cli: add summarize slash command (#2464)

crates/goose-cli/src/session/input.rs

@@ -18,6 +18,7 @@ pub enum InputResult {
     Plan(PlanCommandOptions),
     EndPlan,
     Recipe(Option<String>),
+    Summarize,
 }
 
 #[derive(Debug)]
@@ -91,6 +92,7 @@ fn handle_slash_command(input: &str) -> Option<InputResult> {
     const CMD_PLAN: &str = "/plan";
     const CMD_ENDPLAN: &str = "/endplan";
     const CMD_RECIPE: &str = "/recipe";
+    const CMD_SUMMARIZE: &str = "/summarize";
 
     match input {
         "/exit" | "/quit" => Some(InputResult::Exit),
@@ -133,6 +135,7 @@ fn handle_slash_command(input: &str) -> Option<InputResult> {
         s if s.starts_with(CMD_PLAN) => parse_plan_command(s[CMD_PLAN.len()..].trim().to_string()),
         s if s == CMD_ENDPLAN => Some(InputResult::EndPlan),
         s if s.starts_with(CMD_RECIPE) => parse_recipe_command(s),
+        s if s == CMD_SUMMARIZE => Some(InputResult::Summarize),
         _ => None,
     }
 }
@@ -241,6 +244,7 @@ fn print_help() {
 /endplan - Exit plan mode and return to 'normal' goose mode.
 /recipe [filepath] - Generate a recipe from the current conversation and save it to the specified filepath (must end with .yaml).
                        If no filepath is provided, it will be saved to ./recipe.yaml.
+/summarize - Summarize the current conversation to reduce context length while preserving key information.
 /? or /help - Display this help message
 
 Navigation:
@@ -474,4 +478,15 @@ mod tests {
         let result = handle_slash_command("/recipe /path/to/file.txt");
         assert!(matches!(result, Some(InputResult::Retry)));
     }
+
+    #[test]
+    fn test_summarize_command() {
+        // Test the summarize command
+        let result = handle_slash_command("/summarize");
+        assert!(matches!(result, Some(InputResult::Summarize)));
+
+        // Test with whitespace
+        let result = handle_slash_command("  /summarize  ");
+        assert!(matches!(result, Some(InputResult::Summarize)));
+    }
 }

crates/goose-cli/src/session/mod.rs

@@ -503,6 +503,53 @@ impl Session {
                         }
                     }
 
+                    continue;
+                }
+                InputResult::Summarize => {
+                    save_history(&mut editor);
+
+                    let prompt = "Are you sure you want to summarize this conversation? This will condense the message history.";
+                    let should_summarize =
+                        cliclack::confirm(prompt).initial_value(true).interact()?;
+
+                    if should_summarize {
+                        println!("{}", console::style("Summarizing conversation...").yellow());
+                        output::show_thinking();
+
+                        // Get the provider for summarization
+                        let provider = self.agent.provider().await?;
+
+                        // Call the summarize_context method which uses the summarize_messages function
+                        let (summarized_messages, _) =
+                            self.agent.summarize_context(&self.messages).await?;
+
+                        // Update the session messages with the summarized ones
+                        self.messages = summarized_messages;
+
+                        // Persist the summarized messages
+                        session::persist_messages(
+                            &self.session_file,
+                            &self.messages,
+                            Some(provider),
+                        )
+                        .await?;
+
+                        output::hide_thinking();
+                        println!(
+                            "{}",
+                            console::style("Conversation has been summarized.").green()
+                        );
+                        println!(
+                            "{}",
+                            console::style(
+                                "Key information has been preserved while reducing context length."
+                            )
+                            .green()
+                        );
+                    } else {
+                        println!("{}", console::style("Summarization cancelled.").yellow());
+                    }
+
                     continue;
                 }
             }