[kimi] Add /api/matrix/config endpoint for world configuration (#674) (#736)

src/dashboard/routes/world.py

@@ -22,11 +22,14 @@ import re
 import time
 from collections import deque
 from datetime import UTC, datetime
+from pathlib import Path
 from typing import Any
 
+import yaml
 from fastapi import APIRouter, WebSocket
 from fastapi.responses import JSONResponse
 
+from config import settings
 from infrastructure.presence import serialize_presence
 from timmy.workshop_state import PRESENCE_FILE
 
@@ -489,6 +492,102 @@ async def _generate_bark(visitor_text: str) -> str:
         return "Hmm, my thoughts are a bit tangled right now."
 
 
+# ---------------------------------------------------------------------------
+# Matrix Configuration Endpoint
+# ---------------------------------------------------------------------------
+
+# Default Matrix configuration (fallback when matrix.yaml is missing/corrupt)
+_DEFAULT_MATRIX_CONFIG: dict[str, Any] = {
+    "lighting": {
+        "ambient_color": "#1a1a2e",
+        "ambient_intensity": 0.4,
+        "point_lights": [
+            {"color": "#FFD700", "intensity": 1.2, "position": {"x": 0, "y": 5, "z": 0}},
+            {"color": "#3B82F6", "intensity": 0.8, "position": {"x": -5, "y": 3, "z": -5}},
+            {"color": "#A855F7", "intensity": 0.6, "position": {"x": 5, "y": 3, "z": 5}},
+        ],
+    },
+    "environment": {
+        "rain_enabled": False,
+        "starfield_enabled": True,
+        "fog_color": "#0f0f23",
+        "fog_density": 0.02,
+    },
+    "features": {
+        "chat_enabled": True,
+        "visitor_avatars": True,
+        "pip_familiar": True,
+        "workshop_portal": True,
+    },
+}
+
+
+def _load_matrix_config() -> dict[str, Any]:
+    """Load Matrix world configuration from matrix.yaml with fallback to defaults.
+
+    Returns a dict with sections: lighting, environment, features.
+    If the config file is missing or invalid, returns sensible defaults.
+    """
+    try:
+        config_path = Path(settings.repo_root) / "config" / "matrix.yaml"
+        if not config_path.exists():
+            logger.debug("matrix.yaml not found, using default config")
+            return _DEFAULT_MATRIX_CONFIG.copy()
+
+        raw = config_path.read_text()
+        config = yaml.safe_load(raw)
+        if not isinstance(config, dict):
+            logger.warning("matrix.yaml invalid format, using defaults")
+            return _DEFAULT_MATRIX_CONFIG.copy()
+
+        # Merge with defaults to ensure all required fields exist
+        result: dict[str, Any] = {
+            "lighting": {
+                **_DEFAULT_MATRIX_CONFIG["lighting"],
+                **config.get("lighting", {}),
+            },
+            "environment": {
+                **_DEFAULT_MATRIX_CONFIG["environment"],
+                **config.get("environment", {}),
+            },
+            "features": {
+                **_DEFAULT_MATRIX_CONFIG["features"],
+                **config.get("features", {}),
+            },
+        }
+
+        # Ensure point_lights is a list
+        if "point_lights" in config.get("lighting", {}):
+            result["lighting"]["point_lights"] = config["lighting"]["point_lights"]
+        else:
+            result["lighting"]["point_lights"] = _DEFAULT_MATRIX_CONFIG["lighting"]["point_lights"]
+
+        return result
+    except Exception as exc:
+        logger.warning("Failed to load matrix config: %s, using defaults", exc)
+        return _DEFAULT_MATRIX_CONFIG.copy()
+
+
+@matrix_router.get("/config")
+async def get_matrix_config() -> JSONResponse:
+    """Return Matrix world configuration.
+
+    Serves lighting presets, environment settings, and feature flags
+    to the Matrix frontend so it can be config-driven rather than
+    hardcoded. Reads from config/matrix.yaml with sensible defaults.
+
+    Response structure:
+    - lighting: ambient_color, ambient_intensity, point_lights[]
+    - environment: rain_enabled, starfield_enabled, fog_color, fog_density
+    - features: chat_enabled, visitor_avatars, pip_familiar, workshop_portal
+    """
+    config = _load_matrix_config()
+    return JSONResponse(
+        content=config,
+        headers={"Cache-Control": "no-cache, no-store"},
+    )
+
+
 # ---------------------------------------------------------------------------
 # Matrix Agent Registry Endpoint
 # ---------------------------------------------------------------------------