fix: `.starter` tab completion (#709)

src/config/mod.rs

@@ -1149,9 +1149,16 @@ impl Config {
             .or_else(|| env::var("VISUAL").ok().or_else(|| env::var("EDITOR").ok()))
     }
 
-    pub fn repl_complete(&self, cmd: &str, args: &[&str]) -> Vec<(String, Option<String>)> {
-        let (values, filter) = if args.len() == 1 {
-            let values = match cmd {
+    pub fn repl_complete(
+        &self,
+        cmd: &str,
+        args: &[&str],
+        line: &str,
+    ) -> Vec<(String, Option<String>)> {
+        let mut values: Vec<(String, Option<String>)> = vec![];
+        let mut filter = "";
+        if args.len() == 1 {
+            values = match cmd {
                 ".role" => self
                     .roles
                     .iter()
@@ -1203,9 +1210,9 @@ impl Config {
                 .collect(),
                 _ => vec![],
             };
-            (values, args[0])
-        } else if args.len() == 2 && cmd == ".set" {
-            let values = match args[0] {
+            filter = args[0]
+        } else if cmd == ".set" && args.len() == 2 {
+            let candidates = match args[0] {
                 "max_output_tokens" => match self.model.max_output_tokens() {
                     Some(v) => vec![v.to_string()],
                     None => vec![],
@@ -1242,9 +1249,16 @@ impl Config {
                 "highlight" => complete_bool(self.highlight),
                 _ => vec![],
             };
-            (values.into_iter().map(|v| (v, None)).collect(), args[1])
-        } else {
-            return vec![];
+            values = candidates.into_iter().map(|v| (v, None)).collect();
+            filter = args[1];
+        } else if cmd == ".starter" && args.len() >= 2 {
+            if let Some(agent) = &self.agent {
+                values = agent
+                    .conversation_staters()
+                    .iter()
+                    .filter_map(|v| v.strip_prefix(line).map(|x| (x.to_string(), None)))
+                    .collect()
+            }
         };
         values
             .into_iter()

src/repl/completer.rs

@@ -48,13 +48,18 @@ impl Completer for ReplCompleter {
 
         if parts_len > 1 {
             let span = Span::new(parts[parts_len - 1].1, pos);
+            let args_line = &line[parts[1].1..];
             let args: Vec<&str> = parts.iter().skip(1).map(|(v, _)| *v).collect();
-            suggestions.extend(self.config.read().repl_complete(cmd, &args).iter().map(
-                |(value, description)| {
-                    let description = description.as_deref().unwrap_or_default();
-                    create_suggestion(value, description, span)
-                },
-            ))
+            suggestions.extend(
+                self.config
+                    .read()
+                    .repl_complete(cmd, &args, args_line)
+                    .iter()
+                    .map(|(value, description)| {
+                        let description = description.as_deref().unwrap_or_default();
+                        create_suggestion(value, description, span)
+                    }),
+            )
         }
 
         if suggestions.is_empty() {