diff --git a/src/db/migrations/001_create_user_mentions_table.sql b/src/db/migrations/001_create_user_mentions_table.sql
new file mode 100644
index 0000000..bcd5883
--- /dev/null
+++ b/src/db/migrations/001_create_user_mentions_table.sql
@@ -0,0 +1,28 @@
+CREATE TABLE IF NOT EXISTS user_mentions (
+    -- Unique identifier for each record. Auto-incremented to ensure uniqueness.
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    
+    -- The unique identifier of the comment from the r/Drama platform. Not unique in this table
+    -- because a single comment can mention multiple users.
+    rdrama_comment_id TEXT NOT NULL,
+    
+    -- The mentioned Reddit username in a standardized format (e.g., u/username). Lowercased
+    -- to ensure consistency and prevent duplicate entries due to case differences.
+    username TEXT NOT NULL,
+    
+    -- The content of the message sent to the mentioned user, if any. Allows tracking
+    -- of what communication has been made, useful for audit purposes or resending messages.
+    message TEXT,
+    
+    -- Timestamp when the mention was processed and, if applicable, when a message was sent.
+    -- Defaults to the current timestamp at the time of record creation.
+    sent_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+    
+    -- Enforces uniqueness for each comment-username pair to prevent processing and notifying
+    -- the same user mention in the same comment more than once.
+    CONSTRAINT unique_comment_user UNIQUE (rdrama_comment_id, username)
+);
+
+-- Consider adding indexes based on query patterns for improved performance, such as:
+-- CREATE INDEX idx_username ON user_mentions(username);
+-- CREATE INDEX idx_rdrama_comment_id ON user_mentions(rdrama_comment_id);
diff --git a/src/db/migrations/002_create_oauth_tokens_table.sql b/src/db/migrations/002_create_oauth_tokens_table.sql
new file mode 100644
index 0000000..2e2897e
--- /dev/null
+++ b/src/db/migrations/002_create_oauth_tokens_table.sql
@@ -0,0 +1,9 @@
+CREATE TABLE IF NOT EXISTS oauth_tokens (
+    id INTEGER PRIMARY KEY,
+    token_identifier TEXT NOT NULL UNIQUE, -- Static identifier for the OAuth token
+    access_token TEXT NOT NULL,
+    token_type TEXT NOT NULL,
+    expires_in INTEGER NOT NULL,
+    expiry_timestamp INTEGER NOT NULL,
+    scope TEXT NOT NULL
+);