Initial Coworker app scaffold

packages/core/src/providers.ts

@@ -0,0 +1,65 @@
+import { ModelProvider, ProviderProbeResult } from "./types";
+import { createId, nowIso } from "./ids";
+
+export function createProvider(
+  kind: ModelProvider["kind"],
+  name: string,
+  baseUrl: string
+): ModelProvider {
+  const createdAt = nowIso();
+  return {
+    id: createId("provider"),
+    name: name.trim(),
+    kind,
+    baseUrl: normalizeBaseUrl(baseUrl),
+    enabled: true,
+    supportsTools: kind !== "ollama",
+    contextWindow: 8192,
+    defaults: {},
+    createdAt,
+    updatedAt: createdAt
+  };
+}
+
+export function normalizeBaseUrl(baseUrl: string): string {
+  return baseUrl.trim().replace(/\/+$/, "");
+}
+
+export async function probeOpenAiCompatibleProvider(
+  provider: ModelProvider,
+  fetchImpl: typeof fetch = fetch
+): Promise<ProviderProbeResult> {
+  const url = `${normalizeBaseUrl(provider.baseUrl)}/models`;
+  try {
+    const response = await fetchImpl(url, {
+      headers: provider.apiKey ? { Authorization: `Bearer ${provider.apiKey}` } : undefined
+    });
+    if (!response.ok) {
+      return {
+        ok: false,
+        providerId: provider.id,
+        models: [],
+        message: `Provider returned HTTP ${response.status}`
+      };
+    }
+    const body = await response.json() as { data?: Array<{ id?: string }>; models?: string[] };
+    const models = Array.isArray(body.data)
+      ? body.data.map((model) => model.id).filter(Boolean) as string[]
+      : Array.isArray(body.models)
+        ? body.models
+        : [];
+    return {
+      ok: models.length > 0,
+      providerId: provider.id,
+      models,
+      message: models.length > 0 ? "Provider is reachable." : "Provider responded without model ids."
+    };
+  } catch (error) {
+    return {
+      ok: false,
+      providerId: provider.id,
+      models: [],
+      message: error instanceof Error ? error.message : "Provider probe failed."
+    };
+  }
+}