + tool_results_block},
         ]
-        message = _ollama_chat(
-            CFG.get('message_model', 'gemma3:12b'),
-            msg_messages,
-            fmt=None,
-            temperature=0.8,
-            max_tokens=500,
-        ).strip()
+        sc_raw = _ollama_chat(
+            CFG.get('command_model', CFG.get('model', 'mortdecai-v4')),
+            sc_messages,
+            fmt='json',
+            temperature=0.3,
+            max_tokens=600,
+        )
+        sc_parsed = _parse_json(sc_raw)
+        commands = _sanitize_commands(sc_parsed.get('commands') or [], session.mode)
+        message = sc_parsed.get('message') or None
+    else:
+        # Two-call mode: separate command and message calls
+        cmd_messages = [
+            {'role': 'system', 'content': _commands_prompt(session.mode)},
+            *session.messages[-12:],
+            {'role': 'user', 'content': user_blob + tool_results_block},
+        ]
+        cmd_raw = _ollama_chat(
+            CFG.get('command_model', 'qwen3-coder:30b'),
+            cmd_messages,
+            fmt='json',
+            temperature=0.2,
+            max_tokens=220,
+        )
+        cmd_parsed = _parse_json(cmd_raw)
+        commands = _sanitize_commands(cmd_parsed.get('commands') or [], session.mode)
+
+        # Message call (not for sudo)
+        message = None
+        if session.mode != 'sudo':
+            msg_messages = [
+                {'role': 'system', 'content': _message_prompt(session.mode)},
+                *session.messages[-12:],
+                {'role': 'user', 'content': user_blob + f"\nChosen commands: {commands}" + tool_results_block},
+            ]
+            message = _ollama_chat(
+                CFG.get('message_model', 'gemma3:12b'),
+                msg_messages,
+                fmt=None,
+                temperature=0.8,
+                max_tokens=500,
+            ).strip()
 
     # Save assistant summary back to session memory
     session.messages.append({
diff --git a/mc_aigod_paper.py b/mc_aigod_paper.py
index 6911a69..ab17af8 100644
--- a/mc_aigod_paper.py
+++ b/mc_aigod_paper.py
@@ -3687,11 +3687,25 @@ def _is_rcon_error(result: str) -> bool:
 
 
 _ERROR_CORRECTION_SYSTEM = (
-    "A Minecraft command failed. Analyze the error and return a corrected command.\n"
+    "A Minecraft 1.21 command failed with an RCON error. Your job: return a DIFFERENT, corrected command.\n"
+    "Do NOT return the same command. Analyze the error and fix the syntax.\n\n"
     "Respond with JSON: {\"corrected\": \"the fixed command\"}\n"
-    "The command must be a single complete string. Use minecraft: prefix for all items/effects.\n"
-    "Use 1.21 syntax: enchantments use [enchantments={name:level}] NOT {Enchantments:[...]}.\n"
-    "If you cannot fix it, return {\"corrected\": \"\"}."
+    "If you cannot fix it, return {\"corrected\": \"\"}.\n\n"
+    "Common fixes:\n"
+    "- 'Incorrect argument for command' → wrong arg order or missing subcommand\n"
+    "  xp player 100 → xp add player 100 levels\n"
+    "  gamemode player survival → gamemode survival player\n"
+    "- 'Unknown item' → missing minecraft: prefix or wrong item name\n"
+    "  give player diamond → give player minecraft:diamond 1\n"
+    "  bed → minecraft:white_bed, log → minecraft:oak_log\n"
+    "- 'Expected whitespace' → count before enchantments or bad syntax\n"
+    "  give player sword 1[enchantments=...] → give player sword[enchantments=...] 1\n"
+    "- 'Unknown enchantment/effect' → wrong name\n"
+    "  sharp → sharpness, prot → protection, speed_boost → speed\n"
+    "- Old NBT format → use 1.21 component syntax\n"
+    "  {Enchantments:[...]} → [enchantments={name:level}]\n"
+    "- Missing 'give' subcommand for effects\n"
+    "  effect player speed → effect give player minecraft:speed 30 1\n"
 )
 
 def _attempt_error_correction(failed_cmd: str, error_msg: str, config: dict) -> str: