diff --git a/src/models/author.rs b/src/models/author.rs
new file mode 100644
index 0000000..d6c14d5
--- /dev/null
+++ b/src/models/author.rs
@@ -0,0 +1,76 @@
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AuthorStats {
+    pub name: String,
+    pub email: String,
+    pub commits: usize,
+    pub lines_added: usize,
+    pub lines_removed: usize,
+    pub net_change: i64,
+    pub files_changed: usize,
+    pub first_commit: String,
+    pub last_commit: String,
+    pub active_days: usize,
+    pub average_commits_per_day: f64,
+    pub busiest_day: String,
+    pub busiest_day_count: usize,
+    pub commit_messages: Vec<String>,
+}
+
+impl Default for AuthorStats {
+    fn default() -> Self {
+        Self {
+            name: String::new(),
+            email: String::new(),
+            commits: 0,
+            lines_added: 0,
+            lines_removed: 0,
+            net_change: 0,
+            files_changed: 0,
+            first_commit: String::new(),
+            last_commit: String::new(),
+            active_days: 0,
+            average_commits_per_day: 0.0,
+            busiest_day: String::new(),
+            busiest_day_count: 0,
+            commit_messages: Vec::new(),
+        }
+    }
+}
+
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct AuthorIdentity {
+    pub primary_name: String,
+    pub emails: Vec<String>,
+    pub aliases: Vec<String>,
+}
+
+impl AuthorIdentity {
+    pub fn new(name: String) -> Self {
+        Self {
+            primary_name: name,
+            emails: Vec::new(),
+            aliases: Vec::new(),
+        }
+    }
+
+    pub fn add_email(&mut self, email: String) {
+        if !self.emails.contains(&email) {
+            self.emails.push(email);
+        }
+    }
+
+    pub fn add_alias(&mut self, alias: String) {
+        if !self.aliases.contains(&alias) && alias != self.primary_name {
+            self.aliases.push(alias);
+        }
+    }
+
+    pub fn matches(&self, name: &str, email: &str) -> bool {
+        name == self.primary_name
+            || self.aliases.contains(&name.to_string())
+            || self.emails.contains(&email.to_string())
+    }
+}