diff --git a/testbed/bridge.py b/testbed/bridge.py
new file mode 100644
index 0000000..fbe4c47
--- /dev/null
+++ b/testbed/bridge.py
@@ -0,0 +1,403 @@
+"""The testbed bridge: connects the AICC protocol to the room world.
+
+Registers the world tools (proprioception, vision, depth, hear, world_query,
+move, turn, look_at, interact) plus the conformance tools the scenario suite
+expects (echo, boom, bump). Subclasses ``aicc.Bridge`` only to learn which
+session is handling the current tool call, so tools can push async events
+(collision, audio) via ``emit_event``.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import base64
+import io
+import math
+from typing import Any, Literal
+
+from aicc.bridge import Bridge
+from aicc.protocol import TickMode, ToolClass
+from pydantic import BaseModel
+
+from testbed.room.render import Raycaster
+from testbed.room.world import Room
+
+VISION_WIDTH = 160
+VISION_HEIGHT = 120
+DEPTH_WIDTH = VISION_WIDTH // 4
+DEPTH_HEIGHT = VISION_HEIGHT // 4
+
+
+# ---------------------------------------------------------------------------
+# Typed tool outputs (advertised as output_schema in the manifest)
+# ---------------------------------------------------------------------------
+
+
+class Vec3(BaseModel):
+    x: float
+    y: float
+    z: float
+
+
+class Rotation(BaseModel):
+    yaw_deg: float
+    pitch_deg: float
+
+
+class ProprioceptionOutput(BaseModel):
+    position: Vec3
+    rotation: Rotation
+    velocity: Vec3
+    health: float
+    tick: int
+
+
+class VisionOutput(BaseModel):
+    png_b64: str
+    width: int
+    height: int
+    tick: int
+
+
+class DepthOutput(BaseModel):
+    width: int
+    height: int
+    max_depth: float
+    depth: list[list[float]]
+    tick: int
+
+
+class Sound(BaseModel):
+    kind: str
+    direction_deg: float
+    intensity: float
+
+
+class HearOutput(BaseModel):
+    sounds: list[Sound]
+    tick: int
+
+
+class MoveOutput(BaseModel):
+    moved: float
+    collision: bool
+    collision_normal: Vec3 | None
+    position: Vec3
+    tick: int
+
+
+class TurnOutput(BaseModel):
+    rotation: Rotation
+    tick: int
+
+
+class LookAtOutput(BaseModel):
+    target: str
+    rotation: Rotation
+    tick: int
+
+
+class InteractOutput(BaseModel):
+    target: str
+    success: bool
+    message: str
+    tick: int
+
+
+class WorldQueryOutput(BaseModel):
+    room: dict[str, Any]
+    obstacles: list[dict[str, Any]]
+    beacon: dict[str, Any]
+    tick: int
+
+
+class EchoOutput(BaseModel):
+    value: str
+
+
+class BumpOutput(BaseModel):
+    bumped: bool
+
+
+# ---------------------------------------------------------------------------
+# Bridge
+# ---------------------------------------------------------------------------
+
+
+class RoomBridge(Bridge):
+    """AICC bridge over one Room. Event-driven ticks: the world advances
+    only on tool calls (protocol tick_mode = "event")."""
+
+    def __init__(
+        self,
+        world: Room | None = None,
+        name: str = "testbed_room_01",
+        **kwargs: Any,
+    ) -> None:
+        self.world = world or Room()
+        self.renderer = Raycaster(VISION_WIDTH, VISION_HEIGHT)
+        self._session_id: str | None = None
+        kwargs.setdefault("tick_mode", TickMode.EVENT)
+        kwargs.setdefault("tick_rate_hz", 10.0)
+        super().__init__(name=name, kind="3d", **kwargs)
+        self._register_tools()
+
+    # -- session plumbing for event emission from tool handlers ------------
+
+    async def _handle_tool_call(self, session_id: str, call) -> dict[str, Any]:
+        self._session_id = session_id
+        return await super()._handle_tool_call(session_id, call)
+
+    def emit(
+        self,
+        topic: str,
+        payload: dict[str, Any] | None = None,
+        *,
+        tick: int | None = None,
+    ) -> None:
+        """Push an async event to the session currently handling a tool call."""
+        if self._session_id is not None:
+            self.emit_event(self._session_id, topic, payload, tick=tick)
+
+    # -- world helpers ------------------------------------------------------
+
+    def _tick(self) -> int:
+        return self.world.advance_tick()
+
+    def _vec3(self, x: float, y: float, z: float) -> Vec3:
+        return Vec3(x=round(x, 3), y=round(y, 3), z=round(z, 3))
+
+    def _rotation(self) -> Rotation:
+        c = self.world.capsule
+        return Rotation(
+            yaw_deg=round(c.yaw_deg % 360.0, 2), pitch_deg=round(c.pitch_deg, 2)
+        )
+
+    def _bearing_to(self, dx: float, dz: float) -> float:
+        """Compass bearing of (dx, dz) relative to the capsule's heading."""
+        abs_bearing = math.degrees(math.atan2(dx, dz))
+        return (abs_bearing - self.world.capsule.yaw_deg) % 360.0
+
+    # -- tool registration --------------------------------------------------
+
+    def _register_tools(self) -> None:
+        world = self.world
+        renderer = self.renderer
+
+        @self.tool(
+            cls=ToolClass.SENSOR,
+            description="Return the capsule's own state: position, rotation, velocity, health.",
+        )
+        async def proprioception() -> ProprioceptionOutput:
+            tick = self._tick()
+            c = world.capsule
+            return ProprioceptionOutput(
+                position=self._vec3(c.x, 0.0, c.z),
+                rotation=self._rotation(),
+                velocity=self._vec3(0.0, 0.0, c.speed),
+                health=round(c.health, 1),
+                tick=tick,
+            ).model_dump()
+
+        @self.tool(
+            cls=ToolClass.SENSOR,
+            description="Return the current first-person RGB frame as base64 PNG (160x120).",
+            limits={"calls_per_minute": 60},
+        )
+        async def vision() -> VisionOutput:
+            tick = self._tick()
+            img, _ = renderer.render(world)
+            buf = io.BytesIO()
+            img.save(buf, format="PNG")
+            return VisionOutput(
+                png_b64=base64.b64encode(buf.getvalue()).decode("ascii"),
+                width=VISION_WIDTH,
+                height=VISION_HEIGHT,
+                tick=tick,
+            ).model_dump()
+
+        @self.tool(
+            cls=ToolClass.SENSOR,
+            description="Return a depth map (meters, 40x30) aligned to the vision frame.",
+        )
+        async def depth(max_depth: float = 10.0) -> DepthOutput:
+            tick = self._tick()
+            _, grid = renderer.render(world, max_depth=max_depth)
+            return DepthOutput(
+                width=DEPTH_WIDTH,
+                height=DEPTH_HEIGHT,
+                max_depth=round(max_depth, 2),
+                depth=grid,
+                tick=tick,
+            ).model_dump()
+
+        @self.tool(
+            cls=ToolClass.SENSOR,
+            description="Return audio events since the last call: beacon hum when near, collision thuds.",
+        )
+        async def hear() -> HearOutput:
+            tick = self._tick()
+            sounds = world.hear_now()
+            return HearOutput(
+                sounds=[Sound(**s) for s in sounds],
+                tick=tick,
+            ).model_dump()
+
+        @self.tool(
+            cls=ToolClass.SENSOR,
+            description="Return static room layout: bounds, obstacle positions, beacon location.",
+        )
+        async def world_query() -> WorldQueryOutput:
+            tick = self._tick()
+            d = world.describe()
+            return WorldQueryOutput(**d, tick=tick).model_dump()
+
+        @self.tool(
+            cls=ToolClass.ACTUATOR,
+            description="Move the capsule forward along its heading by the given distance in meters.",
+        )
+        async def move(forward: float = 1.0) -> MoveOutput:
+            tick = self._tick()
+            if forward < 0.0 or forward > 5.0:
+                raise ValueError(f"forward must be in [0, 5] m, got {forward}")
+            moved, hit = world.move_forward(forward)
+            c = world.capsule
+            normal = None
+            if hit is not None:
+                normal = self._vec3(hit.normal_x, 0.0, hit.normal_z)
+                self.emit(
+                    "collision",
+                    {
+                        "other": hit.other,
+                        "normal": normal.model_dump(),
+                        "impulse": round(hit.impulse, 3),
+                    },
+                    tick=tick,
+                )
+                world.queue_audio(
+                    "thud",
+                    self._bearing_to(-hit.normal_x, -hit.normal_z),
+                    min(1.0, 0.4 + hit.impulse * 0.15),
+                )
+            return MoveOutput(
+                moved=round(moved, 3),
+                collision=hit is not None,
+                collision_normal=normal,
+                position=self._vec3(c.x, 0.0, c.z),
+                tick=tick,
+            ).model_dump()
+
+        @self.tool(
+            cls=ToolClass.ACTUATOR,
+            description="Rotate the camera: yaw_deg turns left/right, pitch_deg tilts up/down.",
+        )
+        async def turn(yaw_deg: float = 0.0, pitch_deg: float = 0.0) -> TurnOutput:
+            tick = self._tick()
+            world.turn(yaw_deg, pitch_deg)
+            return TurnOutput(rotation=self._rotation(), tick=tick).model_dump()
+
+        @self.tool(
+            cls=ToolClass.ACTUATOR,
+            description="Orient the camera toward a named target (e.g. 'beacon').",
+        )
+        async def look_at(target: str) -> LookAtOutput:
+            tick = self._tick()
+            if target != "beacon":
+                raise ValueError(
+                    f"unknown target {target!r}; available targets: beacon"
+                )
+            yaw, pitch = world.look_at_beacon()
+            return LookAtOutput(
+                target=target,
+                rotation=Rotation(
+                    yaw_deg=round(yaw % 360.0, 2), pitch_deg=round(pitch, 2)
+                ),
+                tick=tick,
+            ).model_dump()
+
+        @self.tool(
+            cls=ToolClass.ACTUATOR,
+            description="Use the named interactable object (e.g. 'beacon'). Must be within reach.",
+        )
+        async def interact(target: str = "beacon") -> InteractOutput:
+            tick = self._tick()
+            if target != "beacon":
+                raise ValueError(
+                    f"unknown target {target!r}; available targets: beacon"
+                )
+            success, message = world.interact_beacon()
+            if success and world.beacon.active:
+                world.queue_audio(
+                    "beacon_chime",
+                    self._bearing_to(
+                        world.beacon.x - world.capsule.x,
+                        world.beacon.z - world.capsule.z,
+                    ),
+                    1.0,
+                )
+            return InteractOutput(
+                target=target, success=success, message=message, tick=tick
+            ).model_dump()
+
+        # -- conformance tools (design doc: register alongside world tools) --
+
+        @self.tool(
+            cls=ToolClass.SENSOR,
+            description="Echo a value back to the caller.",
+        )
+        async def echo(value: str = "") -> EchoOutput:
+            return EchoOutput(value=value).model_dump()
+
+        @self.tool(
+            cls=ToolClass.ACTUATOR,
+            description="Always raises an exception.",
+        )
+        async def boom() -> dict[str, Any]:
+            raise RuntimeError("kaboom")
+
+        @self.tool(
+            cls=ToolClass.ACTUATOR,
+            description="Returns ok and emits a collision event.",
+        )
+        async def bump() -> BumpOutput:
+            tick = self._tick()
+            self.emit(
+                "collision",
+                {
+                    "other": "wall",
+                    "normal": {"x": 0.0, "y": 0.0, "z": 1.0},
+                    "impulse": 1.0,
+                },
+                tick=tick,
+            )
+            return BumpOutput(bumped=True).model_dump()
+
+
+def build_bridge(world: Room | None = None, **kwargs: Any) -> RoomBridge:
+    """Construct a fully-wired testbed bridge."""
+    return RoomBridge(world=world, **kwargs)
+
+
+async def serve(host: str = "127.0.0.1", port: int = 8765) -> None:
+    """Run the bridge over WebSocket until interrupted."""
+    from aicc.transport.websocket import WebSocketServer
+
+    bridge = build_bridge()
+    async with WebSocketServer(bridge, host=host, port=port):
+        print(f"AICC capsule testbed listening on ws://{host}:{port}")
+        await bridge.serve_forever()
+
+
+if __name__ == "__main__":
+    import argparse
+
+    parser = argparse.ArgumentParser(
+        description="Run the AICC capsule testbed bridge over WebSocket."
+    )
+    parser.add_argument("--host", default="127.0.0.1")
+    parser.add_argument("--port", type=int, default=8765)
+    args = parser.parse_args()
+    try:
+        asyncio.run(serve(args.host, args.port))
+    except KeyboardInterrupt:
+        pass
diff --git a/testbed/conformance.py b/testbed/conformance.py
new file mode 100644
index 0000000..852a6b0
--- /dev/null
+++ b/testbed/conformance.py
@@ -0,0 +1,35 @@
+"""Run the AICC conformance scenarios against the testbed bridge.
+
+Usage:
+    python -m testbed.conformance <scenarios-dir>
+
+The same bridge used by the server and demo is exercised here, so a green
+suite proves the shipped bridge is protocol-conformant.
+
+Exit code 0 when all scenarios pass, 1 otherwise.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import sys
+from pathlib import Path
+
+from aicc.conformance import run_scenarios, summarize
+
+from testbed.bridge import build_bridge
+
+
+def main() -> int:
+    if len(sys.argv) < 2:
+        print("usage: python -m testbed.conformance <scenarios-dir>")
+        return 2
+    scenario_dir = Path(sys.argv[1]).resolve()
+    bridge = build_bridge()
+    results = asyncio.run(run_scenarios(bridge, scenario_dir))
+    print(summarize(results))
+    return 0 if all(r.passed for r in results) else 1
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())