feat: show installed skills in UI (#7910)

Signed-off-by: Vincenzo Palazzo <vincenzopalazzodev@gmail.com>
Signed-off-by: Douwe Osinga <douwe@squareup.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Co-authored-by: Douwe Osinga <douwe@squareup.com>

crates/goose-server/src/routes/config_management.rs

@@ -135,6 +135,7 @@ pub enum ConfigValueResponse {
 pub enum CommandType {
     Builtin,
     Recipe,
+    Skill,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize, ToSchema)]
@@ -387,14 +388,23 @@ pub async fn get_provider_models(
     }
 }
 
+#[derive(Deserialize, utoipa::IntoParams)]
+pub struct SlashCommandsQuery {
+    /// Optional working directory to discover local skills from
+    pub working_dir: Option<String>,
+}
+
 #[utoipa::path(
     get,
     path = "/config/slash_commands",
+    params(SlashCommandsQuery),
     responses(
         (status = 200, description = "Slash commands retrieved successfully", body = SlashCommandsResponse)
     )
 )]
-pub async fn get_slash_commands() -> Result<Json<SlashCommandsResponse>, ErrorResponse> {
+pub async fn get_slash_commands(
+    axum::extract::Query(query): axum::extract::Query<SlashCommandsQuery>,
+) -> Result<Json<SlashCommandsResponse>, ErrorResponse> {
     let mut commands: Vec<_> = slash_commands::list_commands()
         .iter()
         .map(|command| SlashCommand {
@@ -412,6 +422,23 @@ pub async fn get_slash_commands() -> Result<Json<SlashCommandsResponse>, ErrorRe
         });
     }
 
+    let working_dir = query.working_dir.map(std::path::PathBuf::from);
+    for source in
+        goose::agents::platform_extensions::summon::list_installed_sources(working_dir.as_deref())
+    {
+        if matches!(
+            source.kind,
+            goose::agents::platform_extensions::summon::SourceKind::Skill
+                | goose::agents::platform_extensions::summon::SourceKind::BuiltinSkill
+        ) {
+            commands.push(SlashCommand {
+                command: source.name,
+                help: source.description,
+                command_type: CommandType::Skill,
+            });
+        }
+    }
+
     Ok(Json(SlashCommandsResponse { commands }))
 }