Add /skills command (#8600)

Signed-off-by: Lucas Alvares Gomes <lucasagomes@gmail.com>
Co-authored-by: Lifei Zhou <lifei@squareup.com>

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

@@ -666,6 +666,14 @@ impl CliSession {
                     }
                 }
             }
+            InputResult::LoadSkills(names) => {
+                history.save(editor);
+                self.handle_load_skills(&names).await?;
+            }
+            InputResult::ListSkills => {
+                history.save(editor);
+                self.handle_list_skills().await?;
+            }
         }
         Ok(())
     }
@@ -875,6 +883,55 @@ impl CliSession {
         }
     }
 
+    async fn handle_load_skills(&mut self, names: &[String]) -> Result<()> {
+        // NOTE: We don't validate the skill names here because the load_skill tool will
+        // handle that and provide feedback to the user if any skill names are invalid.
+        let message = format!(
+            "Use the load_skill tool to load the following skills: {}.",
+            names
+                .iter()
+                .map(|n| format!("\"{}\"", n))
+                .collect::<Vec<_>>()
+                .join(", ")
+        );
+        self.push_message(Message::user().with_text(&message));
+        output::show_thinking();
+        let result = self
+            .process_agent_response(true, CancellationToken::default())
+            .await;
+        output::hide_thinking();
+        result?;
+
+        Ok(())
+    }
+
+    async fn handle_list_skills(&mut self) -> Result<()> {
+        use comfy_table::{presets, Cell, ContentArrangement, Table};
+        use goose::agents::platform_extensions::skills::list_installed_skills;
+        let cwd = std::env::current_dir().unwrap_or_default();
+        let skills = list_installed_skills(Some(&cwd));
+
+        if skills.is_empty() {
+            println!("{}", console::style("No skills available.").yellow());
+            return Ok(());
+        }
+
+        let mut table = Table::new();
+        table.set_content_arrangement(ContentArrangement::Dynamic);
+        table.load_preset(presets::ASCII_FULL);
+        table.set_header(vec!["Skill", "Description"]);
+
+        let mut sorted_skills = skills;
+        sorted_skills.sort_by(|a, b| a.name.cmp(&b.name));
+
+        for skill in &sorted_skills {
+            table.add_row(vec![Cell::new(&skill.name), Cell::new(&skill.description)]);
+        }
+
+        println!("{table}");
+        Ok(())
+    }
+
     async fn handle_compact(&mut self) -> Result<()> {
         let prompt = "Are you sure you want to compact this conversation? This will condense the message history.";
         let should_summarize = match cliclack::confirm(prompt).initial_value(true).interact() {