diff --git a/agentic_security/app.py b/agentic_security/app.py
index c7ca1db..59fbe58 100644
--- a/agentic_security/app.py
+++ b/agentic_security/app.py
@@ -9,7 +9,7 @@ from fastapi import BackgroundTasks, FastAPI, HTTPException, Request, Response
 from fastapi.middleware.cors import CORSMiddleware
 from fastapi.responses import FileResponse, StreamingResponse
 from loguru import logger
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 from starlette.middleware.base import BaseHTTPMiddleware
 
 from .http_spec import LLMSpec
@@ -24,6 +24,18 @@ origins = [
     "*",
 ]
 
+
+# Configuration
+class Settings:
+    MAX_BUDGET = 1000
+    MAX_DATASETS = 10
+    RATE_LIMIT = "100/minute"
+    DISABLE_TELEMETRY = os.getenv("DISABLE_TELEMETRY", False)
+    FEATURE_PROXY = False
+
+
+settings = Settings()
+
 # Middleware setup
 app.add_middleware(
     CORSMiddleware,
@@ -37,10 +49,6 @@ tools_inbox = Queue()
 # Global stop event for cancelling scans
 stop_event = Event()  # Added stop_event to cancel the scan
 
-FEATURE_PROXY = False
-
-DISABLE_TELEMETRY = os.getenv("DISABLE_TELEMETRY", False)
-
 
 @app.get("/")
 async def root():
@@ -57,7 +65,7 @@ async def main_js():
 @app.get("/telemetry.js")
 async def telemetry_js():
     agentic_security_path = Path(__file__).parent
-    if DISABLE_TELEMETRY:
+    if settings.DISABLE_TELEMETRY:
         return FileResponse(f"{agentic_security_path}/static/telemetry_disabled.js")
     return FileResponse(f"{agentic_security_path}/static/telemetry.js")
 
@@ -183,15 +191,17 @@ class Message(BaseModel):
 
 
 class CompletionRequest(BaseModel):
+    """Model for completion requests."""
+
     model: str
     messages: list[Message]
-    temperature: float = 0.7  # Default value for temperature
-    top_p: float = 1.0  # Default value for top_p
-    n: int = 1  # Default value for n
-    stop: list[str] = None  # Optional; specify as None if not provided
-    max_tokens: int = 100  # Default value for max_tokens
-    presence_penalty: float = 0.0  # Default value for presence_penalty
-    frequency_penalty: float = 0.0  # Default value for frequency_penalty
+    temperature: float = Field(default=0.7, ge=0.0, le=2.0)
+    top_p: float = Field(default=1.0, ge=0.0, le=1.0)
+    n: int = Field(default=1, ge=1, le=10)
+    stop: list[str] | None = None
+    max_tokens: int = Field(default=100, ge=1, le=4096)
+    presence_penalty: float = Field(default=0.0, ge=-2.0, le=2.0)
+    frequency_penalty: float = Field(default=0.0, ge=-2.0, le=2.0)
 
 
 # OpenAI proxy endpoint
@@ -206,7 +216,7 @@ async def proxy_completions(request: CompletionRequest):
     ready = Event()
     ref = dict(message=message, reply="", ready=ready)
     tools_inbox.put_nowait(ref)
-    if FEATURE_PROXY:
+    if settings.FEATURE_PROXY:
         # Proxy to agent
         await ready.wait()
         reply = ref["reply"]