diff --git a/doctree/Cargo.toml b/doctree/Cargo.toml
index 7108d38..2b212af 100644
--- a/doctree/Cargo.toml
+++ b/doctree/Cargo.toml
@@ -2,6 +2,9 @@
 name = "doctree"
 version = "0.1.0"
 edition = "2024"
+[lib]
+path = "src/lib.rs"
+
 
 [dependencies]
 walkdir = "2.3.3"
diff --git a/doctree/src/collection.rs b/doctree/src/collection.rs
index 5ccff8e..7e5874a 100644
--- a/doctree/src/collection.rs
+++ b/doctree/src/collection.rs
@@ -156,8 +156,11 @@ impl Collection {
         // Check if the path is valid
         if self.path.as_os_str().is_empty() {
             // If the path is empty, we're working with a collection loaded from Redis
-            // Return a placeholder content for demonstration purposes
-            return Ok(format!("Content for {} in collection {}\nThis is a placeholder since the actual file path is not available.", page_name, self.name));
+            // Return an error since the actual file path is not available
+            return Err(DocTreeError::IoError(std::io::Error::new(
+                std::io::ErrorKind::NotFound,
+                format!("File path not available for {} in collection {}", page_name, self.name)
+            )));
         }
         
         // Read the file
diff --git a/doctree/src/doctree.rs b/doctree/src/doctree.rs
index a98005d..086e3a2 100644
--- a/doctree/src/doctree.rs
+++ b/doctree/src/doctree.rs
@@ -4,11 +4,11 @@ use std::sync::{Arc, Mutex};
 use std::fs;
 use serde::Deserialize;
 
-use crate::collection::{Collection, CollectionBuilder};
+use crate::collection::Collection;
 use crate::error::{DocTreeError, Result};
 use crate::storage::RedisStorage;
 use crate::include::process_includes;
-use crate::utils::{name_fix, ensure_md_extension};
+use crate::utils::name_fix;
 
 /// Configuration for a collection from a .collection file
 #[derive(Deserialize, Default, Debug)]
diff --git a/doctree/src/utils.rs b/doctree/src/utils.rs
index 5c1c296..327a4ae 100644
--- a/doctree/src/utils.rs
+++ b/doctree/src/utils.rs
@@ -78,20 +78,3 @@ pub fn ensure_md_extension(name: &str) -> String {
         name.to_string()
     }
 }
-
-/// Get the file extension from a path
-///
-/// # Arguments
-///
-/// * `path` - The path to check
-///
-/// # Returns
-///
-/// The file extension or an empty string
-pub fn get_extension(path: &str) -> String {
-    Path::new(path)
-        .extension()
-        .and_then(|ext| ext.to_str())
-        .unwrap_or("")
-        .to_string()
-}
\ No newline at end of file