2 files changed, 30 insertions, 4 deletions

diff --git a/src/client/core.rs b/src/client/core.rs
index 0e54fba..a910a68 100644
--- a/src/client/core.rs
+++ b/src/client/core.rs
@@ -1,7 +1,8 @@
 use crate::client::games::manager::GameManager;
 use crate::client::games::response::parse_spin_response;
 use crate::client::ui::{
-    command_names, help_lines, input_cursor_column, parse_bet_arg, record_history,
+    command_names, completion_lines, help_lines, input_cursor_column, parse_bet_arg,
+    record_history,
 };
 
 #[derive(Debug, Clone, Copy, PartialEq, Eq)]
@@ -439,9 +440,7 @@ impl ClientCore {
         if matches.len() == 1 {
             self.input = matches[0].to_string();
         } else if matches.len() > 1 {
-            let mut lines = vec!["Possible completions:".to_string()];
-            lines.push(matches.join(" "));
-            effects.push(Effect::Print(lines));
+            effects.push(Effect::Print(completion_lines(&matches, 76)));
         }
         if let Some(prompt) = self.prompt_effect() {
             effects.push(prompt);
diff --git a/src/client/ui.rs b/src/client/ui.rs
index 036c36a..6fc2f62 100644
--- a/src/client/ui.rs
+++ b/src/client/ui.rs
@@ -102,6 +102,33 @@ pub fn help_lines() -> Vec<String> {
     lines
 }
 
+/// Wrap a completion list to `width` columns, one space between names.
+pub fn completion_lines(commands: &[&str], width: usize) -> Vec<String> {
+    let mut lines = vec!["Possible completions:".to_string()];
+    let mut current = String::new();
+
+    for command in commands {
+        let needed = if current.is_empty() {
+            command.len()
+        } else {
+            current.len() + 1 + command.len()
+        };
+        if !current.is_empty() && needed > width {
+            lines.push(current.clone());
+            current.clear();
+        }
+        if !current.is_empty() {
+            current.push(' ');
+        }
+        current.push_str(command);
+    }
+
+    if !current.is_empty() {
+        lines.push(current);
+    }
+    lines
+}
+
 /// Add a command to the history, skipping blanks and consecutive duplicates.
 pub fn record_history(history: &mut Vec<String>, line: &str) {
     let line = line.trim();