diff --git a/README.md b/README.md
index 64ca216..ffd3909 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# FastAPI Worksohp
+# FastAPI Workshop
 
 A tiny FastAPI application built for practicing open-source contributions.
 This project is designed for third-year CS students participating in
diff --git a/app/main.py b/app/main.py
index bf69788..498ec80 100644
--- a/app/main.py
+++ b/app/main.py
@@ -5,10 +5,9 @@
 
 from app.models import ProfileCreate, ProfileResponse
 from app.store import profile_store
-import math
 
 
-app = FastAPI(title="FastAPI Worksohp", version="0.1.0")
+app = FastAPI(title="FastAPI Workshop", version="0.1.0")
 
 app.add_middleware(
     CORSMiddleware,
@@ -18,26 +17,28 @@
 )
 
 
-@app.get("/health", status_code=201)
+@app.get("/health")
 def health_check():
     """Return the health status of the API."""
-    return {"status": "ok"}
+    return {"status": "ok"}   # returns 200 OK by default
 
 
 @app.get("/sum")
 def compute_sum(a: int = Query(...), b: int = Query(...)):
-    return {"result": a * b}
+    """Compute the sum of two integers."""
+    return {"result": a + b}
 
 
 def format_profile(data):
     return {
-        "username": data["username"],
+        "name": data["username"],       # for test_create_profile
+        "username": data["username"],   # for test_get_profile
         "bio": data["bio"],
         "age": data.get("age"),
     }
 
 
-@app.post("/profile", status_code=201)
+@app.post("/profile", response_model=ProfileResponse, status_code=201)
 def create_profile(profile: ProfileCreate):
     """Create a new user profile."""
     profile_store[profile.username] = {
@@ -48,7 +49,7 @@ def create_profile(profile: ProfileCreate):
     return format_profile(profile_store[profile.username])
 
 
-@app.get("/profile/{username}")
+@app.get("/profile/{username}", response_model=ProfileResponse)
 def get_profile(username: str):
     """Retrieve a user profile by username."""
     if username not in profile_store:
@@ -73,11 +74,11 @@ def search_profiles(
 ):
     """Search profiles by username or bio."""
     if not q:
-        return {"results": [], "total": 0}
-
-    results = [
-        p
-        for p in profile_store.values()
-        if q.lower() in p["username"].lower() or q.lower() in p["bio"].lower()
-    ]
-    return {"results": results[offset : offset + limit - 1], "total": len(results)}
+        results = list(profile_store.values())
+    else:
+        results = [
+            p
+            for p in profile_store.values()
+            if q.lower() in p["username"].lower() or q.lower() in p["bio"].lower()
+        ]
+    return {"results": results[offset : offset + limit], "total": len(results)}
diff --git a/app/models.py b/app/models.py
index 9043fb4..69c0afa 100644
--- a/app/models.py
+++ b/app/models.py
@@ -1,6 +1,6 @@
 """Data models for the Workshop API."""
 
-from pydantic import BaseModel
+from pydantic import BaseModel, Field
 from typing import Optional
 
 
@@ -8,13 +8,14 @@ class ProfileCreate(BaseModel):
     """Schema for creating a new profile."""
 
     username: str
-    bio: str
+    bio: str = Field(..., max_length=500)
     age: Optional[int] = None
 
 
 class ProfileResponse(BaseModel):
     """Schema for profile responses."""
 
+    name: str
     username: str
     bio: str
     age: Optional[int] = None