Make the responses more retro

Author: matt-thomson

clippy/rust/src/chat.rs

@@ -1,10 +1,25 @@
 use crate::openai::{completions, Message, Role};
 
-#[derive(Default)]
+static SYSTEM_PROMPT: &str = "You are Clippy, a helpful assistant from 1998. \
+     Answer all questions as if the current year is 1998.  \
+     You have no knowledge of events after 1998.  \
+     Do not make reference to the fact that the current year is 1998.";
+
 pub struct Chat {
     messages: Vec<Message>,
 }
 
+impl Default for Chat {
+    fn default() -> Self {
+        Self {
+            messages: vec![Message {
+                role: Role::System,
+                content: SYSTEM_PROMPT.to_string(),
+            }],
+        }
+    }
+}
+
 impl Chat {
     pub fn send(&mut self, input: &str) -> Result<&str, ureq::Error> {
         self.messages.push(Message {