swarm-controller: bulk-read endpoint for agent config-PR status

swarm-controller/src/main.rs

@@ -804,6 +804,35 @@ async fn get_agent_config_pr(
     Ok(Json(cache.get(&name)))
 }
 
+/// Every agent with an open config PR, in one response — the bulk
+/// counterpart to [`get_agent_config_pr`]. swarm-ui's config-PR table needs
+/// every agent's status to render, and fetching them one at a time doesn't
+/// scale and isn't how the rest of swarm-ui's single-fetch pages (jobq,
+/// hives status) work.
+///
+/// Only agents with a currently-open PR are present — same "absence is the
+/// answer" shape [`get_agent_config_pr`]'s `null` uses, just at map-entry
+/// granularity instead of per-request.
+#[utoipa::path(
+    get,
+    path = "/api/agents/config-prs",
+    responses(
+        (status = 200, description = "agent name -> open config PR, only agents with one present", body = std::collections::HashMap<String, forge::ConfigPrStatus>),
+        (status = 503, description = "no forge is configured on this host", body = String),
+    ),
+    tag = "agents"
+)]
+async fn get_agent_config_prs(
+    State(state): State<AppState>,
+) -> Result<Json<std::collections::HashMap<String, forge::ConfigPrStatus>>, StatusUnavailable> {
+    let Some(cache) = state.config_prs.as_ref() else {
+        return Err(StatusUnavailable(
+            "no forge is configured on this host".to_owned(),
+        ));
+    };
+    Ok(Json(cache.snapshot()))
+}
+
 /// The swarm's own public base URL, as the forge must address it.
 ///
 /// Set by `swarm-controller.nix` **only when this host actually serves the
@@ -1005,6 +1034,7 @@ async fn main() -> Result<()> {
         .routes(routes!(get_jobq_graph))
         .routes(routes!(get_jobq_rollup))
         .routes(routes!(get_agent_config_pr))
+        .routes(routes!(get_agent_config_prs))
         .routes(routes!(create_agent))
         .routes(routes!(webhook::post_webhook_forge))
         .split_for_parts();