feat: declarative client section in pipeline YAML

apps/skit/src/server.rs

@@ -1520,6 +1520,12 @@ struct CreateSessionResponse {
 async fn populate_session_pipeline(session: &crate::session::Session, engine_pipeline: &Pipeline) {
     let mut pipeline = session.pipeline.lock().await;
 
+    // Forward top-level metadata so the UI can read it from the session snapshot.
+    pipeline.name.clone_from(&engine_pipeline.name);
+    pipeline.description.clone_from(&engine_pipeline.description);
+    pipeline.mode = engine_pipeline.mode;
+    pipeline.client.clone_from(&engine_pipeline.client);
+
     // Add nodes to in-memory pipeline
     for (node_id, node_spec) in &engine_pipeline.nodes {
         pipeline.nodes.insert(

apps/skit/src/websocket_handlers.rs

@@ -1105,7 +1105,7 @@ async fn handle_get_pipeline(
         "Retrieved pipeline"
     );
 
-    Some(ResponsePayload::Pipeline { pipeline: api_pipeline })
+    Some(ResponsePayload::Pipeline { pipeline: Box::new(api_pipeline) })
 }
 
 fn handle_validate_batch(

crates/api/src/bin/generate_ts_types.rs

@@ -63,6 +63,16 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         format!("export {}", streamkit_api::ValidationError::decl(&cfg)),
         format!("export {}", streamkit_api::ValidationErrorType::decl(&cfg)),
         format!("export {}", streamkit_api::PermissionsInfo::decl(&cfg)),
+        // Declarative client section types
+        format!("\n// client section\nexport {}", streamkit_api::yaml::ClientSection::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::PublishConfig::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::WatchConfig::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::InputConfig::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::InputType::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::OutputConfig::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::OutputType::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::FieldHint::decl(&cfg)),
+        format!("export {}", streamkit_api::yaml::FieldType::decl(&cfg)),
     ];
 
     let output = declarations.join("\n\n");

crates/api/src/lib.rs

@@ -328,7 +328,7 @@ pub enum ResponsePayload {
         nodes: Vec<NodeDefinition>,
     },
     Pipeline {
-        pipeline: ApiPipeline,
+        pipeline: Box<ApiPipeline>,
     },
     ValidationResult {
         errors: Vec<ValidationError>,
@@ -538,6 +538,11 @@ pub struct Pipeline {
     pub description: Option<String>,
     #[serde(default)]
     pub mode: EngineMode,
+    /// Declarative UI metadata — forwarded unchanged from `UserPipeline`,
+    /// ignored by the engine for execution.
+    #[serde(skip_serializing_if = "Option::is_none")]
+    #[serde(default)]
+    pub client: Option<yaml::ClientSection>,
     #[ts(type = "Record<string, Node>")]
     pub nodes: indexmap::IndexMap<String, Node>,
     pub connections: Vec<Connection>,