diff --git a/.gitignore b/.gitignore
index df0918f..066ea91 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
 /target
-/history
+/history.json
diff --git a/README.md b/README.md
index 1d1e772..06dafc7 100644
--- a/README.md
+++ b/README.md
@@ -22,8 +22,8 @@ $ ./src/kub.ts
 
 ## TODO
 
+- [ ] Auto update.
 - [ ] Colored chat.
-- [ ] Persistent chat.
 - [ ] System messages.
   - Change of days.
 - [ ] Tools.
diff --git a/history.json b/history.json
deleted file mode 100644
index eb26cf5..0000000
--- a/history.json
+++ /dev/null
@@ -1 +0,0 @@
-{"messages":[]}
\ No newline at end of file
diff --git a/src/lib/history.ts b/src/lib/history.ts
index b3c503b..94dc99a 100644
--- a/src/lib/history.ts
+++ b/src/lib/history.ts
@@ -7,9 +7,10 @@ export class History {
 		private limit: number,
 	) {}
 
-	public push(value: Message) {
+	public async push(value: Message) {
 		this.messages.push(value)
 		while (this.messages.length > this.limit) this.messages.splice(0, 1)
+		await this.save()
 	}
 
 	public static async load(path: string, limit: number) {
@@ -30,6 +31,6 @@ export class History {
 	}
 
 	private async save() {
-		await Deno.writeTextFile(this.path, JSON.stringify({ messages: this.messages }))
+		await Deno.writeTextFile(this.path, JSON.stringify({ messages: this.messages }, null, 4))
 	}
 }
diff --git a/src/lib/session.ts b/src/lib/session.ts
index 6ac4073..280e7e6 100644
--- a/src/lib/session.ts
+++ b/src/lib/session.ts
@@ -24,8 +24,14 @@ export async function session(conn: Deno.TcpConn, name: string, history: History
 	for await (const line of lines) {
 		if (line === "") continue
 		if (line.length > 10_000) return
-		console.log("prompted '", line, "' by ", conn.remoteAddr.hostname)
-		await write_encoded(conn, "\n< ")
+		console.log("user", conn.remoteAddr.hostname, "promoted", line)
+		if (line.startsWith("/nick ")) {
+			name = line.slice("/nick ".length)
+			console.log("Changed name of", conn.remoteAddr.hostname, "to", name)
+			await write_encoded(conn, "\n> ")
+			continue
+		}
+		await write_encoded(conn, "\n[kub] ")
 		const user_message = make_message(name, line)
 		const response_parts = await get_response_parts(history, user_message)
 		let content = "", role = "assistant"
@@ -34,9 +40,9 @@ export async function session(conn: Deno.TcpConn, name: string, history: History
 			content += part.message.content
 			role = part.message.role
 		}
-		await write_encoded(conn, "\n\n>")
-		history.push(user_message)
-		history.push({ role, content })
+		await write_encoded(conn, "\n\n> ")
+		await history.push(user_message)
+		await history.push({ role, content })
 	}
 }