fix: expose dynamic provider profiles in backends list

src/mgr/provider-profiles.ts

@@ -1,7 +1,7 @@
 import { createHash, randomUUID } from "node:crypto";
 import { spawn } from "node:child_process";
 import { AgentRunError } from "../common/errors.js";
-import { backendProfileSpec, backendProfileSpecs, isBackendProfileSlug } from "../common/backend-profiles.js";
+import { backendCapabilities, backendProfileSpec, backendProfileSpecs, compareBackendProfiles, isBackendProfileSlug } from "../common/backend-profiles.js";
 import { dsflashGoModelCatalogFile, dsflashGoModelCatalogJson, dsflashGoModelSlug, dsflashGoRuntimeModelCatalogPath } from "../common/model-catalogs.js";
 import type { AgentRunStore } from "./store.js";
 import type { BackendProfile, ExecutionPolicy, JsonRecord, JsonValue } from "../common/types.js";
@@ -48,6 +48,33 @@ export async function listProviderProfiles(options: ProviderProfileOptions = {})
   return { items, count: items.length, valuesPrinted: false };
 }
 
+export async function listBackendCapabilities(options: ProviderProfileOptions = {}): Promise<JsonRecord> {
+  const profiles = new Set<BackendProfile>(backendProfileSpecs.map((spec) => spec.profile));
+  try {
+    for (const profile of await listProviderProfileIds(options)) profiles.add(profile);
+    const dynamicProfiles = [...profiles].filter((profile) => !isBuiltinProviderProfile(profile)).sort(compareBackendProfiles);
+    return {
+      items: backendCapabilities([...profiles]),
+      dynamicProfileDiscovery: {
+        status: "succeeded",
+        dynamicProfiles,
+        dynamicProfileCount: dynamicProfiles.length,
+        valuesPrinted: false,
+      },
+    };
+  } catch (error) {
+    return {
+      items: backendCapabilities([...profiles]),
+      dynamicProfileDiscovery: {
+        status: "failed",
+        failureKind: error instanceof AgentRunError ? error.failureKind : "infra-failed",
+        message: redactText(error instanceof Error ? error.message : String(error)),
+        valuesPrinted: false,
+      },
+    };
+  }
+}
+
 export async function showProviderProfile(profile: string, options: ProviderProfileOptions = {}): Promise<JsonRecord> {
   return providerProfileStatus(validateBackendProfile(profile), options);
 }
@@ -328,14 +355,7 @@ async function listProviderProfileIds(options: ProviderProfileOptions): Promise<
 }
 
 function compareProviderProfiles(left: string, right: string): number {
-  const leftIndex = backendProfileSpecs.findIndex((item) => item.profile === left);
-  const rightIndex = backendProfileSpecs.findIndex((item) => item.profile === right);
-  if (leftIndex >= 0 || rightIndex >= 0) {
-    if (leftIndex < 0) return 1;
-    if (rightIndex < 0) return -1;
-    if (leftIndex !== rightIndex) return leftIndex - rightIndex;
-  }
-  return left.localeCompare(right);
+  return compareBackendProfiles(left, right);
 }
 
 function isBuiltinProviderProfile(profile: BackendProfile): boolean {