diff --git a/README.md b/README.md
index 8218679..8e52b77 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,9 @@
 SQL in C++ 2.0 is an educational relational database engine and command-line DSL implemented from first principles.
 It parses a focused subset of SQL, persists records in checksummed pages, maintains persistent B+ tree indexes, recovers atomic single-writer statements through a WAL, and evaluates compound filters with a shunting-yard pipeline.
 
+I wrote the first version in 2023 while learning C++ and rebuilt the storage engine in 2026.
+The [`original-2023`](https://github.com/hskl18/SQL/tree/original-2023) tag keeps the first version.
+
 ![Command-line preview](image/preview.png)
 
 ## What it supports
@@ -36,7 +39,6 @@ Values are stored and ordered as strings, so numeric-looking values use lexical
 | `includes/sql` | Coordinates parsing and table operations through the public `SQL` interface. |
 
 Storage invariants, query semantics, and deliberate limits are documented in [DESIGN.md](DESIGN.md).
-The canonical repository is [hskl18/SQL](https://github.com/hskl18/SQL).
 
 ## Build
 
diff --git a/docs/release-checklist-v2.md b/docs/release-checklist-v2.md
deleted file mode 100644
index ca5b193..0000000
--- a/docs/release-checklist-v2.md
+++ /dev/null
@@ -1,15 +0,0 @@
-# Version 2.0.0 release checklist
-
-This checklist prepares the repository for a later release without creating a tag or GitHub Release.
-
-- [ ] Confirm the CMake project version is `2.0.0`.
-- [ ] Confirm `run_sql --version` reports CLI `2.0.0` and storage format `2`.
-- [ ] Run the complete Release CTest suite on Linux and macOS.
-- [ ] Run AddressSanitizer and UndefinedBehaviorSanitizer with warnings as errors.
-- [ ] Migrate the canonical v1 fixtures and compare schemas, rows, and indexed range-query results.
-- [ ] Run every deterministic write and recovery crash point.
-- [ ] Run superblock, page, WAL, child-pointer, and partial-record corruption tests.
-- [ ] Confirm persistent indexes reopen without a row-derived rebuild.
-- [ ] Confirm the v1 source files remain byte-identical after migration.
-- [ ] Review the documented single-process and single-writer compatibility boundary.
-- [ ] Review the pull request CI evidence before a maintainer creates `v2.0.0`.
diff --git a/includes/linked_list/linked_list_functions/linked_list_functions.h b/includes/linked_list/linked_list_functions/linked_list_functions.h
index 39c0336..6c173bc 100644
--- a/includes/linked_list/linked_list_functions/linked_list_functions.h
+++ b/includes/linked_list/linked_list_functions/linked_list_functions.h
@@ -64,8 +64,6 @@ node<T>* _last_node(node<T>* head);
 
 // Definition
 
-// TODO
-
 // Linked List General Functions:
 template <typename T>
 void _print_list(node<T>* head)
diff --git a/includes/linked_list/node/node.h b/includes/linked_list/node/node.h
index 091e086..708b7aa 100644
--- a/includes/linked_list/node/node.h
+++ b/includes/linked_list/node/node.h
@@ -20,7 +20,6 @@ struct node{
 
 // Definition
 
-// TODO
 template <typename T>
 node<T>::node(const T& item, node<T>* next){
     this->_item = item;
diff --git a/includes/linked_list/queue/MyQueue.h b/includes/linked_list/queue/MyQueue.h
index 465f41c..0823048 100644
--- a/includes/linked_list/queue/MyQueue.h
+++ b/includes/linked_list/queue/MyQueue.h
@@ -119,8 +119,6 @@ class Queue{
 
 // Definition
 
-// TODO
-
 template <typename T>
 Queue<T>::Queue(){
     this->_front = nullptr;
diff --git a/includes/linked_list/stack/MyStack.h b/includes/linked_list/stack/MyStack.h
index d6c432b..ffe1d3e 100644
--- a/includes/linked_list/stack/MyStack.h
+++ b/includes/linked_list/stack/MyStack.h
@@ -96,8 +96,6 @@ class Stack{
 
 // Definition
 
-// TODO
-
 template <typename T>
 Stack<T>::Stack(){
     this->_size = 0;
diff --git a/includes/map/bplustree.h b/includes/map/bplustree.h
index 098afe5..6e4b73f 100644
--- a/includes/map/bplustree.h
+++ b/includes/map/bplustree.h
@@ -622,6 +622,4 @@ bool BPlusTree<Item>::is_valid() const
     return true;
 }
 
-// TODO
-
 #endif // BPLUSTREE_H