Send GMCP Char.Vitals after each command

- Add Where: header with zone description
- Add Location: line with quadrant and coordinates
- Add Nearby: line showing entities in viewport (not on player's tile)
- Add Exits: line showing available cardinal directions
- Replace 'Here:' with individual entity lines showing posture
- Replace 'Portals:' with individual 'You see {name}.' lines
- Add look <thing> routing to examine command
- Add comprehensive tests for new structured output
- Update existing tests to match new output format

content/commands/prompt.toml

@@ -0,0 +1,4 @@
+name = "prompt"
+help = "view or customize your prompt"
+mode = "*"
+handler = "mudlib.commands.prompt:cmd_prompt"

src/mudlib/commands/edit.py

@@ -60,7 +60,7 @@ async def cmd_edit(player: Player, args: str) -> None:
     player.editor = Editor(
         save_callback=save_callback_fn,
         content_type=content_type,
-        color_depth=player.color_depth,
+        color_depth=player.color_depth or "16",
         initial_content=initial_content,
     )
     player.mode_stack.append("editor")

src/mudlib/commands/look.py

@@ -1,11 +1,19 @@
 """Look command for viewing the world."""
 
 from mudlib.commands import CommandDefinition, register
+from mudlib.commands.examine import cmd_examine
 from mudlib.commands.things import _format_thing_name
 from mudlib.effects import get_effects_at
 from mudlib.entity import Entity
 from mudlib.player import Player
 from mudlib.render.ansi import RESET, colorize_terrain
+from mudlib.render.room import (
+    render_entity_lines,
+    render_exits,
+    render_location,
+    render_nearby,
+    render_where,
+)
 from mudlib.thing import Thing
 from mudlib.zone import Zone
 
@@ -19,8 +27,13 @@ async def cmd_look(player: Player, args: str) -> None:
 
     Args:
         player: The player executing the command
-        args: Command arguments (unused for now)
+        args: Command arguments (if provided, route to examine)
     """
+    # If args provided, route to examine
+    if args.strip():
+        await cmd_examine(player, args)
+        return
+
     zone = player.location
     if zone is None or not isinstance(zone, Zone):
         player.writer.write("You are nowhere.\r\n")
@@ -80,10 +93,10 @@ async def cmd_look(player: Player, args: str) -> None:
         for x, tile in enumerate(row):
             # Check if this is the player's position
             if x == center_x and y == center_y:
-                line.append(colorize_terrain("@", player.color_depth))
+                line.append(colorize_terrain("@", player.color_depth or "16"))
             # Check if this is another entity's position
             elif (x, y) in entity_positions:
-                line.append(colorize_terrain("*", player.color_depth))
+                line.append(colorize_terrain("*", player.color_depth or "16"))
             else:
                 # Check for active effects at this world position
                 world_x, world_y = zone.wrap(
@@ -96,11 +109,41 @@ async def cmd_look(player: Player, args: str) -> None:
                     e = effects[-1]
                     line.append(f"{e.color}{e.char}{RESET}")
                 else:
-                    line.append(colorize_terrain(tile, player.color_depth))
+                    line.append(colorize_terrain(tile, player.color_depth or "16"))
         output_lines.append("".join(line))
 
+    # Build structured output
+    output = []
+
+    # Where header
+    output.append(render_where(zone.description))
+
+    # Viewport
+    output.append("\r\n".join(output_lines))
+
+    # Location line
+    output.append(render_location(zone, player.x, player.y))
+
+    # Collect nearby entities (in viewport but not on player's tile)
+    nearby_entities = [
+        obj
+        for obj in nearby
+        if isinstance(obj, Entity)
+        and obj is not player
+        and (not hasattr(obj, "alive") or obj.alive)
+        and not (obj.x == player.x and obj.y == player.y)
+    ]
+    if nearby_entities:
+        output.append(render_nearby(nearby_entities, player))
+
+    # Exits line
+    output.append(render_exits(zone, player.x, player.y))
+
     # Send to player
-    player.writer.write("\r\n".join(output_lines) + "\r\n")
+    player.writer.write("\r\n".join(output) + "\r\n")
+
+    # Blank line before entity/item details
+    player.writer.write("\r\n")
 
     # Show entities (mobs, other players) at the player's position
     entities_here = [
@@ -111,8 +154,9 @@ async def cmd_look(player: Player, args: str) -> None:
         and (not hasattr(obj, "alive") or obj.alive)
     ]
     if entities_here:
-        names = ", ".join(e.name for e in entities_here)
-        player.writer.write(f"Here: {names}\r\n")
+        entity_lines = render_entity_lines(entities_here, player)
+        # Convert \n to \r\n for telnet
+        player.writer.write(entity_lines.replace("\n", "\r\n") + "\r\n")
 
     # Show items on the ground at player's position
     from mudlib.portal import Portal
@@ -130,8 +174,8 @@ async def cmd_look(player: Player, args: str) -> None:
         player.writer.write(f"On the ground: {names}\r\n")
 
     if portals:
-        names = ", ".join(p.name for p in portals)
-        player.writer.write(f"Portals: {names}\r\n")
+        for portal in portals:
+            player.writer.write(f"You see {portal.name}.\r\n")
 
     await player.writer.drain()
 

src/mudlib/commands/prompt.py

@@ -0,0 +1,51 @@
+"""Prompt customization command."""
+
+from mudlib.player import Player
+from mudlib.prompt import DEFAULT_TEMPLATES
+
+
+async def cmd_prompt(player: Player, args: str) -> None:
+    """View or customize the player's prompt.
+
+    With no arguments, shows the current template and available variables.
+    With a template string, sets the player's custom prompt.
+    With 'reset', clears the custom template back to mode default.
+    """
+    args = args.strip()
+
+    if not args:
+        # Show current template and available variables
+        current = player.prompt_template or DEFAULT_TEMPLATES.get(
+            player.mode, "{stamina_gauge} {pl} > "
+        )
+        msg = f"Current prompt: {current}\r\n\r\n"
+        msg += "Available variables:\r\n"
+        msg += "  stamina_pct - stamina percentage (0-100)\r\n"
+        msg += "  stamina - current stamina value\r\n"
+        msg += "  max_stamina - maximum stamina\r\n"
+        msg += "  stamina_gauge - colored stamina percentage\r\n"
+        msg += "  pl - current power level\r\n"
+        msg += "  max_pl - maximum power level\r\n"
+        msg += "  name - your character name\r\n"
+        msg += "  mode - current mode (normal, combat, etc)\r\n"
+        msg += "  x, y - coordinates\r\n"
+        msg += "  opponent - combat opponent name\r\n"
+        msg += "  move - current attack/defense move\r\n"
+        msg += "  combat_state - combat state (idle/fighting)\r\n"
+        msg += "\r\n"
+        msg += "Examples:\r\n"
+        msg += "  prompt {stamina_gauge} {pl} >           (simple, default)\r\n"
+        msg += "  prompt {stamina_gauge} {pl}/{max_pl} [{name}] >  (full)\r\n"
+        msg += "  prompt reset                            (back to default)\r\n"
+        await player.send(msg)
+        return
+
+    if args.lower() == "reset":
+        # Clear custom template
+        player.prompt_template = None
+        await player.send("Prompt reset to default.\r\n")
+        return
+
+    # Set custom template
+    player.prompt_template = args
+    await player.send(f"Prompt set to: {args}\r\n")

src/mudlib/entity.py

@@ -26,6 +26,31 @@ class Entity(Object):
     defense_locked_until: float = 0.0  # monotonic time when defense recovery ends
     resting: bool = False  # whether this entity is currently resting
 
+    @property
+    def posture(self) -> str:
+        """Return entity's current posture for room display.
+
+        Priority order: unconscious > fighting > flying > resting > standing
+        """
+        # Unconscious (highest priority)
+        if self.pl <= 0 or self.stamina <= 0:
+            return "unconscious"
+
+        # Fighting (only for Player with mode="combat")
+        if hasattr(self, "mode") and self.mode == "combat":
+            return "fighting"
+
+        # Flying (only for Player)
+        if getattr(self, "flying", False):
+            return "flying"
+
+        # Resting
+        if self.resting:
+            return "resting"
+
+        # Default
+        return "standing"
+
     def can_accept(self, obj: Object) -> bool:
         """Entities accept portable Things (inventory)."""
         from mudlib.thing import Thing

src/mudlib/player.py

@@ -30,6 +30,7 @@ class Player(Entity):
     paint_mode: bool = False
     painting: bool = False
     paint_brush: str = "."
+    prompt_template: str | None = None
     _last_msdp: dict = field(default_factory=dict, repr=False)
 
     @property
@@ -38,8 +39,10 @@ class Player(Entity):
         return self.mode_stack[-1]
 
     @property
-    def color_depth(self) -> str:
-        """Best available color mode: truecolor, 256, or 16."""
+    def color_depth(self) -> str | None:
+        """Best available color mode: truecolor, 256, 16, or None if no ANSI."""
+        if not self.caps.ansi:
+            return None
         return self.caps.color_depth
 
     async def send(self, message: str) -> None:

src/mudlib/prompt.py

@@ -0,0 +1,113 @@
+"""Pure functions for prompt rendering."""
+
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from mudlib.render.colors import colorize
+
+if TYPE_CHECKING:
+    from mudlib.player import Player
+
+# Default prompt templates by mode
+DEFAULT_TEMPLATES: dict[str, str] = {
+    "normal": "{stamina_gauge} {pl} > ",
+    "combat": "{stamina_gauge} {pl} vs {opponent} > ",
+    "editor": "editor> ",
+    "if": "> ",
+}
+
+
+def render_prompt(player: Player) -> str:
+    """Render the prompt string based on player state and mode.
+
+    Args:
+        player: The player whose prompt to render
+
+    Returns:
+        Formatted prompt string with ANSI codes based on player color support
+    """
+    # Get template from player override or mode default
+    template = player.prompt_template or DEFAULT_TEMPLATES.get(
+        player.mode, "{stamina_gauge} {pl} > "
+    )
+
+    # Build variable dictionary
+    stamina_pct = (
+        int((player.stamina / player.max_stamina) * 100)
+        if player.max_stamina > 0
+        else 0
+    )
+
+    # Compute stamina gauge with conditional coloring
+    if stamina_pct >= 60:
+        stamina_gauge = f"{{green}}<{stamina_pct}%>{{/}}"
+    elif stamina_pct >= 30:
+        stamina_gauge = f"{{yellow}}<{stamina_pct}%>{{/}}"
+    else:
+        stamina_gauge = f"{{red}}<{stamina_pct}%>{{/}}"
+
+    variables = {
+        "stamina_pct": str(stamina_pct),
+        "stamina": str(round(player.stamina)),
+        "max_stamina": str(round(player.max_stamina)),
+        "stamina_gauge": stamina_gauge,
+        "pl": str(round(player.pl)),
+        "max_pl": str(round(player.max_pl)),
+        "opponent": _get_opponent_name(player),
+        "move": "",  # TODO: current attack/defense move name
+        "name": player.name,
+        "mode": player.mode,
+        "x": str(player.x),
+        "y": str(player.y),
+        "combat_state": _get_combat_state(player),
+    }
+
+    # Substitute variables in template
+    result = template
+    for key, value in variables.items():
+        result = result.replace(f"{{{key}}}", value)
+
+    # Process color tags based on player's color support
+    result = colorize(result, player.color_depth)
+
+    return result
+
+
+def _get_opponent_name(player: Player) -> str:
+    """Get the name of the player's combat opponent if any.
+
+    Args:
+        player: The player to check
+
+    Returns:
+        Opponent name if in combat, empty string otherwise
+    """
+    from mudlib.combat.engine import get_encounter
+
+    encounter = get_encounter(player)
+    if encounter is None:
+        return ""
+
+    # Determine who the opponent is (the other entity in the encounter)
+    if encounter.attacker is player:
+        return encounter.defender.name
+    return encounter.attacker.name
+
+
+def _get_combat_state(player: Player) -> str:
+    """Get the current combat state for the player.
+
+    Args:
+        player: The player to check
+
+    Returns:
+        Combat state string: "idle", "telegraph", "window", or "resolve"
+    """
+    from mudlib.combat.engine import get_encounter
+
+    encounter = get_encounter(player)
+    if encounter is None:
+        return "idle"
+
+    return encounter.state.value

src/mudlib/render/colors.py

@@ -0,0 +1,116 @@
+"""Color markup engine for prompt templates."""
+
+import re
+
+from mudlib.render import ansi
+
+# Tag to ANSI code mapping for 16-color mode
+COLOR_TAGS_16 = {
+    "red": ansi.RED,
+    "green": ansi.GREEN,
+    "yellow": ansi.YELLOW,
+    "blue": ansi.BLUE,
+    "magenta": ansi.MAGENTA,
+    "cyan": ansi.CYAN,
+    "white": ansi.WHITE,
+    "black": ansi.BLACK,
+    "RED": "\033[91m",
+    "GREEN": "\033[92m",
+    "YELLOW": "\033[93m",
+    "BLUE": "\033[94m",
+    "MAGENTA": "\033[95m",
+    "CYAN": "\033[96m",
+    "WHITE": "\033[97m",
+    "BLACK": "\033[90m",
+    "bold": ansi.BOLD,
+    "dim": "\033[2m",
+    "/": ansi.RESET,
+    "reset": ansi.RESET,
+}
+
+# Tag to ANSI code mapping for 256-color mode
+COLOR_TAGS_256 = {
+    "red": ansi.fg_256(196),
+    "green": ansi.fg_256(46),
+    "yellow": ansi.fg_256(226),
+    "blue": ansi.fg_256(33),
+    "magenta": ansi.fg_256(201),
+    "cyan": ansi.fg_256(51),
+    "white": ansi.fg_256(231),
+    "black": ansi.fg_256(16),
+    "RED": ansi.fg_256(9),
+    "GREEN": ansi.fg_256(10),
+    "YELLOW": ansi.fg_256(11),
+    "BLUE": ansi.fg_256(12),
+    "MAGENTA": ansi.fg_256(13),
+    "CYAN": ansi.fg_256(14),
+    "WHITE": ansi.fg_256(15),
+    "BLACK": ansi.fg_256(8),
+    "bold": ansi.BOLD,
+    "dim": "\033[2m",
+    "/": ansi.RESET,
+    "reset": ansi.RESET,
+}
+
+# Tag to ANSI code mapping for truecolor mode
+COLOR_TAGS_TRUECOLOR = {
+    "red": ansi.fg_rgb(244, 67, 54),
+    "green": ansi.fg_rgb(76, 175, 80),
+    "yellow": ansi.fg_rgb(255, 235, 59),
+    "blue": ansi.fg_rgb(33, 150, 243),
+    "magenta": ansi.fg_rgb(156, 39, 176),
+    "cyan": ansi.fg_rgb(0, 188, 212),
+    "white": ansi.fg_rgb(255, 255, 255),
+    "black": ansi.fg_rgb(0, 0, 0),
+    "RED": ansi.fg_rgb(255, 82, 82),
+    "GREEN": ansi.fg_rgb(105, 240, 174),
+    "YELLOW": ansi.fg_rgb(255, 255, 130),
+    "BLUE": ansi.fg_rgb(68, 138, 255),
+    "MAGENTA": ansi.fg_rgb(224, 64, 251),
+    "CYAN": ansi.fg_rgb(0, 229, 255),
+    "WHITE": ansi.fg_rgb(255, 255, 255),
+    "BLACK": ansi.fg_rgb(96, 96, 96),
+    "bold": ansi.BOLD,
+    "dim": "\033[2m",
+    "/": ansi.RESET,
+    "reset": ansi.RESET,
+}
+
+
+def colorize(text: str, color_depth: str | None) -> str:
+    """Convert color markup tags to ANSI codes based on client color depth.
+
+    Processes markup tags like {red}, {bold}, {/} in template strings and
+    converts them to ANSI escape codes. Unknown tags that don't match known
+    color tags are preserved (assumed to be template variables like {hp}).
+
+    Args:
+        text: String with color markup tags
+        color_depth: Color mode - "16", "256", "truecolor", or None/empty to strip
+
+    Returns:
+        Text with markup tags replaced by ANSI codes (or stripped if no color support)
+    """
+    # If no color support, strip all known color tags
+    if not color_depth:
+        # Build pattern of all known tag names
+        known_tags = set(COLOR_TAGS_16.keys())
+        pattern = r"\{(" + "|".join(re.escape(tag) for tag in known_tags) + r")\}"
+        return re.sub(pattern, "", text)
+
+    # Select tag mapping based on color depth
+    if color_depth == "truecolor":
+        tag_map = COLOR_TAGS_TRUECOLOR
+    elif color_depth == "256":
+        tag_map = COLOR_TAGS_256
+    else:  # default to 16-color
+        tag_map = COLOR_TAGS_16
+
+    # Replace known color tags with ANSI codes
+    def replace_tag(match):
+        return tag_map[match.group(1)]
+
+    # Pattern matches {tagname} where tagname is in our known tags
+    known_tags = "|".join(re.escape(tag) for tag in tag_map)
+    pattern = r"\{(" + known_tags + r")\}"
+    return re.sub(pattern, replace_tag, text)

src/mudlib/render/room.py

@@ -0,0 +1,139 @@
+"""Pure functions for structured room display."""
+
+from __future__ import annotations
+
+
+def render_where(zone_name: str) -> str:
+    """Render the zone description line.
+
+    Args:
+        zone_name: The zone's description/name to display
+
+    Returns:
+        Formatted string like "Where: The Overworld"
+    """
+    return f"Where: {zone_name}"
+
+
+def render_location(zone, x: int, y: int) -> str:
+    """Render location with quadrant and coordinates.
+
+    Args:
+        zone: The zone object (needs width and height attributes)
+        x: X coordinate
+        y: Y coordinate
+
+    Returns:
+        Formatted string like "Location: northeast 47, 53"
+    """
+    # Calculate quadrant based on zone thirds
+    third_w = zone.width / 3
+    third_h = zone.height / 3
+
+    # Determine horizontal component (west/center/east)
+    if x < third_w:
+        h_part = "west"
+    elif x < 2 * third_w:
+        h_part = "center"
+    else:
+        h_part = "east"
+
+    # Determine vertical component (north/center/south)
+    if y < third_h:
+        v_part = "north"
+    elif y < 2 * third_h:
+        v_part = "center"
+    else:
+        v_part = "south"
+
+    # Combine into quadrant name
+    if h_part == "center" and v_part == "center":
+        quadrant = "center"
+    elif h_part == "center":
+        quadrant = v_part
+    elif v_part == "center":
+        quadrant = h_part
+    else:
+        quadrant = f"{v_part}{h_part}"
+
+    return f"Location: {quadrant} {x}, {y}"
+
+
+def render_nearby(entities: list, viewer) -> str:
+    """Render nearby entities line.
+
+    Args:
+        entities: List of entities in viewport but not on viewer's tile
+        viewer: The viewing entity (unused for now)
+
+    Returns:
+        Formatted string like "Nearby: (3) saibaman / Master Roshi / Goku"
+        or empty string if no nearby entities
+    """
+    if not entities:
+        return ""
+
+    count = len(entities)
+    names = " / ".join(entity.name for entity in entities)
+    return f"Nearby: ({count}) {names}"
+
+
+def render_exits(zone, x: int, y: int) -> str:
+    """Render available exits from current position.
+
+    Args:
+        zone: The zone object (needs is_passable method)
+        x: Current X coordinate
+        y: Current Y coordinate
+
+    Returns:
+        Formatted string like "Exits: north south east west"
+    """
+    exits = []
+
+    # Check cardinal directions
+    # NOTE: up/down exits deferred until z-axis movement is implemented
+    if zone.is_passable(x, y - 1):  # north (y decreases going up)
+        exits.append("north")
+    if zone.is_passable(x, y + 1):  # south
+        exits.append("south")
+    if zone.is_passable(x + 1, y):  # east
+        exits.append("east")
+    if zone.is_passable(x - 1, y):  # west
+        exits.append("west")
+
+    if exits:
+        return f"Exits: {' '.join(exits)}"
+    return "Exits:"
+
+
+_POSTURE_MESSAGES = {
+    "standing": "is standing here.",
+    "resting": "is resting here.",
+    "flying": "is flying above.",
+    "fighting": "is fighting here.",
+    "unconscious": "is unconscious.",
+}
+
+
+def render_entity_lines(entities: list, viewer) -> str:
+    """Render entity descriptions based on posture.
+
+    Args:
+        entities: List of entities on viewer's tile (excluding viewer)
+        viewer: The viewing entity (unused for now)
+
+    Returns:
+        Newline-separated entity descriptions, or empty string if none
+    """
+    if not entities:
+        return ""
+
+    lines = []
+    for entity in entities:
+        # Get posture with fallback to "standing"
+        posture = getattr(entity, "posture", "standing")
+        msg = _POSTURE_MESSAGES.get(posture, "is standing here.")
+        lines.append(f"{entity.name} {msg}")
+
+    return "\n".join(lines)

src/mudlib/server.py

@@ -45,6 +45,7 @@ from mudlib.if_session import broadcast_to_spectators
 from mudlib.mob_ai import process_mobs
 from mudlib.mobs import load_mob_templates, mob_templates
 from mudlib.player import Player, players
+from mudlib.prompt import render_prompt
 from mudlib.resting import process_resting
 from mudlib.store import (
     PlayerData,
@@ -391,10 +392,8 @@ async def shell(
             # Show appropriate prompt based on mode
             if player.mode == "editor" and player.editor:
                 _writer.write(f"  {player.editor.cursor + 1}> ")
-            elif player.mode == "if" and player.if_session:
-                _writer.write("> ")
             else:
-                _writer.write("mud> ")
+                _writer.write(render_prompt(player))
             await _writer.drain()
 
             inp = await readline2(_reader, _writer)
@@ -439,6 +438,8 @@ async def shell(
             else:
                 # Dispatch normal command
                 await mudlib.commands.dispatch(player, command)
+                # Update GMCP vitals after command (prompt shows vitals, so sync GMCP)
+                send_char_vitals(player)
 
             # Check if writer was closed by quit command
             if _writer.is_closing():

tests/test_colors.py

@@ -0,0 +1,128 @@
+"""Tests for color markup engine."""
+
+from mudlib.render.colors import colorize
+
+
+class TestColorize:
+    """Test the colorize markup processor."""
+
+    def test_basic_color_16(self):
+        """Test basic color tag in 16-color mode."""
+        result = colorize("{red}hello{/}", "16")
+        assert result == "\033[31mhello\033[0m"
+
+    def test_bold_16(self):
+        """Test bold tag in 16-color mode."""
+        result = colorize("{bold}test{/}", "16")
+        assert result == "\033[1mtest\033[0m"
+
+    def test_multiple_colors_16(self):
+        """Test multiple color tags in sequence."""
+        result = colorize("{green}hp{/} {red}sp{/}", "16")
+        assert result == "\033[32mhp\033[0m \033[31msp\033[0m"
+
+    def test_no_color_support(self):
+        """Test stripping tags when color_depth is None."""
+        result = colorize("{red}danger{/}", None)
+        assert result == "danger"
+
+    def test_nested_tags(self):
+        """Test nested tags - bold and red together."""
+        result = colorize("{bold}{red}critical{/}", "16")
+        assert result == "\033[1m\033[31mcritical\033[0m"
+
+    def test_plain_text_passthrough(self):
+        """Test plain text without tags passes through unchanged."""
+        result = colorize("plain text", "16")
+        assert result == "plain text"
+
+    def test_unknown_tags_preserved(self):
+        """Test unknown tags are preserved for template substitution."""
+        result = colorize("{fake}text{/}", "16")
+        assert result == "{fake}text\033[0m"
+
+    def test_multiple_resets(self):
+        """Test multiple reset tags work correctly."""
+        result = colorize("{red}one{/}{green}two{/}", "16")
+        assert result == "\033[31mone\033[0m\033[32mtwo\033[0m"
+
+    def test_reset_always_ansi_reset(self):
+        """Test {/} always maps to ANSI reset code."""
+        result = colorize("{/}", "16")
+        assert result == "\033[0m"
+
+    def test_256_color_mode(self):
+        """Test color tag works in 256-color mode."""
+        result = colorize("{green}hp{/}", "256")
+        # Should contain ANSI code (exact code may vary by implementation)
+        assert "\033[" in result
+        assert "hp" in result
+        assert "\033[0m" in result
+
+    def test_template_variables_preserved(self):
+        """Test that non-color tags like {stamina_pct} are preserved."""
+        result = colorize("{red}HP:{/} {hp_current}/{hp_max}", "16")
+        assert result == "\033[31mHP:\033[0m {hp_current}/{hp_max}"
+
+    def test_all_basic_colors(self):
+        """Test all basic color tags work."""
+        colors = ["red", "green", "yellow", "blue", "magenta", "cyan", "white", "black"]
+        for color in colors:
+            result = colorize(f"{{{color}}}text{{/}}", "16")
+            assert "\033[" in result
+            assert "text" in result
+            assert "\033[0m" in result
+
+    def test_dim_style(self):
+        """Test dim style tag."""
+        result = colorize("{dim}faded{/}", "16")
+        assert "\033[2m" in result
+        assert "faded" in result
+
+    def test_no_closing_tag(self):
+        """Test unclosed tag is handled gracefully."""
+        result = colorize("{red}no close", "16")
+        # Should process the opening tag even without close
+        assert "\033[31m" in result
+        assert "no close" in result
+
+    def test_color_depth_empty_string(self):
+        """Test empty string color_depth strips tags like None."""
+        result = colorize("{red}danger{/}", "")
+        assert result == "danger"
+
+    def test_reset_alias(self):
+        """Test {reset} works the same as {/}."""
+        result = colorize("{reset}", "16")
+        assert result == "\033[0m"
+        # Test in context
+        result2 = colorize("{red}text{reset}", "16")
+        assert result2 == "\033[31mtext\033[0m"
+
+    def test_bright_red_16(self):
+        """Test bright red in 16-color mode."""
+        result = colorize("{RED}bright{/}", "16")
+        assert result == "\033[91mbright\033[0m"
+
+    def test_all_bright_colors_16(self):
+        """Test all bright color variants work."""
+        bright_colors = [
+            "RED",
+            "GREEN",
+            "YELLOW",
+            "BLUE",
+            "MAGENTA",
+            "CYAN",
+            "WHITE",
+            "BLACK",
+        ]
+        for color in bright_colors:
+            result = colorize(f"{{{color}}}text{{/}}", "16")
+            assert "\033[" in result
+            assert "text" in result
+            assert "\033[0m" in result
+
+    def test_bright_colors_no_support(self):
+        """Test bright colors get stripped when no color support."""
+        result = colorize("{RED}bright{/} {GREEN}text{/}", None)
+        assert result == "bright text"

tests/test_commands.py

@@ -495,9 +495,9 @@ async def test_look_shows_entities_here(player, test_zone):
     await look.cmd_look(player, "")
 
     output = "".join(c[0][0] for c in player.writer.write.call_args_list)
-    assert "Here: " in output
-    assert "goblin" in output
-    assert "Ally" in output
+    # New format shows individual entity lines, not "Here: "
+    assert "goblin is standing here." in output
+    assert "Ally is standing here." in output
 
 
 @pytest.mark.asyncio

tests/test_entity_posture.py

@@ -0,0 +1,172 @@
+"""Tests for Entity.posture property."""
+
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from mudlib.entity import Entity, Mob
+from mudlib.player import Player
+
+
+@pytest.fixture
+def mock_writer():
+    writer = MagicMock()
+    writer.write = MagicMock()
+    writer.drain = AsyncMock()
+    return writer
+
+
+@pytest.fixture
+def mock_reader():
+    return MagicMock()
+
+
+def test_entity_default_posture():
+    """Entity with no special state should be 'standing'."""
+    entity = Entity(name="Test", x=0, y=0)
+    assert entity.posture == "standing"
+
+
+def test_entity_resting():
+    """Entity with resting=True should be 'resting'."""
+    entity = Entity(name="Test", x=0, y=0, resting=True)
+    assert entity.posture == "resting"
+
+
+def test_entity_unconscious_no_pl():
+    """Entity with pl <= 0 should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, pl=0.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_negative_pl():
+    """Entity with negative pl should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, pl=-10.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_no_stamina():
+    """Entity with stamina <= 0 should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, stamina=0.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_negative_stamina():
+    """Entity with negative stamina should be 'unconscious'."""
+    entity = Entity(name="Test", x=0, y=0, stamina=-5.0)
+    assert entity.posture == "unconscious"
+
+
+def test_entity_unconscious_beats_resting():
+    """Unconscious priority > resting priority."""
+    entity = Entity(name="Test", x=0, y=0, pl=0.0, resting=True)
+    assert entity.posture == "unconscious"
+
+
+def test_player_flying(mock_reader, mock_writer):
+    """Player with flying=True should be 'flying'."""
+    player = Player(
+        name="Test", x=0, y=0, reader=mock_reader, writer=mock_writer, flying=True
+    )
+    assert player.posture == "flying"
+
+
+def test_player_flying_beats_resting(mock_reader, mock_writer):
+    """Flying priority > resting priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        flying=True,
+        resting=True,
+    )
+    assert player.posture == "flying"
+
+
+def test_player_unconscious_beats_flying(mock_reader, mock_writer):
+    """Unconscious priority > flying priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        flying=True,
+        pl=0.0,
+    )
+    assert player.posture == "unconscious"
+
+
+def test_player_fighting_in_combat_mode(mock_reader, mock_writer):
+    """Player with mode='combat' should be 'fighting'."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+    )
+    assert player.posture == "fighting"
+
+
+def test_player_fighting_beats_flying(mock_reader, mock_writer):
+    """Fighting priority > flying priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+        flying=True,
+    )
+    assert player.posture == "fighting"
+
+
+def test_player_fighting_beats_resting(mock_reader, mock_writer):
+    """Fighting priority > resting priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+        resting=True,
+    )
+    assert player.posture == "fighting"
+
+
+def test_player_unconscious_beats_fighting(mock_reader, mock_writer):
+    """Unconscious priority > fighting priority."""
+    player = Player(
+        name="Test",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+        mode_stack=["normal", "combat"],
+        stamina=0.0,
+    )
+    assert player.posture == "unconscious"
+
+
+def test_mob_default_posture():
+    """Mob with default state should be 'standing'."""
+    mob = Mob(name="Goku", x=10, y=10, description="A fighter")
+    assert mob.posture == "standing"
+
+
+def test_mob_resting():
+    """Mob with resting=True should be 'resting'."""
+    mob = Mob(name="Goku", x=10, y=10, description="A fighter", resting=True)
+    assert mob.posture == "resting"
+
+
+def test_mob_unconscious():
+    """Mob with pl=0 should be 'unconscious'."""
+    mob = Mob(name="Goku", x=10, y=10, description="A fighter", pl=0.0)
+    assert mob.posture == "unconscious"

tests/test_look_command.py

@@ -0,0 +1,205 @@
+"""Tests for the look command with structured room display."""
+
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from mudlib.commands import look  # noqa: F401
+from mudlib.commands.look import cmd_look
+from mudlib.entity import Mob
+from mudlib.player import Player
+from mudlib.portal import Portal
+from mudlib.thing import Thing
+from mudlib.zone import Zone
+
+
+@pytest.fixture
+def mock_writer():
+    writer = MagicMock()
+    writer.write = MagicMock()
+    writer.drain = AsyncMock()
+    return writer
+
+
+@pytest.fixture
+def mock_reader():
+    return MagicMock()
+
+
+@pytest.fixture
+def test_zone():
+    """Create a test zone with simple terrain."""
+    # 50x50 zone with grass everywhere
+    terrain = [["." for _ in range(50)] for _ in range(50)]
+    # Add some mountains
+    terrain[10][10] = "^"
+    terrain[10][11] = "^"
+    return Zone(
+        name="test_zone",
+        description="The Test Zone",
+        width=50,
+        height=50,
+        terrain=terrain,
+        impassable={"^", "~"},
+    )
+
+
+@pytest.fixture
+def player(mock_reader, mock_writer, test_zone):
+    """Create a test player in the test zone."""
+    p = Player(
+        name="TestPlayer",
+        x=25,
+        y=25,
+        reader=mock_reader,
+        writer=mock_writer,
+    )
+    p.location = test_zone
+    test_zone._contents.append(p)
+    return p
+
+
+def get_output(player):
+    """Get all output written to player's writer."""
+    return "".join([call[0][0] for call in player.writer.write.call_args_list])
+
+
+@pytest.mark.asyncio
+async def test_look_includes_where_header(player):
+    """Look output should include 'Where: {zone description}' line."""
+    await cmd_look(player, "")
+    output = get_output(player)
+    assert "Where: The Test Zone" in output
+
+
+@pytest.mark.asyncio
+async def test_look_includes_location_line(player):
+    """Look output should include 'Location:' line with quadrant and coords."""
+    await cmd_look(player, "")
+    output = get_output(player)
+    assert "Location: center 25, 25" in output
+
+
+@pytest.mark.asyncio
+async def test_look_includes_exits_line(player):
+    """Look output should include 'Exits:' line."""
+    await cmd_look(player, "")
+    output = get_output(player)
+    assert "Exits: north south east west" in output
+
+
+@pytest.mark.asyncio
+async def test_look_shows_nearby_entities(player, test_zone):
+    """Look should show nearby entities (not on player's tile) in viewport."""
+    # Add some mobs in viewport range (location param auto-adds to zone)
+    Mob(name="Goku", x=26, y=25, location=test_zone)
+    Mob(name="Vegeta", x=27, y=26, location=test_zone)
+
+    await cmd_look(player, "")
+    output = get_output(player)
+
+    # Should see nearby line with count
+    assert "Nearby: (2)" in output
+    assert "Goku" in output
+    assert "Vegeta" in output
+
+
+@pytest.mark.asyncio
+async def test_look_shows_entities_here(player, test_zone):
+    """Look should show entities on player's tile with posture."""
+    # Add entities on player's tile (location param auto-adds to zone)
+    Mob(name="Krillin", x=25, y=25, resting=True, location=test_zone)
+    Mob(name="Piccolo", x=25, y=25, location=test_zone)
+
+    await cmd_look(player, "")
+    output = get_output(player)
+
+    # Should see individual lines with postures
+    assert "Krillin is resting here." in output
+    assert "Piccolo is standing here." in output
+
+
+@pytest.mark.asyncio
+async def test_look_shows_ground_items(player, test_zone):
+    """Look should show items on the ground."""
+    # Add an item on player's tile (location param auto-adds to zone)
+    Thing(name="rusty sword", x=25, y=25, location=test_zone)
+
+    await cmd_look(player, "")
+    output = get_output(player)
+
+    # Should see ground items
+    assert "rusty sword" in output
+
+
+@pytest.mark.asyncio
+async def test_look_shows_portals(player, test_zone):
+    """Look should show portals on player's tile."""
+    # Add a portal on player's tile (location param auto-adds to zone)
+    Portal(
+        name="wide dirt path",
+        x=25,
+        y=25,
+        location=test_zone,
+        target_zone="other",
+        target_x=0,
+        target_y=0,
+    )
+
+    await cmd_look(player, "")
+    output = get_output(player)
+
+    # Should see portal with new format
+    assert "You see wide dirt path." in output
+
+
+@pytest.mark.asyncio
+async def test_look_with_args_routes_to_examine(player, test_zone):
+    """look <thing> should route to examine command logic."""
+    # Add an item to examine (location param auto-adds to zone)
+    Thing(name="sword", x=25, y=25, description="A sharp blade.", location=test_zone)
+
+    await cmd_look(player, "sword")
+    output = get_output(player)
+
+    # Should see the item's description (examine behavior)
+    assert "A sharp blade." in output
+
+
+@pytest.mark.asyncio
+async def test_look_structure_order(player, test_zone):
+    """Look output should have sections in correct order."""
+    # Add entities and items (location param auto-adds to zone)
+    Mob(name="Goku", x=25, y=25, location=test_zone)
+
+    await cmd_look(player, "")
+    output = get_output(player)
+
+    # Find positions of key sections
+    where_pos = output.find("Where:")
+    location_pos = output.find("Location:")
+    exits_pos = output.find("Exits:")
+
+    # Verify order: Where comes first, then viewport (with terrain),
+    # then Location, then Exits
+    assert where_pos < location_pos
+    assert location_pos < exits_pos
+
+
+@pytest.mark.asyncio
+async def test_look_nowhere(mock_reader, mock_writer):
+    """Look should show 'You are nowhere.' when player has no location."""
+    # Create player without a location
+    player = Player(
+        name="NowherePlayer",
+        x=0,
+        y=0,
+        reader=mock_reader,
+        writer=mock_writer,
+    )
+    player.location = None
+
+    await cmd_look(player, "")
+    output = get_output(player)
+
+    assert "You are nowhere." in output

tests/test_portal_display.py

@@ -64,7 +64,8 @@ async def test_look_shows_portal_at_position(player, test_zone, mock_writer):
 
     await cmd_look(player, "")
     output = "".join([call[0][0] for call in mock_writer.write.call_args_list])
-    assert "portal" in output.lower() and "shimmering doorway" in output.lower()
+    # New format: "You see {portal.name}."
+    assert "you see shimmering doorway." in output.lower()
 
 
 @pytest.mark.asyncio

tests/test_prompt.py

@@ -0,0 +1,381 @@
+"""Tests for prompt rendering system."""
+
+from mudlib.caps import ClientCaps
+from mudlib.combat.encounter import CombatEncounter
+from mudlib.combat.engine import active_encounters
+from mudlib.entity import Entity
+from mudlib.player import Player
+from mudlib.prompt import render_prompt
+
+
+def setup_function():
+    """Clear global state before each test."""
+    active_encounters.clear()
+
+
+def teardown_function():
+    """Clear global state after each test."""
+    active_encounters.clear()
+
+
+def test_normal_mode_prompt():
+    """Normal mode shows stamina gauge and power level."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # 50% is in 30-59% range, should be yellow
+    assert result == "\033[33m<50%>\033[0m 200 > "
+
+
+def test_combat_mode_with_opponent():
+    """Combat mode includes opponent name."""
+    player = Player(
+        name="Goku",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal", "combat"],
+    )
+    opponent = Entity(name="Vegeta", pl=150.0)
+
+    encounter = CombatEncounter(attacker=player, defender=opponent)
+    active_encounters.append(encounter)
+
+    result = render_prompt(player)
+    # 50% is in 30-59% range, should be yellow
+    assert result == "\033[33m<50%>\033[0m 200 vs Vegeta > "
+
+
+def test_combat_mode_as_defender():
+    """Combat mode works when player is the defender."""
+    player = Player(
+        name="Goku",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal", "combat"],
+    )
+    opponent = Entity(name="Vegeta", pl=150.0)
+
+    encounter = CombatEncounter(attacker=opponent, defender=player)
+    active_encounters.append(encounter)
+
+    result = render_prompt(player)
+    # 50% is in 30-59% range, should be yellow
+    assert result == "\033[33m<50%>\033[0m 200 vs Vegeta > "
+
+
+def test_editor_mode_static_prompt():
+    """Editor mode returns static prompt."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal", "editor"],
+    )
+    result = render_prompt(player)
+    assert result == "editor> "
+
+
+def test_if_mode_static_prompt():
+    """IF mode returns minimal static prompt."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal", "if"],
+    )
+    result = render_prompt(player)
+    assert result == "> "
+
+
+def test_zero_stamina():
+    """Zero stamina renders as 0% in red."""
+    player = Player(
+        name="Test",
+        stamina=0.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # 0% is < 30%, should be red
+    assert result == "\033[31m<0%>\033[0m 200 > "
+
+
+def test_max_stamina():
+    """Full stamina renders as 100% in green."""
+    player = Player(
+        name="Test",
+        stamina=100.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # 100% is >= 60%, should be green
+    assert result == "\033[32m<100%>\033[0m 200 > "
+
+
+def test_fractional_percentage():
+    """Stamina percentage rounds to integer."""
+    player = Player(
+        name="Test",
+        stamina=33.3,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # 33% is in 30-59% range, should be yellow
+    assert result == "\033[33m<33%>\033[0m 200 > "
+
+
+def test_fractional_pl():
+    """Power level rounds to integer."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=199.7,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # 50% is in 30-59% range, should be yellow
+    assert result == "\033[33m<50%>\033[0m 200 > "
+
+
+def test_custom_template_overrides_default():
+    """Player can set custom prompt template."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+        prompt_template="[{pl}] > ",
+    )
+    result = render_prompt(player)
+    assert result == "[200] > "
+
+
+def test_custom_template_all_variables():
+    """Custom template can use all supported variables."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        max_pl=250.0,
+        mode_stack=["normal"],
+        prompt_template="{stamina}/{stamina_pct}% {pl}/{max_pl} > ",
+    )
+    result = render_prompt(player)
+    # No color tags in this custom template, so no ANSI codes
+    assert result == "50/50% 200/250 > "
+
+
+def test_unknown_variable_left_as_is():
+    """Unknown variables in template are not substituted."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+        prompt_template="{pl} {unknown} > ",
+    )
+    result = render_prompt(player)
+    assert result == "200 {unknown} > "
+
+
+def test_opponent_var_in_normal_mode_empty():
+    """Opponent variable is empty string when not in combat."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+        prompt_template="{pl} vs {opponent} > ",
+    )
+    result = render_prompt(player)
+    assert result == "200 vs  > "
+
+
+def test_no_color_support():
+    """Players with no ANSI support get tags stripped."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+        caps=ClientCaps(ansi=False),
+    )
+    result = render_prompt(player)
+    # Should have no ANSI codes, just text
+    assert result == "<50%> 200 > "
+    assert "\033[" not in result
+
+
+def test_stamina_gauge_green():
+    """Stamina >= 60% renders green gauge."""
+    player = Player(
+        name="Test",
+        stamina=80.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # Should have green color code
+    assert "\033[32m<80%>\033[0m" in result
+
+
+def test_stamina_gauge_yellow():
+    """Stamina 30-59% renders yellow gauge."""
+    player = Player(
+        name="Test",
+        stamina=45.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # Should have yellow color code
+    assert "\033[33m<45%>\033[0m" in result
+
+
+def test_stamina_gauge_red():
+    """Stamina < 30% renders red gauge."""
+    player = Player(
+        name="Test",
+        stamina=20.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # Should have red color code
+    assert "\033[31m<20%>\033[0m" in result
+
+
+def test_stamina_gauge_boundary_60():
+    """Stamina exactly 60% renders green."""
+    player = Player(
+        name="Test",
+        stamina=60.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # Should have green color code
+    assert "\033[32m<60%>\033[0m" in result
+
+
+def test_stamina_gauge_boundary_30():
+    """Stamina exactly 30% renders yellow."""
+    player = Player(
+        name="Test",
+        stamina=30.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # Should have yellow color code
+    assert "\033[33m<30%>\033[0m" in result
+
+
+def test_stamina_gauge_boundary_29():
+    """Stamina at 29% renders red."""
+    player = Player(
+        name="Test",
+        stamina=29.5,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    # Should have red color code
+    assert "\033[31m<29%>\033[0m" in result
+
+
+def test_zero_max_stamina():
+    """Zero max_stamina doesn't crash."""
+    player = Player(
+        name="Test",
+        stamina=0.0,
+        max_stamina=0.0,
+        pl=200.0,
+        mode_stack=["normal"],
+    )
+    result = render_prompt(player)
+    assert "0%" in result
+
+
+def test_name_variable():
+    """Name variable substitutes player name."""
+    player = Player(
+        name="Goku",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+        prompt_template="{name} > ",
+    )
+    result = render_prompt(player)
+    assert result == "Goku > "
+
+
+def test_mode_variable():
+    """Mode variable substitutes current mode."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal", "combat"],
+        prompt_template="[{mode}] > ",
+    )
+    result = render_prompt(player)
+    assert result == "[combat] > "
+
+
+def test_coordinates_variables():
+    """X and Y variables substitute coordinates."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+        x=42,
+        y=13,
+        prompt_template="({x},{y}) > ",
+    )
+    result = render_prompt(player)
+    assert result == "(42,13) > "
+
+
+def test_combat_state_idle():
+    """Combat state is 'idle' when not in combat."""
+    player = Player(
+        name="Test",
+        stamina=50.0,
+        max_stamina=100.0,
+        pl=200.0,
+        mode_stack=["normal"],
+        prompt_template="[{combat_state}] > ",
+    )
+    result = render_prompt(player)
+    assert result == "[idle] > "

tests/test_prompt_command.py

@@ -0,0 +1,76 @@
+"""Tests for the prompt command."""
+
+from unittest.mock import AsyncMock, MagicMock
+
+import pytest
+
+from mudlib.commands.prompt import cmd_prompt
+from mudlib.prompt import render_prompt
+
+
+@pytest.fixture
+def mock_writer():
+    writer = MagicMock()
+    writer.write = MagicMock()
+    writer.drain = AsyncMock()
+    return writer
+
+
+@pytest.fixture
+def mock_reader():
+    return MagicMock()
+
+
+@pytest.fixture
+def player(mock_reader, mock_writer):
+    from mudlib.player import Player
+
+    return Player(name="TestPlayer", x=5, y=5, reader=mock_reader, writer=mock_writer)
+
+
+@pytest.mark.asyncio
+async def test_prompt_bare_shows_current_and_variables(player):
+    """prompt with no args shows current template and available variables."""
+    await cmd_prompt(player, "")
+    output = "".join([call[0][0] for call in player.writer.write.call_args_list])
+    assert "current" in output.lower()
+    assert "variables" in output.lower() or "available" in output.lower()
+    # Should list some variables
+    assert "stamina" in output.lower()
+
+
+@pytest.mark.asyncio
+async def test_prompt_set_custom_template(player):
+    """prompt <template> sets player.prompt_template."""
+    custom = "{pl} >"
+    await cmd_prompt(player, custom)
+    assert player.prompt_template == custom
+    # Should confirm it was set
+    output = "".join([call[0][0] for call in player.writer.write.call_args_list])
+    assert "set" in output.lower() or "prompt" in output.lower()
+
+
+@pytest.mark.asyncio
+async def test_prompt_reset_clears_template(player):
+    """prompt reset clears player.prompt_template back to None."""
+    player.prompt_template = "{pl} > "
+    await cmd_prompt(player, "reset")
+    assert player.prompt_template is None
+    # Should confirm reset
+    output = "".join([call[0][0] for call in player.writer.write.call_args_list])
+    assert "reset" in output.lower() or "default" in output.lower()
+
+
+@pytest.mark.asyncio
+async def test_prompt_custom_template_used_in_render(player):
+    """After setting custom template, render_prompt uses it."""
+    custom = "[{stamina}] > "
+    player.prompt_template = custom
+    player.stamina = 50
+    player.max_stamina = 100
+    player.pl = 10
+    player.max_pl = 20
+
+    result = render_prompt(player)
+    # Should contain the stamina value from our custom template
+    assert "[50]" in result or "[50.0]" in result

tests/test_room_render.py

@@ -0,0 +1,171 @@
+"""Tests for room rendering functions."""
+
+from mudlib.entity import Mob
+from mudlib.render.room import (
+    render_entity_lines,
+    render_exits,
+    render_location,
+    render_nearby,
+    render_where,
+)
+from mudlib.zone import Zone
+
+
+def test_render_where():
+    """render_where returns 'Where: {zone description}'."""
+    zone = Zone(name="overworld", description="The Overworld")
+    assert render_where(zone.description) == "Where: The Overworld"
+
+    zone2 = Zone(name="cave", description="Dark Cave")
+    assert render_where(zone2.description) == "Where: Dark Cave"
+
+
+def test_render_location_center():
+    """render_location shows 'center' for positions near zone center."""
+    zone = Zone(name="test", width=50, height=50, terrain=[])
+    # Center should be around 25, 25 (middle third of both axes)
+    assert render_location(zone, 25, 25) == "Location: center 25, 25"
+    assert render_location(zone, 20, 20) == "Location: center 20, 20"
+    assert render_location(zone, 30, 30) == "Location: center 30, 30"
+
+
+def test_render_location_quadrants():
+    """render_location shows correct quadrants based on position."""
+    zone = Zone(name="test", width=60, height=60, terrain=[])
+    # Thirds: 0-19 west/north, 20-39 center, 40-59 east/south
+
+    # Northwest
+    assert render_location(zone, 5, 5) == "Location: northwest 5, 5"
+    assert render_location(zone, 10, 10) == "Location: northwest 10, 10"
+
+    # North (center horizontally, north vertically)
+    assert render_location(zone, 30, 5) == "Location: north 30, 5"
+
+    # Northeast
+    assert render_location(zone, 50, 5) == "Location: northeast 50, 5"
+
+    # West (west horizontally, center vertically)
+    assert render_location(zone, 5, 30) == "Location: west 5, 30"
+
+    # East
+    assert render_location(zone, 50, 30) == "Location: east 50, 30"
+
+    # Southwest
+    assert render_location(zone, 5, 50) == "Location: southwest 5, 50"
+
+    # South
+    assert render_location(zone, 30, 50) == "Location: south 30, 50"
+
+    # Southeast
+    assert render_location(zone, 50, 50) == "Location: southeast 50, 50"
+
+
+def test_render_nearby_empty():
+    """render_nearby returns empty string when no nearby entities."""
+    assert render_nearby([], None) == ""
+
+
+def test_render_nearby_single():
+    """render_nearby shows count and single entity name."""
+    mob = Mob(name="saibaman", x=10, y=10)
+    result = render_nearby([mob], None)
+    assert result == "Nearby: (1) saibaman"
+
+
+def test_render_nearby_multiple():
+    """render_nearby shows count and names separated by '/'."""
+    mobs = [
+        Mob(name="saibaman", x=10, y=10),
+        Mob(name="Master Roshi", x=11, y=10),
+        Mob(name="Goku", x=10, y=11),
+    ]
+    result = render_nearby(mobs, None)
+    assert result == "Nearby: (3) saibaman / Master Roshi / Goku"
+
+
+def test_render_exits_all_directions():
+    """render_exits shows all passable cardinal directions."""
+    # Create zone with all passable terrain (grass)
+    terrain = [["." for _ in range(10)] for _ in range(10)]
+    zone = Zone(
+        name="test", width=10, height=10, terrain=terrain, impassable={"^", "~"}
+    )
+
+    result = render_exits(zone, 5, 5)
+    assert result == "Exits: north south east west"
+
+
+def test_render_exits_blocked_directions():
+    """render_exits only shows passable directions."""
+    # Create zone with mountains (^) blocking some directions
+    terrain = [
+        [".", ".", ".", ".", "."],
+        [".", ".", "^", ".", "."],  # mountain north
+        [".", "^", ".", "^", "."],  # mountains west and east
+        [".", ".", "^", ".", "."],  # mountain south
+        [".", ".", ".", ".", "."],
+    ]
+    zone = Zone(name="test", width=5, height=5, terrain=terrain, impassable={"^", "~"})
+
+    # Position at center (2, 2) — surrounded by mountains
+    result = render_exits(zone, 2, 2)
+    assert result == "Exits:"  # no passable exits
+
+
+def test_render_exits_partial():
+    """render_exits shows only available exits."""
+    terrain = [
+        [".", ".", "."],
+        ["^", ".", "."],  # mountain to west
+        [".", "^", "."],  # mountain to south
+    ]
+    zone = Zone(name="test", width=3, height=3, terrain=terrain, impassable={"^"})
+
+    # Position at (1, 1) — north and east are passable
+    result = render_exits(zone, 1, 1)
+    assert result == "Exits: north east"
+
+
+def test_render_entity_lines_empty():
+    """render_entity_lines returns empty string when no entities."""
+    assert render_entity_lines([], None) == ""
+
+
+def test_render_entity_lines_single():
+    """render_entity_lines shows single entity with posture."""
+    mob = Mob(name="saibaman", x=10, y=10)
+    # Default posture is "standing" (fallback)
+    result = render_entity_lines([mob], None)
+    assert result == "saibaman is standing here."
+
+
+def test_render_entity_lines_multiple():
+    """render_entity_lines shows multiple entities, each on own line."""
+    # Create entities with different states that affect posture
+    mob1 = Mob(name="saibaman", x=10, y=10)  # standing by default
+    mob2 = Mob(name="Master Roshi", x=10, y=10, resting=True)  # resting
+
+    result = render_entity_lines([mob1, mob2], None)
+    lines = result.split("\n")
+    assert len(lines) == 2
+    assert lines[0] == "saibaman is standing here."
+    assert lines[1] == "Master Roshi is resting here."
+
+
+def test_render_entity_lines_postures():
+    """render_entity_lines handles different posture types based on entity state."""
+    # Standing (default state)
+    mob = Mob(name="Goku", x=10, y=10)
+    assert render_entity_lines([mob], None) == "Goku is standing here."
+
+    # Resting (resting=True)
+    mob_resting = Mob(name="Goku", x=10, y=10, resting=True)
+    assert render_entity_lines([mob_resting], None) == "Goku is resting here."
+
+    # Unconscious (pl <= 0)
+    mob_unconscious = Mob(name="Goku", x=10, y=10, pl=0)
+    assert render_entity_lines([mob_unconscious], None) == "Goku is unconscious."
+
+    # Unconscious (stamina <= 0)
+    mob_exhausted = Mob(name="Goku", x=10, y=10, stamina=0)
+    assert render_entity_lines([mob_exhausted], None) == "Goku is unconscious."