diff --git a/libluna/include/luna/CString.h b/libluna/include/luna/CString.h
index b7ee966f..e7be629a 100644
--- a/libluna/include/luna/CString.h
+++ b/libluna/include/luna/CString.h
@@ -1,3 +1,12 @@
+/**
+ * @file CString.h
+ * @author apio (cloudapio.eu)
+ * @brief Implementations of C-string and memory manipulation functions.
+ *
+ * @copyright Copyright (c) 2022-2023, the Luna authors.
+ *
+ */
+
 #pragma once
 #include <luna/Types.h>
 
diff --git a/libluna/include/luna/CType.h b/libluna/include/luna/CType.h
index 91994286..0f5c74e5 100644
--- a/libluna/include/luna/CType.h
+++ b/libluna/include/luna/CType.h
@@ -1,3 +1,13 @@
+/**
+ * @file CType.h
+ * @author apio (cloudapio.eu)
+ * @brief Implementations of C-like character classification functions, prefixed with an underscore to avoid conflicting
+ * with libc.
+ *
+ * @copyright Copyright (c) 2022-2023, the Luna authors.
+ *
+ */
+
 #pragma once
 
 inline constexpr int _isascii(int c)
diff --git a/libluna/include/luna/DebugLog.h b/libluna/include/luna/DebugLog.h
index 0f78aa53..b44ea231 100644
--- a/libluna/include/luna/DebugLog.h
+++ b/libluna/include/luna/DebugLog.h
@@ -1,7 +1,33 @@
+/**
+ * @file DebugLog.h
+ * @author apio (cloudapio.eu)
+ * @brief Debug logging for platform-agnostic functions.
+ *
+ * @copyright Copyright (c) 2022-2023, the Luna authors.
+ *
+ */
+
 #pragma once
 #include <luna/Attributes.h>
 #include <stdarg.h>
 
+/**
+ * @brief The actual debug log implementation. This must be provided by the platform or user.
+ *
+ * In the kernel, the implementation is located in src/Log.cpp.
+ * For POSIX systems, libluna provides an implementation in src/ImplPOSIX.cpp.
+ *
+ * The printed message must be followed by an implicit newline.
+ *
+ * @param format The format string (in the style of printf).
+ * @param ap The variadic argument list.
+ */
 extern void debug_log_impl(const char* format, va_list ap);
 
+/**
+ * @brief Log a formatted message.
+ *
+ * @param format The format string (in the style of printf).
+ * @param ... The format arguments.
+ */
 void dbgln(const char* format, ...) _format(1, 2);
diff --git a/libluna/src/CString.cpp b/libluna/src/CString.cpp
index b4ffd864..84a1f379 100644
--- a/libluna/src/CString.cpp
+++ b/libluna/src/CString.cpp
@@ -1,6 +1,15 @@
-#include <luna/Alloc.h>
+/**
+ * @file CString.cpp
+ * @author apio (cloudapio.eu)
+ * @brief Implementations of C-string and memory manipulation functions.
+ *
+ * @copyright Copyright (c) 2022-2023, the Luna authors.
+ *
+ */
+
 #include <luna/CString.h>
 #include <luna/CType.h>
+#include <luna/Heap.h>
 
 extern "C"
 {
diff --git a/libluna/src/CppABI.cpp b/libluna/src/CppABI.cpp
index 53fdc4bd..022dc153 100644
--- a/libluna/src/CppABI.cpp
+++ b/libluna/src/CppABI.cpp
@@ -1,3 +1,12 @@
+/**
+ * @file CppABI.cpp
+ * @author apio (cloudapio.eu)
+ * @brief Implementation of some C++ ABI internal functions, mainly __cxa_atexit.
+ *
+ * @copyright Copyright (c) 2023, the Luna authors.
+ *
+ */
+
 typedef void* (*cxa_atexit_func_t)(void*);
 
 struct cxa_atexit_entry
diff --git a/libluna/src/DebugLog.cpp b/libluna/src/DebugLog.cpp
index c926390c..82a6cc51 100644
--- a/libluna/src/DebugLog.cpp
+++ b/libluna/src/DebugLog.cpp
@@ -1,3 +1,12 @@
+/**
+ * @file DebugLog.cpp
+ * @author apio (cloudapio.eu)
+ * @brief Debug logging for platform-agnostic functions.
+ *
+ * @copyright Copyright (c) 2022-2023, the Luna authors.
+ *
+ */
+
 #include <luna/DebugLog.h>
 
 void dbgln(const char* format, ...)